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Rev A 1918-R Power Meter User`s Manual

1. RU calculations STMIN_n o en Celsius readings 7 readings as the present reading Return TEC measured temperature o ooo o Table 8 Legacy Commands Reference 15 15 1 15 2 15 3 15 4 15 5 Appendix D Sample Programs Programming Samples The CD will install some simple programming samples to get computer interfacing started These are minimal samples and provided only for reference LabVIEW LabVIEW programming samples separated in folders based on version of LabVIEW compiled with SampleQuery vi demonstrates the use of the drivers Microsoft Visual Basic A zip file in the application folder contains a simple Visual Basic project for communicating with the meter Microsoft Visual C A zip file in the application folder contains a simple Visual C project for communicating with the meter Microsoft NET A zip file in the application folder contains a simple NET project for communicating with the meter Appendix B This page is intentionally left blank 16 16 1 Appendix E Disassembly Instructions NOTE These disassembly instructions are intended only for recycling at the end of the product lifetime For troubleshooting or servicing users should contact the local Newport Corporation representative There are no user serviceable parts inside the equipment Attempting to self service the unit will void the warranty Disassembly instructions Figure 66 shows an
2. For the highest precision and accuracy the 1918 R Optical Meter should be allowed to warm up for one hour before being used for measurements Front Panel Layout CO New pon Power Motor Modol 1916 Figure 13 Front Panel Layout Front Panel Elements The front panel of the 1918 R features the following elements 30 System Overview 3 2 2 3 3 3 3 1 A faceplate with a 4 active color liquid crystal display Setup Enter and Esc keys Rubberized horizontal left right and vertical up down arrow keys Four rubberized blank keys below the display referred to as soft keys later in the manual as their function depends on the text on the screen above the key e Six rubberized buttons with dedicated functions Range Mode Hold Filter Lambda A Zero Understanding the Main Screen The main screen is displayed after startup Figure 13 The middle portion of the main screen is a real time display of power measured in last used units and the lower half of the main screen is a row of four labels for actions that the keys below them will activate Note that the screen will display Saturated message either when the amount of power surpasses the detector saturation specification or when the detector spot size and or detector saturation specifications are missing in the calibration module When an annunciator label is visible its function is enabled If the annunciator appears on the display as an un
3. Response Value Description Mode 0 Prediction algorithm is disabled 1 Prediction algorithm is enabled Related Commands PM THERM PREDICT PM TRIG START Description This command sets the optional start event Syntax PM TRIG START option Parameters The parameter lt option gt is of type lt number gt and is an integer from 0 to 3 Argument Value Description option 0 Continuous measurement 1 Reserved 2 Measurement starts when a designated Soft key is pressed 3 Measurement starts when PM TRIG STATE 1 command is issued Related Commands PM TRIG START PM TRIG START Description Trigger START Query Syntax PM TRIG START Parameters None Function This query returns the TRIGGER START condition Related Commands PM TRIG START PM TRIG STOP Description This command sets the optional stop event 104 Communication Command Reference 8 3 3 91 8 3 3 92 8 3 3 93 Syntax PM TRIG STOP lt option gt Parameters The parameter lt option gt is of type lt number gt and is an integer from 0 to 6 Argument Value Description option 0 The measurement never stops 1 Reserved 2 Measurement stops when a designated Soft key is pressed 3 Measurement stops when PM TRIG STATE 0 command is issued Related Commands PM TRIG STOP PM TRIG STOP Description Trigger STOP Query Syntax PM TRIG STOP Parameters None Function This query returns the TRIGGER STOP condition Related Commands PM TRIG STOP PM T
4. Safety Precautions 19 1 3 1 3 1 Location of Labels e To prevent damage to the equipment read the instructions in the equipment manual for proper input voltage e Adhere to good laser safety practices when using this equipment Location of Labels Rear Panel Markings on the rear panel identify the instrument compliance with different standards and regulations The labels are located in the middle of the rear panel Figure 10 Locations of labels on the rear panel 20 Safety Precautions This page is intentionally left blank 2 1 General Information Introduction The 1918 R Optical Meter is designed to provide a powerful combination of features to measure optical power and energy of near monochromatic or monochromatic sources The instrument is powered by internal rechargeable batteries or via the AC wall plug hence making it a useful tool for both stationary and portable applications Use of the extensive measurement modes and features have been simplified with an intuitive menu driven structure that provides quick access to all modes features and settings Some of the prominent specifications and features that will simplify your calibrated measurement applications are in the following e Compatibility with Photodiode Thermopile and Pyroelectric detectors Low Power Semiconductor Family High Power Thermopile Family Energy Pyroelectric Family PMT GaN PbS PbSe and HgCdZnTe
5. e Measurement rate up to 4 kHz with internal signal sampling rate of 250 kHz e Multiple measurement modes for power and energy measurements Single Continuous Integrated and Peak to Peak Software suite including LabVIEW drivers and Windows application 250 000 internal data point storage External USB flash memory compatibility USB Device interface The full color TFT 4 LCD renders excellent visibility both with the naked eye and laser goggles for single screen rendering of plotted and enumerate results Measurements can be displayed in W Joules Amps Volts dBm dB Sun or relative units either directly or as relative ratio measurements from present or stored values Statistical capabilities include the computation of Min Max Max Min Mean and Standard Deviation Additional features such as digital and analog filtering and data storage of up to 250 000 readings per channel are also offered Newport s experience with calibration together with N I S T calibration traceability and high precision Optical Meters provide users with accurate measurements and exceptional inter instrument correlation In R amp D QA QC 22 General Information and manufacturing environments the 1918 R Series optical meters enable users to benefit from high correlation between multiple locations at a price to performance ratio second to none Among all the other practical tools provided remote controlling with a computer and synchroniz
6. 8 3 3 61 8 3 3 62 PM MAX Power Description Syntax Remarks Response Power Maximum power query PM MAX Power The PM MAX Power returns current range s maximum readable power Type Description float Power in Watts PM MIN Lambda Description Syntax Remarks Response Wavelength Minimum wavelength query PM MIN Lambda The PM MIN Lambda query returns the shortest calibrated wavelength in nanometers If no detector is preset min lambda for the last read detector is returned Type Description int Wavelength in nanometers nm Related Commands PM MAX Lambda PM MIN Power Description Syntax Remarks Response Power Minimum power query PM MIN Power The PM MIN Power returns current range s minimum readable power Type Description float Power in Watts Related Commands PM MAX Power PM MEAS TIMEOUT Description Syntax Remarks Measurement timeout set command PM MEAS TIMEOUT value This command sets the measurement timeout period This value is used for making the following measurements 1 Peak to peak measurements These measurements are updated once every timeout period when the power meter is in Peak Peak Continuous mode Communication Command Reference 95 8 3 3 63 8 3 3 64 2 Auto ranging in Pulse Continuous mode The power meter automatically shifts to a lower range once every timeout period when it determines that no pulse measurements
7. General Usage This software application allows the user to setup and monitor the instrument remotely The controls on the instrument are available in the software in a very easy to read and change format Application Options Connection Configuration Data Display Brightness 100 Channel A Channel B Attenuator lv Attenuator Iv Wavelength 800 t Wavelength 700 a Units W Units A Mode DC CONT Mode DC CONT Figure 57 Application Advanced Options Configuration Tab The application is designed to have menus similar to standard Windows applications like MS Word to ease usability Menu Structure To Exit the application go to the File menu and select Exit The Edit Advanced Options menu has additional property settings including channel settings and data logging options The Help About will show information about the application including firmware version when an instrument is connected and communicating 7 1 7 2 7 2 1 7 2 2 7 2 3 7 2 4 Computer Interfacing General Guidelines The 1918 R Optical Meter has a USB computer interface port used to send commands to the Optical Meter from a host PC The connection to a computer is done via a USB cable Type A Male Connector to Type Mini B Male Connector The commands supported by the Optical Meter can be divided into the following two categories commands that cause the Optical Meter to take a desired action and command
8. Model 1918 R Hand held Optical Meter User s Manual GDS Newport Experience Solutions Preface Preface EU Declaration of QAD Conformity Newport We declare that the accompanying product identified with the CE mark complies with requirements of the Electromagnetic Compatibility Directive 2004 108 EC and the Low Voltage Directive 73 23 EEC Model Number 1918 R Year CE mark affixed 2007 Type of Equipment Electrical equipment for measurement control and laboratory use Manufacturer Newport Corporation 1791 Deere Avenue Irvine California 92606 Standards Applied Compliance was demonstrated to the following standards to the extent applicable BS EN61326 1 1997 A1 A2 A3 Electrical equipment for measurement control and laboratory use EMC requirements Performance criteria B was achieved during immunity tests This equipment meets the CISPR 11 2006 A2 Class A Group 1 radiated and conducted emission limits BS EN 61000 3 2 2001 Harmonic current emissions Class A BS EN 61000 3 3 2002 Voltage fluctuations and flicker BS EN 61010 1 2001 2 Edition Safety requirements for electrical equipment for measurement control and laboratory use Pa AL He Ly A ee Bruno Rety Dan Dunahay Group Director Director of Quality Systems PPT Instrument and Motion Europe 1791 Deere Avenue Zone Industrielle Irvine Ca USA 45340 Beaune la Rolande France Preface Firmware and User Ma
9. Off O 250 kHz 12 5 kHz Figure 3 Digital Filter editing Figure 32 Wavelengths screen 42 System Operation 4 3 4 3 1 4 3 1 1 4 3 1 2 Set Zero Offset Zero Key The Zero Offset key or short Zero key is used to temporarily zero the instrument for the measurement in Range Auto 400 nm progress When the user presses this key the instrument takes the displayed numeric value as offset and subtracts it from all the subsequent measurements When the instrument is zeroed the offset value is displayed on the main screen above the numeric value see Figure 33 Hint Press Setup to ent Figure 353 Zero Selection The Zero key toggles the offset on or off The ESC key has no effect on the Zero function Measurement Settings The Measurement Settings screen has Measurement Settings dual functionality Detector 818P 001 12 l S N e One is the convenience the user has Det temp to change all the measurement fi Responsivity a Ref val settings within one screen igi al Offset nos i Num Digits e The other is information presented Spot size to the user about the detector used From the default screen when pressing a Trigger Correction the Setup Enter key the 1918 R displays the Measurement Settings screen as in Figure 34 Figure 34 Measurement Settings screen Changing the Measurement Settings Within the Measurement Settings screen the user can select the Wavelen
10. Related Materials contain trade secrets of Newport and are for use only in the manner expressly permitted Newport claims and reserves all rights and benefits afforded under law in the Programs provided by Newport Corporation Newport shall retain full ownership of Intellectual Property Rights in and to all development process align or assembly technologies developed and other derivative work that may be developed by Newport Customer shall not challenge or cause any third party to challenge the rights of Newport Preservation of Secrecy and Confidentiality and Restrictions to Access Customer shall protect the Newport Programs and Related Materials as trade secrets of Newport and shall devote its best efforts to ensure that all its personnel protect the Newport Programs as trade secrets of Newport Corporation Customer shall not at any time disclose Newport s trade secrets to any other person firm organization or employee that does not need consistent with Customer s right of use hereunder to obtain access to the Newport Programs and Related Materials These restrictions shall not apply to information 1 generally known to the public or obtainable from public sources 2 readily apparent from the keyboard operations visual display or output reports of the Programs 3 previously in the possession of Customer or subsequently developed or acquired without reliance on the Newport Programs or 4 approved by Newport for release withou
11. Response Type Description Power float Power in Watts Related Commands PM Power PM DS BUFfer Description Data Store buffer behavior selection Syntax PM DS BUFfer behavior Remarks The PM DS BUFfer command selects the behavior mode for control of the Data Store buffer Argument Value Description Mode 0 Fixed Size 1 Ring Buffer The behavior of the ring buffer is to allow continual data collection after the buffer is full where the oldest values will be overwritten when new measurements are taken Related Commands PM DS BUFfer PM DS BUFfer Description Data Store buffer behavior selection query Syntax PM DS BUFfer Remarks The PM DS BUFfer query returns the value of the Data Store buffer behavior Communication Command Reference 89 8 3 3 43 8 3 3 44 8 3 3 45 8 3 3 46 Argument Type Description Behavior int See PM DS BUFfer for a definition of the behavior status PM DS CLear Description Clear the Data Store of all data Syntax PM DS CLear Remarks The PM DS CLear command resets the data store to be empty with no values Argument Type Description none E PM DS Count Description Data Store data item count query Syntax PM DS Count Remarks The PM DS Count query returns the number of measurements that have been collected in the Data Store Argument Type Description count int The number of measurements that have been collected PM DS ENable Description Enable Data Store Collection
12. Syntax PM DS ENable enable Remarks The PM DS ENable enables or disables the collection of measurements in the Data Store Argument Value Description enable 0 Disabled 1 Enabled Data will be collected after the PM DS ENable command has been called with a parameter of 1 Data collection will stop when the PM DS ENable command has been called with a parameter of 0 or when a fixed size data buffer is full Related Commands PM DS ENable PM DS ENable Description Enable Data Store Collection query Syntax PM DS ENable 90 Communication Command Reference 8 3 3 47 8 3 3 48 8 3 3 49 Remarks The PM DS ENable query returns the enabled status of the Data Store Argument Type Description enable int See PM DS Enable for a description of the enable argument PM DS GET Description Retrieve Data Store data query Syntax PM DS GET num Remarks The PM DS GET command returns a number of measurements that have been collected in the Data Store Argument Type Description selection string 1 returns the single value specified 1 10 returns values in the range from 1 10 _5 returns the oldest 5 values same as 1 5 5 returns the newest 5 values Note depending on the number of data points requested there may be several read operations required on the USB interface PM DS INTerval Description Data Store Interval Select Syntax PM DS INTerval lt interval gt Parameters The
13. 0 if no errors Related Commands ERRSTR ERRSTR Description Syntax Remarks Response Error code Error string query ERRSTR The ERRSTR query returns a single error number along with the corresponding error text string that have occurred since the last error query Type Description string Error code number and text for error code as text per Appendix B 0 if no errors Related Commands ERRors PM AC BackLight Description Syntax Remarks Argument Value Inactive time period for reducing the backlight level during AC operation PM AC BackLight value If the instrument is on AC power its display backlight will be reduced to a pre specified level following a period of inactivity specified using this command The instrument is considered to be inactive if either the keys on the front panel are not being pressed or if there is no communication with a host PC over USB interface Value Inactive Time Period 0 1 min 1 5 min 2 30 min Communication Command Reference 77 8 3 3 9 8 3 3 10 3 2 hours 4 Always Related Commands PM AC BackLight PM AC LEVEL PM AC BackLight Description Syntax Remarks Argument Value Inactive time period for reducing the backlight level during AC operation PM AC BackLight The PM AC BackLight query returns an integer indicating the present inactive time period for reducing the backlight level during AC operation Value Inactive Time Peri
14. Do not use this equipment in or near water Route power cords and other cables so they are not likely to be damaged Disconnect power before cleaning the equipment Do not use liquid or aerosol cleaners use only a damp lint free cloth Lockout all electrical power sources before servicing the equipment To avoid fire hazard use only the specified fuse s with the correct type number voltage and current ratings as referenced in the appropriate locations in the service instructions or on the equipment Only qualified service personnel should replace fuses To avoid explosion do not operate this equipment in an explosive atmosphere Qualified service personnel should perform safety checks after any service 1 2 2 General Cautions Observe these cautions when operating or servicing this equipment If this equipment is used in a manner not specified in this manual the protection provided by this equipment may be impaired Do not position this product in such a manner that would make it difficult to disconnect the power cord e Use only the specified replacement parts Follow precautions for static sensitive devices when handling this equipment e This product should only be powered as described in the manual There are no user serviceable parts inside the 1918 R Optical Meter with the exception of the battery e Use only the Newport Model 1918 BAT battery e Use only the Newport Model 1918 PS external power supply
15. quotes together Example this string contains a single quote All characters within the two outer single quotes are considered part of the string It is an error if the string does not terminate with a single quote The string cannot contain the lt CR gt ASCII decimal 13 lt LF gt ASCII decimal 10 or End or Identify characters 3 lt string gt defined using no quotes Appendix A 12 2 All strings using this format must start with an alphabetic character A through Z a through z All other characters must be either alphabetic digit 0 through 9 or the _ character Any other character will delimit the string Some examples are shown below Sent this is a string Interpreted this lst string is 2nd string a 3rd string string 4th string Sent this isastring Interpreted this 1st string separator character isastring 2nd string Sent w cm Interpreted w st string ERROR unrecognized character cm 2nd string Definition of lt number gt The 1918 R recognizes four types as lt number gt thus any format may be used l lt number gt defined as floating point 2 lt number gt defined as binary 3 lt number gt defined as octal 4 lt number gt defined as hexadecimal Where necessary integers are converted to floating point numbers In all cases a number is terminated by any of the below characters lt NL gt lt EOI gt lt SPACE gt Any non valid
16. taking advantage of the 1918 R high flexibility in setting the proper filters for the measurement Generally the 0 5 HZ filter is used for CW Cont measurements However the 1918 R Optical Meter can measure the amplitude of AC signals down to 0 01Hz so the 0 5 HZ filter can be used for any modulating signal below 0 5 HZ The Digital Filter is a moving average filter that can be set at 10 100 1000 or 10000 measurements These values can be changed by the user If the digital filter is set on 10 the average value is computed on 10 measurements in a First In First Out FIFO fashion The Digital Filter helps the SNR the same way as the Analog Filter does With both filters on low level continuous signals can be measured with a high degree of accuracy The Analog Filter is always applied to the entire amplifier chain of the meter Therefore the user will see the detector signal filtered at the Analog Output BNC The Digital Filter is a digital signal processing filter and is only applied to the calculated measured values that are displayed on the meter screen While the displayed values may have both filters applied An Dg the 118 Principles of Operation 9 11 Analog Output can only have the Analog Filter applied to the signal Because of that the user may see a difference in the way the signal is filtered between the displayed values and the Analog Output values Common Measurement Errors The most common sources of optic
17. 99 uW In the middle of the bar graph the displayed number is the middle of the range Figure 50 Analog Bar The major ticks represent 10 of the range and the minor ticks represent 5 of the range If the Soft key labeled Show Max is selected the maximum value is retained and displayed in the bar graph with red color The red bar is updated with each measurement if the current measured value is larger than the largest of the previous measurements Besides the maximum value being displayed with a red bar the actual value is displayed above the bar graph where Max shows the value If the Soft key labeled Show Min is selected the minimum value is retained and displayed in the bar graph with green color The green bar is updated with each measurement if the current measured value is smaller than the smallest of the previous measurements Besides the minimum value being displayed with a green bar the actual value is displayed above the bar graph where Min shows the value The maximum and minimum bars can be reset with the Reset m M soft key 54 System Operation 4 12 3 For users who would like to fine adjust a maximum or a minimum the 1918 R offers the Auto Zoom function When the Auto Zoom soft key is pressed another bar appears above the Analog Bar The bar length is 2 of the Analog Bar It is a display of the region around the end of the analog bar Figure 51 Auto Zoom The Auto Zoom bar displa
18. Figure 55 Performing Basic Measurements Input Optical Pulse Energy Resultant Voltage vey Pulse from Thermopile Integrate Voltage to find Z A EW pay yma Figure 55 Measuring Laser Pulse Energy via a Thermopile in CW Integrate Mode E a A recommended procedure is e With an 818P High Power Detector connected to the meter turn the meter on Set the Mode to CW Continuous Set the Range to Auto and press the Lambda A key to set the measurement wavelength to the desired value Set Zero on and then change Mode to CW Integrate e Before the optical pulse arrives the display may reflect the integral of detector noise due to ambient temperature fluctuations e Trigger the laser pulse The display will display a new integrated energy measurement every second The readings will start decreasing rapidly after the first couple of measurements due to the decline in heat flow from the relatively slow thermopile detector e When the displayed reading drops again to the point of essentially displaying the detector s noise component the individual stored readings may be retrieved via the USB interface Summing these readings will yield the pulse energy NOTE This method works best if the integrated result of the pulse signal is much larger than the integral of the detector s noise component If the integrated result of the pulse is not much larger then error in the measurement will arise due to the unce
19. Instead it is the user responsibility to dispose of waste equipment according to the local laws The separate collection and recycling of the waste equipment at the time of disposal will help to conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment For information about where the user can drop off the waste equipment for recycling please contact your local Newport Corporation representative See Section 16 for instructions on how to disassemble the equipment for recycling purposes Control of Hazardous Substances RoHS Compliant Figure9 RoHS Compliant Symbol This label indicates the products comply with the EU Directive 2002 95 EC that restricts the content of six hazardous chemicals Warnings and Cautions The following are definitions of the Warnings Cautions and Notes that are used throughout this manual to call your attention to important information regarding your safety the safety and preservation of your equipment or an important tip WARNING Situation has the potential to cause bodily harm or death 18 Safety Precautions 1 2 1 CAUTION Situation has the potential to cause damage to property or equipment NOTE Additional information the user or operator should consider General Warnings Observe these general warnings when operating or servicing this equipment Heed all warnings on the unit and in the operating instructions
20. Microsoft Windows Server products you may be required to obtain a Client Access License for the DEVICE and or each such workstation or computing device Please refer to the end user license agreement for your Microsoft Window Server product for additional information e NOT FAULT TOLERANT THE SOFTWARE IS NOT FAULT TOLERANT NEWPORT HAS INDEPENDENTLY DETERMINED HOW TO USE THE SOFTWARE IN THE DEVICE AND MS HAS RELIED UPON NEWPORT TO CONDUCT SUFFICIENT TESTING TO DETERMINE THAT THE SOFTWARE IS SUITABLE FOR SUCH USE NO WARRANTIES FOR THE SOFTWARE The SOFTWARE is provided AS IS and with all faults THE ENTIRE RISK AS TO SATISFACTORY QUALITY PERFORMANCE ACCURACY AND EFFORT INCLUDING LACK OF NEGLIGENCE IS WITH YOU ALSO THERE IS NO WARRANTY AGAINST INTERFERENCE WITH YOUR ENJOYMENT OF THE SOFTWARE OR AGAINST INFRINGEMENT IF YOU HAVE RECEIVED ANY WARRANTIES REGARDING THE DEVICE OR THE SOFTWARE THOSE WARRANTIES DO NOT ORIGINATE FROM AND ARE NOT BINDING ON MS e No Liability for Certain Damages EXCEPT AS PROHIBITED BY LAW MS SHALL HAVE NO LIABILITY FOR ANY INDIRECT SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES ARISING FROM OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THE SOFTWARE THIS LIMITATION SHALL APPLY EVEN IF ANY REMEDY FAILS OF ITS ESSENTIAL PURPOSE IN NO EVENT SHALL MS BE LIABLE FOR ANY AMOUNT IN EXCESS OF U S TWO HUNDRED FIFTY DOLLARS U S 250 00 e Restricted Uses The SOFTWARE is not designed or intended for use or r
21. Related Commands PM ANALOGFILTER 80 Communication Command Reference 8 3 3 16 8 3 3 17 8 3 3 18 PM ANALOG IMP Description Analog output impedance select command Syntax PM ANALOG IMP value Remarks The PM ANALOG IMP command selects the analog output impedance Argument Value Output Impedance Value 0 50 Q 1 100 KQ 2 1 MQ Related Commands PM ANALOG IMP PM ANALOG IMP Description Analog output impedance query Syntax PM ANALOG IMP Remarks The PM ANALOG IMP query returns an integer indicating the present analog output impedance Argument Value Output Impedance Value 0 50Q 1 100 KQ 2 1 MQ Related Commands PM ANALOG IMP PM ANALOG OUT Description Analog output range select command Syntax PM ANALOG OUT range Remarks The PM ANALOG OUT command selects the analog output range Argument Value Max Output Range 0 1V 1 2V 2 5V 3 Reserved Related Commands PM ANALOG OUT Communication Command Reference 81 8 3 3 19 8 3 3 20 8 3 3 21 PM ANALOG OUT Description Analog output range query Syntax PM ANALOG OUT Remarks The PM ANALOG OUT query returns an integer indicating the present analog output range Response Value Max Output Range 0 1V 1 2V 2 5V 3 Reserved Related Commands PM ANALOG OUT PM ATT Description Attenuator enable command Syntax PM ATT enable Remarks Indicates whether or not the attenuator for the 818 Series power detector is on the detector Argument Type Descrip
22. System Operation 47 4 6 4 7 e Never Stop The system measures continuously e Soft Key The system stops measuring when a Soft Key is pressed This key appears on the main screen e Command The system stops measuring when an external command PM TRIG STOP Section 8 3 3 is sent via USB Value The system stops measuring when the measured signal crosses a user programmed value e Time The system stops measuring when a user programmed time passed between the Start event and the current measurement e Number of Samples The system stops measuring when a user programmed number of measurements passed between the Start event and the current measurement The Trigger Stop can also be set with an external command PM TRIG STOP Section 8 3 3 Wavelength Setting Newport detectors have a calibration module or internal memory which stores the Responsivity versus Wavelength Table If the Lambda key is pressed a wavelength screen is displayed with the most common values in nanometers nm see Figure 32 on page 41 The screen has two columns The left column displays the common wavelength values used in the industry while the right column has custom values When the user selects one of the predefined wavelengths in the left column the 1918 R looks up the wavelength in the responsivity table in the detector calibration module If that exact value is found the system will use the corresponding responsivity for that particul
23. aces Seneca e E EES 133 134 Deyice ETHOS 3 inen a ss i a a 134 14 Appendix C Legacy Commands Reference 136 15 Appendix D Sample Programs 138 15 1 Programming Sar ples yi cesssiesareswetienadadans onan eestieoa sec aneolaaiouncattes 138 15 27 Fab VIE Wei ves unas Suesec tet A E ERS 138 15 3 Microsoft Visual Basic i divcitenanine eiwadseaede 138 15 4 Microsoft Visual CH s seesessssessesessssessessreseessessresresseesresressee 138 15 5 Microsoft NE Punissirneen inssi a tte crate R 138 16 Appendix E Disassembly Instructions 140 16 1 Disassembly instructions sssssnsseseeeeessesesseosseesresresseessesressee 140 xiii Preface List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 Figure 38 Figure 39 Figure 40 Figure 41 Figure 42 Figure 43 General Warning or Caution Symbol ssesesssesssesesseesesssesseseess 15 Electrical Shock Symbol s ssenseesessseessesesssressrsseessessessessseesessressee 15 TUV M rka annae naaa aih 15 CB MATE nen a e e a ach yaa e E E 16 Alternating Voltage Symbol pocscncscxsseycacduedilas measaecthoaameuencandecen
24. address ERRors NONE Returns errors generated since the last query ERRSTR NONE Returns errors and their corresponding error text generated since the last query Table2 Root level Commands Queries Summary Tree level Commands Queries Summary Number of Name Parameters Function DISP BRIGHT 1 Sets the backlight level of the display and the keypad DISP BRIGHT NONE Returns the backlight level of the display and the keypad PM AC BackLight 1 Sets the inactive time duration for reducing the backlight level during AC operation PM AC BackLight NONE Returns the inactive time duration for reducing the backlight level during AC operation PM AC LEVEL 1 Sets the reduced backlight level following inactive time duration during AC operation PM AC LEVEL NONE Returns the reduced backlight level following inactive time duration during AC operation PM AC STANDBY 1 Sets the inactive time duration for going to standby during AC operation PM AC STANDBY NONE Returns the inactive time duration for going to standby during AC operation PM ANALOGFILTER 1 Sets the analog filter to desired value PM ANALOGFILTER NONE Returns the analog filter setting PM ANALOG IMP 1 Sets the analog output impedance to desired value PM ANALOG IMP NONE Returns the analog output impedance value PM ANALOG OUT 1 Sets the analog output range to desired level PM ANALOG OUT NONE Returns the analog output range PM ATT 1 Selects if the attenuator s calibration data is included for power calcu
25. agree that MS Microsoft Corporation and their affiliates may collect and use technical information gathered in any manner as part of product support services related to the SOFTWARE MS Microsoft Corporation and their affiliates may use this information solely to improve their products or to provide customized services or technologies to you MS Microsoft Corporation and their affiliates may disclose this information to others but not in a form that personally identifies you e Links to Third Party Sites You may link to third party sites through the use of the SOFTWARE The third party sites are not under the control of MS or Microsoft Corporation and MS or Microsoft are not responsible for the contents if any third party sites any links contained in third party sites or any changes or updates to third party sites MS or Microsoft Corporation is not responsible for webcasting or any other form of transmission received from any third party sites MS or Microsoft Corporation are providing these links to third party sites to you only as a convenience and the inclusion of any link does not imply an endorsement by MS or Microsoft Corporation of the third party site Notice Regarding Security To help protect against breaches of security and malicious software periodically back up your data and system information use security features such as firewalls and install and use security updates No Rental Commercial Hosting You may not rent lease lend
26. ate 22 2 3 2 Electrical Specifications icc cssceeaseetcadtsveutsvanvesentieedouns 23 2 4 Unpacking and Handlition 2 fiesta piso uti la eta caea enue 24 2 5 Inspection for Damage accicssscondecccsciteeciadanauerndsctaess 24 2 6 Available Options and Accessories cccceesseceteceeteeeteeeeeeeesees 25 Def Parts Listine a A a a ode that 25 2 8 Choosing and Preparing a Suitable Work Surface ee 26 2 9 Electrical REGuinements ncecdeusts sch seccms was lnnousnsiechtenvacnns 26 2 10 Battery and External Power Supply 0 ccceecceesceesseceteeeteeeeees 26 3 System Overview 29 3 1 Startup Procedure ins cco cetaaecasuicgan enie EE anata enseen 29 3 2 Front Panel Layout gcresssceciteteocee crtisccciecar at aa a S 29 3 2 1 Front Panel ElGments 4 c cssscinsiel eave AkGianauiles 29 3 2 2 Understanding the Main Screen cccceccesseeeteeeteeeees 30 33 COIS Panel Layout pertencen E auc E 30 Zl Side Panel Lay Outs enian inini nin a a aes 30 Preface Sa Rear Panel Lavoe cholate seis ce iiie a alias 32 3 4 1 Rear Panel Blements 4 csnivtascsmecciinanteieeseecitn 32 3 4 2 Kick Stand POSitons sax isccsicesdsad decks vesscasssaviealeacrecaldan daca 32 4 System Operation 35 4 1 Side Panel Power Switch and Indicators 0 0 0 0 cceeeeceesseeeteeees 35 414 Stand by Swithin an nn aa anda 35 AAD LED Indicators cnnan nia was 35 4 2 Front Panel Keys an occa ctoay tics uiceseeduuttedaters conalennecshouetieran
27. if attenuator data should or should not be used when calibrating the Optical Meter Gets the attenuator serial number Sets the Optical Meter ranging to manual or automatic Returns 1 if automatic Optical Meter ranging is selected Returns the calibration date of the detector Returns the temperature at which the calibration was performed Selects the Optical Meter channel to display and control Returns the Optical Meter channel currently selected Returns the model number of the detector Returns the serial number of the detector Set data store behavior select Return data store behavior select Clear data store Return data store count of items stored Set data store enable Return data store enable Return data store data 1 1 10 5 5 value range oldest 5 newest 5 Sets the size of the Data Store buffer Return the sizes of the Data Store buffer Set data store interval Return data store interval Saves the data store buffer to USB flash disk Set data store max size Return data store max size Return data store units Selects the filtering operation no filtering analog filter digital filter or analog and digital Legacy Commands ATTN n ATTN n ATTNSN n AUTO n AUTO n CALDATE n CALTEMP n DETMODEL n DETSN n DSBUF n DSBUF n DSCLR n DSCNT n DSE n DSE n DS _n SFREQ SFREQ DSSIZE_n DSSIZE_n DSUNITS_n FILTER_n Appendix B Name M FILTer M
28. number of samples acquired over a one second period and y is the RMS value NOTE This process assumes that ambient signals are not changing between the moments when the user zeros the display and when the measurement is made 64 Performing Basic Measurements This page is intentionally left blank 6 1 6 2 Software Application Overview The 1918 R has a USB connector on the side of the unit that is used to connect to a computer for use with this application RS 232 connection for this application is not supported Provided on the CD that comes with the unit is an installation for this software application it communicates with the 1918 R using the USB port The installation installs the USB drivers that are required to use USB communication The design of the software is to allow the user to remotely control basic functions of the instrument Connection Start the application which will detect and connect the attached Optical Meter The 1918 R Optical Meter has just one channel so channel B is grayed out S Newport Optical Power Meter Application 1918 C Eile Yiew Tools Help Channel A Channel B Connect Button Mode P P CONT Hon Mode DC CONT a iici 13 228 0 000 mw Range Ol1 2f3 4 5 3 B Range mma Auto Wavelength 800 nm Wavelength 1550 nm A Power ERR No Error 11 13 2006 4 18 PM Figure 56 Application front panel 66 Software Application 6 3 6 4
29. or provide commercial hosting services with the SOFTWARE to others Separation of Components The SOFTWARE is licensed as a single product Its component parts may not be separated for use on more than one computer Additional Software Services This EULA applies to updates supplements add on components product support services or Internet based services components Supplemental Components of the SOFTWARE that you may obtain from Newport MS Microsoft Corporation or their subsidiaries after the date you obtain your initial copy of the SOFTWARE unless you accept updated terms or another agreement governs If other terms are not provided along with such Supplemental Components and the Supplemental Components are provided to you by MS Microsoft Corporation or their subsidiaries then you will be licensed by such entity under the same terms and conditions of this EULA except that i MS Microsoft Corporation or their subsidiaries providing the Supplemental Components will be the licensor with respect to such Supplemental Components in lieu of Newport for the purposes of the EULA and ii TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW THE SUPPLEMENTAL COMPONENTS AND ANY IF ANY SUPPORT SERVICES RELATED TO THE SUPPLEMENTAL COMPONENTS ARE PROVIDED AS IS AND WITH ALL FAULTS ALL OTHER DISCLAIMERS LIMITATION OF DAMAGES AND SPECIAL PROVISIONS PROVIDED BELOW AND OR OTHERWISE WITH THE SOFTWARE SHALL APPLY TO SUCH SUPPLEMENTAL COMPONENTS MS Mic
30. s Auto Figure 24 Manual Range mode Mode Range Auto 400 nm 37 89 Hint Press Setup to enter measurement setup Config Manual _ Figure 25 Auto Range mode Figure 26 This screen is displayed after pressing the Config soft key 40 System Operation Mode The Mode key displays a screen as in Figure 27 Using Se Numeric i ingi Min Max bar Navigation Enter keys the user can CW Integrate Ahuoanasdis select different measurement modes Pk Pk Continuous Vertical chart Pk Pk Single or display modes according to his her application The ESC key cancels the selection and brings the instrument back to the main screen RMS Figure27 Mode selection screen Hold The Hold key toggles between holding the current measurement or running freely When in Hold mode the numeric display freezes and the upper left corner of the display reads Hold see Figure 28 400 nm The display starts running when the Hold key is pressed again The ESC Hint Press etup to enter measurement setup key has no effect on Hold status bo Statistics Figure28 Measurement is on hold Filter The Filter key allows the user to apply Analog or Digital Filters or both to the detector signal This key brings a screen as in Figure 29 The Soft keys are reconfigured for the filter selection Counting from left to right the first key applies only the Analog filter to the detector signal the second applies only t
31. sashes a eae asia tentah aaa ont ee tet 40 Measurement is on hold ai caccvenstvch ack a ceonecateudes hacseucuc ye oheseceuntes 40 Filter sel cti n SCHEIN Snr ea ir irei aE aata 40 Filter configuration sereen s sseesesseesseessesessressesrtssressessrssressesst 41 Digital Filter editing 0eeeeseeseeseeesseseessressessreseessessrssresseeseesressee 41 Wavelengths sereen ocita a E E E 41 Zero S lection seeroniee ninnan a ia e AE 42 Measurement Settings screen ssssesseseseseessreseessessrsseesseesresressee 42 Accessing the Power Mangement sereen sssssesessssessresesseese 45 Power Mangement Settings screen sesessessessssseessrssessresresressee 45 Accessing the Trigger Setup screen seseessssessseeserssressessresressesse 46 Predefined color schemess cicisacccis wagnce een vinenrdeeateien 48 DE CID SE Tei a aaa gto ova a Salsas 145 aoe ve oes oes ease ae 48 System Settings SCreen excise e EEEE R EEEE 48 ADOUt SCHOEN iniiai aaa a aaia 49 Statistics Sereen orea riaa a E a 49 Graph Sere n testes e r ERA R allie alee 50 xiv Preface Figure 44 Math feld reae a a A E a aan 51 Figure 45 Math configuration SCreeti iccsssdcsescsvasivesdssncecvinevetstadebeacvousevetese 51 Figure 46 M as rement Settings innsent asiera iate inaint 52 Figure 47 Correction SettiNE Sie i a E i S 52 Figure 48 Mode selection sereen s essseseesssseseesesseesesstsrestsseserssseesesseseesessese 52 Figure 49 WMG
32. the equipment and personal injury or death T V Mark Figure3 T V Mark The presence of the T V mark indicates that it has been designed tested and certified as complying with the safety requirements in conjunction with the issuance of this mark 16 Safety Precautions European Union CE Mark Figure 4 CE Mark The presence of the CE Mark on Newport Corporation equipment means that it has been designed tested and certified as complying with all applicable European Union CE regulations and recommendations Alternating voltage symbol rw Figure 5 Alternating Voltage Symbol This international symbol implies an alternating voltage or current Figure 6 Stand by Symbol Stand by The Stand by Symbol in the figure above represents a power switch position This symbol represents a Stand by condition in which some circuitry is still on In the case of the 1918 R Optical Power Meter in the Stand by position the charging circuit is still on while the main processing circuit is off Frame or Chassis Figure 7 Frame or Chassis Terminal Symbol The symbol in the figure above appears on the 1918 R Optical Meter This symbol identifies the frame or chassis terminal Safety Precautions 17 1 1 8 1 1 9 1 2 Waste Electrical and Electronic Equipment WEEE Figure 8 WEEE Directive Symbol This symbol on the product or on its packaging indicates that this product must not be disposed of with regular waste
33. while properly removing the influence of ambient light and other drift effects e With a 918D also 818 XX lower power detectors with proper adapters or 818P Series Detector connected to the meter turn the meter on Press the Mode key and then select CW Continuous with the Navigation keys Use the ESC key to return to the Main screen Set Range to Auto and press the Lambda A key to set the measurement wavelength to the desired value e Cover or otherwise block the light source being measured and then press the Zero key to turn the Offset on This effectively removes any background signal from subsequent measurements e Uncover the source so that it illuminates the detector and note the displayed value This reading is the optical power observed by the detector due to the source Performing Basic Measurements 59 5 4 5 5 This process assumes that the ambient signal is not changing between the time when the Zero key is pressed and when the measurement is made The user should remember that if he she can see the detector active area as he she moves around then the detector registers this as a changing ambient DC signal e For the 918D series detectors also 818 XX lower power detectors with proper adapters you can decide whether to use the attenuator for your measurement or deactivate or physically remove on 818 low power series the attenuator a For very low power measurements below uW range in various ambient light
34. 114 9 10 1 Detector Calibration and Uncertainty ee 114 9 10 2 Quantum Detector Temperature Effects 114 9 10 3 Thermopile Detector Temperature Effects 115 9 10 4 Energy Detector Temperature Effects 0 0 eee 116 9 10 5 Ambient and Stray Light isi3 cis csvset cearadstiecttacteanciss 116 9 10 6 Signal FTC PAN Oa d sc cance eotin ta irer atetve dered ate delasuneteastcaatcees 117 9 11 Common Measurement Errors cccacs co rcenes ccteats wishes setae eaten 118 10 Troubleshooting 120 10 1 Power Supply Problems ciiesisshea ep bdocoundshea nek ei pebPorekaees 120 xii Preface 10 2 Analog Output Problems ws 4 5 lt uuae tiated eaieadeads 121 10 3 Questions and Answers e3 iss leaiivieae tad saw deeds 121 11 Maintenance and Service 124 11 Enclosure C Ieanin tse o isu ni Soc liueceuiea nse Wace seen avate 124 11 2 Battery Pack Replacement ec cecceecceseceeteeceeceseeeeeeenseees 124 11 35 WP ATS PALS re Senie eenei fees be ER A AT E EA OR ai 125 11 4 Obtaining Service naninira E R 126 Iis o Service Formans ene aa eL eS ae R E a 127 12 Appendix A Syntax and Definitions 128 12 1 Definition of lt string gt ssesessssessesesessessessresressessrssresseeseesressee 128 12 2 Definition of lt number gt sesessessesesessessessresressessessreseesrrssesse 129 13 Appendix B Error Messages 132 13 1 Tntrod ctiom iinsert aain aranana inaia 132 13 2 Command ENOS osrin ae a de A 132 13 3 Exec tion ET OTS ress
35. 1918 BAT No equivalent Use only Newport battery External Power 1918 PS Cincon Electronics TR36A2423A03 Supply Power Cord 1918 PSC Qualtek Electronics 223021 01 or equivalent 8 ft max SPT 2 18 AWG 7A Nema 1 ISP to IEC 60320K7 cord Battery 90000198 No equivalent Compartment Cover Kickstand Assembly 45344 01 No equivalent Table 7 Spare Parts Obtaining Service The 1918 R Optical Meter contains no user serviceable parts To obtain information regarding factory service contact Newport Corporation or your Newport representative Please have the following information available 1 Instrument model number on the rear panel 2 Instrument serial number on rear panel 3 Description of the problem If the instrument is to be returned to Newport Corporation you will be given a Return Number which you should reference in your shipping documents Please fill out a copy of the service form located on the following page and have the information ready when contacting Newport Corporation Return the completed service form with the instrument Maintenance and Service 11 5 Service Form GYD Newport Corporation U S A Office 800 222 6440 FAX 949 253 1479 Newport Name Return Authorization Please obtain RA prior to return of item Company Please obtain RA prior to return of item Address Date Country Phone Number P O Number FAX Number Item s Being Returned Mo
36. Enter keys Mode CW Cont tange Auto A 400 nm 37 89 Hint Press Setup to enter measurement setup Stati Math Figure 20 Main screen Measurement Settings Wavelength 670 Detector 818P 001 12 Range 0 113 Sun S N 173952 Range type Auto Det temp No Therm Attenuator Off Responsivity 1 959E 1 Analog filter Ref val 0 0010 Sun Digital filter ff Offset 0 0000 Sun Units 5 Mode 1 1310 cm Figure 21 Measurement Settings screen Refer to Section 4 3 for more information about the measurement settings 38 System Operation 4 2 2 4 2 3 4 2 4 4 2 5 Esc Key The Esc key Figure 18 and Figure 19 is used to cancel the current action When in a secondary screen or menu it will close the current screen or menu and the instrument will return to the main screen Figure 20 Navigation and Selection Keys Navigation through and selection of data in the display is done with the top right group of four arrows keys and with the Setup Enter key Figure 19 If the instrument is in Setup mode or in any configuration screens pressing the arrow keys will select different setup modes as displayed by the current screen Soft Keys Below the screen are a group of four keys Figure 22 Their function varies depending on the measurement mode or the setup screen They are designed to provide context sensitive functionality to the user The label displayed above each key indicates their function
37. Figure 22 Soft keys Dedicated Keys Six dedicated function keys are at the bottom right portion of the front panel Figure 23 Each of these keys can be used for quick access to the given function R M l l ange ode Hold Filter Zero Figure 23 Dedicated keys System Operation 39 Range Pressing this key reconfigures the Soft keys at the bottom of the screen as in Figure 24 From this screen the user has two options e One is to toggle Auto Manual Range mode This is accomplished by pressing the left most Soft key If the meter current configuration is Manual mode the left most Soft key is labeled Auto to allow the user to change the Range selection in Auto Range Mode This can be seen in Figure 24 where the range is 1 000 W indicating a manual mode If the instrument is in Auto Range Mode the left most key is labeled Manual The user may return to the main screen by pressing the ESC key see Figure 25 e The other option is to press the right most Soft key which is labeled Config This action displays the Range Configuration screen Here the user can select a certain range or even Auto Range with the Navigation Enter keys The number of ranges depends on the detector used see Section 2 3 2 Once a range is selected the instrument returns to the main screen While in Range Configuration screen the user may cancel the selection by hitting the ESC key Hint Press Setup to enter measurement
38. IN GING L GCIs PLAY a eset ics rte anana ar ae 53 Figure 50 Analog Bar sss saciss cons cioseceecipenaeheentenctaeaaev apse ean aero 53 Figure 51 PRTC OO Ug Sete reise ss es ae a ts adi sates wear ated Aad atasee sens Seon es 54 Figure 52 Analog Needle display iniri aces nee sates 54 Figure 53 Vertical chart with 10 measurements per line eee eeeeeeeeeeeeees 55 Figure 54 Vertical chart with 1 measurement per line 0 eee eeeeeeteeeeeeeee 55 Figure 55 Measuring Laser Pulse Energy via a Thermopile in CW Integrate Mode a a a a A tA 5 62 Figure 56 Application front panel ssseseeeseesseeseeseesseeseesresseesseserssressessessees 65 Figure 57 Application Advanced Options Configuration Tab 0 66 Figure 58 1918 R Optical Meter Analog Signal Flow Diagram 107 Figure 59 Thermopile Signals exhibit 1 to 10 second time constants 110 Figure 60 Typical Newport Energy Detector Signal Waveform 111 Figure 61 Negative Baseline Voltage o1c i csscsasiaivesdacssaiecsevbarnetaytsavitagoectecss 111 Figure 62 Time Varying Signal Measurements ccccescceeeceeseeesseeeseeees 112 Figure 63 Integrated Energy Via a Trapezoid Approximation 112 Figure 64 Measuring Laser Pulse Energy with a Thermopile 113 Figure 65 Battery Replacement A sscakeuceneeesusiane du Sena ceosiens eles 125 Figure 66 Disassembled 1918 R Optical Meter ccccccesceeeeeeseeet
39. If the battery is extremely discharged the PWR LED may remain blinking for up to 30 minutes while the battery is pre charged 2 Ifitis not lit 2 1 Verify that the external power supply is connected to AC power 2 2 Verify that the external power supply connector is fully mated with the connector on the instrument 2 3 Verify that the battery is properly installed 3 If itis solid red the battery is charging Troubleshooting 121 10 2 10 3 Allow the unit to charge for at least three hours 4 If itis solid green the battery is fully charged 4 Short battery life 1 Allow battery to fully charge 2 Use the various power saving modes of the instrument 3 Disconnect any device s connected to the USB Host interface connector Analog Output Problems Problem Solution 1 There is no AC signal at Check if the 0 5 Hz Analog Filter is on the analog output Questions and Answers Q I am trying to update the firmware but my USB flash drive is not working I don t see any light on the memory stick A The USB flash drive needs to be WinCE compatible WinCE is the operating system of 1918C power meter Q Is the detector hot swappable A Yes you can swap the detector without having to turn off the power meter Q Is it possible to write the measurement data into Spreadsheet A Yes you can plug in a USB flash drive into the power meter an
40. Lambda M Lambda M MAX Lambda M MAX Power M MIN Lambda M MODE M Power P P P P P P P P P P PM RANge PM RANge PM RESPonsivity PM RUN M RUN M STAT MAX M STAT MEAN M STAT MIN M STAT MAXMIN M STAT SDEViation M Temp P P P P P P P PM TRIG EXTernal PM TRIG EXTernal PM TRIG EDGE PM TRIG EDGE PM TRIG HOLDoff PM TRIG HOLDoff PM UNITs PM UNITs P P P P P P M REF VALue M REF VALue M REF STOre M ZEROSTOre M ZEROVALue M ZEROVALue TEC T Number of Parameters NONE ib Zizi m m ni Z Z Z m m Z E E E NONE NONE 1 6 Z gt Z p Z Z Z Z wmm mm m4 6 Z Z t O IE ZST E Z A Z T Z zall ZIZI Z Z E E E E E E E E Legacy Commands FILTER n Function Returns the filtering operation no filtering analog filter digital filter or analog and digital Poem ee eal 2 nanometers Returns current range s maximum readable power Returns the shortest calibrated wavelength in D eg ee ee MODE EY Selects the gain stage when making readings with the detector head within a range from 0 to 5 with zero RANGE n being the highest Returns an integer indicating the current range Disables or enables the acquisition of data Returns the present acquisition mode RANGE n RES RUN_n gt ie ala alg O S218 s Ris
41. NDBY PM BAT LEVEL Communication Command Reference 85 8 3 3 30 8 3 3 31 8 3 3 32 PM BAT STANDBY Description Syntax Remarks Argument Value Inactive time period for putting the instrument in standby mode during battery operation PM BAT STANDBY The PM BAT STANDBY query returns an integer indicating the present inactive time period for putting the instrument in standby mode during battery operation Value Inactive Time Period 0 1 min 1 5 min 2 30 min 3 2 hours 4 NEVER Related Commands PM BAT STANDBY PM BAT LEVEL PM CALDATE Description Syntax Remarks For example Response Date Detector calibration date query PM CALDATE The PM CALDATE query returns the calibration date of the detector 21JUN1999 Type Description string DDMMMYYYYY PM CALTEMP Description Syntax Remarks Response temperature Temperature at which detector was calibrated query PM CALTEMP The PM CALTEMP query returns the temperature degrees Celsius at which the detector was calibrated When no detector is present no detector is returned Type Description float Returns the temperature at which the detector was calibrated 86 Communication Command Reference 8 3 3 33 8 3 3 34 8 3 3 35 PM CORR Description Syntax Remarks Argument valuel value2 value3 Power measurement correction settings PM CORR value value2 value3 The PM CORR command sets the pow
42. RIG STATE Description This command sets the trigger state Syntax PM TRIG STATE lt option gt Parameters The parameter lt option gt is of type lt number gt and is an integer 0 or 1 Argument Value Description option 0 Trigger is armed The system waits for a trigger start event to occur in order to make a measurement 1 System is triggered and at least one measurement occurred Related Commands PM TRIG STATE PM TRIG STATE Description Trigger STATE Query Communication Command Reference 105 8 3 3 94 8 3 3 95 Syntax PM TRIG STATE Parameters None Function This query returns the TRIGGER STATE condition Related Commands PM TRIG STATE PM UNITs Description Units select Syntax PM UNITS units Remarks The PM UNITS command selects the units for readings Argument Value Description units 0 Amps 1 Volts 2 Watts 3 Watts cm 4 Joules 5 Joules em 6 dBm 7 10 Reserved 11 Sun Related Commands PM MODE Note The UNITs selection depends on the detector used Refer to Table 1 for the relationship between the detector type and units PM UNITs Description Units query Syntax PM UNITS Remarks The PM UNITS query returns an integer indicating the units selected Response Value Description units 0 Amps 1 Volts 2 Watts 3 Watts cm 4 Joules 5 Joules cm 6 dBm 7 10 Reserved 11 Sun 106 Communication Command Reference 8 3 3 96 8 3 3 97 8 3 3 98 Related Commands PM UNITS No
43. Ter Selects the filtering operation no filtering analog filter digital filter or analog and digital PM FILTer NONE Returns the filtering operation no filtering analog filter digital filter or analog and digital PM Lambda PM Lambda PM MAX Lambda PM MAX Power PM MIN Lambda PM MIN Power PM MEAS TIMEOUT PM MEAS TIMEOUT PM MODE PM MODE NONE Returns the currently selected acquisition mode 96 PM Power NONE Returns the power in the selected units 9G PM PWS NONE Returns the power with status 9 Uie head within a range from 0 to 6 with zero being the highest PM RANge Returns an integer indicating the current range 98 PM REF VALue 1 Sets the user reference value for use in relative or dB readings 98 72 Communication Command Reference Number of Page Name Parameters epogien No PM REF VALue NONE Returns the user reference value 98 PM REF STOre NONE Sets the user reference value for use in relative or dB readings 98 as the present reading PM RESPonsivity NONE Gets the responsivity currently used for making power 99 calculations PM RUN 1 Disables or enables the acquisition of data 99 PM RUN NONE Returns the present acquisition mode 99 PM SATLEVEL 1 Set saturation current density or power level 100 PM SATLEVEL NONE Query saturation current density or power level 100 PM SPOTSIZE 1 Sets the detector spot size 100 PM SPOTSIZE NONE Returns the detector spot siz
44. al measurement error are listed in Table 6 below Other common errors are discussed in the preceding subsections of Measurement Considerations Type of Error What should be done Radiometry Check that all of the light is actually hitting the detector Ambient light Check that any ambient light was ZEROed before the measurement was made Wavelength calibration Check that the calibration factor for the measurement wavelength is properly set Detector saturation or Check that the optical power density remains below damage the detector s saturation or damage Table 6 Common Measurement Errors Principles of Operation 119 This page is intentionally left blank 10 10 1 Troubleshooting Power Supply Problems Problem Solution 1 The unit does not turn on when battery powered 1 Use the external power supply to operate the unit and recharge the battery 2 Verify that the USB Host interface is not connected to a shorted cable or device Verify that the battery is properly installed 2 The unit does not turn on when powered from the external power supply 1 Verify that the external power supply is connected to AC power 2 Verify that the external power supply connector is fully mated with the connector on the instrument 3 The battery does not charge Check the PWR LED 1 Ifitis blinking verify that the unit is operating within the correct temperature range
45. ar wavelength If the value is not found the system will calculate the responsivity using interpolation The right column in the Wavelength screen gives the user the option to set custom wavelengths To do so with the Navigation keys bring the cursor on top of one of the numbers The rightmost Soft key becomes Edit Value Hit this key to edit the custom number A white cursor appears on the first digit Press the Up Down navigation keys to change the number and the Left Right keys to move to the next digit When finished hit Enter The new custom wavelength will be stored Press Esc to return to the main screen Display Color In a laboratory environment and especially when one uses protective eyewear it may be desirable to change the meter display color to 48 System Operation accommodate the eyewear color The instrument has predefined color schemes that can be changed any time Figure 38 IE Math a Negative black and white screen Mode CW Cont Range Auto 400 nm Offset 37 892 uw 21337 Hint Press Setup to enter measurement setup E Sees Math b Positive black and white screen c Red screen 2 1397 d Green screen e Blue screen Analog Mode CW Cont Range Auto 400 nm iset 37 692 yw 2 135 Hint Press Setup to enter f Color Blue screen Figure 38 Predefined color schemes To change the display colors first press the Enter Setup key This will bring the Se
46. ary gt Where B mandatory binary number header lt binary gt binary digits 0 s or 1 s Appendix A Example All numbers below represent the decimal value 129 B 10000001 b010000001 b 10000001 3 lt number gt defined as octal The 1918 R recognizes unsigned octal numbers in the range 0 to 65535 decimal or 0 to 177777 octal Octal numbers are represented using digits from 0 to 7 An octal number has the following format Q lt octal gt Where Q mandatory octal number header lt octal gt octal digits 0 to 7 Example All numbers below represent the decimal value 129 Q201 q0201 q201 4 lt number gt defined as hexadecimal The 1918 R recognizes unsigned hexadecimal numbers in the range 0 to 65535 decimal or 0 to FFFF hexadecimal Hexadecimal numbers are represented using the digits 0 9 and the characters A F A hexadecimal number has the following format H lt hexadecimal gt Where H mandatory octal number header lt hexadecimal gt hexadecimal digits 0 9 and A F Example All numbers below represent the decimal value 127 H7f H007F h7f 13 13 1 13 2 Appendix B Error Messages Introduction The communication errors can be retrieved with the following commands ERR or ERRSTR The descriptions of the returned errors are detailed in the next sections Command Errors Command Errors are associated with the conversion of the data received into the commands and t
47. ation to other instruments are simplified with the inclusion of LabVIEW drivers tools to develop in the NET environment and a high speed software utility that fully utilized the optical meter s ability to sample at 250 kHz and transfer data via a Full Speed USB interface 11 Mbps 2 2 Calibration Calibration of the optical meter is done at the factory by defining a slope and offset for all ranges as determined for each detector type Newport recommends annual factory re calibration to ensure the continued accuracy of optical meter measurements Please refer to the Maintenance and Troubleshooting section for contact information for re calibration of your optical meter 2 3 Specifications 2 3 1 Physical Specifications Dimensions Weight Enclosure Connectors Power Display Display Update Rate Operating Environment Storage Environment Altitude Installation Category Pollution Degree Use Location i Charging battery up to 35 C 5 4 x 7 6 x 2 4 inch 137 x 193 x 61 mm max 2 3 lb Plastic molded case with a kick stand Optical Detector 15 Pin D Sub Analog Output 3 5 mm Jack USB A Host mini B USB Device DC Input 2 1 mm Power Jack 90 264 VAC 50 60 Hz 33 Watts with 1918 EXT PS External Power Supply Graphical LCD 4 VGA 4 inch diagonal up to 20 Hz for selected graphical modes 5 C to 40 C lt 70 RH non condensing 20 C to 60 C lt 90 RH non condensing lt 3000m I 2 Ind
48. ax PM FILT Remarks The PM FILT query returns an integer indicating the present filter mode Response Value Description Filter type 0 No filtering 1 Analog filter Communication Command Reference 93 8 3 3 56 8 3 3 57 8 3 3 58 2 Digital filter 3 Analog and Digital filter Related Commands PM FILT PM Lambda Description Wavelength set command Syntax PM Lambda value Remarks The PM Lambda command selects the wavelength to use when calculating power The value must fall within the calibrated wavelength of the detector Argument Type Description Value int Wavelength in nanometers nm Related Commands PM Lambda PM MAX Lambda PM MIN Lambda PM Lambda Description Wavelength query Syntax PM Lambda Remarks The PM Lambda query returns the selected wavelength in nanometers This is the wavelength used to look up the responsivity from the calibration data Response Type Description Wavelength int Wavelength in nanometers nm Related Commands PM Lambda PM MAX Lambda PM MIN Lambda PM MAX Lambda Description Maximum wavelength query Syntax PM MAX Lambda Remarks The PM MAX Lambda query returns the longest calibrated wavelength in nanometers If no detector is preset the max lambda for the last read detector is returned Response Type Description Wavelength int Wavelength in nanometers nm Related Commands PM MIN Lambda 94 Communication Command Reference 8 3 3 59 8 3 3 60
49. calibrates its detectors using secondary standards directly traceable to the United States National Institute of Science and Technology NIST to Great Britain s National Physical Laboratory NPL or to National Research Council NRC of Canada The details and uncertainty of the calibration procedure vary with each detector model but a detailed description of the calibration results is supplied with each individually calibrated detector In general detector calibration uncertainty varies from 1 to 8 and varies with wavelength Each detector will also have some variation in response over its surface Therefore for the most reproducible measurements light should illuminate the detector as uniformly as possible over 80 of the detector s active area CAUTION Avoid focusing a light source onto the detector surface Inaccurate readings and possible detector damage may result Consult the detector manual for saturation or damage thresholds NIST trace ability requires that detectors be recalibrated on one year intervals As individual detector responses change with time especially in the ultraviolet recalibration is necessary to assure confidence in the uncertainty of the measurement For the most reproducible measurements the same detector should always be used for measurements that are to be directly compared Quantum Detector Temperature Effects Semiconductor Newport Low Power detectors are affected by temperature At l
50. characters detected in any number received are considered an error in format and an error condition will be generated in the system A description of each type of lt number gt follows 1 lt number gt defined as floating point 130 Appendix A Any of the following characters as the first character of an ASCII sequence indicates that a number is being defined 0123456789 A floating point number is defined as follows 1 Optional sign This defines the sign of the number If missing positive is assumed 2 Optional 0 9 digits These digits define the integer portion of the mantissa 3 Optional decimal point This defines the end of the integer portion of the mantissa and indicates that the fractional portion of the mantissa follows 4 Optional 0 9 digits These digits define the fractional portion of the mantissa 5 Optional exponent indicator an ASCII E or e followed by a or optional followed by decimal digits Examples The numbers below all represent the value 1 2 1 2 1 2e0 01 2E 00000 120E 2 12el The numbers below all represent the value 1 2 1 2 1 2e 00 0001 2e 0 120e 2 12E1 2 lt number gt defined as binary The 1918 R recognizes unsigned binary numbers in the range of 0 to 65535 decimal or 0 to 1111111111111111 binary Binary numbers are represented using only the digits 0 and 1 A binary number has the following format B lt bin
51. could be taken in the existing range Users must set this timeout value to 250ms or larger than their pulse repetition rate in order to be able to perform measurements accurately Argument Type Description Value int Timeout value milliseconds Related Commands PM MEAS TIMEOUT PM MEAS TIMEOUT Description Measurement timeout query Syntax PM MEAS TIMEOUT Remarks The PM MEAS TIMEOUT query returns the selected measurement timeout value in milliseconds Response Type Description Timeout int measurement timeout in milliseconds Related Commands PM MEAS TIMEOUT PM MODE Description Acquisition mode select Syntax PM MODE mode Remarks The PM MODE command selects the acquisition mode for acquiring subsequent readings Argument Value Description Mode 0 DC Continuous 1 DC Single 2 Integrate 3 Peak to peak Continuous 4 Peak to peak Single 5 Pulse Continuous 6 Pulse Single 7 RMS Related Commands PM MODE Note The MODE selection depends on the detector used Refer to Table 1 for the relationship between the detector type and MODE 96 Communication Command Reference 8 3 3 65 8 3 3 66 8 3 3 67 PM MODE Description Acquisition mode query Syntax M MODE Remarks The PM MODE query returns an integer indicating the present acquisition mode Response Value Description Mode 0 DC Continuous 1 DC Single 2 Integrate 3 Peak to peak Continuous 4 Peak to peak Single 5 Pulse Continuous 6 Pulse Single 7 RMS Relate
52. d Commands DISP BRIGHT 8 3 2 2 DISP BRIGHT Description Display brightness query Syntax DISP BRIGHT Remarks The BRIGHT query returns the display brightness setting Response Type Description Communication Command Reference 73 Brightness int Display brightness in levels from 0 to 7 Related Commands DISP BRIGHT 74 Communication Command Reference 8 3 3 Optical Meter Commands 8 3 3 1 IDN Description Identification Query Syntax IDN Parameters None Function Remarks This query will cause the Optical Meter to return an identification string A Sa E ia Nee bs ae os ee ds ed NEWPORT XXXX vYYY mm dd yy SNZZZZ Examples NEWPORT 1918 R v2 0 0 11 07 06 SN0001 8 3 3 2 RCL Description Recall Configuration Settings Syntax RCL bin Remarks The RCL command restores the power meter to the setup state saved in its non volatile flash memory Argument Value Description bin 0 Reserved LIS Valid configuration settings Related Commands SAV 8 3 3 3 SAV Description Save Configuration Settings Syntax SAV bin Remarks The SAV command saves the present state of the power meter in its non volatile flash memory A particular state is then recalled using the RCL command If any one of these parameters are changed the present state of the power meter will automatically be saved in configuration setting 1 When the power meter is reset the state of the meter defaults to configuration setting 1 The setup parameters saved inclu
53. d Commands PM MODE Note The UNITs selection depends on the detector used Refer to Table 1 for the relationship between the detector type and units PM Power Description Power query Syntax PM P Remarks The PM P query returns the power in the selected units Response Type Description power exp Exponential form i e 9 4689E 04 Related Commands PM UNITS PM PWS PM PWS Description Read with status query Syntax PM PWS Remarks The PM PWS query returns two values that are comma delimited The first value is the power reading and the second value is the status The status should be used to validate the reading The reading is in units corresponding to the units field in the status word Response Type Description Power reading exp Power in present units Status int A bitfield in hexadecimal defining the current channel status Communication Command Reference 97 8 3 3 68 NOTE The bitfield is defined as follows Bits 10 7 Channel Units See PM UNITS Bits 6 4 Channel Range See PM RANge Bit 3 Detector Present Bit 2 Channel range change status Indicates if a measurement has been taken while the unit is ranging Bit 1 Detector Saturated reserved follows bit 0 Bit 0 Channel overrange Indicates that the current measurement is overrange for the current channel range Related Commands PM MODE Example If the query returns the following values 1 862153E 004 118 then the Power reading is 1 862153E 004 and t
54. d save the data from the Statistics screen Q Is it possible to use a third party detector with the 1918 R Optical Meter A It may be possible for some measurements by purchasing a special adaptor Contact Newport Corporation for availability and details 122 Troubleshooting Q I would like to change the configuration back to the factory default setting How can I do that A Turn off the Power Meter Hold down both ZERO and HOLD buttons and turn on the Power Meter A message window appears Choose YES or NO for reset by using the left right arrow keys and press enter Q The display shows some noise and fluctuation when I measure my CW light source Any suggestions A Turn on the analog digital filter Check whether the meter and detector calibration is up to date Q Can I measure peak power or energy of a single pulse with a Newport low power detector 918D etc and 1918 R A No There is no energy or peak power mode measurement with the 1918 R when using a low power detector Troubleshooting 123 This page is intentionally left blank 11 Maintenance and Service CAUTION There are no user serviceable parts inside the 1918 R Optical Meter Work performed by persons not authorized by Newport Corporation will void the warranty Calibration accuracy is warranted for a period of 1 year After 1 year the unit should be returned to Newport Corporation for recalibration and NIST traceability re cer
55. d value This reading is the peak to peak optical power observed by the detector Accurate peak to peak power measurements can be made for pulse repetition rates up to 20 kHz Power Ratio and Power Reference measurements This section describes how to use the mathematical functions in the Optical Meter to obtain a power or signal comparison to a previously saved value The readout can be displayed as a linear ratio a percentage or in dB Refer to Section 4 10 for information on setting the reference values 60 Performing Basic Measurements 5 6 e Example 1 In order to select dB ratio versus a stored reference value a While in the Math function screen select channel A by using the up or down arrow keys There will remain a black border around the highlighted selected channel as you leave the column for the next selection b Move to the next column by using the right arrow key and select dB option c Move to the last column by using the right arrow key and use the up or down keys to select Ref A d Press the Menu Enter key to accept the selections and exit the Math function screen e The result of Ch A Ref A in units of dB will appear in the designated window on the screen Example 2 In order to get the difference between channel A and a stored reference value a From the main screen of the meter select soft key labeled Math to enter the math function screen If you cannot see th
56. de Display brightness level USB address Communication Command Reference 75 8 3 3 4 8 3 3 5 Argument bin Color scheme Measurement display mode Custom wavelengths AC backlight level AC backlight power AC standby Battery backlight level Battery backlight power Battery standby Value Description 0 Reserved lto5 Valid configuration settings Related Commands RCL ADDRess Description Syntax Remarks Argument Value USB address command ADDRess value The ADDRess command sets the Optical Meter USB address After changing USB address the communication with the Optical Meter has to be re initialized Value Description 0 Reserved Ito 31 Valid USB address range Related Commands ADDRess ADDRess Description Syntax Remarks Response address USB address query ADDRess The ADDRess query returns the Optical Meter s USB address Value Description 0 Reserved Ito 31 Valid USB address range Related Commands ADDRess 76 Communication Command Reference 8 3 3 6 8 3 3 7 8 3 3 8 ERRors Description Syntax Remarks Response Error code Error query ERRors The ERRors query returns a single error number that has occurred since the last query This error is indicated by a number that corresponds to the type of error that occurred This command also clears the read error from the Error buffer Type Description int Error code number per Appendix B
57. del Serial Description Reason for return of goods please list any specific problems 12 12 1 Appendix A Syntax and Definitions Definition of lt string gt For convenience the 1918 R recognizes double quoted single quoted and unquoted strings with certain restrictions as detailed below Any of these forms may be used where a lt string gt parameter is required 1 lt string gt using double quotes this is a string 2 lt string gt using single quotes this is a string 3 lt string gt using no quotes thisisastring A description of each type of lt string follows 1 lt string gt defined using double quotes A double quote indicates that a string follows and the string is terminated by another double quote A double quote may be embedded within the string by using two double quotes together Example this string contains a double quote All characters within the two outer double quotes are considered part of the string It is an error if the string does not terminate with a double quote The string cannot contain the lt CR gt ASCII decimal 13 lt LF gt ASCII decimal 10 or End or Identify characters 2 lt string gt defined using single quotes This form is similar to double quoted string A single quote indicates that a string follows and the string is terminated by another single quote A single quote may be embedded within the string by using two single
58. divide the measurement value by the active area of the detector This calculation assumes that the entire active area of the detector is uniformly illuminated Per area measurements where the entire detector active area is not uniformly lit are not accurate The user must insure that these conditions are met before utilizing per area units or make measurement corrections accordingly Typical Detector Signals The flexibility of the 1918 R Optical Meter analog signal flow is required in order that it may properly measure the signals that various types of detectors make Basic optical power or energy measurements are related to a measured detector signal S in the following way S P or E R A Where R Detector responsivity at S Detector signal Semiconductor 918D 818 Series Low Power detectors provide a current signal The 1918 R is capable of 10 pA resolution in order to provide the highest sensitivity performance with these detectors 110 Principles of Operation 9 5 9 6 Thermopile 818P Series High Power detectors provide a small voltage signal The 1918 R is capable of 76 3 nV resolution in order to reach the sensitivity limits of thermopile detectors Pyroelectric 818E Series Energy detectors deliver a peak voltage signal The1918 R is capable of capturing 2 usec rise time voltage spikes so that it may be operated with the fastest of these detectors Thermopile Detector Signals Thermopile det
59. e At power up and RESET the 1918 R downloads information about the detector from the calibration module or the detector internal memory Based on the calibration module preprogrammed data the meter learns the set of operating states available to the detector The user then selects among the available operating states when using the meter Front panel control and the operating states of the 1918 R Optical Meter are discussed in Section 3 Analog Signal Flow The detector signals can follow many different paths through the 1918 R input amplifier chain A block diagram of analog signal flow is shown in Figure 58 The actual flow path depends upon the detector type and the mode of measurement f Ke Analog a se Output Input NK ae 2 m Programmable Voltage Amplifier 5 Hz Programmable Noise Filter Voltage Buffer Programmable Transimpedance Amplifier Peak K Detector TA ADC prm Baseline Detector Figure 58 1918 R Optical Meter Analog Signal Flow Diagram 108 Principles of Operation 9 3 The analog signal flow path is primarily determined by the responsivity units of the detector The numerator of these units indicates how the meter must be configured in order to obtain a calibrated optical measurement Analog signal flow is independent of whether single or continuous measurements are made Responsivity units and signal flows for the vari
60. e 100 PM STAT MAX NONE Returns statistics buffer maximum value 101 PM STAT MEAN NONE Returns statistics buffer mean value 101 PM STAT MIN NONE Returns statistics buffer minimum value 101 PM STAT MAXMIN NONE Returns statistics buffer maximum minimum value 101 PM STAT SDEViation NONE Returns statistics buffer standard deviation value 102 PM Temp NONE Returns the 918 detector s temperature in degrees Celsius 102 PM THERM PREDICT 1 Disables or enables thermopile prediction algorithm 102 PM THERM PREDICT NONE Returns the present thermopile prediction algorithm state 103 PM TRIG START 1 Set the optional start event 103 PM TRIG START NONE Returns optional start event 103 PM TRIG STOP 1 Set the optional stop event 103 PM TRIG STOP NONE Returns optional start event 104 PM TRIG STATE 1 Set the trigger state 104 PM TRIG STATE NONE Returns the trigger state 104 PM UNITs 1 Selects the units for readings 105 PM UNITs NONE Returns an integer indicating the selected units 105 PM ZEROSTOre NONE Sets the zeroing value with the present reading 106 PM ZEROVALue 1 Sets the zeroing value 106 PM ZEROVALue NONE Gets the zeroing value 106 Table 3 Tree Level Commands Queries Summary 8 3 2 Display Commands 8 3 2 1 DISP BRIGHT Description Display brightness command Syntax BRIGHT brightness Remarks The BRIGHT command controls the brightness of the instrument display Argument Type Description Brightness int Brightness in levels from 0 to 7 Relate
61. e 16 Stand by Symbol ennienni enr iii n ia a a aa 16 Frame or Chassis Terminal Symbol ssssseesseseesseessessssreessesessee 16 WEEE Directive Symbol ssessesseessessesseossessesseessessseseesseossesresseo 17 RoHS Compliant Symbol seesessseesseseesssessessrssressessrsseesseeseesressee 17 Locations of labels on the rear panel eeeeceesceeeteceeeeeeeeeeeees 19 1918 R Optical Meter hard case tu onevts esis cn Gp cclatenssicssatavets 25 Rear panel with the battery cover removed ccceseeeeeeeseeeees 27 Fr nt Panel Lay Out casrscjuicssazisastaatcaseangsmtsardtostadogiaredsdacdtaemapieeds 29 Side Partie Isa yout 5icc scuss ccs tates God aedaatehte corgadatecen a 31 BGS ar ATIC ote cis rece Goracetsenat esata e A N tees 32 Kickstand in the first angled position ssesseeseessesseeseesseeseeseessee 33 Power Switch isnie o neii i dts e e aE iaa 35 Front Panel KEYS ieiti ant an nRa AEREA 36 Navigation Selection and Setup Enter keys ccccccesseeeseeeeeees 37 Main sereen acro orat ea T ncatints chin REA ERA 37 Measurement Settings screen ssseeseeseseseessesseessessresresseeseesressee 37 Softkey S hennan ia a a a a Agee teas Ate eee 38 Dedicated Kys enee ire a a a e 38 Manual Range mode ssssessseseesesssesseserssressessrssressessresresseeseesressee 39 Auto Range modennionienern inaen a ates a 39 This screen is displayed after pressing the Config soft key 39 Mode SclectionsCreeti
62. e in the detector calibration module or detector internal memory The available data are the detector model number Detector the detector serial number S N the detector temperature Det temp if the detector has an internal temperature sensor and the detector responsivity Responsivity System Operation 45 4 4 Power Management The Power Management Settings 0 screen is used to select the 818P 001 12 instrument s power savings behavior i 173952 Det temp No Therm Reducing the intensity of the LCD vlan fl Responsivity i A ae Analog filter Display backlight significantly Digital filter reduces the instrument s power consumption and thereby increases the time the instrument can be operated while powered from its internal battery Power consumption is further Figure 35 Accessing the Power reduced when the instrument is in its Mangement screen Standby mode The Power Management Settings screen can be accessed from the Measurement Settings screen Figure 35 by pressing the Power soft key The Power Management screen is shown in Figure 36 The left column settings are applicable while the instrument is operating on battery power The right column settings are applicable when the instrument is powered via the external power Figure 36 Power Mangement Settings supply screen By default the LCD Display Backlight is set for full maximum intensity After a selected period of time without input from the
63. e label Math press the ESC key b Use the direction keys to highlight channel A in the first column c Using the direction keys navigate to the column symbol in the center d Using the direction key move the final column such that Ref A is highlighted e Press the Menu Enter key to retain the settings and exit the screen at the same time f The result of Ch A Ref A will be displayed in the designated window of the main display screen Pulse Energy Measurements 818E Detectors This section describes the procedure for making basic optical pulse energy measurements e With an 818E Energy Detector connected to the meter turn the meter on Set the Mode to Pulse Continuous Set the Range to Manual Mode and press the Lambda A key to set the measurement wavelength to the desired value e Illuminate the detector and note the displayed value as the meter measures each laser pulse These readings represent the energies of the incident laser pulses The meter will display the last pulse energy measured until a new pulse arrives e Accurate measurements can be made for pulse repetition rates up to 10 kHz depending on the limitation of the specific detector in use of course Performing Basic Measurements 61 5 7 5 8 Signal Integration Measurements 918D or 818P Detectors This section describes the procedure for making a basic signal integration measurement while properly removing the influenc
64. e of ambient light and other drift effects The 1918 R begins and ends the signal integration every second e With a 918D or 818P Detector connected to the meter turn the meter on Set the Mode to CW Continuous Set the Range to Auto and press the Lambda A key to set the measurement wavelength to the desired value e Cover or otherwise block the light source being measured turn Zero on and then set the Mode to CW Integrate Immediately upon entering the integration mode the meter will begin to acquire and integrate data The display value may reflect the integration of noise due to ambient temperature fluctuations when using the 818P detectors or light fluctuations when using the 918D detectors e Uncover or trigger the source The displayed value should now reflect the detector signal integration value NOTE This process assumes that ambient signals are not changing between the moments when the user zeros the display and when the measurement is made Measuring Laser Pulse Energy with an 818P Thermopile Detector Single Shot This application makes use of the 1918 R CW Integrate mode see Section 5 7 above When an optical pulse with energy E A is incident on a thermopile 818P Series a voltage signal is generated at the detector input as the heat pulse flows out to the cooling fins The sum of a series of integrated signals each one second long resulting from this heat pulse is a measure of the optical pulse energy see
65. ecaution can result in severe injury e Have a qualified electrician verify the wall socket that will be used is properly polarized and properly grounded Battery and External Power Supply CAUTION The battery needs to be charged for at least 8 hours before using the optical meter without the external power supply The 1918 R Optical Meter is shipped from the factory with the battery removed from the unit Install the battery before plugging the external power supply and before turning on the unit To install the battery first remove the battery compartment cover from the back of the unit Connect the 5 pin battery connector to the corresponding connector inside the battery compartment Figure 12 The connector is keyed and can only be inserted in one direction so please be careful to properly align the connector pins Carefully fold the battery wires inside the battery General Information 27 compartment so that the wires will not put pressure on the battery compartment cover Close the cover and make sure it latches in place Battery Connector Battery Figure 12 Rear panel with the battery cover removed When the optical meter is turned on for the first time the battery needs to be charged for at least 4 hours The optical meter can be used while the battery is being charged It is recommended that the external power supply not be removed during the first 4 hours of charging CAUTION The bat
66. ector specific default mode depending on the detector used All Newport detectors have internal logic or calibration modules Based on the data stored in detectors the instrument knows to auto configure itself and sets up the mode range filter rate etc The user in the setup screen can change the detector specific default mode The basic measurement techniques for using the 1918 R are covered in the following sections Refer to Table 1 for a review of the 1918 R s functions and measurement capabilities Performing Basic Measurements R 3 D E a alle etector rea m Ww 5 Family Mode alala lasls ls lel l m e CW Continuous X X X X X X CW Single xX X X X X X Low CW Power Integrate X X X X 918D Pk Pk Series Continuous X X X X X X Pk Pk Single X X X X X X CW High Continuous X X X X X X X Power CW Single x x x x x x x 818P CW Series Integrate X X X X Pulse Energy Continuous X X X X X 818E Pulse Series Single xX xX X X X Table 1 Available Measurement Modes and Valid Units The following instructions assume familiarity with the meter s functions They also include steps to incorporate background correction and assume that the experimental setup under fills and does not saturate or damage the detector CW Measurements with 918D or 818P Detectors This section describes the procedure for making basic optical power measurements
67. ectors respond with a voltage signal that slowly changes in incident optical power The time constant of most thermopile detectors is on the order of 1 to 10 seconds Input Optical Signal Thermopile Response Displayed Signal 1 sec 5 sec Figure 59 Thermopile Signals exhibit 1 to 10 second time constants Pulse Energy Detector Signals A Newport Energy detector will respond to a single radiant energy pulse with a voltage pulse at its BNC output This pulse exhibits a sharp voltage rise to a peak followed by slower voltage decay that undershoots zero volts before settling back to zero volts When a detector is operated within its proper limits the voltage difference from immediately before the sharp rise to the peak is linearly proportional to the radiant energy If a second pulse arrives before the undershoot rises back to zero volts the voltage rise from this pulse will start from an initial negative value At sufficient energy pulse repetition rates a negative baseline voltage will develop from which the voltage rise must now be measured to achieve accurate energy readings The 1918 R contains baseline capture circuitry that maintains its accuracy specifications over rep rates ranging from single pulse to 10 kHz Principles of Operation 111 9 7 0 8 0 6 VOLTS 0 4 0 0 02 0 04 0 06 0 08 0 10 TIME sec Figure 60 Typical Newport Energy Detector Signal Waveform An energy detector signal shar
68. ed at the top of the screen Pressing the Zoom soft key will zoom in the graph 2 times the previous zoom value Pressing the Zoom soft key will zoom out 4 times the previous zoom value The maximum graph value is displayed in the upper left corner of the display If the Cursor soft key is pressed a vertical line cursor is displayed The user can direct the cursor left or right with the Navigation Keys to read the measured values on the graph The current value is displayed in the upper right corner and marked on the screen with a red dot System Operation 51 4 10 4 11 Math Functions The Math function is displayed on the math field at the upper right LS ee lt corner Figure 44 To display the a Qi 76 414 uw 4 Math field the user selects the soft A 400 nm key labeled Math in the main screen This in turn displays the 3 8 5 2 math configuration screen a uW The Math function can be used to ER add subtract multiply or divide the lt Math current measurement Ch A witha reference Ref A in real time Once in the Math configuration screen the user can use the Navigation keys to build the mathematical expression From the first column the user can select the first variable in the expression from the second column the operator and from the third column the second variable When the selection was made the system returns to the main a screen after the Enter key was Figure45 Math configuration screen
69. eeeeeees 141 List of Tables Table 1 Available Measurement Modes and Valid Units eee 58 Table 2 Root level Commands Queries Summary ccecseeseeeeeeeeteeeeees 70 Table 3 Tree Level Commands Queries Summary ccccesseeeteeeseeeeees 72 Table 4 Analog Signal Flow Paths isc ssiccscsseccssteascctesccvensiacsdecvosseccessscincds 108 Table 5 Analog Output RanoeeP able cis scsseisaaccestesesdbavsandedeievacssanvtian 113 Table 6 Common Measurement BIrOrss lt lt sce0scacs saaceces cae teccceuccans seasteweeecdents 118 Table 7 Spare Pars feces teh oAess scacegs Wace a aaccsadeuceayieven desea rea 126 Table 8 Legacy Commands RelSrem C6 5 5 Gas viesssckshaeadesvansecaslvacdaaeae cease 137 1 1 1 1 1 1 1 2 1 1 3 Safety Precautions Definitions and Symbols The following terms and symbols are used in this documentation and also appear on the 1918 R Optical Meter where safety related issues occur General Warning or Caution Figure 1 General Warning or Caution Symbol The Exclamation Symbol in the figure above appears in Warning and Caution tables throughout this document This symbol designates an area where personal injury or damage to the equipment is possible Electric Shock Figure 2 Electrical Shock Symbol The Electrical Shock Symbol in the figure above appears throughout this manual This symbol indicates a hazard arising from dangerous voltage Any mishandling could result in irreparable damage to
70. environments you can elect to use the detector with no physical attenuator in the optical path This will increase the sensitivity and hence accuracy of the measurement b Incase of higher power measurement the attenuator should be used to avoid damage or saturation of the detector The attenuator use is recommended in mW to low Wattage range incident power Please refer to the specifications of the particular detector to make sure you do not exceed the saturation levels of the detector For the 918D series detectors with integrated non removable attenuators there is a switch built into the detector head sensing the position of the attenuator The Optical Meter will then automatically use proper calibration data for presence or absence of the attenuator in front of the photo diode For models such as 818 low power series detectors which have a removable attenuator there is no switch built into the detector head hence the user will have to manually select attenuator option status on the meter to obtain the proper power or signal readings Peak to Peak Power Measurements 918D Detectors This section describes the procedure for making basic optical peak to peak power measurements e With a918D Low Power Detector connected to the meter turn the meter on Set the Mode to Pk Pk Continuous Set Range to Auto and press the Lambda A key to set the measurement wavelength to the desired value e Illuminate the detector and note the displaye
71. er measurement correction settings These settings are used by the power meter to correct the actual power measurement The corrected power is calculated using the formula provided below Corrected Measurement Actual Measurement valuel value2 value3 Type Description float Multiplier 1 default 1 000 float Offset default 0 000 float Multiplier 2 default 1 000 Related Commands PM CORR PM Power PM DPower PM CORR Description Syntax Remarks Response valuel value2 value3 Power measurement correction settings query PM CORR The PM CORR command returns the power measurement correction settings These settings are used by the power meter to correct the actual power measurement The corrected power is calculated using the formula provided below Corrected Measurement Actual Measurement valuel value2 value3 Type Description float Multiplier 1 default 1 000 float Offset default 0 000 float Multiplier 2 default 1 000 Related Commands PM CORR PM Power PM DPower PM DETMODEL Description Syntax Detector model query PM DETMODEL Communication Command Reference 87 8 3 3 36 8 3 3 37 8 3 3 38 8 3 3 39 Remarks For example Response model PM DETSIZE Description Syntax Remarks Response Area PM DETSN Description Syntax Remarks For example Response serial number The PM DETMODEL query returns the
72. esadcanvoraasss 36 ADA SMP Enter Key Aces iianese sien lne a easly 36 ADD Ese CY isco nean a e ta aes Sd ee aaa aoe eia 38 4 2 3 Navigation and Selection KeyS cccccseesseeeteeeeeeeeees 38 424 Soft ROY Siessactoetiststiacatyants ate O E E easily 38 42 5 Dedicated Keys uenincon norni aariin E 38 4 3 Measurement Set U Sy nciir s ss easevscaadsadadalaraeanieandiwdedalen ego 42 4 3 1 Changing the Measurement Settings 0 0 0 eee 42 4 3 2 Detector Information ics seccusisucecss deduces vac seveterenieesetes 44 4A POWER Man aBOMENt anenee a a ati 45 AS Trigger Set p n nno a guna demandes 46 ASA TOET Sta e e a E E 46 4 5 2 Bb 84 cj Gay 0 6 eRe Pe n a a a a ree 46 4 6 Wavelength Setting cisciances daacevideainsauasiiviasana de cesunaae dees 47 Avy 1 Display Collate csc ctccststiemarigalat anderen nds ald A AAEE 47 48 USB Adress yest n e a E E nan son eas 49 AI Statisties aiite a A aur a TE E 49 AO Graphs 22a oeae a E E E E E O Thane 50 4 10 Math PUnCtions eiia a i ii aas 51 4 11 Measurement Correction Settings cccesceeseeeseeeseeeseeeeeees 51 4 127 Display Modes scnicsas cea aaainisngaMeibuiee eee ede 52 412 1 Numetio Displ ycssirennnrne nonn eaa 53 4 122 Analog Baraenn a a a S 53 AT Do Analog N edl nesoreipeni eas late tela eaten 54 4 124 Vertical Chartis cc s aat tet ealosdi sa nn a a a ai 55 4 13 Optical Meter Firmware Upgrade Procedure eeeeeeeees 55 5 Performin
73. esale in hazardous environments requiring fail safe performance such as in the operation of nuclear facilities aircraft navigation or communication systems air traffic control or other devices or systems in which a malfunction of the SOFTWARE would result in foreseeable risk of injury or death to the operator of the device or system or to others e Limitations on Reverse Engineering Decompilation and Disassembly You may not reverse engineer decompile or disassemble the SOFTWARE except and only to the extent that such activity is expressly permitted by applicable law notwithstanding this limitation SOFTWARE as a Component of the DEVICE transfer This license may not be shared transferred to or used concurrently on different computers The SOFTWARE is licensed with the DEVICE as a single integrated product and may only be used with the DEVICE If the SOFTWARE is not accompanied by a DEVICE you may not use the SOFTWARE You may permanently transfer all of your rights under this EULA only as part of a permanent sale or transfer of the DEVICE provided you retain no copies of the SOFTWARE If the SOFTWARE is an upgrade any transfer must also include all prior versions of the SOFTWARE This transfer must also include the Certificate of Authenticity label The transfer may not be an indirect transfer such as a consignment Prior to the transfer the end user receiving the SOFTWARE must agree to all the EULA terms e Consent to Use of Data You
74. etect the new firmware files and will ask if you want to download the files Press the Yes 56 System Operation softkey to start the upgrade process The Optical Meter will instruct you to restart once the upgrade is successful Restart the Optical Meter by turning it OFF and back ON The Optical Meter will restart running the new firmware New firmware files may be available either through the Newport web site http www newport com at the product page or through your local Newport application specialist 5 1 5 2 Performing Basic Measurements Introduction Many different types of optical measurements are possible using the 1918 R Optical Meter Most of these possible measurements are selected from within the MODE menu This chapter discusses these measurements Measurement Modes and Units The 1918 R provides a number of measurement modes for acquiring data At power on the meter checks the detector s calibration EEPROM to determine the available measurement modes supported by the detector Measurements can be displayed in various units The detector type and the measurement mode determine the set of units available at any given time Table 1 illustrates the measurement modes and units available for each detector family The measurement modes are grouped naturally into three categories CW Peak to Peak Pk Pk and Pulsed Each will be discussed in the sections below The 1918 R sets the measurement to a det
75. ettings are 1 minute 5 minutes 30 minutes 2 hours and never When Never is selected the instrument never enters Standby mode Trigger Setup The Trigger Setup screen can be Measurement Settings accessed from the Measurement Detector 818P 001 12 Settings Figure 37 Pressing the il sl Trigger soft key gives the user a few il Responsivity choices to setup the trigger according Ref val ff Offset to the measurement needs The 1918 R Series has an advanced Trigger set that allows the user to synchronize the measurements Synchronization can be achieved with F igure 37 Accessing the Trigger Setup Trigger Start and Trigger Stop which screen can be set both from the trigger setup screen or with external commands Num Digits Trigger Start The Trigger Start is an event that tells the system when to take a measurement or a group of measurements It can be set in different ways o Continuous The system is always triggered e Soft Key The system can be triggered with a Soft Key that appears in the main screen Command The system is triggered with an external command PM TRIG STATE Section 8 3 3 The Trigger Start can also be set with an external command PM TRIG START Section 8 3 3 Trigger Stop The Trigger Stop is an event that tells the system when to stop taking measurements In the case of a single measurement a trigger stop event arms the system for the next measurement It can be set in different ways
76. exploded version of the 1918 R For recycling purposes only the disassembly steps are as follows 1 Make sure the unit power cord is removed 2 Remove the battery 3 Remove any other cables detectors Analog Output monitor cables USB and ground cables 4 Remove all 4 screws on the rear panel 5 Remove the rear panel 6 Remove the screws and posts of each assembly and unplug each assembly from the unit Assembly 3 Side Plate Assembly 2 Assembly 1 Front Cover Rear Cover Battery Battery compartment cover Figure 66 Disassembled 1918 R Optical Meter End User License Agreement for Embedded Software Components You have acquired a device DEVICE that includes software licensed by Newport Corporation Newport from an affiliate of Microsoft Corporation MS Those installed software products of MS origin as well as associated media printed materials and online or electronic documentation SOFTWARE are protected by international intellectual property laws and treaties Manufacturer MS and its suppliers including Microsoft Corporation own the title copyright and other intellectual property rights in the SOFTWARE The SOFTWARE is licensed not sold All rights reserved This End User License Agreement EULA is valid and grants the end user rights ONLY if the SOFTWARE is genuine Certificate of Authenticity for the SOFTWARE is included For more information on ide
77. filter in CW Single acquisition mode each measurement is the average of the last 10 100 1000 10000 acquisitions independent of how old any of the measurements are Gain Gain processing accounts for the signal gain of the input amplifiers The output is the product of the digitized value and the amplifier gain Principles of Operation 109 9 4 Zero Offset Zero offset is active whenever the Offset annunciator is lit The zero offset output is equal to the input value less the zero reference value Responsivity Map s This process scales the input value in accordance with current calibration wavelength and the responsivity map downloaded from the detector calibration module The output of this process i e the measurement value is the digitized input value divided by the responsivity associated with the current calibration wavelength or the user defined calibration value Different responsivities are used depending upon if the attenuator is on as shown in the Setup Menu Units Correction Unit s correction adjusts a measurement value to account for the display units selected When the display units are equal to the detector signal units i e equal to the numerator of the responsivity units Table 1 the measurement value is not adjusted Otherwise the digitized value is adjusted to account for detector responsivity and or additional unit conversions such as W to W cm NOTE Per area unit conversions such as W to W cm
78. g Basic Measurements 57 XL Jotrod ctionna saaneen a a a a a E 57 5 2 Measurement Modes and Units 2 05 ine aes 57 5 3 CW Measurements with 918D or 818P Detectors 006 58 5 4 Peak to Peak Power Measurements 918D Detectors 59 5 5 Power Ratio and Power Reference measurements 0 4 59 5 6 Pulse Energy Measurements 818E Detectors eceeeeeee 60 5 7 Signal Integration Measurements 918D or 818P Detectors 61 5 8 Measuring Laser Pulse Energy with an 818P Thermopile Detector Single SHOE ec cceastndecencaesgcuandeeceassnaes chads tdudaauicheaouees 61 5 9 RMS Measurements srai jase a vacaelgudd nds ien a ecbekades 63 xi Preface 6 Software Application 65 6L AOOVET VAC WE Mesake taraa ccs Pad sauata dy aaa a ea a barda aagi 65 6 2 Connection nisin ieie EE ia a E E RES 65 Gide Genetal Usage seis reac ueateseava ate eencaaneamcdeciaacd gu a as 66 GA Menu Structure scecek easiest eaa a detectable 66 7 Computer Interfacing 67 7 1 General Guidelines 131 5 c lt tse Rerseapncegeetetearescneemenuaras acento mes 67 7 2 Computer Interface Terminology 22 0 sca vecsisleeaieatiaastaaeeaaes 67 7 2 1 lt gt Delimiting Punctuation vi cccdss nes veusncacdvencnst 67 Po2 SCR Carriage Ret lfisssisiss neironi onis inn 67 Taa SLF Dne Ce egs oad sist ceca a ee a nE 67 7 2 4 SEIMICOIONS 25 23 oases thsadanshseaas in ateases gecaneer east saeam es 67 7 2 5 lt number
79. gt Numerical LY pes asicaprntzaciscess acacdensanducere 68 7 2 6 lt string gt String Typesw cnier dais Aueeiadia Anes 68 7 3 USB Commi Catron es ssceak gaat icp atacas ye odedssaeear ec coeeas ies baceee eset 68 8 Communication Command Reference 69 8 1 1918 R Optical Meter Remote Interface Commands 69 8 2 Command OV enviGw sc tsaxeaieanactanzasniededs caneResbaldiasyansotiavandacsdatse 69 8 3 Optical Meter Command Description eeeceeceeeseeeteeeeeees 70 8 3 1 Command Glossary nach aecsacstetetes aie coieealcchactndcnacssneauaes 70 8 3 2 Display Commands si cnsleds 2dk bane eebeatenl eaeeinaet T2 8 3 3 Optical Meter Commands ssssessseeseesesseeseesesseessssees 74 9 Principles of Operation 107 Deli TtOGU Ct Otscsi saan ae E R e peels 107 92 Analog Signal FloW sia iis ss istedenscnsetwiarsdgr diane terwudsdes ave 107 9 3 Digitized Signal PlOW sess classics ni eieuninheacnieshanmns 108 9 4 Typical Detector Signals i siscasy assassins bie 109 9 5 Thermopile Detector Signals cccccsssccsssessrcesncesstsessnseeaes 110 9 6 Pulse Energy Detector Signals icin tetiwiaccdeasattaiisdncsnaies 110 9 7 Peak to Peak Photodiode Detector Signals eee 111 9 8 Integration of Detector Signals ceecceceeesceeseeeteeeteeeeees 112 O 9 Analog Outputcuscieyclatcser sends css ccivece st vases E aaty 113 9 10 Measurement Considerations cccceccceseceseceeeeeeteeeseeeteeeees
80. gth Range Range Type Beam Attenuator Analog Filter selection Digital Filter selection Measurement Units Measurement Mode Spot Size and the Number of Digits displayed Wavelength Selection With the Navigation Selection keys bring the cursor on top of the Wavelength field Hit the Enter key A drop down menu appears with the custom wavelength values see Section 4 6 for more information about the wavelength custom values Select the desired wavelength and hit Enter Range Selection and Range Type Rng type The Range field has dual functionality System Operation 43 4 3 1 3 4 3 1 4 4 3 1 5 4 3 1 6 One is to display the current selected range whether it was selected by the user in Manual Range Mode or by the system in Auto Range Mode The other is to allow the user to change the range With the Navigation Selection keys bring the cursor on top of the Range field Hit the Enter key A drop down menu appears with the available ranges in the selected units Select the desired range and hit Enter If the unit was in Auto Range mode once a range is selected here it will switch the system to Manual Range Mode To bring it back to Auto Range Mode navigate to Range Type Rng type and change the range to Auto Range Mode Also the user has another option to bring the Optical Meter back into the Auto Range Mode This can be done from the default screen where the user can change the Range to Auto Range Mode with
81. he Digital Filter and the third applies both filters When the filters are selected the corresponding label above the soft key has a highlighted background and the filter name is displayed in the upper left corner Figure 29 Filter selection screen System Operation 41 The fourth Soft key is used for filter configuration When selected a screen as in Figure 30 is displayed Using the Navigation Enter keys the user can select the filter of choice If the Enter key is not pressed the ESC key cancels the selection and brings the instrument back to the main screen If the Enter key is pressed a selection is made and the instrument goes back to the main screen The digital filter values can be edited Figure 31 When one of the digital filter values is selected the right most soft key becomes Edit Value Pressing this Soft key displays a cursor on top of the first digit of the edited filter value The Navigation Up Down keys modify the digit while the Left Right keys move the cursor to the next digit When finished press the Enter key to store the new digital filter value and press Enter again to select the new value and exit the Filter configuration screen Lambda A Key The Lambda A key brings the Default and Custom Wavelengths screen Figure 32 This screen allows the user to choose a default wavelength for the measurement in progress or to choose a custom wavelength See Section 4 6 for more details
82. he Status is the hex value 118 or the binary value 00100011000b Taking into consideration the bitfield definition the status is decoded as follows Bits Binary Decimal Function 10 7 0010 2 units Watts 6 4 001 1 range 3 1 1 detector present 2 0 0 instrument not ranging during measurement 1 reserved 0 0 0 measurement is not over range PM RANge Description Range select Syntax PM RANge range Remarks The PM RANge command selects the gain stage when making readings from the detector head The range of this value depends on the detector being used Response Type Description range int Values range from 0 to 5 for Thermopile and Energy detectors or 0 to 4 for Photodiodes see Section 2 3 2 Related Commands PM RANge PM AUTO 98 Communication Command Reference 8 3 3 69 8 3 3 70 8 3 3 71 8 3 3 72 PM RANge Description Range query Syntax PM RANge Remarks The PM RANge query returns an integer that indicates the present range The range of this value depends on the detector being used Response Value Description range 0 Values range from 0 to 5 for Thermopile and Energy detectors or 0 to 4 for Photodiodes see Section 2 3 2 Related Commands PM RANge PM AUTO PM REF VALue Description Reference Value Define Syntax PM REF VALue lt val gt Parameters The parameter lt val gt is of type lt number gt Function This command provides a means
83. heir parameters parsing Incorrect syntax incorrect parameters and improper command format will generate these errors Any command error will cause the Command Error bit bit 5 in the Standard Event Status Byte to be set 104 Numeric Type Not Defined Generated during the parsing of a number and an undefined number type is encountered 106 Digit Expected Generated during the parsing of a number and the parser encounters a non number when a number is expected 107 Digit Not Expected Generated during the parsing of a number and the parser encounters a number when a different character is expected 115 Identifier Not Valid Generated when a parameter is not valid or not properly formed 116 Syntax Error Occurs when an error in command structure or parameter type is detected Some typical causes are e Using a number as a command mnemonic Using the wrong parameter type Using ASCII characters outside of a string constant that are not defined by the command language syntax e Missing or too many parameters The above list in not exhaustive but does give the basic idea of what to look for Appendix B 13 3 126 Too Many Or Few Arguments Generated when command arguments are missing or too many Execution Errors Execution Errors are associated with the interpretation of the converted commands and parameters received Incorrect parameter values and numerical range errors are types of execution errors Any execut
84. here are two programmable filters that can be used individually or together to condition the detector signal the Analog Filter and the Digital Filter The Analog Filter is a hardware based programmable low pass filer The user can select the following settings 0 5 HZ 1kHz 12 5kHz and 250kHz This flexibility is offered to the user to improve the measurement precision for different detectors It is well known that white noise has large spectrum The noise level increases with bandwidth The higher the noise the higher the minimum signal that can be measured The quality of the measurement can be linked to the signal to noise ratio SNR the higher the SNR the better the measurement precision of very small signals In order to increase the SNR the user may choose to cut the bandwidth of the power meter depending on the detector signal For example if the detector is modulated with a sine wave of 800Hz the user may choose to set the Analog filter to 1kHz to increase the SNR and be able to measure very small signals Also cutting the bandwidth at 1kHz does not affect the measurement However if the modulation frequency is 800Hz but the signal is a square the user may opt to cut the bandwidth higher at 12 5kHz to let the signal harmonics be unfiltered and minimize the distortion Of course in this case the noise in the system will increase with the square root of the bandwidth The user needs to asses the tradeoffs in his measurement
85. ical Support Contacts viicc3 csscevtetdsts dis escctcadanatieiadaweiens 6 vii Table of Contents irantan irane ne aet aietara asiaate aa asnata ix Listof FiguresSenennennanra naa a a a tN xiii List OF TABLES 15503 pesca dened m e e a E EE E at xiv 1 Safety Precautions 15 1 1 Definitions and Symbols i335 ss0 3 ccdsscsavecseaessaieavesteedadcaeds 15 1 1 1 General Warning or Caution s sesssseseesssessessessressessrssees 15 1 1 2 Electri Sho k ice pennn ana e a a iS 15 ta TUV Mikee g a ee ce a Meal 15 1 1 4 European Union CE Mark cccesccsstscseccssrcescesenseees 16 1 1 5 Alternating voltage symbol cccvucnienceavaasccestes 16 TVG SAN Dy ot cs nacaceen force r once EN 16 Vole Framer Chassis sree ntori ira a a taen ee a 16 1 1 8 Waste Electrical and Electronic Equipment WEEE 17 1 1 9 Control of Hazardous Substances ceeceeceesseeeteeees 17 1 2 Warnings and Cautions is s 4s soa yiiessn Sere aera aces 17 1 2 1 General Warnings 5 iaievtssscstsiathexts cidtea Wshsistapttenassisacteaates 18 152 2 General Ca tionS nreo nieee an e a tava eons 18 1 3 Eo ati n of Lab l tcc c cscit scien hassel th arcane teee taut alles hat areas og 19 WDA REAR PANG bicar ee Meelis n a a a ates 19 2 General Information 21 2 Tntrod ttiom nee a a e aai 21 22 Calibra on ae a e A sack ook asters A R O E AOE 22 2 3 Sp cifications srnce a aan E dese EREA 22 2 3 1 Physical Specifications once siscaiisssiscpciieenas tated
86. ing Related Commands PM AUTO PM RANG PM BAT BackLight Description Inactive time period for reducing the backlight level during battery operation Syntax PM BAT BackLight value Remarks If the instrument is on battery power its display backlight will be reduced to a pre specified level following a period of inactivity specified using this command The instrument Communication Command Reference 83 8 3 3 26 8 3 3 27 Argument Value is considered to be inactive if either the keys on the front panel are not being pressed or if there is no communication with a host PC over USB interface Value Inactive Time Period 0 1 min 1 5 min 2 30 min 3 2 hours 4 Always Related Commands PM BAT BackLight PM BAT LEVEL PM BAT BackLight Description Syntax Remarks Argument Value Inactive time period for reducing the backlight level during battery operation PM BAT BackLight The PM BAT BackLight query returns an integer indicating the present inactive time period for reducing the backlight level during battery operation Value Inactive Time Period 0 1 min 1 5 min 2 30 min 3 2 hours 4 Always Related Commands PM BAT BackLight PM BAT LEVEL PM BAT LEVEL Description Syntax Remarks Argument Value Display backlight level following an inactive time period during battery operation PM BAT LEVEL value If the instrument is on battery power its display backlight will be reduced foll
87. ion This command sets the size of the buffer used for data storing NOTE The data buffer is cleared automatically when this command is used and all previously stored data will be gone Related Commands PM DS SIZE PM DS INTerval PM DS INTerval PM DS SIZE Description Data Store Buffer Size Query Syntax PM DS SIZE Parameters None Function This query returns the data store buffer size Returns lt size gt is of type lt number gt and represents an integer of the range 1 to 250000 Related Commands PM DS SIZE PM DS INTerval PM DS INTerval 92 Communication Command Reference 8 3 3 53 8 3 3 54 8 3 3 55 PM DS UNITs Description Data store units query Syntax PM DS UNITS Remarks The PM DS UNITS query returns an integer indicating the units selected Response Value Description units 0 Amps 1 Volts 2 Watts 3 Watts cm 4 Joules 5 Joules cm 6 dBm 7 10 Reserved 11 Sun Related Commands PM UNITS PM UNITS Note The UNITs selection depends on the detector used Refer to Table 1 for the relationship between the detector type and units PM FiLTer Description Filter select command Syntax PM FILT filter type Remarks The PM FILT command select the filtering operation to be performed on power readings Argument Value Description Filter type 0 No filtering 1 Analog filter 2 Digital filter 3 Analog and Digital filter Related Commands PM FILT PM FILTer Description Filter type query Synt
88. ion error will cause the Execution Error bit bit 4 in the Standard Event Status Byte to be set 1 Out of memory This error is caused by an internal program fault and may be followed by an automatic instrument reset 201 Value Out Of Range This error will occur if a parameter is out of a valid range or not in the set of valid parameters for a given command 214 Exceeds Maximum Length Generated when the command exceeds the maximum command length Try shortening the command string 217 No saved information in recalled bin Generated when the user attempts to recall a bin which has no previous stored data 301 Query Error The Query Error occurs when the instrument is in the midst of transmitting a message Over a communication bus and the instrument exits remote mode 303 Input Buffer Overflow Error generated when the system parser runs out of space during reception of command It may occur if commands are not terminated correctly Input buffer is 1 024 characters long 304 Output Buffer Overflow Error generated when the system parser runs out of space for query results It may occur if query results in too much data to be returned in a single response or if multiple command queries are issued but not read Output buffer is 4 096 characters long 305 Parser Buffer Overflow Error generated when the system parser runs out of space for commands A command is received into the input buffer then transferred to the
89. is intentionally left blank 4 1 4 1 1 4 1 2 4 1 2 1 System Operation Side Panel Power Switch and Indicators Stand by Switch D Figure 17 Power Switch The Stand by switch is located on the side panel and is a toggle button It turns the unit on or in stand by When in stand by the unit is not fully turned off In stand by the 1918 R Optical Meter will charge the battery while all the other functions are off LED Indicators The instrument has two LED indicators one for Power and one for Status Both of these are located on the Side Panel Power Indicator The Power Indicator shows the current state of the battery charging circuit when the external power supply is powered and connected to the instrument This indicator operates even when the unit is turned OFF This indicator is not lit when the external power supply is disconnected from the instrument or is not connected to an external AC power source NOTE The power indicator is not lit when the unit is operating from its internal battery When external power is applied there are four states for this indicator Unlit Flashing Red Continuous Red and Continuous Green The Power Indicator will be Continuously Green when the battery charge circuitry detects a fully charged battery The Power Indicator will be Continuously Red while the battery is being charged 36 System Operation 4 1 2 2 4 2 4 2 1 The Power Indicator will be Flashi
90. isplay statistics Statistics for the measurement in progress Vie 26 91 uw From the main screen press the Max 34 545 Soft key labeled Statistics The of ROSAS araa Statisti is displ d in Range 201 40 nw tatistics screen is displayed as Mean 34 405 pw Figure 42 Std Dev 41 486 nw The left column shows the statistics current setup The Statistics function has two modes i Fixed and Continuous Figure 42 Statistics screen When in Fixed mode the Statistics engine calculates the minimum Min maximum Max Range Mean Standard Deviation Std Dev for a fixed number of samples and displays them in the right column The number of samples is displayed in the left column on the Samples line As Figure 42 shows the number of samples is 10000 with a time interval between samples of 100 us This means that the statistics values are calculated over 1 second interval If the Mode is Fixed at the end of the 10000 samples the statistics values are cleared and the calculation starts again with the next measurement The user can change the Mode with the Navigation keys When the Enter key is pressed a drop down menu allows the user to select Fixed or Continuous Mode By using the Up and Down navigation keys followed by Enter the user can change the Mode to Continuous Pressing Clear Stats soft key in Continuous mode clears current statistics 50 System Operation 4 9 1 enables data collection and starts computation of new s
91. istics buffer Returns lt mxmn gt lt mxmn gt is of type lt number gt in exponent notation 8 3 3 84 PM STAT SDEViation Description Statistics Standard Deviation Query Syntax PM STAT SDEViation Parameters None Function This query returns the standard deviation of the readings in the statistics buffer Returns lt stddev gt lt stddev gt is of type lt number gt in exponent notation 8 3 3 85 PM Temp Description 918 detectors temperature query Syntax PM Temp Remarks The PM Temp query returns the 918 detector s temperature as a float in degrees Celsius Response Type Description temp float Detector temperature in degrees Celsius C Related Commands PM ATT 8 3 3 86 PM THERM PREDICT Description Syntax Remarks Argument Mode Thermopile prediction command PM THERM PREDICT mode The PM THERM PREDICT command disables or enables the thermopile prediction algorithm When this algorithm is enabled the instrument predicts the power measured by thermopile detector very accurately a few seconds faster than the natural response of the detector Value Description 0 Disable prediction algorithm 1 Enable prediction algorithm Related Commands PM THERM PREDICT Communication Command Reference 103 8 3 3 87 8 3 3 88 8 3 3 89 8 3 3 90 PM THERM PREDICT Description Thermopile prediction query Syntax PM THERM PREDICT Remarks The PM THERM PREDICT query returns the state of thermopile prediction algorithm
92. k Single Shot Pk Pk Single Pulse Mode Continuous Run Pulse Cont 44 System Operation 4 3 1 7 4 3 1 8 4 3 1 9 4 3 2 e Pulse Mode Single Shot Pulse Single e RMS Measurements RMS Refer to Section 5 Performing Basic Measurements for detailed information regarding these modes Spot Size This setting allows users to change the spot size The default spot size is set to be same as the detector size The spot size can be modified by navigating the cursor to this setting and pressing the Setup Enter key The value then becomes editable each digit in the value can be changed by pressing Up Down arrow keys and different digits can be selected by pressing Left Right arrow keys The desired value can be accepted by pressing Setup Enter key Number of Digits Setting The 1918 R displays a default 4 number of digits To change these settings bring the cursor on top of the Num Digits field Hit the Enter key A drop down menu appears with the option of 3 4 or 5 digits Select the desired number of digits and hit Enter Offset Field On the right column of the Measurement Settings the unit displays the Offset stored when the user hits the Zero dedicated key This value can be cleared or updated if the unit is in the default screen and Zero is pressed see Section 4 2 5 for more information Detector Information The Measurement Settings screen displays information about the detector used based on the data availabl
93. keypad or communications via the USB interfaces the instrument will enter its Reduced Backlight mode In this mode the instrument functions normally i e it is still capable of taking measurements but the backlight is dimmer The display will return to its normally bright intensity when any key on its keypad is actuated or when a command is received via the USB interface The Backlight Level can be changed from OFF to 100 in increments of 25 The Backlight Pwr settings are used to select the time from the last keypad actuation or USB command until the instrument enters Reduced Backlight mode The available settings are 1 minute 5 minutes 30 minutes 2 hours and Always When Always is selected the display is always at the maximum backlight intensity In Standby mode measurements are disabled and the LCD Display Backlight is completely turned OFF but the instrument will continue to monitor for keypad actuations and USB commands When either of these wake up events occurs the instrument will read the detector if the detector was not 46 System Operation 4 5 4 5 1 4 5 2 changed while the instrument was in Standby mode it will then revert to the user settings in effect when it entered Standby mode The Standby settings on the Power Management Settings screen are used to select the time from the last keypad actuation or USB command until the instrument enters Standby mode The available s
94. l Filter Disabled with External Trigger Digital filter must be disabled during external trigger mode 708 There is no new data for a statistics update No new data has been stored in the data store since the last statistics update 709 Statistics are not calculated while Data Store is running User attempted to compute statistics while data store was active Turn off data store and compute Appendix B This page is intentionally left blank 14 Appendix C Legacy Commands Reference Name DISP BRIGHT DISP BRIGHT DISP SCReen DISP SCReen PM ANALOG OUT PM ANALOG OUT PM ATT PM ATT PM ATTSN PM AUTO PM AUTO PM CALDATE PM CALTEMP M CHANnel M CHANnel M DETMODEL M DETSN M DS BUF fer M DS BUF fer M DS CLear M DS Count M DS ENable M DS ENable M DS GET M DS SIZE M DS SIZE M DS INTerval M DS INTerval M DS SAVEBUFER M DS SIZE M DS SIZE M DS UNITs M FILTer P P P P P P P P P P P P P P P P P P P P Number of Parameters Function Sets the backlight level of the display and the keypad Returns the backlight level of the display and the keypad Switches to the n screen display Returns displayed screen number 0 n a screen number 1 Main etc Sets the analog output range to the desired level Returns the analog output range Selects if the attenuator s calibration data is included for power calculation Returns setting
95. l power cord Meter Figure 11 1918 R Optical Meter hard case The following is a list of parts included in the hardcase Figure 11 with the 1918 R Optical Meter 1 A CD ROM containing the User s Manual Software Drivers and Utilities A PDF version of the manual can also be downloaded from the Newport website at www Newport com 2 Battery Pack 1918 BAT 26 General Information 2 8 2 9 2 10 3 External Power Supply 1918 PS and detachable power cord 1918 PSC If you are missing any of these items or have questions about the items you have received please contact Newport Corporation Choosing and Preparing a Suitable Work Surface The 1918 R Optical Meter may be placed on any reasonably firm table or bench during operation The kickstand can be rotated to two angles to improve visibility of the LCD display as needed Provide adequate distance between the 1918 R Optical Meter and adjacent walls for ventilation purposes Approximately 2 inch spacing for all surfaces is adequate Electrical Requirements Before attempting to power up the unit for the first time the following precautions must be followed e Ifthe power supply is equipped with a 3 prong plug connect the instrument to properly earth grounded 3 prong receptacle only WARNING If the power supply is equipped with a 3 prong plug connect the instrument to properly earth grounded 3 prong receptacles only Failure to observe this pr
96. labeled key the function it represents is currently disabled Annunciators loosely correspond to keypad keys which are used either alone or in combination with the navigation and selection keys to control annunciator functions Side Panel Layout Input Connectors The input connectors are on the side panel The 1918 R Optical Meter supports input from external detectors through a DB15 detector connector The external power supply is plugged in the DC INPUT connector Output Connectors The 1918 R Optical Meter has an analog output which enables direct monitoring of a detector through an oscilloscope or voltmeter Side Panel Layout The side panel is a brushed aluminum plate with input and output connectors a power switch and LED indicators Figure 14 e Stand by switch This is a push on push off button for turning the unit on or off e Ground Pin The user can connect the Optical Meter to an Earth Ground for sensitive measurements e 15 Pin D Sub Optical Detector Input 3 5 mm Jack Analog Output Mini USB Connector labeled USB PC This connector is used for sending remote commands to the Optical Meter from a PC The System Overview 31 connection to a computer is done via a USB cable Type A Male Connector to Type Mini B Male Connector e USB A connector labeled USB MEM This connector is used for saving the data on a USB Memory and for firmware upgrades Analog Out Stand by Switch Mini USB Connecto
97. lation Returns setting if attenuator data should or should not be used PME DON when calibrating the Optical Meter PM ATTSN NON Gets the attenuator serial number PM AUTO 1 Sets the Optical Meter ranging to manual or automatic PM AUTO NONE Returns 1 if automatic Optical Meter ranging is selected Page No 74 74 74 75 75 76 76 Page No 72 12 76 11 77 78 78 78 79 79 80 80 80 81 81 81 82 82 82 Communication Command Reference 71 Number of Page Name Parameters Function No during battery operation level during battery operation duration during battery operation duration during battery operation battery operation battery operation PM CALDATE Te performed PM CORR 3 Sets the power measurement correction settings 86 PM CORR NONE Power measurement correction settings query 86 PM DETMODEL NONE Returns the model number of the detector 86 PM DETSIZE PM DETSN PM DIGITALFILTER PM DIGITALFILTER NONE PM DPower PM DS BUF fer PM DS BUFfer PM DS Clear NONE Clear data store 8 PM DS Count NONE Returns data store count of items stored 89 PM DS Enable I Setdatastoreenable 8 PM DS Enable NONE Returnsdatastoreenable 8 newest 5 PM DS INTerval I Setdatastoreinterval O0 PM DS INTerval NONE Returns data store interval 0 PM DS SIZE PM DS SIZE PM DS UNITs Returns data store units PM FIL
98. m level e g 2x and the number of samples processed per chart line e g 10 Avg Figure 53 The chart has 100 lines each line having a white and red color When the system fills up a line it looks at 2x 1 Avg Peak 0 000 a number of samples defined by the number displayed below the chart Figure 54 Vertical chart with 1 measurement per line Figure 53 shows 100x 10 Avg which means that while painting a line the system looks at the previous 10 measurements It displays with white the minimum value in the 10 measurement list and with red the maximum value in the same list The user can change the number of measurements by selecting the Average soft key and then pressing the Right or Left Navigation keys to increase respectively decrease the number of measurements If one measurement is selected the chart color is white because the maximum and minimum per line are the same Figure 54 Due to one measurement display per line the chart speed increases If the Zoom soft key is pressed the user can zoom into the chart with the Up and Down Navigation keys 4 13 Optical Meter Firmware Upgrade Procedure Firmware Upgrade is an easy straight forward process Simply copy firmware files PM1918APP EXE and XMLFILEI XML to a WinCE compatible USB Flash Drive and then plug it into the USB connector on the front of the instrument Then wait a few seconds for the instrument to recognize the USB Flash Drive The Optical Meter will d
99. model number of the detector 818 SL Type Description string Detector model number Detector surface area PM DETSIZE The PM DETSIZE query returns the surface area of the detector in cm Type float Detector surface area Description Detector serial number query PM DETSN The PM DETSN query returns the serial number of the detector 0001 Type Description string Detector serial number PM DIGITALFILTER Description Syntax Remarks Argument Value Digital filter select command PM DIGITALFILTER value The PM DIGITALFILTER command specifies the digital filter setting Type Description int digital filter size between 0 and 10000 Related Commands PM DIGITALFILTER PM DIGITALFILTER Description Syntax Digital filter query PM DIGITALFILTER 88 Communication Command Reference 8 3 3 40 8 3 3 41 8 3 3 42 Remarks The PM DIGITALFILTER query returns the present digital filter setting Argument Type Description Value int digital filter size between 0 and 10000 Related Commands PM DIGITALFILTER PM DPower Description Detector power query Syntax PM DPower Remarks The PM DPower returns the actual power measurement This measurement does not include any correction settings specified using PM CORR command When the correction settings are set to default values the power measurement returned by this command is same as the measurement returned by PM P command
100. n Value float Spot size cm Related Commands PM SPOTSIZE PM DETSIZE PM SPOTSIZE Description Detector spot size query Syntax PM SPOTSIZE Communication Command Reference 101 8 3 3 80 8 3 3 81 8 3 3 82 8 3 3 83 Remarks Response Spot size The PM SPOTSIZE query returns the detector spot size in cm Type Description float detector spot size in cm Related Commands PM SPOTSIZE PM DETSIZE PM STAT MAX Description Syntax Parameters Function Returns Statistics Maximum Value Query PM STAT MAX None This query returns the maximum value in the statistics buffer lt max gt lt max gt is of type lt number gt in exponent notation PM STAT MEAN Description Statistics Mean Value Query Syntax PM STAT MEAN Parameters None Function This query returns the mean or average of all the values in the statistics buffer Returns lt mean gt lt mean gt is of type lt number gt in exponent notation PM STAT MIN Description Statistics Minimum Value Query Syntax PM STAT MIN Parameters None Function This query returns the minimum value in the statistics buffer Returns lt min gt lt min gt is of type lt number gt in exponent notation PM STAT MAXMIN Description Syntax Statistics Max Min Query PM STAT MAXMIN 102 Communication Command Reference Parameters None Function This query returns the difference between the maximum and minimum readings in the stat
101. ng Red after external power is applied and until the battery charge circuitry determines that the instrument s internal battery is safe to charge This may range from less than a second to several minutes depending on the initial state of the battery Even when external power is applied to the instrument the Power Indicator will not be lit when the charging circuitry detects a failed defective or missing battery It is acceptable to operate the unit without a battery using just the external supply Status Indicator The Status Indicator will switch every few seconds between Green and Unlit when the instrument is turned ON and is operating normally Front Panel Keys The front panel keys are organized in three groups see Figure 18 e Navigation Keys e Reconfigurable Keys also called Soft Keys e Escape ESC Key CX Rewpont Power Meter Model 1918 C Navigation Keys Escape Key gt Dedicated Keys Reconfigurable Soft Keys Figure 18 Front Panel keys Setup Enter Key The Setup Enter key is placed to the right of the display Figure 19 This key has dual functionality From the main screen Figure 20 press this key to display the Measurement Settings screen Figure 21 Also use this key while System Operation 37 any secondary menu is displayed to complete entering data or to exit the current secondary screen i gt L Setup D Enter 4 ow Esc Figure 19 Navigation Selection and Setup
102. ntifying whether your software is genuine please see http www microsoft com piracy howtotell IF YOU DO NOT AGREE TO THIS EULA DO NOT USE THE DEVICE OR COPY THE SOFTWARE INSTEAD PROMPTLY CONTACT NEWPORT FOR INSTRUCTIONS ON RETURN OF THE UNUSED DEVICES S FOR A REFUND ANY USE OF THE SOFTWARE INCLUDING BUT NOT LIMITED TO USE ON THE DEVICE WILL CONSTITUTE YOUR AGREEMENT TO THIS EULA OR RATIFICATION OF ANY PREVIOUS CONSENT GRANT OF SOFTWARE LICENSE This EULA grants you the following license You may use the SOFTWARE only on the DEVICE Restricted Functionality You are licensed to use the SOFTWARE to provide only the limited functionality specific tasks or processes for which the DEVICE has been designed and marketed by Newport This license specifically prohibits any other use of the software programs or functions or inclusion of additional software programs or functions that do not directly support the limited functionality on the DEVICE Notwithstanding the foregoing you may install or enable on a DEVICE systems utilities resource management or similar software solely for the purpose of administration performance enhancement and or preventive maintenance of the DEVICE e Ifyou use the DEVICE to access or utilize the services or functionality of Microsoft Windows Server products such as Microsoft Windows Server 2003 or use the DEVICE to permit workstation or computing devices to access or utilize the services or functionality of
103. nual Updates Dear Customer In an effort to keep the 1918 R Optical Meter optimized for your applications Newport will on occasion update existing and add new features to this instrument To utilize this new functionality will require an update to the instrument s firmware which can be easily accomplished by the user as described in this User Manual As required Newport will also generate a new version of this User Manual reflecting updates to the instrument Please check the Newport website www Newport com for newer versions of the firmware and the User Manual which can be downloaded as a PDF file Call your local Newport application specialist if you need support with locating or downloading these files Enjoy your new instrument Preface Warranty Newport Corporation warrants that this product will be free from defects in material and workmanship and will comply with Newport s published specifications at the time of sale for a period of one year from date of shipment If found to be defective during the warranty period the product will either be repaired or replaced at Newport s option To exercise this warranty write or call your local Newport office or representative or contact Newport headquarters in Irvine California You will be given prompt assistance and return instructions Send the product freight prepaid to the indicated service facility Repairs will be made and the instrument returned freight
104. od 0 1 min 1 5 min 2 30 min 3 2 hours 4 Always Related Commands PM AC BackLight PM AC LEVEL PM AC LEVEL Description Syntax Remarks Argument Value Display backlight level following an inactive time period during AC operation PM AC LEVEL value If the instrument is on AC power its display backlight will be reduced following a pre specified period of inactivity to the level specified using this command The instrument is considered to be inactive if either the keys on the front panel are not being pressed or if there is no communication with a host PC over USB interface Value Backlight Level 0 100 1 75 2 50 3 25 4 OFF Related Commands PM AC BackLight PM AC LEVEL 78 Communication Command Reference 8 3 3 11 8 3 3 12 8 3 3 13 PM AC LEVEL Description Syntax Remarks Argument Value Display backlight level following an inactive time period during AC operation PM AC LEVEL The PM AC LEVEL query returns an integer indicating the display backlight level following an inactive time period during AC operation Value Backlight Level 0 100 1 75 2 50 3 25 4 OFF Related Commands PM AC BackLight PM AC LEVEL PM AC STANDBY Description Syntax Remarks Argument Value Inactive time period for putting the instrument in standby mode during AC operation PM AC STANDBY value If the instrument is on AC power it will be put in standby mode foll
105. of directly storing a reference value to be used in linear and logarithmic dB relative measurements The units of this value are the current units being used by the instrument Related Commands PM REF STOre PM REF VALue PM REF VALue Description Reference Value Query Syntax PM REF VALue Parameters None Function This query returns the user defined reference value The units of this value are the current units being used by the instrument Returns lt refval gt lt refval gt is of type lt number gt Related Commands PM REF STOre PM REF VALue PM REF STOre Description Reference Value Store Communication Command Reference 99 8 3 3 73 8 3 3 74 8 3 3 75 Syntax PM REF STOre Parameters None Function This command takes the latest reading and stores it as a reference reading to be used when making relative linear and dB measurements The units of this value are the current units being used by the instrument Related Commands PM REF VALue PM REF VALue PM RESPonsivity Description Responsivity query Syntax PM RESP Remarks The PM RESP query returns the responsivity currently used in making power calculations Response Type Description Responsivity float Optical Meter responsivity Related Commands PM UNITS PM PWS PM RUN Description Run command Syntax PM RUN mode Remarks The PM RUN command disables or enables the acquisition of data Argument Value Description Mode 0 Stop 1 Run Rela
106. ong wavelengths quantum detectors typically lose sensitivity with increasing temperature Additionally detector dark current increases exponentially with temperature For silicon detectors dark current is generally on the order of a few picoamps at room temperature With uncooled germanium detectors however this dark current is on the order of a nanoamp or typically 1 000 to 10 000 times greater than silicon Observed Principles of Operation 115 9 10 3 dark current is often dominated by the interaction between the detector and a meter s amplifier and is typically larger than the theoretical dark current limit Silicon detectors are inherently quieter than germanium detectors due to their higher internal resistance and lower capacitance The noise or drift in the dark current sets a lower bound on the measurement resolution that can be achieved with any given detector Cooling a detector significantly lowers its dark current and dark current noise The observed dark currents can also be zeroed at any moment via the ZERO function Since dark currents drift with temperature the ZERO should be adjusted just prior to taking any measurements If the detector temperature is constant sensitivity changes and dark current drifts are significantly reduced The 1918 R Optical Meter can measure the detector temperature and correct the power readings accordingly The power correction happens automatically only for those detectors which are equip
107. oor use only General Information 23 2 3 2 Electrical Specifications DC Current Measurement Low Power Semiconductor Photodiode Signal Range 0 1 2 3 4 Full Scale Current 2 50 pA 25 0 pA 250 pA 2 50 mA 25 mA Resolution Filtered 10 pA 100 pA 1 00 nA 10 0 nA 100 nA Bandwidth Unfiltered 480 Hz 4 kHz 43 kHz 170 kHz 500 kHz Accuracy Filtered 0 2 0 2 0 2 0 2 0 2 Accuracy Maximum Measurement d 5 b Rate 4 kHz 1 0 1 0 1 0 1 0 1 0 Signal to Noise Ratio 100 dB 100 dB 100 dB 100 dB 100 dB Peak Peak Current Measurement Low Power Semiconductor Photodiode Signal Range 0 1 2 3 4 Full Scale Current 2 50 pA 25 0 pA 250 pA 2 50 mA 25 mA Resolution 76 3 pA 763 pA 7 63 nA 76 3 nA 763 nA Accuracy 1 0 1 0 1 0 1 0 1 0 Bandwidth 480 Hz 4 kHz 43 kHz 170 kHz 500 kHz Maximum Pulse Repetition Rate 480 Hz 4 kHz 4 kHz 4 kHz 4 kHz D C Voltage Measurement Thermopile Signal Range 0 1 2 3 4 5 Full Scale Voltage 2 5mV 25 0 mV 250 mV 2 50 V 25 0V 130 V Resolution 76 3 nV 763 nV 7 63 uV 76 3 uV 763 uV 3 96 mV Accuracy 0 2 0 2 0 2 0 2 0 2 0 2 Filtered Acc racy Maximum 1 0 1 0 1 0 1 0 1 0 1 0 Measurement Rate 2 kHz i i j Bandwidth 3 kHz 3 kHz 3 kHz 3 kHz 3 kHz 3 kHz Signal to Noise Ratio 100dB 100dB 100dB 100dB 100dB 100dB Pulse Voltage Measurement Energy P
108. orrected measurement Actual measurement M1 Offset M2 The default value for the two PO a a Mis multipliers is 1 0 and the offset is Multiplier 4 0 0 If any one of these three Offset parameters are changed from their Multiplier 2 default values the main measurement screen shows the corrected measurement A new field J called Detector appears at the bottom of the main screen that Figure47 Correction Settings displays 4 12 Display Modes The selection of various display modes can be done from the default screen hinn by pressing the Mode soft key When cw wear peta ERN the Mode selection screen is displayed Pk Pk Continuous Vertical chart Figure 48 the display mode can be pap Some selected from the second column Figure 48 Mode selection screen System Operation 53 4 12 1 4 12 2 Numeric Display The numeric display is the default display of the 1918 R The numeric display shows the current measured value CW Cont 400 nm Hint Press Figure 49 The Numeric display Analog Bar The Analog Bar display mode brings a bar graph below the numeric display The bar graph is white and follows the value showed by the numeric display The minimum and maximum labels displayed just below the bar graph represent the input range the unit is currently set on For a O example if the unit is set on enter mea 109 99 uW range then the bar graph shows the same range of 0 to 109
109. ous detector families are listed in Table 4 Detector Family Resp Units Mode Amplifier Peak Path Baseline Low Power A W DC No Low Power A W Peak Peak No Low Power A W Integral l No High Power V W DC V No High Power VIW Integral V No Energy VIJ Pulse V Yes Table4 Analog Signal Flow Paths Digitized Signal Flow An analog to digital converter captures the input signal The input signal has the units of current or voltage depending upon how the input amplifier chain was configured Note In this manual the digitized signal may be referred as sampled signal or samples This digitized signal moves through a number of process steps that may or may not alter the digitized value depending upon the operating state of the meter Each of these possible processing steps is discussed further Digital Filter If the digital filter annunciator Dig or Digital is on Section 4 2 5 the filter output is the average of the most recent 10 100 1000 10000 samples The number of samples is selectable by the user with the Filter menu Also the user can change the number of samples When less than the selected number of samples has been acquired since the last reset of the digital filter the output is the average of all the values received The digital filter is reset when the 1918 R Optical Meter is turned on and whenever the UNITS or the range changes or when the MODE of operation changes NOTE When using the digital
110. owing a period of inactivity specified using this command The instrument is considered to be inactive if either the keys on the front panel are not being pressed or if there is no communication with a host PC over USB interface Value Inactive Time Period 0 1 min 1 5 min 2 30 min 3 2 hours 4 Never Related Commands PM AC STANDBY PM AC LEVEL PM AC STANDBY Description Syntax Inactive time period for putting the instrument in standby mode during AC operation PM AC STANDBY Communication Command Reference 79 8 3 3 14 8 3 3 15 Remarks Argument Value The PM AC STANDBY query returns an integer indicating the present inactive time period for putting the instrument in standby mode during AC operation Value Inactive Time Period 0 1 min 1 5 min 2 30 min 3 2 hours 4 NEVER Related Commands PM AC STANDBY PM AC LEVEL PM ANALOGFILTER Description Syntax Remarks Argument Value Analog filter select command PM ANALOGFILTER value The PM ANALOGFILTER command selects the analog filter setting Value Analog Filter 0 None 1 250 kHz 2 12 5 kHz 3 1 kHz 4 0 5 Hz Related Commands PM ANALOGFILTER PM ANALOGFILTER Description Syntax Remarks Argument Value Analog filter query PM ANALOGFILTER The PM ANALOGFILTER query returns an integer indicating the present analog filter setting Value Analog Filter 0 None 1 250 kHz 2 12 5 kHz 3 1 kHz 4 0 5 Hz
111. owing a pre specified period of inactivity to the level specified using this command The instrument is considered to be inactive if either the keys on the front panel are not being pressed or if there is no communication with a host PC over USB interface Value Backlight Level 0 100 1 75 2 50 3 25 84 Communication Command Reference 8 3 3 28 8 3 3 29 4 OFF Related Commands PM BAT BackLight PM BAT LEVEL PM BAT LEVEL Description Syntax Remarks Argument Value Display backlight level following an inactive time period during battery operation PM BAT LEVEL The PM BAT LEVEL query returns an integer indicating the display backlight level following an inactive time period during battery operation Value Backlight Level 0 100 1 75 2 50 3 25 4 OFF Related Commands PM BAT BackLight PM BAT LEVEL PM BAT STANDBY Description Syntax Remarks Argument Value Inactive time period for putting the instrument in standby mode during battery operation PM BAT STANDBY value If the instrument is on battery power it will be put in standby mode following a period of inactivity specified using this command The instrument is considered to be inactive if either the keys on the front panel are not being pressed or if there is no communication with a host PC over USB interface Value Inactive Time Period 0 1 min 1 5 min 2 30 min 3 2 hours 4 Never Related Commands PM BAT STA
112. parameter lt interval gt is of type lt number gt that is an integer The parameter represents the interval in milliseconds for storing one measurement in the data buffer Function This command sets the interval in milliseconds to be used for data storing For example if DSINT 100 and DSSIZE 100 it will take 100 x 100ms to fill the buffer Related Commands PM DS SIZE PM DS SIZE PM DS INTerval PM DS INTerval Description Data Store Interval Query Syntax PM DS INTerval Parameters None Function This query returns the interval in milliseconds currently used for data storing Communication Command Reference 91 8 3 3 50 8 3 3 51 8 3 3 52 Related Commands PM DS SIZE PM DS SIZE PM DS INTerval PM DS SAVEBUFFER Description Save the current Data Store data to a file Syntax PM DS SAVEBUFFER filename Remarks The PM DS SAVEBUFFER command saves the current user Data Store to a file on the WinCE compatible USB Flash Disk plugged into the USB Host port on the front of the Optical Meter Argument Type Description Filename string The filename that will be created or overwritten on the USB Flash Disk containing the measurments stored in the Data Store PM DS SIZE Description Size of the Data Store query Syntax PM DS SIZE lt size gt Parameters The parameter lt size gt is of type lt integer gt in the range 1 to 250000 The parameter represents the size of the data buffer to be used for data storing Funct
113. parser buffer This error is generated if the command in the input buffer is too large to fit into the available space in the parser buffer It is usually generated when commands 134 Appendix B 13 4 are sent to the instrument faster than it can process Parser buffer is 2 048 characters long Device Errors Device Errors are associated with some system condition that affects the operation of the meter Errors associated with data reading will set the appropriate bit but will not generate an error message to avoid jamming the error queue or the interface 701 Detector Calibration Read or Write Failed An etror was encountered during a read write operation to the calibration EPROM in the detector If problem persists contact the factory 703 Optical Meter set to defaults due to Firmware update After upgrading the firmware in some cases the changes are significant enough to require resetting the instrument to factory defaults 704 User reference cannot be changed stored while you are in units of Watts or dBm Change to dB or Rel to set the user reference value User reference can only be stored in dB or Rel mode 705 Illegal data store parameter change Queue cleared An action that affects the data store caused the data store queue to be cleared 706 Digital Filter Interval changed must not be greater than Data Store interval The digital filter interval cannot be greater than the data store interval 707 Digita
114. ped with a thermistor Newport offers detectors with thermistors for temperature compensation See Newport web site www newport com for more details The thermistor signal is read via the detector DB 15 connector and the displayed power is adjusted continuously depending on the detector temperature The analog output signal shows the detector signal and is not corrected for temperature Thermopile Detector Temperature Effects Thermopile Newport High Power detectors are significantly affected by temperature fluctuations arising from airflow disturbances As the detector is a temperature measuring device airflow disturbances set a practical lower limit on the power that a detector can measure In order to get the most out of any thermopile detector be careful to shield the detector from airflow disturbances Common sources of disturbance are air conditioners and people walking past NOTE Use Prediction to deactivate the power meter acceleration software that provides the prediction response By using advanced algorithms and known properties of the detector this software allows the 1936 R to provide a very accurate power measurement a few seconds faster than the natural response of a thermopile power detector It accelerates the natural response by a factor of 5 to 10 Turning off the prediction will result in a slower response but it can provide a more stable measured value in a noisy environment The default is on Users are ad
115. per case in this table The lower case letters shown with the commands are optional and may be used for clarity If any of the optional letters are used then all of the optional letters are required for the command The commands may be sent to the instrument in either upper or lower case or in any combination For example the following commands are equal PM Lambda 810 PM L 810 pm L 810 Pm L 810 COMMAND EXECUTION The controller interprets the commands in the order they are received and execute them sequentially If a set of commands have to be executed closer to each other these commands can be sent to the controller simultaneously by creating a command string with semicolon used as a command separator The command string length should not exceed 50 characters In the example shown below a command string was created with semicolon 70 Communication Command Reference 8 3 8 3 1 separating 5 queries The controller responds to this command string with a response that has 5 values using a comma as a separator COMMAND STRING PM P PM ATT PM L ERR INSTRUMENT RESPONSE 1 2450 1 810 0 Optical Meter Command Description Command Glossary Root level Commands Queries Summary Number of Name Paranieters Function IDN NONE Identification query RCL 1 Recall configuration settings SAV 1 Save configuration settings ADDRess 1 Sets the instrument s USB address ADDRess NONE Returns the instrument s USB
116. ply rises to a peak value and then decays going somewhat negative before finally returning to zero The energy in the radiant pulse is proportional to the height of the peak measured from immediately before the sharp rise 1 0 0 8 0 6 VOLTS 0 0 2 0 4 0 6 0 8 1 0 TIME sec Figure 61 Negative Baseline Voltage Negative Baseline Voltage Due to a Pulse Train shown If a laser pulse arrives before the previous Energy detector signal has fully decayed the detector signal rises from the present decay point of the previous signal Peak to Peak Photodiode Detector Signals The 1918 R enables one to make peak to peak measurements of time varying signals from semiconductor photodiode detectors Since optical power is a zero bounded positive quantity signals from a detector observing such modulated light will similarly be zero bounded positive signals To make a peak to peak measurement the 1918 R must be able to capture both the maximum and minimum values of a detector signal This is accomplished by sampling the signal 112 Principles of Operation DC AVERAGE AC PEAK TO PEAK DC AC PEAK Figure 62 Time Varying Signal Measurements Many different measurements can be made on different portions of a time varying signal The most common are DC power peak power and peak to peak power 9 8 Integration of Detector Signals The 1918 R provides for making measurements that integrate incoming power detector signals to ob
117. port Corporation freight prepaid clearly marked with the RMA and we will either repair or replace it at our discretion Newport is not responsible for damage occurring in transit and is not obligated to accept products returned without an RMA E mail rma service newport com When calling Newport Corporation please provide the customer care representative with the following information Your Contact Information Serial number or original order number Description of problem i e hardware or software To help our Technical Support Representatives diagnose your problem please note the following conditions Is the system used for manufacturing or research and development What was the state of the system right before the problem Have you seen this problem before If so how often Can the system continue to operate with this problem Or is the system non operational e Can you identify anything that was different before this problem occurred viii Preface IMPORTANT NOTE Before plugging the instrument into a PC via a USB communication port please make sure that the USB Drivers are installed Run Setup exe from the Software CD that came with your product The installation program will configure the PC with the 1918 R USB drivers Preface Table of Contents EU Declaration of Conformity cceccccscceeseceseceeeeeeseeeeseceeeeeneeeeeeensaes iii AW A a e e E A a Nauta ease RE e AE EE v Techn
118. prepaid Repaired products are warranted for the remainder of the original warranty period or 90 days whichever first occurs Limitation of Warranty The above warranties do not apply to products which have been repaired or modified without Newport s written approval or products subjected to unusual physical thermal or electrical stress improper installation misuse abuse accident or negligence in use storage transportation or handling This warranty also does not apply to fuses batteries or damage from battery leakage THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE NEWPORT CORPORATION SHALL NOT BE LIABLE FOR ANY INDIRECT SPECIAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE PURCHASE OR USE OF ITS PRODUCTS First printing 2008 2008 by Newport Corporation Irvine CA All rights reserved No part of this manual may be reproduced or copied without the prior written approval of Newport Corporation This manual has been provided for information only and product specifications are subject to change without notice Any change will be reflected in future printings Newport Corporation 1791 Deere Avenue Irvine CA 92606 USA Part No 90039766 Rev A vi Preface Confidentiality amp Proprietary Rights Reservation of Title The Newport programs and all materials furnished or produced in connection with them
119. pressed ore Ref to use The Ref value is assigned a default value of 1 when the system is first turned on The reference value is stored and displayed in the selected units The user can change the reference value with a remote command PM REF VAL value as described in Section 8 3 If the displayed units change then the user needs to update the stored reference value so that the system will store the new units in the reference The Math field can be turned off from the math configurations screen The second Soft key is labeled Display OFF If this key is pressed the system returns to the default screen and the Math field disappears Measurement Correction Settings The 1936 2936 Series power meters provide users the capability to correct actual measurements taken by it through a Correction Settings screen This screen can be accessed by pressing the Correction soft key in Measurement Settings screen Figure 46 The Measurement Settings screen as described earlier can be accessed by pressing the Setup key from main measurement screen 52 System Operation The Correction Settings screen Figure 47 allows users to enter Detector 818P 001 12 two 2 multiplier values labeled ay li co ety e et temp io Therm Multiplier 1 M1 and Responsivity 1 959E 1 Multiplier 2 M2 besides an Offset value The corrected measurement is arrived at using the formula shown below C
120. r USB A Connector Charge Status Indicator 15 pin D Sub Detector Connector Power DC Indicator INPUT Grounding DC Input Pin Connector Figure l4 Side Panel Layout WARNING To avoid electrical shock hazard connect the instrument to properly earth grounded 3 prong receptacles only Failure to observe this precaution can result in severe injury 32 System Overview 3 4 Rear Panel Layout Battery compartment cover Labels Kickstand Figure 15 Rear panel 3 4 1 Rear Panel Elements The rear panel of the 1918 R features the following elements Figure 15 e Battery compartment cover e Kickstand e Labels Markings on the rear panel identify the instrument compliance with different standards and regulations CAUTION There are no user serviceable parts inside the Optical Meter Work performed inside the Optical Meter by persons not authorized by Newport may void the warranty 3 4 2 Kick Stand Positions The instrument can be used in 4 viewing angles allowing the user to adjust for the height of the work surface and lighting conditions e Laying on its back side in the horizontal position e Standing up on its bottom side in the vertical position e At two angled positions by moving the kick stand into two preconfigured notches manufactured into the instrument body System Overview 33 Figure 16 Kickstand in the first angled position 34 System Overview This page
121. r more detailed information lt string gt String Types See the section 12 1 for a detailed description of lt string gt USB Communication The instrument is designed to communicate with standard USB interfaces Before connecting the instrument to the USB interface the user should install the application included in the software CD that accompanies the Optical Meter The application automatically installs the right USB drivers Communication can be done through this interface by using the application or by developing software in the user s preferred programming language The software CD contains drivers and example programs in the following programming languages LabVIEW Visual Basic and Visual C 8 1 8 2 Communication Command Reference 1918 R Optical Meter Remote Interface Commands A complete listing of the commands supported by the 1918 R Optical Meter is provided below Command Overview There are two types of commands commands that cause the Optical Meter to take a desired action and queries that return a stored value or state of the Optical Meter Queries must end with a question mark while commands may require parameter s to follow PM Lambda 810 For example the value 810 in the command PM Lambda 810 sets the wavelength to 810nm The table below summarizes all the commands and queries supported by the 1918 R Optical Meter The command query MUST contain all of the letters which are shown in up
122. rosoft Corporation or their subsidiaries reserve the right to discontinue any Internet based services provided to you or made available to you through the use of the SOFTWARE Recovery Media If SOFTWARE is provided by Newport on separate media and labeled Recovery Media you may use the Recovery Media solely to restore or reinstall the SOFTWARE originally installed on the DEVICE Backup Copy You may make one 1 backup copy of the SOFTWARE You may use this backup copy solely for your archival purposes and to reinstall the SOFTWARE on the DEVICE Except as expressly provided in this EULA or by local law you may not otherwise make copies of the SOFTWARE including the printed materials accompanying the SOFTWARE You may not loan rent lend or otherwise transfer the backup copy to another user End User Proof of License If you acquired the SOFTWARE on a DEVICE or on a compact disc or other media a genuine Microsoft Proof of License Certificate of Authenticity label with a genuine copy of the SOFTWARE identifies a licensed copy of the SOFTWARE To be valid the label must be affixed to the DEVICE or appear on Newport s software packaging If you receive the label separately other than from Newport it is invalid You should keep the label on the DEVICE or packaging to prove that you are licensed to use the SOFTWARE Product Support Product support for the SOFTWARE is not provided by MS Microsoft Corporation or their affiliates or
123. rtainty generated by integration of the noise component terms NOTE The time constant of a thermopile detector determines the amount of time that one should expect to wait when making an integrated energy measurement of an optical pulse Typically an accurate value will be at 5 time constant after the arrival Performing Basic Measurements 63 5 9 RMS Measurements This section describes the procedure for making a basic signal RMS Root Mean Square measurement while properly removing the influence of ambient light and other drift effects The 1918 R begins and ends the signal RMS every second e With a 918D or 818P Detector connected to the meter turn the meter on Set the Mode to RMS Set the Range to Auto and press the Lambda key to set the measurement wavelength to the desired value e Cover or otherwise block the light source being measured turn Zero on Immediately upon entering the RMS mode the meter will begin to acquire and calculate RMS value of the data The display value may reflect the RMS of noise due to ambient temperature fluctuations when using the 818P detectors or light fluctuations when using the 918D detectors e Uncover or trigger the source The displayed value should now reflect the detector signal RMS value e The RMS value is calculated based on data acquired over a one second time period The formula used to calculate the RMS value is given below Where x is the signal measured n is the
124. rument input detector to the Analog Output BNC using a generator with 50 Q output 2 4 2 5 Unpacking and Handling It is recommended that the 1918 R Optical Meter be unpacked in a lab environment or work site Unpack the system carefully small parts and cables are included with the instrument Inspect the box carefully for loose parts before disposing of the packaging You are urged to save the packaging material in case you need to ship your equipment in the future Inspection for Damage The 1918 R Optical Meter is carefully packaged at the factory to minimize the possibility of damage during shipping Inspect the box for external signs of damage or mishandling Inspect the contents for damage If there is visible damage to the instrument or accessories upon receipt inform the shipping company and Newport Corporation immediately General Information 25 WARNING Do not attempt to operate this equipment if there is evidence of shipping damage or you suspect the unit is damaged Damaged equipment may present additional hazards to you Contact Newport technical support for advice before attempting to plug in and operate damaged equipment Available Options and Accessories Newport Corporation also supplies temperature controlled mounts lenses and other accessories Please consult with your representative for additional information Parts List Battery External Power Supply And 1918 R detachable Optica
125. s queries that return a stored value or state of the Optical Meter Query commands are always terminated by a question mark It is recommended that when a query command is sent the response to that command from the Optical Meter be read before issuing any other command Set commands on the other hand are used to configure setup the Optical Meter for a desired mode of operation These commands take at least one parameter The subsequent sections in this chapter detail the USB communication protocols supported by the Optical Meter Computer Interface Terminology Listed below are the key abbreviations and concepts used in the command reference section Section 8 of this manual lt gt Delimiting Punctuation For the purposes of this manual any string enclosed by lt gt is considered to be a command a string or numerical argument The punctuation lt gt is used to symbolize the typographic limits of the command string or argument in question lt CR gt Carriage Return The ASCII encoded byte 13 in decimal OD hex lt LF gt Line Feed The ASCII encoded byte 10 in decimal 0A hex Semicolons Semicolons are used to separate commands within a single transmission concatenation 68 Computer Interfacing 7 2 5 7 2 6 7 3 lt number gt Numerical Types Numerical parameters are passed and returned as the actual ASCII characters in the string representation of the number See section 12 2 fo
126. subsidiaries For product support please refer to the Newport support number provided in the documentation for the DEVICE Should you have any questions concerning this EULA or if you desire to contact Newport for any other reason please refer to the address provided in the documentation for the DEVICE Termination Without prejudice to any other rights Newport may terminate this EULA if you fail to comply with the terms and conditions of this EULA In such event you must destroy all copies of the SOFTWARE and all of its component parts Export Restrictions You acknowledge that SOFTWARE is subject to U S and European Union export jurisdiction You agree to comply with all applicable international and national laws that apply to the SOFTWARE including the U S Export Administration Regulations as well as end user end use and destination restrictions issued by U S and other governments For additional information see http www microsoft com exporting Newport Corporation Worldwide Headquarters 1791 Deere Avenue Irvine CA 92606 In U S 800 222 6440 Tel 949 863 3144 Fax 949 253 1680 Internet sales newport com Newport Visit Newport Online at www newport com
127. t restriction Service Information This section contains information regarding factory service for the source The user should not attempt any maintenance or service of the system or optional equipment beyond the procedures outlined in this manual Any problem that cannot be resolved should be referred to Newport Corporation Copyright and Trademark Information WINDOWS is a registered Trademark of Microsoft Corporation LabVIEW is a registered Trademark of National Instruments INC Visual Basic is a registered Trademark of Microsoft Corporation Visual C is a registered Trademark of Microsoft Corporation vii Preface Technical Support Contacts North America amp Asia Europe Newport Corporation Service Dept Newport MICRO CONTROLE S A 1791 Deere Ave Irvine CA 92606 Zone Industrielle Telephone 949 253 1694 45340 Beaune la Rolande FRANCE Telephone 800 222 6440 x31694 Telephone 33 02 38 40 51 56 Asia Newport Opto Electronics Technologies 253 Aidu Road Bld 3 Fir 3 Sec C Shanghai 200131 China Telephone 86 21 5046 2300 Fax 86 21 5046 2323 Newport Corporation Calling Procedure If there are any defects in material or workmanship or a failure to meet specifications promptly notify Newport s Returns Department by calling 1 800 222 6440 or by visiting our website at www newport com returns within the warranty period to obtain a Return Material Authorization Number RMA Return the product to New
128. tain energy via the CW Integrate mode In CW Integrate mode the display units indicate Joules since energy is the time integral of power ti ti S t EO Paat gt at 7 RQ to As the detector signal actually consists of a stream of digitized values the integral becomes a numerical approximation using the trapezoid method See Figure 63 Detector Signal Numerical Integration Trapezoid Method Magnitude of the Integrated Result Figure 63 Integrated Energy Via a Trapezoid Approximation The INTG measurement mode performs a discrete integration at a 400 Hz sample rate Principles of Operation 113 9 9 Two common applications are natural extensions of the CW Integrate measurement mode 4 Pulse laser energy measurement using a thermopile detector 5 Energy from exposure over a period of time dosage E Input Optical Signal V t Detector s Voltage Pulse 1 E A f V tat A RO te Displayed Signal Figure 64 Measuring Laser Pulse Energy with a Thermopile Thermopiles are often used to measure pulsed laser energy by integrating the response of the detector to the pulse Analog Output The 1918 R provides an analog output for signal monitoring The analog output is the actual amplified detector signal and is uncorrected for the effects of the detector s responsivity calibration and ZERO The analog output signal is a representation of what the meter sees at its input However the analog outp
129. tatistics values In this mode the unit does not disable data collection when the number of samples specified is collected Instead it continues to collect data and place them in a data buffer on a first in first out FIFO basis The statistics shown are representative of data collected since the time Clear Stats was last pressed As in Fixed mode the Clear Stats soft key can be pressed at any time to restart the whole process again The Soft keys offer the user the option to clear the statistics at any time with Clear Stats soft key and to return back to the default screen with Display OFF soft key The Graph soft key Section 4 9 1 can be used for the visualization of the measured values on a time graph The Statistics screen displays also the current measured value at the top of the right column Graph The Graph soft key displays the last 30 240 UW Zoom 1 Val 14 929 uW 10000 measurements on a time graph Figure 43 Due to the sample time interval of 100us the graph duration is 1 second The graph width is 270 pixels and because of that the system has to decimate the 10000 samples to fit them in this fixed 0000k Time 03000 1 00005 number of pixels Therefore the oe oR ee graph might look choppy if the graph zoom is set on 1 Figure 43 Graph screen The user can zoom into the graph with the Soft keys Zoom and Zoom As the zoom changes the graph displays a finer picture of the measurements The zoom value is retain
130. te The UNITs selection depends on the detector used Refer to Table 1 for the relationship between the detector type and units PM ZEROSTOre Description Zero value set command Syntax PM ZEROSTO Remarks The PM ZEROSTO command sets the zeroing value with the present reading Argument Type Description none gt Related Commands PM ZEROVAL PM ZEROVALue Description Zero value set command Syntax PM ZEROVAL value Remarks The PM ZEROVAL command sets the zeroing value When enabled zeroing subtracts the stored zero value from readings before making measurement calculations Argument Type Description Value float Zeroing value Related Commands PM ZEROSTO PM ZEROVALue Description Zero value query Syntax PM ZEROVAL Remarks The PM ZEROVAL query returns the zero value Response Type Description value float Zero exponent Related Commands PM ZEROVAL 9 1 9 2 Principles of Operation Introduction The 1918 R Optical Meter electronics adapt to a number of signal measurement tasks DC current or voltage AC peak to peak current or pulse voltage or integrated DC current or voltage signals This versatility is required to handle the various signals that Newport s Low Power High Power Energy and other detector families generate These detector families are based on semiconductor thermopile and pyroelectric The detector data is introduced to the 1918 R by way of a calibration module specific to the detector in us
131. ted Commands PM RUN PM MODE PM RUN Description Run query Syntax PM RUN Remarks The PM RUN query returns an integer indicating the present run mode Response Value Description Mode 0 Stopped 1 Running Related Commands PM RUN PM MODE 100 Communication Command Reference 8 3 3 76 8 3 3 77 8 3 3 78 8 3 3 79 PM SATLEVEL Description Set detector saturation current density or power level Syntax PM SATLEVEL value Remarks This command sets or overrides the saturation density value recorded in the detector calibration Argument Type Description Value float saturation current density A cm for semiconductor detector or saturation power W for thermopile detector Related Commands PM SPOTSIZE PM SATLEVEL PM SATLEVEL Description Query detector saturation current density or power level Syntax PM SATLEVEL Remarks This command query the saturation density value which is set by PM SATLEVEL command Response Type Description Value float saturation current density A cm for semiconductor detector or saturation power W for thermopile detector Related Commands PM SPOTSIZE PM SATLEVEL PM SPOTSIZE Description Set detector spot size Syntax PM SPOTSIZE value Remarks This command sets the detector spot size By default the spot size is same as a detector s surface area This value is used to when measurement units are set to W cm J cm or Sun Argument Type Descriptio
132. ten improve the source signal to ambient signal noise level Wavelength specific filters such as optical cutoff bandpass or spike filters can also be used if the signal wavelength spectrum permits Other techniques to reduce stray light include using apertures placing detector in a box or other housing to shield the surface from light or air currents when using Newport s High Power disk thermopile detectors which is not coming from the source and turning off room and other light NOTE Changes in ambient light levels can occur from such factors as turning room lights on or off or by moving people or equipment Remember if you can see your detector element then your detector can see the light bouncing off you The effects of ambient light are greatly reduced when using a fiber connectorized signal input to the detector If free space beam measurements are desired using an attenuator will often improve the signal to ambient signal noise level Wavelength specific filters such as optical cutoff band pass or spike filters can be used if the signal wavelength spectrum permits Other techniques to reduce stray light include using apertures placing the detector in a box or other housing to shield the surface from light or air currents and turning off room and other polluting light sources Principles of Operation 117 9 10 6 Signal Filtering The 1918 R Optical Meter offers the user the option to filter the detector signal T
133. tery needs to be removed if the instrument is going to be unused for more than 3 weeks Failure to do so may result in over discharging the battery which drastically reduces the battery life or may cause battery breakdown AC power is supplied through an external power supply that provides in line transient protection and RF filtering This power supply is universal which means it can work at 90 264 VAC and 50 60 Hz CAUTION Permanent damage may occur to the optical meter if external powers supply other than the Newport 1918 PS is used Please call Newport Corporation if extra power supplies are needed for a particular setup CAUTION Do not operate with a line voltage that is not within 90 264 VAC 28 General Information This page is intentionally left blank 3 1 3 2 3 2 1 System Overview Startup Procedure Provided that the Optical Meter has been installed in an appropriate environment and its external power supply power cord is connected to a working electrical outlet power up the Optical Meter by pressing the power button on the upper right corner of the left side panel The battery will start charging If the Optical Meter is turned on for the first time make sure the external power supply is not unplugged from the AC outlet for at least 4 hours During charging the Optical Meter can be used for measurements At the end of the charging time the Optical Meter can be used without the external power supply
134. the Range Dedicated key see Section 4 2 5 Attenuator On Off If the detector is equipped with an integrated attenuator e g 918D Series the 1918 R detects its status ON or OFF and displays it in the Attenuator field The user has the option to manually set the attenuator to ON or OFF for detectors that have attenuators that can be manually mounted on the detector e g 818 Series To change the attenuator status bring the cursor on top of the Attenuator field Hit the Enter key A drop down menu appears with the ON OFF option Select the setting and hit Enter Analog and Digital Filter Selection With the Navigation Selection keys bring the cursor on top of the Analog or Digital field Hit the Enter key A drop down menu appears with the available filter settings Select the desired filter and hit Enter The Analog and Digital filter configuration can be accessed any time with the Filter dedicated key Refer to Section 4 2 5 for details Units Selection With the Navigation Selection keys bring the cursor on top of the Units field Hit the Enter key A drop down menu appears with the available units Select the desired units and hit Enter Mode Selection This setting allows the user to change the measurement mode The available modes are as follows Continuous Wave Continuous Run CW Cont Continuous Wave Single Shot CW Single Continuous Wave Integral CW Integ Peak to Peak Continuous Run Pk Pk Cont Peak to Pea
135. tification Enclosure Cleaning WARNING Before cleaning the enclosure of the 1918 R Optical Meter the external power supply must be disconnected from the unit The enclosure should only be cleaned with isopropyl alcohol or a mild soapy water solution applied to a damp lint free cloth Battery Pack Replacement Maintenance and Service Open cover to remove battery pack Figure 65 Battery Replacement WARNING To reduce the risk of electric shock or damage to the instrument turn the power switch off and disconnect the power cord before replacing a battery pack To replace a battery pack l 2 Disconnect the power cord from the instrument Push the battery cover latches as the arrows show in Figure 65 and lift the battery cover Disconnect the battery pack from the instrument by detaching the connector from the contacts to which it is attached Remove the old battery pack and replace with a new 1918 BAT battery pack by attaching the connector to the contacts and placing the battery pack inside the compartment Close the battery cover while assuring that no wires are caught between the instrument and the back cover Reconnect the power cord charge the new battery pack for at least 4 hours and turn on the instrument 11 3 Spare Parts The following spare parts can be ordered directly from Newport Corporation 126 Maintenance and Service 11 4 Newport Part Number Battery
136. tion Enable int Enable use of detector responsivity with attenuator available in the calibration module for 818 detectors Related Commands PM ATT PM ATT Description Attenuator enable query Syntax PM ATT Remarks The PM ATT query returns 1 when using attenuator calibration 0 when calculating power without attenuator data Response Value Description attenuator 0 Calibrating power without attenuator 1 Calibrating power using attenuator Related Commands PM ATT 82 Communication Command Reference 8 3 3 22 8 3 3 23 8 3 3 24 8 3 3 25 PM ATTSN Description Attenuator serial number query Syntax PM ATTSN Remarks The PM ATTSN query returns the serial number of the attenuator When no detector is found the Optical Meter responds with no detector Response Type Description serial number string Serial number of the attenuator Related Commands PM DETMODEL PM DETSN PM AUTO Description Auto range enable command Syntax PM AUTO mode Remarks The PM AUTO command sets the power ranging to either manual or automatic Argument Value Description mode 0 Manual Optical Meter ranging 1 Automatic Optical Meter ranging Related Commands PM AUTO PM RANge PM AUTO Description Auto range mode query Syntax PM AUTO Remarks The PM AUTO query returns a value to indicate if auto ranging is enabled or not Response Value Description mode 0 Manual Optical Meter ranging 1 Automatic Optical Meter rang
137. tup screen and reconfigure the Soft keys Figure 39 Pressing the System soft key will bring a secondary setup screen Navigate to the Color Selection to change the screen color Figure 40 Also navigate to the Brightness field and hit Enter to change the screen brightness The default value is 100 Press the Measure soft key to go back to the Measurement Settings screen or press ESC to go back to the main screen Det temp Attenuator fi Responsivity Analog filter Ref val Digital filter Offset Units Num Digits Mode CW Cont Spot size Figure 39 Setup screen System Settings EUSB Address ee P Measure Abot Figure 40 System Settings screen System Operation 49 4 8 4 9 Pressing the About soft key will bring a another screen with Firmware Version 2 1 7 Jul 9 2008 information about the unit Firmware Instrument S N P1001 version serial number calibration instrument Cal Date 09 11 2005 date In addition the attached Detect Non AED Detector S N 10095 detectors data is diplayed Figure Detector Cal Date Jan 23 2007 41 From here one can navigate back to the Measurement Settings or back to the System Settings Figure 41 About screen USB Address The USB Address can be changed in the System Settings screen Figure 40 Navigate to the USB Address and hit Enter In the drop down menu select the desired USB address Statistics The 1918 R can d
138. ut signal may be filtered if the user selects the 0 5 HZ filter see paragraph 4 2 5 Also the analog output signal is amplified and scaled to the selected analog output level see Table 5 The user can select the analog output level with a command PM ANALOG OUT see Section 8 3 The analog output maximum level corresponds to the maximum full scale input range the meter is set on For example if one selects the analog output level at 1 V and the meter is set on 250 mW maximum full scale input range the analog output signal will have a transfer function of 250 mW 1 V Therefore if the analog output is connected to an oscilloscope or voltmeter and the user reads 0 125 V the detector power is 125 mW The selectable analog output levels are given in Table 5 Output Range 0 1 2 Full Scale Voltage Load 2 1 MQ 1V 2V 5V Table 5 Analog Output Range Table 114 Principles of Operation 9 10 9 10 1 9 10 2 Measurement Considerations This section describes detector characteristics optical and electrical considerations and environmental influences on optical measurements In general measurement accuracy is limited by the accuracy of the detector calibration Accurate measurements however are also dependent upon proper set up control of temperature and illumination conditions and understanding the factors that affect optical measurements Detector Calibration and Uncertainty Newport Corporation
139. vised to turn the prediction off if they use a high power thermopile at low power levels 116 Principles of Operation 9 10 4 9 10 5 Energy Detector Temperature Effects Pyroelectric Newport Energy detectors are AC coupled devices and thus are not susceptible to temperature induced DC signal offsets or noise floor changes One generally does not need to take much precaution with pyroelectric detectors except to make sure that their damage threshold is not exceeded Ambient and Stray Light Ambient and stray light striking the detector should be considered when making a measurement Ambient light can be distinguished from dark current or the detector meter noise floor by either turning off or blocking the source and covering the detector face with opaque material such as a piece of black rubber Using the human hand to cover the detector is not advised because it emits a significant amount of infrared radiation and radiates a temperature significantly different from ambient With the detector covered a reading of the dark current may be made Next remove the material that is covering the detector and take another reading The difference is the ambient light level The effects of ambient light are greatly reduce when using a fiber connectorized signal input to the detector If free space beam measurements are desired using an attenuator Low Power detectors have an OD3 attenuator included will reduce stray light and of
140. yroelectric Signal Range 0 1 2 3 4 5 Full Scale Current 2 5mV 25 0 mV 250 mV 2 50 V 25 0 V 130 V Resolution 76 3 nV 763 nV 7 63 uV 76 3 uV 763 uV 3 96 mV Accuracy 1 0 1 0 1 0 1 0 1 0 1 0 Bandwidth 600 kHz 1000 kHz 1000 kHz 1000 kHz 400 kHz 1000 kHz ere ere 2 kHz 2 kHz 2 kHz 2 kHz 2 kHz 2 kHz 24 General Information RMS Measurement Maximum Pulse Repetition Rate 2 kHz 4 kHz Accuracy 1 0 2 0 Analog Output Output Range 0 1 2 Full Scale Voltage Load gt 100 kQ y aM ou Accuracy 1 0 1 0 1 0 Linearity 0 3 0 3 0 3 Trigger Level Programmable Level 0 100 Full Scale Resolution 0 39 Full Scale 1 With 0 5 HZ filter on Listed signal ranges specify meter capability Available signal ranges are detector dependent 3 Maximum measurable signal is detector dependent 4 While the maximum repetition range may equal the bandwidth it really depends on the signal duty cycle or the signal shape 5 The Maximum Repetition Rate refers to the meter pulse by pulse measuring capability Due to its high bandwidth the 1918 R can take in signals with higher repetitive rates and outputs them undistorted at the Analog Output The instrument bandwidth is determined by the detector used Please refer to Newport Corporation s complete offering on detector type The specified bandwidth is measured from the inst
141. ys with white the current measured value as the Analog Bar does However its trip is more sensitive because the maximum trip is 1 of the Analog Bar If the Show Max or Show Min soft keys are pressed the system behaves the same as with the Analog Bar displaying with red the maximum value and with green the minimum value As an example as Figure 51 shows the red bar in the Analog Bar is very small so with the Analog Zoom this bar is extended giving the user the convenience to see better small signal variations Pressing the Reset m M soft key clears the minimum and maximum bars from both the Analog Bar and the Auto zoom graphs Analog Needle The Analog Needle displays a vertical marker that moves with the displayed numeric value It is useful for users who look for a maximum or a minimum when adjusting the optical power Figure 52 Analog Needle display System Operation 55 4 12 4 Vertical Chart When the Vertical Chart is selected the numeric display is moved in the upper right corner The vertical chart scrolls down representing a snapshot of the last measurements The chart can be cleared with the Clear soft key The maximum peak value of the chart is the maximum measurement of the entire chart since the last clear Below the chart there is a line with the chart Figure 53 Vertical chart with 10 maximum and minimum in major a A EE A units On the same line in the middle there is information about the chart zoo

Rev A 1918-R Power Meter User`s Manual

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