585 TECPak User`s Manual
Contents
1. TEMPERATURE CONTROLLER Pl 2rr0y0 INSCTUMeNtS Page 2 TECPak User s Manual Table of Contents MAO CUCUION RARE TR Uelesranesueeny 3 Safety Terms and Symbols 4 QUICK Statt nanna a aia dean a E E E ieee 6 Installation nnn e ea A Sd ennn 7 Op rating MOGSS arisia iosia einki iadaaa ea E A E ASEE EEN ER E 9 SOAS E E E E a este beasetenen aks 10 Arroyo Control sise 14 Front and Rear Panels iii 15 Connecting to the TECPAK sise 18 Installing the USB Drivers ccceceeceeseeeeeeeeeeeeeeeeeeeeaeeeeesaeeeaeeeeeeeeseeeaeeneeeeeetaes 18 Working With Thermistors 19 Working With RTDS ananasen aaa ea aa aai 21 User Calibration of Resistance Sensors c ececeeseeeeeeeeeeeeeeeeeeeeseeeeaeeeeeeeeeeeeeas 23 Controlling the Temperature Rate of Change ecceeceeseeeseeeeeeeeeeeeeeeeeeeteeeens 24 External Fan Control ss 24 Resistive Heaters and Heat Cool Only Modes ecceeceeeeeeseeeeeeeeeeeeeeeeeeetneeeas 25 Gain Control and the PID Loop ss 25 Using the AutoTune FUNCTION sise 26 Compensating for Cable Resistance 27 Using the Analog Interface 28 Specifications fire aia had aeaaee ea ennemi mnt 33 Error M SSAGES iieiea oiean oiae seian EEEa EE eTa Ean ERSE 35 Maintenance and Service and Calibration 37 TECPak User s Manual Page 3 Introduction Thank you for choosing2. An attempt was made to change a parameter that cannot be changed or is currently read only The message attempted to set a value that was outside the allowable range USB Serial only When trying to parse the message the data was in an invalid format USB Serial only An invalid number base suffix radix was encountered when parsing a number USB Serial only A sensor open circuit was detected and the output was turned off A Peltier module open circuit was detected and the output was turned off A current limit was detected and the output was turned off A voltage limit was detected and the output was turned off The sensor limit high or low was exceeded and the output was turned off The temperature limit high or low was exceeded and the output was turned off The sensor type was changed causing the output to be turned off The temperature went out of tolerance and the output was turned off Pri 2r10 0 INSCruUMENIS Page 36 TECPak User s Manual Error Code E 415 E 416 E 419 E 433 E 434 E 435 E 997 E 998 E 999 Description Sensor short output turned off Cal failed TEC not stable Not a TEC Ite limit exceeds cable rating Mode Change Control error cycle power Command not supported Non specific error Cause A sensor short circuit was detected and the output was turned off An error occurred during calibration that caused the calibration to fail The un
3. s Manual Page 19 Working With Thermistors The TECPak is designed to work with negative temperature coefficient NTC thermistors such as the BetaTHERM 10K3A1 thermistor used in the LaserMounts A thermistor works by translating temperature into resistance with resistance decreasing as temperature increases hence the negative coefficient Here is a typical response curve of a thermistor 50000 40000 30000 20000 Resistance Q 10000 0 10 00 10 00 30 00 50 00 70 00 90 00 110 00 Temperature C Typical Resistance vs Temperature Graph As can be seen be the graph the resistance of the thermistor drops very quickly In the typical control range 0 C to 70 C typical 10K thermistors offer good sensitivity to changes in temperature and this is the range in which most 10K thermistors are typically used 10K thermistors can be used at much higher temperatures but will suffer poorer temperature stability performance because of the lower sensitivity When evaluating the performance of a thermistor it is important to understand the resistance sensitivity of the thermistor at your application temperature which varies greatly by temperature and thermistor types Pl 2rr0y0 Instruments Page 20 TECPak User s Manual The TECPak supports operation using a 10uA or 100A constant current source which limits the upper control range to 450kQ and 45kQ respectively To minimize noise an
4. For USA customers a power cord is included For non USA customers an IEC 60320 C13 rated AC power cord must be provided Accessories Arroyo Instruments also sells several accessories designed to work with the TECPak These include e 1260B TECSource Cable 5A 2m This cable has DB 15 male female connectors for interfacing to the LaserMount or other connectorized fixtures and supports up to 5A of TE current and connections for the fan interface A pigtailed version of Pl 2r10y0 INSCruUMeNIS Page 4 TECPak User s Manual this cable with tinned ends for soldering into custom solutions is available as p n 1261B 1262B TECSource Cable 10A 2m Similar to the 1260B cable but adds wiring for 4 wire RTD sense and therefore only needed for RTD applications Also adds 10 Amp operating capability A pigtailed version of this cable with bare ends for soldering into custom solutions is available as p n 1263B Pak Series Rack Mount Kit 3 or 5 units p n 1402 RM For installing your TECPak or LaserPak into a standard 19 rack The kit accepts either 3 units for a 2U installation or 5 units for a 3U installation 10kQ Thermistor p n 1600 Accurate to 0 2 C RS 232 NULL Cable 3m p n 1200 NULL USB Cable 3m p n 1201 Safety Terms and Symbols The following safety related terms are used in this manual e Warnings noted by the WARNING heading explain dangers that could result in physical injury or death e Cautio
5. TEC D loop Will only be available if Gain is set to PID Sensor Sets the temperature Therm TEC SENS measurement sensor Can be 100UA Therm 100uA Therm 10uA Therm RTD or RTD 4 wire T Low Lim T Low Lim is the lower 99 C TEC LIM TLO temperature limit If operating in T Mode and the actual temperature drops below this value the output will be turned off Temperature limits not monitored in R Mode or Ite Mode Limit monitoring can also be disabled in software see TEC ENAB OUTOFF command T High Lim T High Lim is the upper 125 C TEC LIM THI temperature limit If operating in T Mode and the actual temperature rises above this value the output will be turned off Temperature limits not monitored in R Mode or Ite Mode Limit monitoring can also be disabled in software see TEC ENAB OUTOFF commana Pl 2rr0y0 Instruments Page 12 TECPak User s Manual Name R Low Lim R High Lim Tol Time Tol Temp H C Mode Description Factory Computer Default Command R Low Lim is the sensor low 0 01kQ TEC LIM RLO limit If operating in R Mode and the actual sensor measurement drops below this value the output will be turned off R limits are not monitored in Ite Mode Limit monitoring can also be disabled in software see TEC ENAB OUTOFF commana R High Lim is the sensor high 45kQ TEC LIM RHI limit If operating in R Mode and the actual sensor measurement exceeds this value the output will be turned
6. is enabled Most parameters can be changed using a standard command as defined in the Computer Interfacing Manual or through the Settings dialog within Arroyo Control Below is a list of the most common settings and the corresponding computer command to change it Name Description Factory Computer Default Command Basic Settings Mode This set the operating mode T T Mode TEC MODE Mode R Mode or Ite Mode of the temperature controller Mount Specify the mount connected to User TEC MOUNT the TECPak If using a Defined LaserMount select the appropriate model Otherwise select User Defined Lim Lim sets the current limit of 3A TEC LIM ITE the temperature controller The limit should be set to a value that is suitable for your Peltier device Gain Gain controls the response of 30 TEC GAIN the temperature controller A higher gain value will cause the controller to respond more quickly to the difference between the set point and the actual temperature while a lower value will cause it to respond more slowly Select PID for direct access to the PID parameters Read more on setting gain below PID P The proportional term of the 1 TEC P PID loop Will only be available if Gain is set to PID TECPak User s Manual Page 11 Name Description Factory Computer Default Command PID The integral term of the PID 0 01 TEC I loop Will only be available if Gain is set to PID PID D The derivative term of the PID 0
7. the External Fan Control section below for more information The resistance of the cable and connectors in ohms This setting allows for accurate voltage measurement at the TEC by removing the voltage loss of the cable Selects a desired temperature ramp rate in degrees Celsius per minute Set to 0 0 C min to disable rate limiting Sensor Settings A term in thermistor equation B term in thermistor equation C term in thermistor equation A term in the RTD equation B term in the RTD equation TECPak User s Manual Page 13 Factory Computer Default Command Off TEC FAN 12 0 TEC FAN Auto TEC FAN 5 minutes TEC FAN 0 00800 TEC CABLER 0 0 C min TEC TRATE 1 12924E 03 TEC CONST 2 34108E 04 TEC CONST 0 87755E 07 TEC CONST 3 98480E 03 TEC CONST 0 58700E 06 TEC CONST Pl 2r10y0 INStruUMeNIS Page 14 TECPak User s Manual Name Description Factory Computer Default Command RTD C C term in the RTD equation 4 00000E 12 TEC CONST RTD Ro R term in the RTD equation 100 00 TEC CONST Communications Settings Baud This sets the baud rate for the 9600 N A fixed at RS232 serial port See the 9600 Computer Interfacing Manual which is included on the CD that accompanied this product Err While To turn off the display of errors Yes REMERR Rmt while in remote mode set this value to No To display errors while in remote mode set this value to Yes Terminal Terminal mode simply echoes No TERMINAL Mo
8. the TECPak from Arroyo Instruments Your TECPak is a combination of leading edge technology combined with years of experience in the field of temperature control and based on the proven designs found in the 5240 and 5300 Series TECSources The TECPak was design for system integration applications or simply where a user interface like that found on the 5300 Series TECSources is not required or desired With high TEC power options both RS232 and USB computer interfaces analog interface and small footprint the TECPak will fit into almost any temperature control application TECPak s analog interface provides a way of both controlling and monitoring the state of the instrument with analog temperature set point actual temperature monitoring stable indicator and on off control and status This allows for control in applications that do not have a computer interface The TECPak offers all the features you would expect from a modern temperature controller including e Support for both thermistor and RTD sensors e 4 wire measurement mode for RTD sensors e AutoTune for automatic PID parameter calculation e 0 004 C temperature stability e 0 01 C resolution for both set point and actual temperatures e 4A 8V and 5A 12V standard configurations with custom configurations available What s in the Box Along with the TECPak itself a CD with electronic copies of this manual the Computer Interfacing Manual and USB drivers are included
9. wired in a NULL modem configuration Pin Description 2 Receive 3 Transmit 5 Ground 1 4 6 Commoned together 7 8 Commoned together 9 No connection Shell Earth ground RS232 Connector DB 9 Male For more information on using the RS232 interface see the Computer Interfacing Manual which is included on the CD that accompanied this product LED Indicators There are two LEDs the upper green AC Power LED that is lit whenever the AC power is turned on and a lower green or red On Error LED that will light green when the unit is on and operating normally or red when an error has occurred If the unit is operating but has unacknowledged errors then the On Error LED will be primarily green but briefly flash red approximately once per second to indicate the unit is operating normally but previously encountered an error errors are automatically cleared by Arroyo Control or can be cleared by sending an ERR or ERRSTR query Pl 2rr0y0 Instruments Page 18 TECPak User s Manual Connecting to the TECPak Arroyo Instruments carries two cable assemblies specifically designed for connecting the TECPak to temperature controlled fixtures or devices The 1260B or 1262B TECSource Cable not included is a two meter cable designed for use with Arroyo Instruments mounts and has DB 15 connectors on both ends one male and one female The 1262B is typically only used for applications requiring the 4 wire RTD measurement mode For cust
10. A or 100UA for thermistors or 1mA for RTDs Once the resistance is known then the temperature can be calculated using the appropriate equation discussed in the thermistor and RTD sections above If you wish to make a highly accurate measurement then you will need to calibrate the voltage reading from the instrument You can do this using two known fixed resistor values measuring the Analog Monitor Output for each resistor and calculating the calibration coefficients for a simple linear equation to correct for any measurement error Contact the factory for a self guided Excel worksheet that will capture the values and perform the calculations for you Pl 2rr0y0 Instruments Page 32 TECPak User s Manual Connecting to the Analog Interface Connecting to the Analog Interface is very straightforward Because the inputs and outputs are buffered you do not need any external filters or buffers unless your application requires it The logic level interfaces are all high impedance as is the Analog Set Point Input The Analog Monitor Output is an op amp driven through a 1kQ resistor to protect against output shorting A typical application might look like this Set Point TECPak Analog Interface On Off Control CPU or On Off Status 1 0 Board Stable Status Monitor Ground Ground TECPak User s Manual Page 33 Specifications All values relate to a one hour warm up period Specifications fo
11. Make these connections as close to the sensor as possible The drawings below illustrate how 2 wire and 4 wire connections work Note that 4 wire measurements require all four wires to be brought through the cable to the mount The 1262B and 1263B cables carry this connection through to the mount but the 1260B and 1261B cables do not Sensor RTD Sensor Sensor RTD Sensor RTD 4 wire Measurement Because the Analog Set Point input shares the measurement input with the remote sensor input when using RTD 4 wire measurement mode the Analog Set Point Input is disabled TECPak User s Manual Page 23 User Calibration of Resistance Sensors In some applications having the ability to compensate or calibrate the sensor measurement is desired such as referencing to an internal standard or to match the readings of another instrument This is supported on the TECSource by using the TEC USERCAL PUT command to apply an offset and or slope compensation to thermistor or RTD readings The calibration is applied to the resistance measurement of the sensor not the temperature To adjust the resistance to temperature conversion change the thermistor or RTD coefficients as needed To prevent accidental modification of the sensor calibration calibration must first be enabled with the TEC USERCAL EDIT command By default the slope and offset values are 1 000 and 0 00 respectively but can be adjusted to change the
12. Size H x W x D inches mm Weight lbs kg Operating Temperature Storage Temperature 20 192 0 01 0 03 0 1 10 50 4 8 5V 350mA max Female DB 15 USB 2 0 Full Speed Type B RS 232 DB 9 male 90 240 V 50 60 Hz 50W 85W 3 0 77 x 4 5 115 x 8 5 216 10 C to 40 C 20 C to 60 C Error Messages TECPak User s Manual Page 35 Error Code E 100 E 102 E 104 E 123 E 124 E 126 E 127 E 201 E 202 E 204 E 402 E 403 E 404 E 405 E 406 E 407 E 409 E 410 Description General Error Message too long Type not allowed Path not found Data mismatch Too few or too many elements Change not allowed Data out of range Invalid data type Suffix not valid Sensor open output turned off Module open output turned off I limit output turned off V limit output turned off Sensor limit output turned off Temperature limit output turned off Sensor changed output turned off Temperature was out of tolerance output turned off Cause The error code is non specific and is generally used when no other error code is suitable The message is too long to process USB Serial only The RADix type was invalid The message used an invalid path command USB Serial only The message contained data that did not match the expected format USB Serial only The command requires more or less than the number of parameters actually supplied
13. current overloading during the test Change the instrument to ITE mode and set the current to 4A Depending on your setup you may first need to change the Mount to User Defined and adjust the limit to 4A Turn on the output and after the voltage has stabilize make a note of it and turn the output off Enter the measured voltage into the following equation to calculate Cable R Cable R Voltage 4 The Cable R value can be changed using Arroyo Control or with the TEC CABLER command Typical values for Cable R are 0 008 to 0 040 but depend on your actual configuration Pl 2rr0y0 INStruMeNIS Page 28 TECPak User s Manual Using the Analog interface The Analog Interface is a feature not found on our bench top temperature controllers as it is designed to be used in applications where a user interface or even a PC is not required The Analog Interface has two sections the logic level control status pins and the analog control monitor pins plus an auxiliary power supply The 5V auxiliary supply is provided for external low power electronics Current draw on this supply must not exceed 100mA The Ground pin provides the ground reference for both the logic level and analog inputs and outputs The logic level inputs operate off a low or high voltage input A logic zero below 1V is considered to be off or false while a logic one above 2 5V but do not exceed 5V is considered to be on or true For logic level outputs a false wil
14. d maximize stability you should select highest current while still allowing you full operation across your required temperature range The typical setting is 100A but your application will determine the actual needs The Steinhart Hart Equation As can 6be seen from the temperature versus resistance graph above resistance varies inversely with temperature in a non linear fashion This relationship can be accurately modeled by polynomial equations and one such being the Steinhart Hart equation A B In R C In R The coefficients A B and C can usually be obtained from the thermistor manufacturer The TECPak defaults to the coefficients for the BetaTHERM 10K3A1 thermistor A 1 12924x10 B 2 34108x10 C 0 87755x10 You can change the coefficients using the TEC CONST command or through the Settings dialog within Arroyo Control TECPak User s Manual Page 21 Working With RTDs Like thermistors RTDs also function by converting temperature into resistance but unlike thermistors RTDs increase in resistance as temperature increases RTDs are also a fairly linear device meaning they can be used across a much broader temperature control range According to IEC751 the resistance temperature relationship is determined using one of two equations dependent on the temperature or resistance value being measured For resistances above the R value resistance at 0 C typically 100Q of the RTD the following equation is u
15. de any characters received over the serial or USB interfaces Msg Term This controls the output CR LF TERM message termination and can be set to CR LF CR LF or None Arroyo Control While most of the settings of the TECPak can be changed over the computer interface using your own program see the Computer Interfacing Manual for more detail in many cases you simply want to operate the instrument from the PC like any other bench top instrument As mentioned earlier in this manual Arroyo Control is a free software application that gives you 100 operating control of the TECPak allowing you to change limits settings and set points as well as monitor the operation of the instrument From Arroyo Control you can also enable the analog interface and set the precision of the analog set point You can install Arroyo Control from the CD or download it from our web site go to the Software section TECPak User s Manual Page 15 Front and Rear Panels The TECPak features four connections in addition to the input power connector They are USB RS 232 analog and output connectors The first three are located on the front of the unit while the output connector is located on the rear of the unit In addition the front of the unit has the input power connector and two status LEDs TECPak Front Panel TECPak Rear Panel Pl 2rr0y0 Instruments Page 16 TECPak User s Manual TEC Output Connector The Output connecti
16. done by Arroyo Instruments or personnel authorized by Arroyo Instruments Modifications done by non authorized personnel will void the warranty Please see the Service section later in this manual for instructions on how to obtain service for this instrument Pr 2r10y0 INStruMeNIS Page 6 TECPak User s Manual The TECPak was designed with ease of use in mind and you will likely have little need for this manual for almost all of the features the unit offers This section will show how you can quickly get the unit up and running in almost no time The TECPak has a universal input power supply accepting 90 to 240 VAC and 50 or 60 Hz This covers all conventional power worldwide but ensure your AC power meets these requirements Plug the AC cord into the unit and into the wall outlet Turn on the power switch located on the IPC and the unit will power up The AC Power LED should light and the On Error LED should remain dark Control of the TECPak can be done two ways use the RS232 or USB computer interfaces and control the instrument from the PC or use the analog interface This quick start guide uses the computer interface More information on the analog interface can be found later in the manual Install the Arroyo Control software located on the CD that came with the instrument it can also be downloaded from our web site located in the Software folder on the CD Once the software is installed plug the instrument into yo
17. ent mode Ite Mode Changing the control mode can only be done through the computer interface either through Arroyo Control or by sending the appropriate TEC MODE command Constant temperature mode uses the sensor constants to calculate the resistance of the sensor at the desired or actual temperature While most users will only need the temperature control mode the constant resistance mode allows you to bypass the sensor equation and directly select the sensor set point This can be useful when only the desired sensor value is known or when the sensor to temperature conversion values are not available for your sensor Using Limits The TECPak supports three different types of limits temperature sensor and current There is both a temperature high and temperature low limit and if the actual temperature exceeds either of these limits the output will be shut off Likewise both high and low limits exist for the sensor R limits and the output will be shut off if the sensor measurement exceeds either of these limits It is important to properly set these limits to protect your device from damage If you are uncertain on how to set the limits please consult with your local distributor or directly with the factory Pl 2rr0y0 Instruments Page 10 TECPak User s Manual All parameters of the TECPak can be viewed and changed over the computer interfaces In addition the set point can be changed via the analog interface if it
18. ere V is the voltage input in volts and T erponr is the resulting temperature set point in C Tanatoc tich and TanarocLow Can be adjusted using the TEC ANALOG THIGH and TEC ANALOG TLOW commands respectively Pl at f0y0 INStruUMeNIS Page 30 TECPak User s Manual For example if V was 1 00V Tanatoc Hich Was 200 and Tanatoa tow Was 100 then Tgerpoinr Would be 20 C T ronr 1 00 2 5 200 100 100 or Tserponr 1 00 2 5 200 100 100 20 To achieve less sensitivity per C you can narrow the high and low temperature points to the actual operating range you need perhaps Tnaroc Low Of 10 C and Tanacoc Hich Of 40 C for example In addition you can change the resolution of the analog input from 1 C 0 1 C or 0 01 C which is low the sensitivity to noise on the input Both of these changes can be done using Arroyo Control or via the TEC ANALOG THIGH TEC ANALOG TLOW or TEC ANALOG RES commands Because the Analog Set Point input shares the measurement input with the remote sensor input when using RTD 4 wire measurement mode the Analog Set Point Input is disabled Analog Set Point Input in Current ITE Mode For TECPaks running firmware version 1 38 or later the analog set point input allows the user to change the ITE set point using a voltage signal The analog input function must be enabled with the TEC ANALOG MODE command and the instrument set to ITE mode When in this configuration
19. et prior to starting AutoTune AutoTune will intentionally cause your mount to oscillate so the temperature limit should be at least 5 to 10 degrees away from the test point to avoid tripping a limit during the process The TEC AUTOTUNE command starts the process and requires one parameter which is the AutoTune temperature test point The command will immediately put the instrument into AutoTune mode The TEC AUTOTUNE query can be used to monitor the process of AutoTune A response of 1 indicates AutoTune is in progress Once complete the instrument will respond with a 2 if AutoTune failed or a 3 if AutoTune succeeded A response of 0 is returned if the instrument has never started an AutoTune process The AutoTune process can take several minutes and even longer on larger mounts with higher thermal mass Once the AutoTune process is complete the output will remain on If the AutoTune process fails an E 436 AutoTune Failed error will be generated and the output turned off Any of the following can cause the AutoTune to fail e Noisy temperature measurements which make it difficult to accurately measure oscillations TECPak User s Manual Page 27 e Any condition that causes the output to turn off temperature limits sensor limits etc e Systems with very low P or terms In the Auto Tune fails due to thermal system limitations you will need to manually modify the PID parameters as described in the section above or select fac
20. factory preset values that typically cover most applications To use the factory gains if the temperature is quickly jumping up and down the Gain will typically need to be reduced If the temperature is slowly moving up and down try a higher Gain You may need to experiment with several gain settings to find the ideal value and for even finer control you can set the Gain to PID and directly set the PID control values Installation Installation of the TECPak is very straightforward as the quick start section above illustrated This section will provide additional details and considerations for installing your TECPak After unpacking the unit make sure all packing materials have been removed and nothing obscures the ventilation ports on the front and back of the unit The TECPak has a universal input power supply accepting 90 to 240 VAC and 50 or 60 Hz This covers all conventional power worldwide but ensure your AC power meets these requirements Do not exceed 250VAC on the line input It is critical to maintain the proper voltage input into the unit If the actual voltage exceeds 250VAC damage to the unit may occur Powering Up the Unit Connect the AC power cord to the unit Turn the power switch located on the AC power input power connector into the on position The unit will go through a quick power up self test and return to the last known operating state The AC Power LED will light up and the On Error LED s
21. hose built into the 240 and 280 Series LaserMounts When using the TECPak with mounts that require a fan no additional external power supply is needed but a cable with appropriate wiring for the fan such as the 1260B or 1262B TECSource Cable must be used The fan is controlled via the TEC FAN command or via the Settings dialog in Arroyo Control Speed can be set to Off Slow Medium Fast or a value between 4 and 12 volts When set to Off the fan power is never turned on Slow Medium and Fast correspond to 6 5V 7 5V and 8 5V respectively There are five modes 1 Fan is turned on whenever the TEC output is on and turns off when the TEC output is turned off 2 Fan is always on 3 Similar to mode 1 the fan is turned on whenever the TEC output is on but when the TEC is turned off the fan will remaining running for an addition number of minutes as defined by the Ext Fan Off setting 4 Fan is turned on whenever the TEC output is on and cooling off otherwise 5 Fan is turned on whenever the TEC output is on and heating off otherwise When used Delay is in minutes and can be from 1 to 240 TECPak User s Manual Page 25 Resistive Heaters and Heat Cool Only Modes The TECPak supports temperature control using resistive heaters instead of Peltier coolers With resistive heaters cooling is obviously not possible and the TECPak must be configured to not attempt to cool the output or a run away condition will occ
22. hould remain dark until the TEC output is turned on if Automatic Output On has been enabled the On LED may light without user intervention Pl 2rr0y0 Instruments Page 8 TECPak User s Manual Ventilation The TECPak has vent holes on the front and rear of the unit You must not block these vent holes or overheating may occur causing damage to the unit Do not operate the unit above 40 C ambient and ensure the instrument is properly ventilated or the unit may overheat and possible damage to the instrument may occur Rack Mounting A rack mount kit p n 1402 RM for standard 19 racks is available for the TECPak and supports the rack mount of up to five units in either a 2U or 3U high opening depending on the orientation of the TECPak Because the units only ventilate from the front and rear no air gapping is required above or below the units and they can be rack mounted immediately above other equipment no rack spacers required Warm up and Environmental Considerations In order to achieve the highest level of accuracy the TECPak should be powered on for at least one hour prior to taking measurements In addition ensure that the unit is not operating outside the ambient temperature range or humidity conditions TECPak User s Manual Page 9 Operating Modes Control Modes The TECPak offers three control modes constant temperature mode T Mode constant resistance mode R Mode and constant curr
23. it is no longer in calibration mode The TEC is considered stable if the temperature has changed less than 0 02 C for more than 20 seconds The TEC CHAN command attempted to select a non TEC channel The cable plugged into the unit is not rated to carry the current as set by the current limit Use a 1262 cable 1262 cable or custom cable with ID pin connected to analog ground or reduce the current limit below 5A A mode change occurred when the output was on forcing the output off A hardware control error occurred cycle power to resolve If error continues to occur contact factory A command was received that is not supported by this instrument A non specific error was encountered TECPak User s Manual Page 37 Maintenance and Service and Calibration Maintenance The TECPak requires no regular maintenance other than product calibration To clean the instrument use cotton cloth that is only damp not wet with a light solution of soap and water Fuses Under normal operation you should never need to replace a fuse However if either fuse does blow use only T 250V 1 0A IEC 60127 2 5x20mm metric fuses as replacements If after replacing the fuse it continues to blow immediately discontinue use of the instrument and contact service for support Service Service and repair for the TECPak can be obtained by contacting the distributor from where you purchased the instrument or directly from Arroyo Instrumen
24. l be OV while a true will be 3 3V Do not exceed 5V DC on any logic input pin or 3V DC on any analog input pin or damage to the instrument may occur There are three logic level pins On Off Control Input This input controls the on off state of the instrument When this input transitions from off to on then the TEC output is turned on and begins controlling to the temperature set point Similarly when it transitions from on to off the output is turned off It is possible to use the analog interface with the computer interface as the TECPak is looking for a change in the logic input to turn the output on or off as appropriate considered an edge triggered input rather than a evel triggered input It is possible for the computer interface to turn the output on or off as well ignoring the steady state of the logic input However as soon as the logic input changes state then the TECPak s output will also be changed to reflect the new state For example if the logic input goes from false to true turn the output on then the output will be turned on Later if a TEC OUT OFF is received from the computer turn the output off then the output will be turned off even though the logic input is still high Likewise if the computer sends a TEC OUT ON the output will be turned on regardless of the logic input s TECPak User s Manual Page 29 state Later if the logic input goes from true to false then the output wil
25. l be turned off In this way on off operation can be supported simultaneously through the analog interface and the PC interface without conflict On Off Status Output This logic level output reflects the present output state of the instrument When it is on and controlling the temperature this output will be high Stable Status Output The output is considered stable when the temperature has remained within the temperature band around the set point as defined by the tolerance temperature for a specific amount of time as defined by the tolerance time Once the temperature is considered stable then this logic level output will be set to high If the set point is changed or a disturbance causes the actual temperature to fall outside the tolerance temperature then this logic level output will be set to false and the process starts over The output will also be false whenever the output is off In addition there are two analog signals analog set point input and analog monitor output The maximum allowable voltage input range on the analog input is 01V to 3V Be sure not to exceed this range or damage to the instrument may occur Analog Set Point Input in Temperature T Mode The analog set point input allows the user to change the temperature set point using a voltage signal The voltage input range goes from OV to 2 5V and the transfer function is Tseteoint V 2 5 TanaLoc HieH a Tanatoc Low TaNaLoc Low Wh
26. ns noted by the CAUTION heading explain conditions that could result in damage to the instrument other equipment or your device e Notes noted by the NOTES heading are not safety related and are intended simply to point out important information If at any time any of the following conditions exist or are suspected of existing discontinue use of the unit until it can be inspected by qualified service personnel e Visible damage to the unit including damage or stress caused during product shipment e Storage of the unit outside the standard storage temperature or humidity rating or prolonged storage under harsh conditions e Failure to operate properly If needed contact your distributor or Arroyo Instruments for service or repair to ensure the safety of the product is maintained TECPak User s Manual Page 5 Symbols O Power Off Power On Caution refer to manual Earth ground VN Caution risk of electric shock General Warnings This instrument is intended for use by qualified personnel who understand the shock and laser hazards and are familiar with safety procedures required to avoid injury Read this manual completely before attempting to use this product To avoid electrical shock ensure a 3 prong power cord is used and is plugged into a earth grounded receptacle Failure to do so can result in severe injury or death There are no user serviceable parts inside All service and repair work shall be
27. o and adjust the P value so that it reaches the set point as quickly as possible without overshooting the set point an unacceptable amount Gradually increase the Pl 2rr0y0 INStruUMeNIS Page 26 TECPak User s Manual value until the set point is achieved without oscillation In many systems the D term is not needed and may be left at zero For additional information on PID loop tuning consult online resources such as Wikipedia http en wikipedia org wiki PID_controller or search for terms such as Ziegler Nichols method or PID Loop Using the AutoTune Function The TECPak is capable of automatically determining PID parameters for most applications Using a form of the Ziegler Nichols method the TECPak will step through a process to determine the thermal response of the mount which can then be used in a mathematical model to calculate the PID parameters The PID parameters generated by AutoTune are not necessarily the ideal PID parameters and small improvements may be possible by further refining the results manually Before starting the AutoTune function it is best to begin from ambient conditions either with the TEC off and the mount stabilized at ambient or the TEC on and the set point around 25 C While this is not required it can produce better results AutoTune only functions in temperature mode PID parameters must be manually determined for R mode Make sure the current and temperature limits are s
28. off R limits are not monitored in Ite Mode Limit monitoring can also be disabled in software see TEC ENAB OUTOFF commana Tolerance time is the amount of 5 seconds TEC TOL time in seconds that the actual temperature must be within the set point temperature the Tol Temp value for the unit to be considered in tolerance Tolerance temperature is a 0 1 C TEC TOL temperature band in C around the set point temperature When the actual temperature is within this band for longer than the Tol Time setting then the unit is considered to be in tolerance This selects the heating and or Heat Cool TEC HEATCOOL cooling mode of the TECPak See the section below titled Resistive Heaters and Heat Cool Only Modes for more information Name Ext Fan Ext Fan Pwr Ext Fan Mode Ext Fan Off Cable R T Rate ThermA ThermB ThermC RTD A RTD B Description This selects the voltage for the auxiliary fan power supply See the External Fan Control section below for more information When Ext Fan is set to Custom this sets the specific fan voltage from 4 0 to 12 0 volts See the External Fan Control section below for more information Controls when the fan operates See the External Fan Control section below for more information When Ext Fan Mode is set to Delay this setting defines the number of minutes to delay turning off the fan after the TEC output has been turned off See
29. om applications a two meter cable with a male DB 15 on one end and stripped and tinned leads on the other is available as part number 1261B or 1263B Connections to the TECPak and the fixture must be secure Tighten any screws on the DB 15 connectors and make sure all connections are in good condition See the manual for your fixture for additional safety and operational information Installing the USB Drivers Using the TECPak via USB is just as simple as using the serial port In fact once you have installed the USB drivers the instrument will appear as a virtual serial port that you can use just like a normal serial port To install the drivers simply plug in the instrument to your computer When the Add New Hardware wizard appears insert the CD you received with the TECPak and follow the on screen instructions Once the drivers are installed to determine the COM port number go to Control Panel and select System Once the System Properties dialog appears choose the Hardware tab then click on the Device Manager button When the Device Manager appears click on the plus sign to the left of Ports The port identified as an USB Serial Port is the TECPak In the event you have multiple TECPak instruments plugged in simultaneously you will need to experiment to see which instrument was assigned to which port For example you could change the set point when the output was off to see which unit s set point changed TECPak User
30. on is a female DB 15 and has the following pin out DB 15 Pin Description 1 2 amp 9 TE 8 4 amp 10 TE 5 amp 6 Earth Ground 7 Sensor 8 Sensor 11 Fan 12 Fan 14 Remote Sensor 15 Remote Sensor Output Connector DB 15 Female Used in RTD 4 wire operation only RTD and fan functionality is only available on TECPaks with serial number 130203819 or higher Analog Interface Connector The Analog Interface connection is a male DB 15 and has the following pin out On Off Control Input On Off Status Output Stable Output Analog Temperature Monitor Analog Temperature Set Ground 5V Auxiliary Supply Ground Output Connector DB 15 Female ANOaBRWOND Disabled when in RTD 4 wire measurement mode The 5V auxiliary supply is provided for external low power electronics Current draw on this supply should not exceed 100mA The Ground pin provides the ground reference for the logic and analog inputs as well as the auxiliary power supply The analog interface is described in detail in the Using the Analog Interface section below TECPak User s Manual Page 17 USB Connector The USB connector is a standard Type B female connector and can be plugged into any USB 1 1 or USB 2 0 port For more information on using the USB interface see the Computer Interfacing Manual which is included on the CD that accompanied this product RS232 Connector The RS232 connection is male DB 9 connector
31. r standard models Custom models may vary Description Drive Channel Current Range A Compliance Voltage V Max Power W Resolution A Accuracy set point mA Noise Ripple mA rms Temperature Control Range 2C Resolution 2C Thermistor Accuracy 2C Short Term Stability 1hr 2C Short Term Stability 24hr 2C Measurement Channels Current Resolution mA Accuracy reading mA Voltage Resolution mV Accuracy reading mV Sensor 1OuA Thermistor Range kQ Resolution Q Accuracy reading Q 100uA Thermistor Range kQ Resolution Q Accuracy reading Q 585 04 08 585 05 12 12 55 0 01 0 30 lt 5 99 to 250 0 01 0 05 0 004 0 01 10 0 30 10 0 50 0 1 450 10 0 05 50 0 05 45 1 0 05 5 1 Software limits Actual range dependent on sensor type and system dynamics Accuracy figures are the additional error the 5300 adds to the measurement and does not include the sensor uncertainties 3 25 C 100uA thermistor Stability measurements done at 25 C using a 10kQ thermistor on the 1004A setting The number is 1 2 the peak to peak deviation from the average over the measurement period Pr 2r10y0 INSCruUMeNIS Page 34 TECPak User s Manual RTD Range Q Resolution Q Accuracy reading Q Current Limit Resolution mA Accuracy mA Other Fan Supply TEC Connector Computer Interface Power
32. sed R R 1 AT BT Below R an additional term is added to the equation R R 1 AT BT C T 100 T In both of these equations R is the resistance of the RTD at 0 C and A B and C are the coefficients as defined by IEC751 through regression analysis or by using the Callendar van Dusen method By default the TECSource uses the Laboratory standard coefficients which are for a 0 0039260 Q C curve A 3 9848x10 B 0 58700x10 C 4 0000x10 2 and R 100 The TECPak automatically determines which equation to use based on the conditions at the time of the measurement Pl 2rr0y0 Instruments Page 22 TECPak User s Manual 2 Wire versus 4 Wire Measurements One concern in using RTDs are their relatively low resistance typically 1000 at 0 C and small 0 C Because of these two factors the resistance of the cable used to connect to the sensor can become a significant error in the sensor measurement The TECPak offers two RTD measurement modes a conventional two wire measurement mode which is subject to this error anda four wire measurement mode that uses separate sensor and source lines to remotely sense the actual resistance of the RTD and eliminate the cable or connector resistances When using 4 wire measurement mode you must select RTD 4 wire as the sensor type and then connect the Sensor and Remote Sensor at one side of the RTD and Sensor and Remote Sensor to the other side of the RTD
33. sensor measurement The calibrated measurement is computed as follows User calibrated reading slope reading offset The offset is kilo ohms kQ for thermistors and ohms kQ for RTDs Be aware that the there is only a single set of calibration values and changing sensor type does not change the calibration data Therefore if you will be changing between thermistor to RTD sensors you will need to change the calibration values as appropriate for the new sensor setting Changing the values back to 1 000 and 0 00 will return the instrument to factory calibration Pl 2rr0y0 Instruments Page 24 TECPak User s Manual Controlling the Temperature Rate of Change Some applications require that temperature is changed at a specific rate to prevent damage that might otherwise come from rapid changes in device temperature Using the TEC TRATE command it is possible to control the temperature ramp rate of the controller limiting the rate of change to specific degrees Celsius per minute Because the temperature rate function relies on the instrument tracking a gradually changing set point a proper gain setting or PID values is important to achieve a smooth and continuous temperature transition To disable the temperature rate function simply set the rate to O with a TEC TRATE 0 command External Fan Control The TECPak has a built in user adjustable DC power supply designed to provide up to 350mA to an external fan such as t
34. the ITE set point is ignored and the ITE current is controlled exclusively via the analog input The voltage input range goes from OV to 2 5V and the transfer function is ITEserponr ITEumr V 1 25 Where V is the voltage input in volts and ITEserponr is the resulting current set point in Amps As can be seen from this equation the full range of the analog input corresponds to ITE jyr to ITE ur SO the sensitivity of the input function can be adjusted by raising or lowering the limit Because the Analog Set Point input shares the measurement input with the remote sensor input when using RTD 4 wire measurement mode the Analog Set Point Input is disabled Analog Monitor Output The second analog signal is a monitor output that produces a voltage output that tracks the actual voltage across the sensor Because the bias current is fixed the actual sensor resistance can be easily calculated using Ohm s Law and then using the Steinhart Hart formulas the actual temperature can then be calculated TECPak User s Manual Page 31 First to calculate the actual sensor resistance you need to take the voltage output and multiply it by two This is because the output voltage goes through a divide by two circuit before being output and you need to double it to return it to the actual voltage Then the resistance of the sensor is calculated as follows Rgenson Analog Mon Out 2 BiasCurrent The bias current is either 10U
35. tory gain setting Turning the output off remotely will cancel the AutoTune process and generate an E 436 error Compensating for Cable Resistance Because the high currents the TECPak can drive through the Peltier the voltage loss through the cable and connectors of the system can significantly affect the TEC voltage measurement In most cases accurate voltage measurements are not needed and the default compensation of the instrument is sufficient To improve the compensation the Cable R setting allows you to specify the cable resistance which is then used to dynamically subtract the voltage drop by using the formula V IR to calculate the voltage loss where is the TEC ITE current and R is the Cable R setting This value is then removed from the voltage measurement to display an accurate TEC voltage measurement The safest method of calculating cable resistance is to short the ITE and ITE connections making sure whatever you are using to short the terminals is not itself adding resistance to the circuit Use short heavy gauge wires preferably soldered onto the terminals to minimize any resistance the short might add Place the short as close to the Peltier as is reasonable A simple approach is to unplug the cable from the mount and place a shorting plug on the mount end of the cable which is easily made from a male DB15 connector and solding the ITE and ITE pins together Make sure the Peltier is disconnected to protect it from
36. ts A complete list of distributors is available on the Arroyo web site You can contact Arroyo Instruments through one of these methods By mail Arroyo Instruments 624 Clarion Court San Luis Obispo CA 93401 USA By phone 1 805 543 1302 By fax 1 805 543 1303 By email support arroyoinstruments com On the web http www arroyoinstruments com In all cases Arroyo Instruments requires a return materials authorization RMA number You must contact Arroyo Instruments and obtain an RMA number prior to returning your instrument or the shipment may be rejected and sent back to you Pl 2rr0y0 Instruments Page 38 TECPak User s Manual NOTES TECPak User s Manual Page 39 NOTES Bi at f0y0 INSTrUMENTS Bal arroyo Instruments 624 Clarion Court San Luis Obispo CA 93401 Tel 805 543 1302 Fax 805 543 1303 sales arroyoinstruments com www arroyoinstruments com Copyright 2013 Arroyo Instruments All Rights Reserved P N 530 1017 Rev E
37. ur RS 232 or USB interface For USB users the instrument may also ask for drivers which are also found on the CD Launch Arroyo Control and in the TECSource panel if one is not visible click Add Panel in the lower right of the window and click Add a TEC Panel select the communications port to which your TECPak is connected For USB users this will usually be the highest numbered port in the list Click Connect and Arroyo Control will begin controlling the TECPak Once connected you will be able to adjust settings limits and turn the output on or off Next connect the cable between your LaserMount or other fixture and the Output connector of the TECPak We recommend using our cables as they have been designed to work well with the TECPak If using your own cables ensure they have been properly wired according to the pin out of the TECPak and your fixture Finally set the set point to an appropriate temperature and turn the output on You will see the voltage and current begin driving the fixture to the set point you have chosen Depending on the thermal size of your fixture it may take seconds or several minutes to reach the set point If you notice the temperature is oscillating around the set point and not stabilizing you may need to adjust the Gain setting in the Settings dialog TECPak User s Manual Page 7 You can use the AutoTune feature to automatically calculate the best PID values or select from a set of eight
38. ur when the cooling current actually causes additional heating If your application requires you can also configure the TECPak to operate in a cool only mode This is only possible with Peltier coolers To change the cooling mode change Heat Cool Mode setting in the Settings dialog in Arroyo Control or use the TEC HEATCOOL command Gain Control and the PID Loop The TECPak supports a fully configurable PID loop allowing full customization of the PID control parameters To simplify control eight standard gain settings are also defined and many applications can achieve acceptable performance With these predefined gain settings eliminating the need to understand and adjust the PID loop The predefined gains are numbered 7 through 300 and set using the Gain setting in the Settings dialog in Arroyo Control or by using the TEC GAIN command Increasing the gain value will increase the speed of the control loop For full access to the PID parameters change the gain setting to PID and the individual P I and D values can be set with the TEC PID command The PID parameters function within a mathematical formula as described below PID Formula Output P Ee 1 D dt sD Where is the error in the system expressed as amp Target Actual The controller can calculate ideal PID values using the AutoTune function discussed in detail in the next section To manually adjust the PID start by changing the and D values to zer
Download Pdf Manuals
Related Search