FieldMaster™ GS
Contents
1. Header Parameters Returns Ranges Example Response tea query trend average energy none energy in joules H HHHHARR if detector is pulse none Request the trend average energy tea 1 550000e 03 Request trend stats maximum energy tem Header Parameters Returns Ranges Example Response tem query trend maximum energy none energy in joules H HHHHARR if detector is pulse none Request the trend maximum energy tem 2 010000e 03 Request trend stats minimum energy tel Header Parameters Returns Ranges Example Response tel query trend minimum energy none energy in joules 7HHHHH eH none Request the trend minimum energy tel 1 210000e 03 55 FieldMaster GS Remote Control cont d 56 Request trend stats standard energy deviation ted Header ted query trend standard energy deviation Parameters none Returns energy in joules 44HHHH EHH Ranges none Example Request the trend standard energy deviation ted Response 4 510000e 06 Request trend stats energy 2sigma stability tes Header tes query trend energy 2sigma stability Parameters none Returns stability HR 4HHHHHeH if detector is pulse Ranges none Example Request the trend energy stability tes Response 2 300000e 00 Request trend stats frequency average tfa Header tfa query trend average frequency Parameters none Returns fre2. Figure 1 FieldMaster GS Power Energy Analyzer The FieldMaster GS is a rugged compact microprocessor based power and energy analyzer that interfaces with the full line of Coherent smart power and energy detector heads FieldMaster GS provides a unique com bination of an analog meter for laser tuning a precise digital display and graphics analysis of power or energy on a high resolution LCD display The FieldMaster GS can be used with all lasers commonly manufactured today CW and pulsed from the UV to the IR with rated power from nanowatts to kilowatts simply by plugging the appropriate detector head into the console FieldMaster GS General Description cont d Features Features of the FieldMaster GS are described below Pulsed CW Measurement The FieldMaster GS supports CW power measurement and Pulse energy measurement See Appendix A for a list of heads supported e Pyroelectric D etectors A complete family of energy measure ment pyroelectric detectors for single pulse or pulse train from 1 04 to 20 J e Semiconductor and T hermal D etectors FieldMaster GS is compatible with semiconductor detectors and the full range of Coherent s patented thermal disk Smart D etector H eads provid ing power measurement capability from 1 nW to 5 kW Versatility More than just a power energy meter the FieldMaster GS also provides complete power and energy trend information beam position drift mea surem
3. System Configuration Commands System Configuration Queries Data Collection Commands Data Collection Queries 41 FieldMaster GS Remote Control Remote Control Error Codes cont d The err query will return error coeds as shown It there are no errors the query response is zero When an error occurs the error code is stored until it is asked for or a new error occurs After the err query is responded to the error code is cleared If the error code is not read and a new error occurs the old error code is replaced by the new error code This means 42 the error code will always reflect the last error that occurred Command Errors Unused Probable Cause Not a valid command or query Unused Parameter value is invalid A non numeric parameter was misspelled Parameter out of range A numeric parameter is outside the valid range for the specified operation No detector connected An operation was requested and no detector is connected Request not valid for current detector A pulsed operation was requested for a CW detector or a CW operation was requested for a pulse detector Requested data not available New data has not been collected since the system was cleared or powered up Unused FieldMaster GS Remote Control cont d Remote Control Screen Display All parameter changes are applied independently of the screen displayed when parameters ar
4. 1X To Exit Press Home Key CALIB IN ZOOM OUT Figure 7 Alignment Quadrant Thermal Detector Head CW Use the ZOOM IN OUT soft keys to decrease Out or increase In the resolution of the target display Each time a key is pressed the resolution value changes Values available are 1X 2X 4X 8X 16X and 32X For example press ZOOM IN and observe that the Zoom value changes to 2X and the Absolute Relative value changes from 19 0 mm to 9 50 mm To exit this screen you must press any Function key Press the CALIB soft key to calibrate the positional accuracy of the detec tor This key is used to improve accuracy over the stored default values When pressed the Calibrate 1 screen appears see Figure 8 Press RESET to restart the process or press CANCEL to abort the operation and re turn to the Align screen or follow the instructions on the display When following the instructions on the display and the beam has been centered press START The Calibrate 2 screen as shown in Figure 9 ap pears Press CANCEL to abort the operation and return to the Align screen or follow the instructions on the display When following the display in structions pressing CALIB resets the calibration of the unit so that mea surement of the distance moved is exactly 5mm The calibration factor is stored in nonvolatile memory To exit this screen you must press any Function key 14 FieldMaster GS Screens ALIGN Quadrant Calibrate
5. COMMON SHARED terms Termination Character string FieldMaster GS can be set to terminate 4 different ways terms NM for line termination termS CHRS 13 Y for CR line termination termS CHRS 13 CHRS 10 for CR LF line termination termS CHR 10 for LF line termination CLS LOCATE 1 5 PRINT FieldMaster GS RS 232 demo program Change the com port and baud rate as required OPEN com1 9600 n 8 1 CD0 CS0 DS0 OP0 RS FOR RANDOM AS 1 x Setup screen LOCATE 23 10 PRINT Press any key to stop TE 8 21 T Current TE 8 36 PRINT Min TE 8 51 T Max TE 10 5 T Power Y Set min max values to extremes pwrMin 1000000 pwrMax 0 58 FieldMaster GS Simple RS 232 Program Example Cont d Get Configuration information PRINT 1 v term versS GetInput LOCATE 2 5 D PRINT vers RI 1 dt terms GetInput 4 5 PRINT Detector RINT detr N Y F a T 5 T request software version number request current detector name 1 request current wavelength Update until a key pressed pw terms convert string to number for compares AAAAW PRINT 1 wv term wvln GetInput LOCATE 5 5 PRINT Wavelength PRINT wvln PRINT meters WHILE INKEYS W P
6. Move detector to center beam 1X then press START RESET CANCEL Figure 8 Calibrate 1 Quadrant Thermal Detector Head CW Move detector exactly 5mm in 1X any direction then press CALIB CANCEL Figure 9 Calibrate 2 Quadrant Themal Detector Head CW 15 FieldMaster GS Screens Quadrant Beam Position 16 Position Screen The Beam Position Stability screen shown in Figure 10 appears when from the Home screen the ALIGN soft key is pressed and then the POSITION soft key is pressed This screen allows you to observe the positional stability of the beam over a selectable period of time On the left beam position is shown as movement about the X axis solid line and Y axis dotted line over the selected duration It is also shown on the right as a polar position plot on the detector Soft key functions on the Position screen are START Starts data collection At the end of the selected duration the data collection screen appears see Figure 11 Pressing Start clears the data and begins a new Position Trend run If required the Time can be changed before beginning a new Position Trend run Note that during data collection the soft keys are replaced by a STOP soft key Press the STOP key to halt data collection POWER Returns you to the Home screen TIME Allows you to select the duration of a run When pressed use the left and right cursor control keys to select the hours minutes or
7. Pin 2 TxD Pin 3 RxD U Pin 5 GND Eco The PC RS 232 port s are either DB 9 or DB 25 male connectors DB 9 male connector pin assignments are Pin 2 RxD A gt Pin 3 TxD Pin 5 GND LA DB 25 male connector pin are E er Pin 7 GND For IBM PC compatible serial ports use a straight through cable The FieldMaster GS uses a 9 pin serial connector Depending on the com puter either a 9 pin to 9 pin cable or a 9 pin to 25 pin cable will be needed Typical pin outs are 9 pin to 9 pin 25 pin to 9 pin Label Pin Pin Label Label Pin Pin Label Computer FM GS Computer FM GS DCD 1 1 DTR 20 1 RX 2 2 TX RX 3 2 TX TX 3 3 RX TX 2 3 RX DTR 4 6 DSR 6 4 GND 5 5 GND DCD 8 6 GND DSR 6 4 GND 7 5 RTS 7 7 CTS 5 7 CTS 8 8 RTS 4 8 RI 9 9 RI NC 9 FieldMaster GS Remote Control Language Syntax One or more command words make up the program message that is sent to the FieldMaster GS to perform one or more operations Remote Control cont d Commands and Command Parameters Both common commands and FieldMaster GS commands may or may not use a parameter For example Parameters 2e 3 required rn 2e3 ind Returns model rst No parameter used Note that there must be a space between the command word and the parameter Parameter types are listed in the following table Parameter Type Example Action ON OFF Boolean Used to enable or of on Sets offset to ON dis
8. none Example Request the current frequency measurement ff Response 2 000000e 01 NOTE This command is for Pulse detectors only Request trend run number of points tp Header Parameters Returns Ranges Example Response tp query number trend points collected none pts HHH number of points currently in trend buffer NOTE This may be less than the number requested if collection has not been completed The Trend run is complete when the number of points collected equals the number of points set none Request the current number of points collected in a Trend run tp 100 Request trend interval ti Header Parameters Returns Ranges Example Response ti query interval between trend data points none data collection interval mm ss s none Request the interval between the first and second trend points ti 00 05 0 51 FieldMaster GS Remote Control cont d 52 Request trend frequency tf Header tf query frequency for a point in a trend run Parameters point HHHF 1 to 2000 Returns frequency in Hz Ranges point must be between 1 and 2000 Example Request the frequency of the 2nd point in the current trend run tf 2 Response 150 Request trend duration td Header td query duration of trend collection Parameters none Returns duration hhimmiss duration of trend run Ranges none Example Request the duration of the trend d
9. see Fig ure 17 for an example and the analog needle swings up from the left corner of the display The digital reading is updated at 3 Hz The analog needle is driven by a D A converter which is updated at 10 Hz The top portion of the screen displays the current measurement in large type Immediately below this measurement in smaller type the peak measurement is displayed The needle moves up as power increases and peak maximum power is indicated by a marker on the scale Soft key functions are described below FieldMaster GS Screens Reset Tune cont d Press the RESET soft key to reset the peak power marker to the current needle position This also resets the Auto ranging function Auto Press the AUTO soft key to enable the automatic range feature Note that range down only occurs when the Reset key is pressed In Auto mode Auto appears on the display just below the analog scale Io tah and Peak 27 5mJ Figure 17 Tune Screen Pulse Detector 25 FieldMaster GS Screens Trend 26 Range Press the RANGE soft key to manually set the full scale range to a select able fixed number The current full scale range under the analog scale is highlighted and the soft keys change to ESCAPE to exit the function without changes ENTER to exit the function and accept changes DEC to decrement the displayed range value INC to increment the displayed range value When in this mode Manual appears on the dis
10. Average is the number of 10 Hz measurements to be used in the average using the running average method The display itself is still updated at 3 Hz This also affects the trend function Wavelength Enter the wavelength of the laser measured Use the left and right cursor control keys to move within the digits NOTE This entry must be exact to insure accuracy Attenuation Enter the amount of optical attenuation due to beam splitters attenuators or other optical elements Use the left and right cursor control keys to move within the digits This affects trend tune and analog out 23 FieldMaster GS Screens Pulse Home cont d Screens Tune 24 HOME WAITING FOR A PULSE 0 6 aJ 0 00 Hz 0 00 W Avg Display Average 1 Wavelength 01064nm Attenuation 00001 00 1 CLEAR AUTO RANGE SETUP Figure 16 Set Range Pulse Detector Press ENTER to accept the changes and return to the Home screen As long as the same detector is connected the values entered here are saved during On Off cycles If a different detector is installed default values will be used until changed To negate any changes and return to the Home screen press ESCAPE Tune Screen CW and Pulse Detectors The Tune function is the same for CW and Pulse detector heads The exception is that the measurement units are Watts for CW detectors and Joules for Pulse detectors When the Tune function key is pressed the Tune screen appears
11. Interval ranges from 00 00 1 to 29 42 0 Set the interval between points of data collection to 5 seconds 00 05 0 ti 00 05 0 47 FieldMaster GS Remote Control cont d 48 Start trend data collection ts Header ts start trend data collection Parameters none Ranges none Example Start Trend data collection ts NOTE Once in progress any RS 232 command or character will stop data capture and the FieldMaster GS returns trend stopped by serial port command Stop trend data collection te Header te stop trend data collection Parameters none Ranges none Example Stop Trend data collection te NOTE Any RS 232 command will stop Trend data capture If this command is sent when the FieldMaster GS is in the Trend screen but not in active data collection it will return the FieldMaster GS to the Home screen Set position run duration pd Header pd set position run duration Parameters duration hhimmiss text string delimited by quotes Ranges Duration ranges from 00 00 30 to 99 59 59 Example Set the duration for Position measurement run to 15 minutes 00 15 00 pd 00 15 00 Start position run ps Header ps start position run Parameters none Example Start Position measurement run ps FieldMaster GS Remote Control cont d Stop position run pe Header Parameters Ranges Example pe stop position run none This command is only valid
12. Request the value of the 1st point in the position run pv 1 00 984 00 731 53 FieldMaster GS Remote Control cont d 54 Request trend stats average power tpa Header tpa query trend average power Parameters none Returns average power in watts 7HHHHHEHHF Ranges From 00 00 30 to 99 59 59 Example Request the trend average power tpa Response 1 550000e 03 Request trend stats maximum power tpm Header tpm query trend maximum power Parameters none Returns power in watts HHHHH etH Ranges none Example Request the trend maximum power tpm Response 2 010000e 03 Request trend stats minimum power tpl Header tpl query trend minimum power Parameters none Returns power in watts HHHHHeHH Ranges none Example Request the trend minimum power tpl Response 1 210000e 03 Request trend stats standard power deviation tpd Header tpd query trend standard power deviation Parameters none Returns power in watts HHHHHReH Ranges none Example Request the standard power deviation tpd Response 4 510000e 06 FieldMaster GS Remote Control cont d Request trend stats power 2sigma stability tps Header Parameters Returns Ranges Example Response tps query trend 2sigma stability none stability AAA HA none Request the trend power stability tps 2 300000e 00 Request trend stats average energy tea
13. Returns offset 4 HAHAHAHA Ranges none Example Request the offset of Response 1 714718e 06 Request number of readings averaged pa Header pa query readings to average Parameters none Returns readings Ranges none Example Request readings to average pa Response 10 FieldMaster GS Data Collection Commands Remote Control cont d Set trigger type tr Header Parameters Ranges Example tr set trigger type type T P Trigger types are T ime and P ulse Set trigger on Time intervals tr t NOTE P option only valid for pulse type detectors Set number of trend points tp Header Parameters Ranges Example tp trend points to collect pts HHH Number of points from 200 to 2000 multiples of 200 Set to collect a Trend run of 400 points tp 400 Set trend duration td Header Parameters Ranges Example td set trend duration dur hh mm ss text string delimited by quotes Duration ranges from 00 00 20 to 99 00 00 Set the duration of Trend data collection to 15 minutes 00 15 00 td 00 15 00 NOTE Duration must be exactly divisible by number of trend points Parameter value will be set to the closest value to the entered value that is exacly divisible by the number of trend points Set trend interval ti Header Parameters Ranges Example td set trend interval interval MmM ss s text string delimited by quotes
14. for Quad type detectors Stop Position measurement run pe Start CW energy cw Header Parameters Ranges Example cw Start none none Cw Zero before CW energy readings cwz Header Parameters Ranges Example CWZ Zero none none CWZ Note gt 2 seconds time out required before a pulse Clear pulse for next pulse in CW energy cwc Header Parameters Ranges Example cwc start none none CWC Note gt 2 seconds time out required before a pulse Exit from CW energy screen cwe Header Parameters Ranges Example cwe end cw energy none none cwe 49 FieldMaster GS Remote Control cont d 50 Help on available commands h Header h help Parameters none Ranges none Example h NOTE This command produces a list of valid commands and a brief description of each see Appendix C Data Collection Queries Request power reading pw Header pw query power Parameters none Returns pwr He Ranges none Example Request the current power reading pw Response 1 430000e 03 Request energy reading en Header en query energy Parameters none Returns energy e fff If detector is pulse Ranges none Example Request current energy reading en Response 1 438641e 03 FieldMaster GS Remote Control cont d Request frequency ff Header ff query frequency Parameters none Returns freq H HHHH eH Ranges
15. key The 80 280 measurement points are expanded to the full width of the graph Press Return to go back to Figure 21 and then press Trend to return to the Trend screen shown in Figure 20 Note that the Zoom soft key will not appear if the number of measurement points selected during Setup equals 200 NEW Press this key to return to the initial Trend screen to start another data collection process NOTE Pressing N ew erases previ ously collected data All data is lost if you exit the Trend Screen 000 mJ ZMD 80 280 OF 400 MODE TIME TIME 000 07m DV POINTS 400 PLOT ALL DURATION 00 00 40 FIT NORMAL INTERVAL 00 00 00 1 SELECT RETURN Figure 22 Zoom Trend Screen Pulse Detector 33 FieldMaster GS Screens Trend Statistics 34 STAT Press this soft key to view the statistical results of the data mea sured The screen which appears will be similar to Figure 23 with a CW Detector It will also be the same for a Pulse Detector if during Setup Time is selected for the MODE parameter See Figure 18 and MODE descrip tion on page 27 If Pulse is selected for the MODE parameter the Statis tical screen for a Pulse Detector will appear similar to Figure 24 Pressing the TREND soft key returns you to the screen shown in Figure 20 This allows you to select another method of viewing the results of data collection within the same frame of data collection reference or to start the process again FieldM
16. must be added to detector accuracy for total system accuracy User selectable 1 200 Full remote capability and data transfer 9600 baud 0 1Volt 2 5 Hz update rate 1 Khz Maximum pulse rate 10 Hz Maximum every pulse capture rate for trend and statistics screens gt 10 Hz sampling at 10 Hz Single pulse detection 10 accuracy without calibration Readout averaging Beam Alignment Position measurement 5 at 5mm built in calibration 2000 points pulsed or time acquisition modes 10 Hz acquisition for CW detectors Up to 10 Hz sampling rate Retains configuration information when turned off wavelength values display information etc 5 C to 40 C 63 FieldMaster GS Specifications cont d Safety Features Size Weight Power Requirements Visual sensor over temperature and sensor over range warning Has protective cover which doubles as a standup base An optional soft carrying case is also available 7 6 long x 4 6 wide x 1 8 thick when closed 19 cm x 11 7 cm x 4 6 cm 28 ounces w batteries AC operation 115 VAC or 230 VAC 50 60 Hz 50 60 Hz 2 VA 2 VA DC operation 9 VDC 0 4A 7 5V Internal rechargeable battery pack Recharged automatically during AC opera tion Battery life 8 hours without backlight on 4 hours with backlight on FieldMaster GS Appendix A FieldMaster GS Block Diagram and Circuit Operation FieldMaster GS Block Diagra
17. negate any changes and return to the Home screen press ESCAPE Home Screen Pulse Detector The Home screen for a Pulse Detector is shown in Figure 15 This screen displays the energy of the last pulse received and the frequency and aver age power of that pulse Frequency is calculated based on the time be tween the last 2 pulses Average power equals the energy of the last pulse multiplied by the frequency The reading remains until either another pulse is received or the CLEAR soft key is pressed Note that ifanother pulse is not received immediately a WAITING FOR A PULSE message appears This message also appears after CLEAR is pressed 21 FieldMaster GS Screens Pulse Home cont d 22 WAITING nm U 2 30mW Avg Display Average 1 Wavelength 01064nm Attenuation 00001 00 1 Auto Range CLEAR AUTO RANGE SETUP Figure 15 Home Screen Pulse Detector Pulse measurements are calculated at 10 Hz based on the last pulse re ceived The digital reading in both the Home function and Tune function displays is updated at 3 Hz with the measurement value of the last pulse If pulses stop the value of the last pulse measured will be displayed Soft keys on this screen are discussed below Clear Use the CLEAR soft key to set the energy frequency and power to zero and to set the Auto Range to the minimum range Auto Use the AUTO soft key to change the Range scale to automatic mode When pressed the rang
18. number gt send trend data point 0 number of points v show Software version number wv lt wavelength m gt set wavelength in meters wv read wavelength in meters FieldMaster GS Warranty The seller warrants to the original Buyer each item manufactured by it to be free from defects in material and workmanship for a period of time and under such conditions as specified in the Seller s warranty for the individual product or for twelve 12 months from delivery if a warranty for the individual product is not specified Major sub systems manufac tured by other firms but integrated into the Seller s systems are covered by the original Manufacturer s warranty The Seller s liability under valid warranty claims is limited to repair or replacement at the Seller s plant or the Buyer s location all at the option of the Seller THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES WHETHER WRITTEN ORAL OR IMPLIED AND SHALL BE THE BUYER S SOLE REMEDY AND THE SELLER S SOLE LIABILITY ON CONTRACT OR WAR RANTY OR OTHERWISE FOR THE PRODUCT THE SELLER DISCLAIMS ANY IMPLIED WARRANTY OR MERCHANTABIL ITY OR FITNESS FOR PURPOSE All claims under warranty must be made promptly after occurrence of circumstances giving rise thereto must be received within the applicable warranty period by the Seller and shall be subject to the terms and condi tions stated herein Such claims should include the product serial num
19. off Default setting is 0 with the maximum being 480 The Auto Off mode is disabled if set to 0 This feature is only func tional when using battery power Alog Out Use this item with the INC ON and DEC OFF soft keys to adjust the full scale power energy range at the Analog Out side panel connector This output equivalent to 1VDC is from a 12 bit D A which provides an output impedance of 1 5K ohms No other screen functions will change this range This setting retained in nonvolatile memory during On Off cycles reverts to default if a different detector is plugged in NOTES Analog out is not active in trend mode if data is not being col lected In pulse mode clear or reset keys do not clear the value on the analog out TermChar Use this item with the INC ON and DEC OFF soft keys to set the RS 232 communication termination character the FieldMaster GS and host computer use Pressing INC ON or DEC OFF scrolls through the four choices of termination characters listed below The computer com munication software determines which termination character must be used Y back slash CR carriage return LF line feed CR LF carriage return and line feed System Status Use this item to display the System Status screen Figure 5 This is the same screen which briefly appears when the unit is turned on The Sys tem Status screen identifies the detector head connected to the unit and the software version installed in the unit Pr
20. seconds field and use INC to increment or DEC to decrement the selected field Press ENTER to accept the displayed duration Maximum value is 99 hours ALIGN Returns you to the ALIGN POSITION CANCEL selec tion screen FieldMaster GS Screens Quadrant Beam Position cont d POSITION Beam Position Stability ee Time 00 00 15 1 mm START POWER TIME ALIGN Figure 10 Beam Position Quadrant Thermal Detector Head CW TREND Beam Position Stability 1 mm START POWER TIME ALIGN Figure 11 Beam Position Complete Quadrant Themal Detector Head CW 17 FieldMaster GS Screens Quadrant Energy 18 Energy Quadrant Thermal Detector Single Pulse Operation Press the ENERGY soft key on the Quadrant Thermal Detector CW Home screen to select single pulse measurement This function allows you to enter a zero offset after which the unit is ready for a single pulse measure ment When pressed the Energy 1 screen is displayed as shown in Figure 12 The Zero offset function must be performed for the first pulse and for maximum accuracy a zero offset should be entered each time you press the ENERGY key and before a pulse is received This screen shows the current or default setting for Wavelength and Attenuation One soft key ZERO is available Remove power from the detector before pressing ZERO When Zero is pressed the screen briefly displays the following message
21. 0 seconds 200 x 0 1 sec 20 sec FieldMaster GS Screens Trend cont d The display shows a graph and two columns of parameters and the soft keys This screen also gives you three methods of displaying the measured data by plotting statistically and by histogram Discussion of the Trend screen begins with the Setup soft key 000 mJ MODE TIME TIME 000 07m DV POINTS 400 PLOT ALL DURATION 00 00 40 FIT NORMAL INTERVAL 00 00 00 1 START SCROLL SETUP Figure 18 Trend Screen Pulse Detector Setup Press SETUP to change the parameters shown on the display and dis cussed below When pressed POINTS at the top of the left column is highlighted Use the up and down arrows on the cursor control pad to highlight the item to be changed and the DEC INC soft keys to decre ment increment the value for that item Parameter selection is top to bottom left column to right column with full wrap around Note that the DURATION item also uses the left and right cursor control keys to move within the field Parameters in the left column are MODE With a CW Detector This parameter cannot be changed from TIME mode In the Time mode the horizontal display is con trolled by the Time Interval Note that if no beam is present during a timed run the last pulse collected will continue to be displayed 27 FieldMaster GS Screens Trend cont d 28 With a Pulse Detector The Mode can be toggled between TIME a
22. EC keys to change the value of the highlighted parameter Display Average Enter the number of readings to be averaged for the displayed power or energy value Valid entries are 1 2 5 10 20 50 100 and 200 Measurements are calculated at 10 Hz i e 10 per second The display is updated at 3 Hz with the value of the most recent measurement The Display Average is the number of 10 Hz measurements to be used in the average using the running average method The display itself is still updated at 3 Hz This also affects the trend function Wavelength Enter the wavelength of the laser measured Use the left and right cursor control keys to move within the digits NOTE This entry must be exact to insure accuracy Attenuation Enter the amount of optical attenuation due to beam splitters attenuators or other optical elements Use the left and right cursor control keys to move within the digits Attenuation affects the trend tune and analog out FieldMaster GS Screens Non Quadrant Home cont d Screens Pulse Home Display Average 1 Wavelength 00400nm Attenuation 00001 00 1 Offset 0 10 OFFSET Figure 14 Home Screen Non Quadrant Thermal DetectorHead CW Press ENTER to accept the changes and return to the Home screen As long as the same detector is connected the values entered here are saved during On Off cycles If a different detector is installed default values will be used until changed To
23. FieldMaster GS Power Energy Analyzer User Manual EN a TUNE S E 5 Bmw RESET Auro Jha a FieldMaster GS 1 COHERENT FieldMaster GS FieldMaster GS Power Energy Analyzer User Manual Software Version 2 10 COHERENT Manual Part Number 0217 378 00 EA 2002 Coherent Inc FieldMaster GS FieldMaster GS Contents General Description ns dsd 1 Features poeta rescate tere en ORA ne RKE EENE eR asiant 2 Wipaching srk Anda 4 Controls amp Connections a 5 Front Paneli ne and N R ES 5 A 6 EU in 7 O en ne RR 7 SCT ENS ida alcal 8 Over Temperature siinsest n eena EEA EASi 8 Screens Mena diia 9 Invert Dip go RU OR RR NO DR RR RE RR RN i 9 Backlight srei siase ns in st tas RR 9 Contrasta ea alo A en eee eee 9 O A AAR 10 BODIES OS 10 TAME A Ge ects ecm Sonnet aoe cap onan EEA 10 SY Stein Stats seere br nn A nl es et A n din 10 Home Screen Quadrant Thermal Detector Head CW 11 Offset e iaee a teal RU oda oss NS 12 SETUP ceva tie gin da doa re E LAS cas cad sateen isis 12 AM a 13 Energy Quadrant Thermal Detector Single Pulse Operation diia cis ii al adidas 18 Home Screen Non Quadrant Detector Head CW ocooccnicniccconioncnnos 20 A ein aan eee aman DR 20 SECU py aio dees seit ap sees cod RO PRN RENDER OS OR cdees 20 Home Screen Pulse Detector tires 21 O a a N A 22 RULO Ai ee Pr met me ne beau anti aE 22 RE 23 SETUP nr nt bete re gaedines sasuesenesueeaasseeuva
24. OFFSET ZEROED The display then changes and the Energy 2 screen appears as shown in Figure 13 In Figure 13 soft key functions are Clear Resets the display for another pulse Zero Resets the offset to zero Power Returns the display to the Home screen FieldMaster GS Screens Quadrant Energy cont d READY TO ZERO OFFSET Wavelength 00514nm Attenuation COCCI OO Figure 12 Energy 1 Quadrant Thermal Detector Head CW Wavelength 00514nm Attenuation 00001 00 1 CLEAR ZERO POWER Figure 13 Energy 2 Quadrant Thermal Detector Head CW 19 FieldMaster GS Screens Non Quadrant Home 20 Home Screen Non Quadrant Detector Head CW The Home screen for a non Quadrant Detector Head CW is shown in Figure 14 In this screen power measurement is displayed in the upper half of the screen Soft keys on this screen are discussed below Offset Use the OFFSET soft key to compensate for ambient light When first pressed the screen displays the offset value The second time the key is pressed the offset value is returned to zero regardless of the power input at the time the key is pressed and the screen displays 0 offset Setup Use the SETUP soft key to change the parameters for the Display Aver age Wavelength and Attenuation When Setup is pressed Display Aver age is highlighted Use the up and down cursor control keys to move the highlight up and down between the three parameters and the INC D
25. On or Off allowed When On current reading becomes the offset To set the Offset to the current reading of on Set number of readings to average pa Header Parameters Ranges Example pa set readings to average readings Valid ranges are 1 2 5 10 20 50 100 200 To set the average to 10 readings pa 10 FieldMaster GS Remote Control cont d System Configuration Queries Identify system ind Header ind identify system Returns FieldMaster GS text string Example Request system identification ind Response FieldMaster GS Request detector type dt Header dt query detector Returns detector text string delimited by double quote marks Example Request the detector type dt Response LM 10 Request wavelength setting wv Header wv query wavelength Returns wavelength in meters Example Request the wavelength wv Response 5 320000e 07 Request attenuation at Header at query attenuation Returns attenuation value between 1 00 and 100 000 0 Example Request the attenuation at Response 100 45 FieldMaster GS Remote Control cont d 46 Request range rn Header rn query range Parameters none Returns range 4 4 e Ranges none Example Request the range rn Response 2 000000e 03 NOTE This command is only used for Pulse detectors Request offset of Header of query offset Parameters none
26. RINT 1 pwr GetInput power VAL pwr LOCATE 10 20 PRINT USING Y IF power gt pwr pwrMax LOCATE PRINT END IF IF power lt pwr pwrMi LOCATE PRINT U ax THEN 10 SING Y 10 SING Y power power 50 AAAAM LA pwrMax in THEN power 35 AAAAM r pwrMinTurn 59 FieldMaster GS Simple RS 232 Program Example Cont d END IF WEND This function reads one character at a time from the com port until x the linefeeds or carriage returns FUNCTION GetInput dones 0 Look for last character in termination string end RIGHTS term 1 DO temp INPUT 1 1 a termination character is rec d It returns the string without any Dynamically determine correct terminator IF temp THEN endS W IF temps IF temps CHRS 10 THEN end Finish input on termination character IF temp end THEN dones 1 GetInput resps END IF Strip CR and LF characters IF temp lt gt CHR 10 AND temp lt gt CHRS 13 resp resp temps END IF LOOP UNTIL done END FUNCTION 60 CHR 13 THEN end CHRS 13 CHRS 10 FieldMaster GS Determining Firmware Version Maintenance Turn the FieldMaster GS on and press the MENU key From the Menu scre
27. able an instrument operation OFF disables of off Sets offset to operation ON enables OFF operation T P Explicit Two or more tpt explicit parameters to Sets trigger to choose from T or P Time HHHH Numeric representation rn 2e 3 Sets Range to format Parameter is a 002 number that can be expressed as an integer e g 8 a real number e g 10 6 or an exponent e g 23e3 hh mm ss String data td 00 15 00 Sets Trend Duration to 15 minutes 39 FieldMaster GS Remote Control cont d 40 Query Commands This type of command requests queries the currently programmed sta tus It is identified by the question mark at the end of the fundamental form of the command Most commands have a query form For example td 00 15 00 Set Trend Duration to 15 minutes td Request Trend Duration Case Sensitivity Use lower case for all commands Program Messages A program message is made up of one or more command words sent by the computer to the FieldMaster GS Examples Single command messages The commands in this structure can be executed by sending two separate program messages as tp 500 n td 00 15 00 n Program message terminator Each program message must be ter minated with a backslash and the termination character determined by the computer and selected in the Menuscreen Examples are r Carriage Return n Linefeed FieldMaster GS Remote Control Commands All commands
28. am to communicate with the FieldMaster GS through the RS 232 port will need to be written An example program is provided The example program uses the COM2 serial port If the computer is using a COM port other than COM2 a modification to the OPEN COM2 statement to reflect the COM port actually being used will need to be made The communication parameters used by FieldMaster GS are as follows Baud Rate 9600 Parity none Data Bits 8 Stop Bits 1 Message Exchange Protocol The message exchange protocol is summarized as follows 1 Tell the FieldMaster GS what to send to the computer 2 Check for the correct character termination 3 The complete response message must be received by the computer before another program message can be sent to the FieldMaster GS NOTE The FieldMaster GS will only respond to RS 232 commands from the Home screen or the Trend screen When in other screens RS 232 commands collected in the input buffer Periodically returning to the Home or Trend screen will process buffered RS 232 commands Re maining in other screens can cause the input buffer to overflow 37 FieldMaster GS Remote Control cont d 38 Data Connections Connections for data transmission between the FieldMaster GS and PCs are FieldMaster GS TxD connects to the PC RxD FieldMaster GS RxD connects to the PC TxD Connector pin outs are FieldMaster GS RS 232 port is a DB 9 female connector Pin assign ments are 5 3 2
29. and queries are in ASCII text All commands and queries comply with the ANSI IEEE 488 2 1987 Standard In general the rules listed in the table below apply to the formatting of data that is sent or received on the bus Remote Control cont d Data Type Numeric Definition Numeric data may consist of digits a decimal point a leading sign i e or and an exponent with or without a leading sign Example 123 0 0123 1 23e 2 Character Character data may consist of alphabetic characters digits and underscores although it must begin with an alphabetic character abc a_b_c a1 b2 c3 String String data allows any 7 bit ASCII character This includes alphabetic characters digits and all punctuation characters String data MUST be delimited by either single or double quotation marks 11 10 98 10 30 00 Arbitrary Arbitrary ASCII data may include 8 bit ASCII values It does not require any delimiters but it must be the LAST value in a transmission In the FieldMaster GS the only item that uses the arbitrary ASCII data format is the IEEE 488 2 mandated query idn Coherent Inc FieldMaster GS 0 2 00 To send a command copy the command into a text string and pass the string to the function that will write the string to the RS 232 port The type of remote control commands for the FieldMaster GS are listed below and shown in tabular format on the following pages
30. aster GS Screens TREND STATISTICS Trend Statistics MIN 123mg cont d MEAN 123mg MAX 123md StdDev 0 41mJ STAB D 66 POINTS 400 DURATION 00 02 00 Interval 00 00 00 3 Figure 23 Trend Statistics Screen Time Mode TREND STATISTICS ENERGY POWER FREQ HZ MIN 123mJ 1 20W om 8 MEAN 123mJ TIL 102 MAX 123mJ SAN LOS 6 6 StdDev 0 48mJ 79 6W One STAB 4 5 0 18 LISTES 12 POINTS Figure 24 Trend Statistics Screen Pulse Mode 35 FieldMaster GS Screens HISTO Press this soft key to view a histogram of the results of Trend Histogram measurements collected The screen which appears will be similar to end His ogra Figure 25 Pressing the TREND soft key returns you to the Trend screen shown in Figure 20 Note that the type of FIT previously selected determines the horizon tal scaling on the Histogram HISTOGRAM 260 E O di N T 5 qe 0 0mJ 10 00mJ TREND a laj la lal Figure 25 Histogram Trend Screen Pulse Detector 36 FieldMaster GS Remote Control Introduction The remote control language used by the FieldMaster GS adheres as closely as possible to the IEEE 488 2 1987 standard This standard was origi nally developed for the IEEE 488 GPIB bus but many instruments including thte FieldMaster GS have adopted the standard for RS 232 comminucation as well All commands are through the RS 232 port set to 9600 baud Making the Software Connection A progr
31. ata collection run td 2 Response 00 15 00 Request trend data point value tv Header tv query value of trend data point Parameters point HHH 1 to 2000 Returns value in joules or watts 4HHHHH eH Ranges point must be between 1 and 2000 Example Request the value of the 1st point in the trend run tvf 1 Response 1 520000e 03 Request position trend point value po Header po query current position Parameters none Returns x y FARAH HHHH location in mm Ranges none Example Request the current position reading po Response 00 984 00 731 FieldMaster GS Remote Control cont d Request position run interval pi Header Parameters Returns Ranges Example Response pi query interval between points in position run none data collection interval mmiss s none Request the interval between the 1st and 2nd points in the position run pi 00 15 0 Request position run duration pd Header Parameters Returns Ranges Example Response pd query duration of position run none duration hh imm ss in seconds From 00 00 30 to 99 59 59 Request the duration of the current position run pd 00 15 00 Request position run data point value pv Header Parameters Returns Ranges Example Response pv query position of point point HH 1 to 170 x y FARAH HHHH location in mm point must be between 1 and 170
32. ber the date of shipment and a full description of the circumstances giv ing rise to the claim Before any products are returned for repair and or adjustment authorization for the return and instructions as to how and where these Products should be shipped must be obtained from the Seller Any product returned to the Seller for examination and or warranty re pair shall be sent prepaid via the means of transportation indicated as acceptable by the Seller The Seller reserves the right to reject any war ranty claim on any item that has been shipped by non acceptable means of transportation When any product is returned for examination and inspection or for any other reason the Buyer and its shipping agency shall be responsible for all damage resulting from improper packing or handling and for loss in transit notwithstanding any defect of non con formity in the Product In all cases the Seller has sole responsibility for determining the cause and nature of failure and the Seller s determina tion with regard thereto shall be final If it is found the Seller s Product has been returned without cause and is still serviceable the Buyer will be notified and the Product returned at the Buyer s expense A charge for testing and examination may in the Seller s sole discretion be made on products so returned B5 FieldMaster GS Sales amp Thirty years of innovation Service Coherent has been the world leader in the manufacture of lasers an
33. d Information the instruments to measure them for over thirty years Coherent offers complete solutions for laser characterization process control and system design You may contact your local representative or Coherent for further infor mation regarding these items Call and ask for one of our customer care specialists Purchase orders may be placed by phone fax or mail United States France 2303 Lindbergh Street Domaine Technologique Aubum CA 95602 de Saclay Sales Tel 1 800 343 4912 B timent AZUR Sales Fax 530 889 5366 4 rue Ren Razel Service Tel 530 888 5062 91892 Orsay Cedex Service Fax 530 889 5262 France United Kingdom 15 Greycaine Road Tel 33 1 60 19 40 40 Fax 33 1 60 19 40 00 Watford Herts WD24 7G W Japan England Toyo MK Building Free Phone 0800 515801 7 2 14 Toyo Tel 44 0 1923 206900 Koto ku Fax 44 0 1923 244461 Tokyo 135 Japan Germany Tel 81 0 3 5635 8680 Dieselstra Be 5b Fax 81 0 3 5635 8681 D 64807 Dieburg Germany Tel 49 6071 968 0 Fax 49 6071 968 499 www Coherentinc com United States 2303 Lindbergh Street Auburn CA 95602 U S A Toll Free 1 800 343 4912 Tel 530 889 5365 Fax 530 889 5366 United Kingdom 15 Greycaine Road Watford Herts WD24 7GW England Free Phone 0800 515801 Tel 44 0 1923 206900 Fax 44 0 1923 244461 Germany DieselstraBe 5b D 64807 Dieburg Germany Tel 49 607 1 968 0 Fax 49 6071 968 499 France Doma
34. e changed via RS 232 commands When Trend or Position parameters have been changed via RS 232 the changes do not appear on the FieldMaster GS display until a Trend or Position run is started using the ts command When Home screen parameters are changed via RS 232 commands the changes do not appear on the FieldMaster GS display until the Home button on the FieldMaster console is pressed or another function is ended In all cases the parameter changes are actually made and in effect imme diately after the RS 232 command is sent System Configuration Commands Restart system rst Header rst restart system Example Reboot the system rst Set wavelength wv Header wv set wavelength Parameters wavelength meters e Ranges determined by detector Example Set the wavelength to 532 nm wv 5 32e 9 Set attenuation at Header at set attenuation Parameters attenuation e Ranges attenuation range 1 00 to 100 000 0 Example To set the attenuation to 100 1 at 100 or at 1 0e 43 FieldMaster GS Remote Control cont d Set range rn Header Parameters Ranges Example rn set range range e Valid range depends on the detector and attenuation Input range of 0 zero autorange To set the range to 2 mW rn 2e 3 NOTE This command is only used for Pulse detectors Set offset of Header Parameters Ranges Example of set offset On Off Only
35. e scale resets the maximum allowable range to a variable within the limits of the detector On the Home screen the dis play shows Auto Range FieldMaster GS Screens Pulse Home cont d Range Use the RANGE soft key to manually set the energy range scale to a selectable fixed number When pressed the Pulse Home screen changes see Figure 16 Set Range xxx is highlighted and the soft keys change to ESCAPE to exit the function without changes ENTER to exit the function and accept changes DEC to decrement the displayed range value INC to increment the displayed range value Note that pressing any Function key also exits this function Also note that setting a manual Range will set the trigger level to 10 of that range Note that setting the Range to Manual is intended for single pulse appli cations Setup Use the SETUP soft key to change the parameters for the Display Aver age Wave Length and Attenuation When Setup is pressed Display Aver age is highlighted Use the up and down cursor control keys to move the highlight between the three parameters and the INC DEC keys to change the value of the highlighted parameter Display Average Enter the number of readings to be averaged for the displayed power or energy value Valid entries are 1 2 5 10 20 50 100 and 200 Measurements are calculated at 10 Hz i e 10 per second The display is updated at 3 Hz with the value of the most recent measurement The Display
36. en use the up and down cursor control keys to select SYSTEM STA TUS and then press INC ON The version number will be shown e g 1 20 just above the EXIT soft key Newer detectors may require current firmware to operate For firmware updates contact Service see the last page of the manual Cleaning the Graphic Screen Window To reduce the effect of static electricity on the analog meter movement please clean the window with the enclosed antistatic cloth only Battery Replacement The FieldMaster GS comes with a Nickel Cadmium rechargeable battery pack The unit has a built in battery charging circuit If the battery pack requires replacement either contact Coherent for replacement instruc tions or return the unit to Coherent for replacement 61 FieldMaster GS Trouble Shooting 62 PROBLEM PROBABLE CAUSE SOLUTION Unable to turn Dead battery Use AC Adapter while FieldMaster GS On batteries charge Unit faulty Contact Coherent Service No Detector Detector not plugged in Plug detector in message Detector faulty Contact Coherent Service Cable faulty Unit faulty OVER TEMP Detector head is over Turn energy power down message specified maximum Attenuate beam temperature Remove Detector from beam Backlight not on Not turned on in Menu Turn On in Menu function function Display faulty Contact Coherent Service Needle not Nat in tune screen Go to tune screen a charge message range of the Detector Detector with appropria
37. ent statistics and tuning Communications The FieldMaster GS supports the following communication modes e Analog O ut Provides 0 1 Volt output at 5Hz update rate to operate an external device such as a chart recorder e RS 232 Interface Standard RS 232 interface for full interac tive operation of the FieldMaster GS by a computer The interface can also be used to download data from the unit to a computer for storage graphing and analysis Hot D etector H ead Swapping The FieldMaster GS allows swapping of detector heads while power re mains On After a swap the unit reboots with the correct settings for the new detector head FieldMaster GS General Description cont d Smart D etector Technology FieldMaster GS detector heads utilize Coherents Smart D etector Technol ogy Each detector head has an EEPROM which stores the characteristics and calibration data for the detector This information is read by the FieldMaster console at start up eliminating the need to make manual changes to the console when changing detectors NOTE This does not refer to user required entries for Display Average Wavelength and At tenuation Analog Sensitivity and Feedback The analog meter movement in the FieldMaster GS gives fast smooth feedback and provides the fast response time necessary for laser tuning Digital Precision The FieldMaster GS unique high resolution LCD graphic display pro vides precise digital readout of power
38. erved on the graph and plotted continuously until a selected duration has been reached A display similar to Figure 20 then appears During collection the previous soft keys are replaced by a STOP soft key on the right Pressing Stop halts data collection returns you to the Trend screen Figure 18 and you may view the statistics or histogram of the measurements collected or begin the process again 000 mJ MODE TIME TIME 000 07m DV POINTS 400 PLOT ALL DURATION 00 00 40 FIT NORMAL INTERVAL 00 00 00 1 STATS Histo Figure 20 Start Trend Screen Pulse Detector FieldMaster GS Screens Trend Graph Soft keys on Figure 20 are described below GRAPH Press this key to graphically view the collected measure ments as described below When pressed a screen similar to Figure 21 appears Press the TREND soft key to return to the completed Start screen Figure 20 Press the PLOT soft key to toggle between the following two meth ods of plotting the data ALL Each measurement is plotted on the vertical axis at the point determined by dividing the total points by 200 horizontal points For example if 1000 total measurement are collected points 1 through 5 will be plotted on the same vertical pixel col umn points 6 through 10 on the next vertical pixel column etc AVG The necessary number of measurements to make 200 points are averaged For example if 2000 measurements are collected each data point plotted w
39. ess EXIT to return to the main menu Note that No Detector appears in the lower portion of this screen if a detector is not connected or either the detector head or cable is defective FieldMaster GS Screens Menu cont d Screens Quadrant Home FieldMaster GS VERSION 2 10 DETECTOR LM 10 QUAD HD EXIT La la la la Figure 5 System Status Home Screen Quadrant Thermal Detector Head CW The Home screen which appears when using a Quadrant CW Detector Head is shown in Figure 6 This screen displays either the default param eters or the current operating parameters for Display Average Wavelength Attenuation and Offset From this screen use the soft keys to select Off set Align Energy and Setup The Offset and Setup functions are dis played on the Home screen while the Align and Energy functions are displayed on additional screens A target showing the location of the beam on the detector is on the right side of the display For maximum accuracy align the detector so that the beam location indicator is within the small circle of the target 11 FieldMaster GS Screens Quadrant Home 12 HOME 18 8 ml Display Average 1 Wavelength 10600nm Attenuation 00001 00 1 Offset omo OFFSET ALIGN ENERGY SETUP Figure 6 Home Quadrant The mal Detector Head CW Offset Press the OFFSET soft key to use the current power reading as an offset value zero reference to eliminate a con
40. et of digits FieldMaster GS Controls amp Connections cont d Side Panel The side panel of the FieldMaster GS console see Figure 3 has a female DB25 type connector a female DB9 type connector an RCA connector and the power connector Connect the detector to the DB25 connector The FieldMaster GS is de signed for use with only Coherent s Smart D etector Heads Do not plug other types of detectors into the FieldMaster GS console If using a computer for remote control and data transfers connect it to the DB9 connector RS 232 interface To drive an external device such as a strip chart printer connect it to the RCA connector which provides a O to 1V analog output An RCA to BNC adapter is stored in the battery compartment Connect the power supply provided with the FieldMaster GS for regu lated 9VDC 0 4A power Use only the provided C oherent power supply DB25 Detector Socket Use only Coherent Smart Detector Heads DB9 RS 232 Connector Computer Interface RCA connector for Analog Out Power Socket Regulated 9VDC 0 4A Power Supply Use only Coherent AC Adaptor ee 0 Power connector polarity Figure 3 Side Panel Connectors FieldMaster GS Setup The front cover of the FieldMaster also serves as the stand for the unit Rotate the cover down around the back of the unit and place on a conve nient surface The FieldMaster GS may be powered by using the provided AC Adapter or by u
41. etup and control the system There are four primary screens which correspond to the front panel function keys The Menu screen provides basic system wide con trol functions The information displayed on the Home screen is detector head depen dent The other two analysis screens Tune and Trend provide controls which are consistent across all detector heads Over Temperature If the temperature at the detector head sensor exceeds the maximum op erating temperature at any time the screen will go blank and then OVER TEMP will appear in the middle of the screen After 5 seconds the unit reads the sensor temperature again If the temperature is still over limit OVER TEMP returns If the temperature is within limits normal op eration resumes Menu Screen Press the MENU Function key to display the Menu screen shown in Fig ure 4 When this screen appears the top item is highlighted to indicate it is the current selection Items on the Menu screen are described below In this screen Press ENTER to enable any changes made and return to the Home screen Press ESCAPE to negate any changes and return to the Home screen On the Cursor Control pad press the up and down arrows to select the next or previous item highlighted press the left and right arrows to move left and right on highlighted digits within a highlighted item The cursor wraps up or down within a list and left or right within a set of digits FieldMaster GS Sc
42. gneeveades 23 Screens TUNE nee Annee a ee sonne ten add nO 24 FRESE se et id da 25 AO pta ica ted oil dro 25 Range aa ett 26 A ad a Mone nad BMRA 26 SOUUP tia tii 27 A EOS 29 FieldMaster GS Contents DT D UT 30 Remote Controle ain ects fie uen 37 traders EA 37 Making the Software Connections ina 37 Message Exchange Protocol siii 37 Data Connections cti tages st gnccguspesestevacgaesens sveusaeseteesses 38 Remote Control Language Syntax hassan hante 39 Commands and Command Parameters 39 Query Commands stress sateen 40 Case Sensit Vi metiste irnos 40 Program Messages sn eee tiens 40 Remote Control Commands sanan id 41 Remote Control Error Codes dessin s 42 Command Eats yaris NO 42 Remote Control Screen Display ns 43 System Configuration Commands cocconccconononononincnnncannncnnons 43 System Configuration Queries ria 45 Data Collection Commands orinal tinas 47 Data Collection Queries ooocnocnnnnnonoonnonnoncnononnnonnonocnnonnnnnnos 50 Simple RS 232 Program Example patina arial ici 58 Simple RS 232 Program Example Cont d 59 Simple R 232 Program Example Cont d occococicinonannnnnninononas 60 Determining Firmware Vets O Maio sfano codiciada 61 MAS MANS ur A 61 Trouble Shooting culta 62 Specifications tii 63 Appendix A FieldMaster GS Block Diagram and Circuit Operation Appendix B Help File Sales amp Service Information Warranty FieldMaster GS General Description
43. hours charging Visually check all cartons for damage before unpacking If there is no visible damage remove all items from the cartons and inspect for damage Advise Coherent of any damage immediately A Returned Material Authorization will be issued for any damaged instruments see the last page of this manual for Service FieldMaster GS Contro Is LASER POWER ENERGY ANALYZER amp Connections Screen Display Soft Keys BE an r G2 Figure 2 Front Panel Controls On Off o Function Ke Front Panel In addition to the LCD graphics screen all controls for the Field Master GS are on the front panel see Figure 2 Controls consist of e Soft Keys The four soft keys shaped like arrow heads are immediately under the display screen Use these keys to select set and change various operating functions displayed on the screen Function Keys Use these oval keys to select one of the four main display and analysis screens These are hot keys i e always active e ON OFF Use this oval key to turn FieldMaster GS power On and Off e Cursor Control Pad This circle with a small arrow head in each quadrant controls the movement of the cursor on a display Use the up and down arrows to select the next or previous item highlighted the left and right arrows to move left and right on highlighted digits within a highlighted item The cursor wraps up or down within a list and left or right within a s
44. ical elements Use the left and right cursor control keys to move within the digits Attenuationa affects the tune trend and analog out Press ENTER to accept the changes and return to the Home screen As long as the same detector is connected the values entered here are saved during On Off cycles If a different detector is installed default values will be used until changed To negate any changes and return to the Home screen press ESCAPE Align When Align soft key is first pressed from the Home screen the soft keys change to ALIGN POSITION AND CANCEL Press Cancel to return to the Home screen Align and Position soft keys are discussed below Align Screen The Align screen shown in Figure 7 displays the position of the beam on the detector and allows use of quadrant thermal detector heads for optical system alignment The displayed target at 1X resolution represents the clear aperture of the detector with aperture size shown in mm just below the target Use the REL soft key to toggle the representation between Absolute and Relative modes The Absolute mode shows the actual position of the beam on the detector and the Relative mode shows the initial position of the beam at the center of the target see examples below The current mode Rel or Abs appears to the right of the diameter value Default mode is Absolute Abs Rel 13 FieldMaster GS Screens HE Quadrant CW a Align Y 0 00mm cont d 19 00mm Abs Zoom
45. ill be the average of 10 measurements Press the FIT to key to toggle through the following three types of FIT NORMAL Sets the minimum and maximum values on the vertical axis of the graph to 0 and sets the range to the standard at which the measurement was collected 3 SIGMA Sets the minimum and maximum values on the vertical axis of the graph equal to the 3 standard deviations of the displayed measurements MIN MAX Sets the minimum and maximum values on the vertical axis equal to the minimum and maximum values of the displayed measurements 31 32 FieldMaster GS Screens Trend Graph cont d 000 mJ MODE TIME TIME 000 07m DV POINTS 400 PLOT ALL DURATION 00 00 40 FIT NORMAL INTERVAL 00 00 00 1 Figure 21 Graph Trend Screen Pulse Detector FieldMaster GS Screens Press the ZOOM soft key to select a particular 200 measurements to Trend Zoom view When pressed the screen similar to Figure 22 appears Press the arrow soft keys to move the 200 measurement points window to the area of the graph you want expanded Note that a single pressing of these keys moves the data window 10 points You may also press and hold the key down until the window includes the desired measurement points Just below the graph the screen shows which 200 measurement points have been se lected for expanded viewing For example in Figure 22 the data window includes measurement points 80 280 Press the Select soft
46. ine Technologique de Saclay B timent AZUR 4 rue Ren Razel 91892 Orsay Cedex France Tel 33 1 60 19 40 40 Fax 33 1 60 19 40 00 Japan Toyo MK Building 7 2 14 Toyo Koto ku Tokyo 135 Japan Tel 81 0 3 5635 8680 Fax 81 0 3 5635 8681
47. m Each power detector head contains a tempera ture sensor electrically erasable programmable read only memory EEPROM and either a pho todiode thermopile or pyroelectric cell At power On the program interrogates the EEPROM to determine which type of detector is present Amplifier gains and analog switches mux are adjusted to match the informationreceived from the EEPROM The 16 bit analog to digital con verter A D switches between channels 1 and 2 to measure either sensor output or tempera ture This data is then sent through the Inter face to the Microprocessor The program in the Microprocessor controls the mux amplifier gains and A D converter chan nels Display read only memory ROM ran dom access memory RAM and Interface elec tronics are selectively reached by the Micropro cessor through the Decoder The Decoder in terprets the Microprocessor address lines to de termine which device the Microprocessor wants to talk to All signals coming from or going to sources ex ternal to the Microprocessor front panel switches head sensor data analog output meter drive and speaker go through the Interface The Interface provides the conduit through which the Microprocessor talks to the outside world AnLCD controller provides display refresh from display memory and the Interface to the Mi croprocessor When data needs to be written to the display the controller writes the data to dis play memory bet
48. nd PULSE using either the DEC or INC soft key In the Time mode operation is the same as with a CW Detector see above except that when the pulses stop the Trend function continues to record the value of the last pulse measured In the pulse mode the Trend function measures and records the value for each pulse at the pulse rate up to 10 Hz If the pulses stop the measuring and display processes stop and then resume when the pulses begin again POINTS Use this parameter to set the number of points to be displayed selectable from 200 to 2000 in 200 point increments DURATION Use this parameter to set the duration of data collec tion This is a user selectable value from a minimum of 20 seconds to a maximum of 99 hours Allowed duration values must be exactly divisable by selected array size INTERVAL Sets the interval between data collection points Select able in 0 1 second increments from 0 1 second to 29 42 0 1782 sec Note that array size must be set to 200 in order to reach this interval Parameters in the right column are TIME This parameter is determined by the number of points and either the interval or duration selected PLOT Indicates whether the data points are all displayed or aver aged see pages 31 and 32 FIT Use this parameter when in the Trend Graph screen to toggle through three types of FIT When Setup is complete press ENTER for selected setup parameters to take effect or press ESCAPE to re
49. or energy as well as indicators for warning or error conditions and graphic analysis of data collection Beam Alignment Thermal disk CW sensors provide a quadrant display of beam position on the detector head Centering the beam on the detector head achieves maximum accuracy Broad Wavelength Range FieldMaster detectors cover the spectrum from 0 19 to 10 6 umeters Ease of Use FieldMaster GS controls on the front panel and the simplified menu struc ture provide ease of use with minimal training All adjustments for differ ent detector heads are handled automatically using Smart D etector Tech nology Portability The compact lightweight console and internal rechargeable battery pack create a system that is easily transported from lab to lab or around the world FieldMaster GS General Reliability Description The FieldMaster GS with its integral cover is designed to withstand cont d the rigors of travel and regular field use Coherent s rugged detector head design has been the industry standard for more than 30 years Accuracy The combination of Smart Detector Technology laser wavelength entry and accurate beam positioning information create a highly ac curate laser measurement system Unpacking The FieldMaster GS console and detector heads are shipped in foam inserts Batteries are installed in the console prior to shipment To insure correct battery operation the batteries require an initial over night 16
50. osition value at index start position send current position data value send power read current range set the current range FieldMaster GS Help File cont d Hit any key to continue Valid commands spaces are significant q restart system t lt 12 bit gt write to contrast dac tr lt p t gt set trend mode pulse time tp lt number gt set trend number of points lt 200 2000 gt tp send trend number of points tpa send trend stats average power tpm send trend stats maximum power tpl send trend stats minimum power tpd send trend stats power standard deviation tps send trend stats power 2 sigma stability tea send trend stats average energy tem send trend stats maximum energy tel send trend stats minimum energy ted send trend stats energy standard deviation tes send trend stats energy 2 sigma stability tfa send trend stats average frequency tfm send trend stats maximum frequency tfl send trend stats minimum frequency tfd send trend stats frequency standard deviation tfs send trend stats frequency 2 sigma stability ti send trend interval tf lt number gt send trend frequency at 0 number of points ti lt mm ss s gt set trend interval ts start trend send ts 2 times te end trend B3 FieldMaster GS Help File td lt hh mm ss gt set trend duration cont d td send trend duration tv lt
51. play just below the analog scale Note that the current auto range scale or the selected manual range scale is displayed at the right side of the analog scale Trend Screen The Trend screen provides two methods to monitor and analyze measure ments Plot see page 28 and Scroll see page 29 When the Trend func tion key is pressed the Trend screen similar to Figure 18 appears Measurements are calculated at 10 Hz but only recorded and plotted for Interval Duration and number of points selected The number of points is set by the user while the Interval is dependent on the Duration setting and vice versa That is based on the number of points changing the In terval and pressing Enter automatically changes the Duration and chang ing the Duration and pressing Enter automatically changes the Interval Trend data collection fills an array of 200 to 2000 points array size is user selectable in 200 point increments Trend data collection Duration is user selectable value from 20 seconds minimum to 99 hours 356 400 seconds maximum Duration value must be exactly divisible by the array size Trend data collection Interval is user selectable from 0 1 second mini mum to 29 min 42 sec 1782 sec maximum Interval and duration are interdependant Duration product of the interval and selected array size Duration Interval x Selected array size e g selected array size is 200 points Interval is 0 1 seconds Duration therefore equals 2
52. quency HAHHHAAHtO HA Ranges none Example Request the trend average frequency tfa Response 2 000000e 01 Request trend stats frequency maximum tfm Header tfm query trend maximum frequency Parameters none Returns frequency HAHHHAAtO AA Ranges none Example Request the trend maximum frequency tim Response 2 020000e 01 FieldMaster GS Remote Control cont d Request trend stats frequency minimum tfl Header Parameters Returns Ranges Example Response tfl query trend minimum frequency none frequency HHHHHH etH none Request the trend maximum frequency tf1 1 990000e 01 Request trend stats standard frequency deviation tfd Header Parameters Returns Ranges Example Response tfd query trend standard frequency deviation none frequency HAHHHARAtO AA none Request the trend standard frequency deviation tfd 0 010000e 00 Request trend stats frequency 2sigma stability tfs Header Parameters Returns Ranges Example Response tfs query trend 2sigma stability frequency none energy HHHHHHeHHE none Request the trend frequency stability tfs 2 300000e 00 57 FieldMaster GS Simple RS 232 Program Example Y Program to read FieldMaster GS power through the RS 232 Displays current min and max Written for Microsoft QBasic v 1 0 the one that comes free with DOS DECLARE FUNCTION GetInput
53. reens Menu cont d a G lg Too OF er eo oo TIN ONZY thn vd 5 q AM Hope CT ee I B C A A T S nhHO THA lt tBQqorto QAO KERK Boe O h t w AWA nou K KDHEOBE ESCAPE ENTER DEC OFF INC ON Figure 4 MENU Screen Invert Display Use this item with the INC ON and DEC OFF soft keys to turn the reverse display mode On or Off This is a personal preference parameter Default mode is Off with black text on a white background Note that this setting is retained in nonvolatile memory during On Off cycles and regardless of the detector connected Backlight Use this item with the INC ON and DEC OFF soft keys to turn the backlight Off and On Default mode is On and recommended for nor mal use and under low ambient light conditions In this mode battery power will last approximately 4 hours Note that this setting is retained in nonvolatile memory during On Off cycles and regardless of the detector connected Contrast Use this item with the INC ON and DEC OFF soft keys to increase or decrease the contrast from 0 dark to 100 light Default setting is 50 Note that this setting is retained in nonvolatile memory during On Off cycles and regardless of the detector connected FieldMaster GS Screens Menu cont d 10 Auto Off Use this item with the INC ON and DEC OFF soft keys to change the time in minutes that the unit will stay on between key presses before automatically turning
54. sing the factory installed rechargeable batteries If using the AC Adaptor plug it into a 110 VAC outlet in Europe 220 VAC and con nect it to the AC Adapter connector on the left side of the FieldMaster GS see Figure 3 If using battery power The Home Tune and Trend screens provide a LOW BATTERY WARNING indication when there is 10 of battery life remaining Plug the unit into an AC outlet to recharge the batteries Plug the detector head into the DB25 connector on the left side of the console The unit is now ready to turn power on CAUTION Insure that your detector head is rated for the power or energy density of your laser Power or energy density greater than the rating of the sensor will damage the detector head Turn On Press the On Off key on the front panel The unit beeps once and the screen displays the System Status of the FieldMaster GS for approximately 5 seconds A query is sent to the EEPROM in the detector head If no detector head is plugged in or either the detector head or detector cable is defective the message NO DETECTOR will be displayed on the System Status screen and the unit will beep continuously every 10 sec onds When the self tests are completed and the parameters for the detector have been loaded the Home screen appears FieldMaster GS Screens Screens Menu Operation and use of the FieldMaster GS is through the various display and analysis screens and the ability they provide to s
55. stant background reading When first pressed the screen displays zero and the offset value is shown at the bottom of the screen The second time the key is pressed the offset value is returned to zero regardless of the power input at the time the key is pressed and the screen displays 0 offset Setup Use the SETUP soft key to change the parameters for Display Average Wavelength and Attenuation When pressed Display Average is high lighted selected Use the up and down cursor control keys to select pa rameters and the INC DEC keys to change values of the highlighted pa rameter D isplay Average Enter the number of readings to be averaged for the displayed power or energy value Valid entries are 1 2 5 10 20 50 100 and 200 Measurements are calculated at 10 Hz i e 10 per second The display is updated at 3 Hz with the value of the most recent average The Display Average is the number of 10 Hz measure ments to be used in the average using the running average method The display itself is still updated at 3 Hz NOTE Display averaging affects the Trend function It does not affect the Tune function FieldMaster GS Screens Quadrant CW Align Wavelength Enter the wavelength of the laser measured Use the left and right cursor control keys to move within the digits NOTE This entry must be exact to insure accuracy Attenuation Enter the amount of optical attenuation due to beam splitters attenuators or other opt
56. te power range Serial Ensure host baud rate communication 9600 stop bit 1 problems parity none To detemine that you have communications issue h to the unit and it will return the list of commands available Analog out issues The load resistance should be gt 150K ohms for 1 accuracy See the AlogOut selection in the MENU function to set the range False pulse trigger High ambient levels of Ground detector to AC 60 Hz EMI ground Pulse head manual When using Auto range up to three pulses of the same range trigger amplitude may be required before the correct range is determined and a measurement displayed In Manual range the first pulse issued will be measured and recorded as long as it is greater than 10 of the full scale range value FieldMaster GS Specifications Display Type Display Options Ranges Digital Display Analog Display Display Accuracy Display Average RS 232 Interface Analog Out Pulse Detector CW Thermal Detector Trend Statistics Memory Operating Temperature High speed high contrast back lit liquid crystal display 240 x 200 pixels Software control of contrast normal or reverse display screen backlighting Microprocessor controlled Display ranges deter mined by EEPROM in sensor heads No range limitation on display lt 3 Hz update rate 3 significant digits 10 Hz update rate needle movement 1
57. turn to the previous Setup values FieldMaster GS Screens Trend Scroll Scroll The SCROLL soft key on the Trend screen allows you to monitor mea surements in a continuous mode When pressed measurements are col lected and continuously presented at the selected interval beginning on the right of the graph Figure 19 is an example of a Scroll which has collected more than 200 measurements The last 200 are shown with the newest one entered on the right In Figure 19 the FASTER and SLOWER soft keys allow you to increase or decrease the Time DV value of the TIME parameter which in turn corresponds to the divisions on the horizontal line of the graph Note that in Pulse mode the Scroll function stops if no pulses are received and then resumes when pulses resume The CANCEL soft key stops the Scroll function and returns to the Trend screen Figure 18 NOTE Interval is the only set up function that affects the scroll screen Other parameters can be changed but they have no effect on the scroll function 000 mJ MODE TIME TIME 000 07m DV POINTS 400 PLOTIALE DURATION 00 00 40 FIT NORMAL INTERVAL 00 00 00 1 CANCEL SLOWER FASTER Figure 19 Sc roll Trend Screen 29 FieldMaster GS Screens Trend Start 30 Start Press this key to begin measurement collection using either the default settings for the parameters or the settings you entered through the Setup soft key When pressed measurements begin as obs
58. using data provided by the Microprocessor The FieldMaster GS is calibrated at the factory and it stores these calibration values in an on board EEPROM Rechargeable batteries are provided The FieldMaster GS can be operated with the external power supply and simultaneously recharge the batteries A user adjustable automatic shutdown timer controls how long the FieldMaster will stay fully powered up between key presses This feature designed to conserve battery power is automatically disabled when the external power supply is connected FieldMaster GS Appendix B Help File FieldMaster GS Help File B2 The help file available through a computer connected to the RS 232 bus is as follows Valid commands spaces are significant a at lt float attenuation gt at b cw cwc cwz cwe dt en h of lt on off gt of pa lt readings to average gt pa pd lt hh mm ss gt pd pe po lt number gt ps pv pw rn rn lt float gt 0 0 for auto read the 16 bit adc set the attenuation value read the attenuation value test the buzzer start cw energy clear cw energy zero CW energy end cw energy read detector name read energy show this HELP set the offset value to current zero read the offset value set the display average value read the display average value set position run duration send position run duration end position run send p
59. ween display update cycles A2 Power Head Photo Diode CW Head EEPROM amr GAIN CONTROL ATTENUATION GAIN CONTROL FieldMaster GS FieldMaster GS Block Diagram MICROPROCESSOR Display 80C51XA o cs ROM cs DECODER que ADD EL Backlight Dr So cs RS 232 SERIAL PORT INTERFACE cs DATA ADDRESS EEPROM 2 12 bit D A PEAK DET 9 1 Analog Out Panel Switches Speaker A3 FieldMaster GS A4 Operation The thermoelectric detector heads have four outputs that determine beam position and laser power The Microprocessor scans the mux through the four outputs and the temperature signal to arrive at a power reading with the Gain Amplifier set to provide maximum signal strength The A D then converts the outputs for the Microprocessor Photodiode detector heads have one output They use a current to volt age converter to precondition the output before it reaches the Gain Am plifier The A D then converts the output for the Microprocessor Pyroelectric detector heads require a 1 M ohm input to work correctly This is provided by a resistive divider for the load and to attenuate the signal Gain changes are made through an amplifier which is AC coupled to a Peak Detector that measures the pulse peak energy The output is then connected to the A D to convert it for the Microprocessor Both the Analog output and the meter are driven by a digital to analog D A converter
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