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1.8 Optimization of temperature control

Temperature module TED8xxx / page 23

1.8 Optimization of temperature control

1.8.1 Principle set-up and function

When diode laser systems are tempered mainly the following components are

involved:

•

The laser diode to be tempered

•

A temperature sensor (thermistor / AD590 / LM335)

•

A heat source or heat sink (air or water / cooling element)

•

A heat conductor connecting the laser diode to the source/sink (copper, aluminum)

•

A "propulsion" to lead the flow of temperature (TEC element)

laser

sensor

copper bloc

TEC element

heat

sink

Figure 11

Principle set-up of laser temperature control

Influences on the real temperature control loop

Offset and gain errors of the sensor allow only an estimate of the laser

temperature.

The sensor is never fixed directly to the laser chip to measure its “real”

temperature. The inhomogeneous temperature in the copper bloc will influence

the measurement. Even within the laser chip you will find a temperature

gradient.

Possible optimization: calibration of sensor

Содержание TED8020

Страница 1: ... underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In stock Ready to ship TAR certified secure asset solutions Expert team I Trust guarantee I 100 satisfaction All trademarks brand names and brands appearing herein are the property of their respective ...

Страница 2: ...Operation Manual Thorlabs Blueline Series PRO8000 4 PRO800 Temperature module TED8xxx 2003 ...

Страница 4: ...components 15 1 7 1 Pin assignment TED8xxx 15 1 7 2 Pin assignment TED8xxx PT 16 1 7 3 Pin assignment TED8xxx Kryo 17 1 7 4 Connecting a thermistor 18 1 7 5 Connecting an AD590 18 1 7 6 Connecting an LM335 19 1 7 7 Connecting a PT 100 or PT 1000 sensor option PT or Kryo 19 1 7 8 Connecting TEC elements with voltage detector 20 1 7 9 Polarity check of the TEC element 22 1 7 10 Connecting the status...

Страница 5: ...thod 48 3 2 4 Switching the I share on and off INTEG 49 3 2 5 Reading the TEC current ITE 49 3 2 6 Programming the TEC current software limit LIMT 50 3 2 7 Reading the TEC current hardware limit LIMTP 51 3 2 8 Programming the resistance of the temperature sensor RESI 52 3 2 9 Programming the resistance window RWIN 53 3 2 10 Selecting the sensor SENS 54 3 2 11 Programming the PID shares SHAREP I D ...

Страница 6: ... 3 4 9 Device error event register DEE 66 3 4 10 Device error event enable register EDE 67 4 Service and Maintenance 68 4 1 General remarks 68 4 2 Troubleshooting 69 5 Listings 71 5 1 List of abbreviations 71 5 2 List of figures 73 5 3 Certifications and compliances 74 5 4 Addresses 75 ...

Страница 7: ...he name of the manufacturer before it was acquired by Thorlabs and renamed to Thorlabs GmbH Thorlabs GmbH This part of the instruction manual contains every specific information on how to operate a temperature module TED8xxx A general description is followed by explanations of how to operate the unit manually You will also find every information about remote control via the IEEE 488 computer inter...

Страница 8: ...unding can cause electric shock with damages to your health or even death Modules may only be installed or removed with the mainframe switched off All modules must be fixed with all screws provided for this purpose Modules of the 8000 series must only be operated in the mainframe PRO8000 PRO8000 4 or PRO800 All modules must only be operated with duly shielded connection cables Only with written co...

Страница 9: ...ict attention to the safety recommendations of the appropriate laser safety class This laser safety class is marked on your PRO8000 4 PRO800 plug in module or on your external laser source used Attention Mobile telephones handy phones or other radio transmitters are not to be used within the range of three meters of this unit since the electromagnetic field intensity may then exceed the maximum al...

Страница 10: ...ard and software determined by Thorlabs GmbH for this unit to operate fault free provided that they are handled according to our requirements However Thorlabs GmbH does not warrant a faulty free and uninterrupted operation of the unit of the soft or firmware for special applications nor this instruction manual to be error free Thorlabs GmbH is not liable for consequential damages Restriction of wa...

Страница 11: ...incorrect temperature sensors protection against line interruption of the temperature sensor Contact protection of the TEC element open circuit Protection against cable damage bad contact or TEC element with too high resistance The output remains switched on since a wrong TEC element is still cooling and can protect the laser diode Separate on off function for each module Protection against operat...

Страница 12: ...citly be switched on anew since it cannot be taken for granted that all components of the measurement set up are still working faultlessly Key operated power switch Protection against unauthorized or accidental use LabVIEW and LabWindows CVI driver For the PRO8000 4 PRO800 Thorlabs GmbH supplies LabVIEW and LabWindows CVI drivers for MS Windows 32 Please refer to our homepage for latest driver upd...

Страница 13: ...ting elements keypad and rotational encoder or via remote control by a computer Only the TEC current limit hardware limit has to be set manually as absolute limit In an automated test set up for different laser diodes no manual settings are required The set values for the temperature or the thermistor resistance have 16 bits resolution The limit value for the TEC current software limit is set with...

Страница 14: ...resolution 0 025 C Temperature stability typ 0 002 C Thermistor calibrated and not calibrated display in Ω Measurement current 100 µA 10 µA1 Control range 5 Ω 20 kΩ 50 Ω 200 kΩ1 Resolution 0 3 Ω 3 Ω 1 Setting accuracy 2 5 Ω 25 Ω 1 Resistance stability typ 0 5 Ω 5 Ω1 Thermistor calibrated display in C Measurement current 100 µA 10 µA1 Control range temperature at 20 kΩ 200 kΩ 150 C2 Resolution 2 Se...

Страница 15: ...ution 0 0015 C Accuracy 0 3 C Temperature stability typ 0 005 C Temperatures Operating temperature 0 40 C Storage temperature 40 70 C Connector 15 pin D Sub f 1 4 2 Technical data TED8xxx Kryo option PT 1000 Sensor Measurement current 1 mA 400 µA1 Control range 20 K 310 K1 Resolution 20 155 K 2 mK 1 Accuracy 2 K 1 0 5 K 2 Temperature stability typ 20 155 K 0 005 K 1 depending on selected range low...

Страница 16: ...oise and ripple 1 mA Current limit Setting range 0 2 A Accuracy 20 mA Resolution D A Converter 0 5 mA Width 1 slot Weight 500 g 1 4 4 TED8040 Current output TEC element Control range 4 A 4 A Maximum output power 32 W Compliance voltage 8 V Measurement resolution ITE 0 15 mA Measurement accuracy ITE 10 mA Measurement resolution UTE 0 3 mV Measurement accuracy UTE 20 mV Noise and ripple 2 mA Current...

Страница 17: ...A 8 A Maximum output power 64 W Compliance voltage 8 V Measurement resolution ITE 0 3 mA Measurement accuracy ITE 25mA Measurement resolution UTE 0 3 mV Measurement accuracy UTE 20 mV Noise and ripple 4 mA Current limit Setting range 0 8 A Accuracy 80 mA Setting accuracy software 2 mA Width 2 slots Weight 700 g ...

Страница 18: ... elements on front panel 1 5 1 The TED8xxx module Connector jack for the TEC element Potentiometer for ILIM Figure 1 The front panel of the TED8xxx module NOTE This picture is valid for all temperature modules with one slot width The module TED8080 with 8 A TEC current is of double width ...

Страница 19: ...nts on front panel Temperature module TED8xxx page 12 1 5 2 The TED8080 module ON LIM I ERR SEL ON ERR TE CONTROLLER Figure 2 The front panel of the TED8080 module Potentiometer for ILIM Connector jack for the TEC element ...

Страница 20: ...sible hardware limit and software limit Hardware limit ILIM The hardware limit ILIM is set with the potentiometer ILIM at the front of the module TED8xxx See section 1 5 Operating elements on front panel on page 11 The value is displayed continually in the channel menu of the module so you can watch it during adjustment CH2 Dsh 25 0 TE off ILIM 1 842 A Iconst Imax 0 800 A CHANGE Hardware limit ILI...

Страница 21: ...488 interface CH2 Dsh 25 0 TE off ILIM 1 842 A Iconst Imax 0 800 A CHANGE Software limit IMAX The software limit IMAX effects the current regulation of the module via D A converters and yields exactly the same protective function as the hardware limit Refer to chapter 2 2 2 Changing parameters starting on page 31 NOTE The lower value of the two limits IMAX and ILIM will limit the TEC current ...

Страница 22: ...re 3 TED8xxx pin assignment Pin Connector TEC element 5 6 7 TEC element 13 14 15 TEC element ground 2 Voltage detector TEC element 9 Voltage detector TEC element Status display 1 Status LED anode 8 Status LED cathode ground Temperature sensor 3 Thermistor ground 4 Thermistor 10 AD590 11 AD590 12 leave open 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ...

Страница 23: ... TEC element 5 6 7 TEC element 13 14 15 TEC element ground 2 Voltage detector TEC element 9 Voltage detector TEC element Status display 1 Status LED anode 8 Status LED cathode ground Temperature sensor 3 PT 100 current source ground 4 PT 100 current source 10 Voltage measurement input 11 Voltage measurement input 12 leave open 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ...

Страница 24: ...lement 5 6 7 Heater element 13 14 15 Heater element ground 2 Voltage detector heater element 9 Voltage detector heater element Status display 1 Status LED anode 8 Status LED cathode ground Temperature sensor 3 PT 1000 current source ground 4 PT 1000 current source 10 Voltage measurement input 11 Voltage measurement input 12 leave open 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ...

Страница 25: ...for TEC current and temperature sensor The shield has to be connected to ground pin 13 14 15 1 7 4 Connecting a thermistor The thermistor is connected between pin 3 and pin 4 Figure 6 Connecting a thermistor 1 7 5 Connecting an AD590 The IC temperature sensor AD590 is connected between pin 10 and pin 11 Figure 7 Connecting an AD590 AD 590 10 11 ...

Страница 26: ...ensor option PT or Kryo Figure 9 Connecting a PT 100 or PT 1000 sensor option PT or Kryo Pin 3 and 4 of the D Sub Connector are the current source Pin 10 and 11 are the voltage measurement input pins for the 4 wire measurement setup One connector of the sensor has to be connected to pin 4 and 11 while the other connector goes to pin 3 and 10 Pin 3 is connected to common ground via a 10 Ω resistor ...

Страница 27: ...e temperature control works at normal conditions Pin 3 and or Pin 4 are not connected The resistance measurement is done as 2 wire measurement the resistances of cable and connectors are included in the measurement The temperature control works at normal conditions 1 7 8 Connecting TEC elements with voltage detector The TEC element is connected between pins 5 6 7 plus pole and pins 13 14 15 minus ...

Страница 28: ...TED8xxx page 21 Figure 10 4 pole measurement of TEC voltage Attention An reverse poled TEC element may lead to thermal runaway and destruction of the connected components Refer to section 1 7 9 Polarity check of the TEC element starting on page 22 ...

Страница 29: ...uns away from TSET or RSET the TEC element is reverse poled Change polarity and repeat the procedure If TACT or RACT is oscillating around the value TSET or RSET the TEC element is connected correctly but the P I and D share values of the control loop are still incorrect Refer to chapter 1 8 2 PID adjustment starting on page 24 If TACT or RACT is settling properly to the value TSET or RSET the TEC...

Страница 30: ...ode to the source sink copper aluminum A propulsion to lead the flow of temperature TEC element laser sensor copper bloc TEC element heat sink Figure 11 Principle set up of laser temperature control Influences on the real temperature control loop 1 Offset and gain errors of the sensor allow only an estimate of the laser temperature The sensor is never fixed directly to the laser chip to measure it...

Страница 31: ...rthermore the temperature slope in the copper must stabilize anew The sensor must settle to the laser temperature it also has a non negligible heat capacity Possible optimization careful adjustment of PID parameters 1 8 2 PID adjustment Temperature control loops are comparatively slow with control oscillations in the Hertz range The PID adjustment will optimize the dynamic behavior With the TED8xx...

Страница 32: ...Change repeatedly between set temperatures of 18 C and 22 C while observing again the settling behavior of the actual temperature Increase the D share gradually Higher values will decrease the amplitude of the overshoots The D share is set correctly when the actual temperature remains stable near the set temperature after a minimum of overshoots I share Turn on the I share again Again change repea...

Страница 33: ...y The main menu shows the channel number the main operating parameter and the type of sensor of the TED8xxx module channel no Cursor main parameter type of sensor CH1 T 20 000 C AD CH2 TUNE With the module switched OFF the main parameter is the set temperature With the module switched ON LED ON lights up on the front of the module the main parameter is the actual temperature NOTE Even with a therm...

Страница 34: ...e channel number of the desired module with the softkeys or CH4 Pressing will lead to the channel menu Refer to chapter 2 2 Functions in the channel menu starting on page 29 2 1 3 Setting the temperature To change the set temperature in the main menu the corresponding module is selected with the cursor here CH2 CH1 T 18 000 C AD CH2 T 20 000 C AD TUNE ...

Страница 35: ...sor to the right CH1 T 18 000 C AD CH2 T 20 000 C AD TUNE TS The temperature can be adjusted by means of the tuning knob Press to make the new settings valid NOTE If the TEC current is switched ON the actual temperature is displayed In this case the set temperature can still be changed but is not displayed ...

Страница 36: ...annel no cursor operating parameters CH3 TS 22 000 C TE on TA 22 000 C Th lo Twin 5 60 C CHANGE TEC on off type of sensor Only three parameters can be shown at a time so there is a scroll function All parameters are sorted in a virtual list which can be run through with the cursor TS 22 000 C TA 22 000 C Twin 5 60 C Ite 0 799 A Ute 1 950 V Psh 20 0 Ish 20 0 Ishare off Dsh 20 0 ILIM 1 999 A Imax 0 ...

Страница 37: ...0 50 Ω RA 9 1234 kΩ Rwin 6 1234kΩ R0 10 000 kΩ B 3900 0 T0 25 000 C C1 1 1234E 3 C2 2 1234E 4 C3 3 1234E 6 The field type of sensor shows AD590 If the sensor is an AD590 or LM 335 or equ Th lo If the sensor is a thermistor 20 kΩ max Th hi If the sensor is a thermistor 200 kΩ max PT100 If the sensor is a PT100 PT100 option Kry hi If the sensor is a PT 1000 200 500 Ω Kryo module Kry lo If the sensor...

Страница 38: ...essing the key CHANGE you can change the selected parameter with the tuning knob If the selected parameter is a switch parameter i e the type of the sensor the function of the softkeys will change TOGGLE SENSOR AD TH Pressing the right softkey will toggle the sensor type Pressing will terminate the procedure NOTE Some parameters can not be changed as they are measurement values i e the TEC voltage...

Страница 39: ...u choose between Thermistor Thermistor The corresponding range has to be selected PT100 Pt 100 No further selection As for the TED8xxx Kryo you can not choose between different sensors The Pt 1000 sensor is predefined You can only choose between two temperature resistance ranges see section 2 2 5 Selecting the range of the Pt 1000 Kryo option on page 33 Select the desired type and press The channe...

Страница 40: ...20 kΩ or 200 kΩ Th range low 20 kΩ range Th range high 200 kΩ range Select the desired range and press 2 2 5 Selecting the range of the Pt 1000 Kryo option In menu line range the temperature range can be selected The setting low range operates from 76 K to about 148 K the high range from 143 K to about 325 K The display changes between Low range and High range ...

Страница 41: ... is known all inputs and outputs can be calibrated in C Two methods to calculate the resistance from temperature are implemented The exponential method The Steinhart Hart method In the channel menu you can choose between those two methods and enter the corresponding parameters Select the line Steinh Hart resp Exponential The right softkey toggles between the two methods Select the desired type and...

Страница 42: ...B R R T T B R T e R T R val ln 0 0 0 1 1 0 0 temperatures in Kelvin with R0 Thermistor nominal resistance at temperature T0 T0 Nominal temperature typ 298 15 K 25 C Bval Energy constant Refer to the data sheet of the thermistor To change the three parameters select them one by one and change them to the desired value Pressing will make every setting valid Refer to chapter 2 2 2 Changing parameters...

Страница 43: ...way of representing the relation between temperature and thermistor resistance is the method according to Steinhart Hart 3 ln 3 ln 2 1 1 R C R C C T with the three parameters C1 C2 and C3 To change the three parameters select them one by one and set them to the desired value Pressing will terminate each input ...

Страница 44: ...00K there are small differences between the DIN IEC 751 model and the real sensor resistance temperature The following graphics shows the corrections which have to be applied by the customer to the displayed temperature values to obtain physically correct temperatures Temperature difference 1 5 1 0 5 0 0 5 1 1 5 0 100 200 300 Temperature in Kelvin Deviation K Figure 12 PT1000 temperature correctio...

Страница 45: ...ease remind that if you use the TED8xxx module in conjunction with a LDC8xxx laser diode controller the LDC may be switched off automatically if you change the temperature window because the laser temperature may be outside the new window 2 2 9 Setting the P I and D share of the control loop The temperature control behavior of the TED8xxx can be adapted optimally to the individual laser set up by ...

Страница 46: ...le TED8xxx page 39 For adjustment of the parameters it is sometimes necessary to switch off the I share completely There is a separate switch parameter for this purpose Ishare ON OFF You can toggle the function with the right softkey Press to end input ...

Страница 47: ...D8xxx first set the TEC limit current ILIM hardware limit for the applied TEC element with a screwdriver The corresponding potentiometer is marked ILIM and is situated at the front panel of the current module Refer to chapter 1 6 1 Setting the limit values starting on page 13 Pressing the key will switch the module on or off not regarding the menu you are in as long as the module is selected The L...

Страница 48: ...accept Possible error messages for a TED8xxx module are Sens fail Wiring to the sensor has opened during operation No Sensor No or wrong sensor connected when trying to switch on OPEN Wiring to the Peltiér has opened during operation OTP Module is too hot Operation is possible again after cooling down TEMP PROT Temperature has left the window e g the laser has been switched off NOT IF TEC ON Some ...

Страница 49: ...occurs during operation it is written in brackets CH3 Sens fail If the error occurs when switching on the module it is written in cursor arrows CH3 No Sensor If an error occurs it has to be acknowledged by pressing OK Until acknowledge ment further operation is locked ...

Страница 50: ...ng the TED8xxx starting on page 26 NOTE All analog values are read and written in SI units i e A not mA W not mW etc Letters may be written in small or capital letters Attention Before programming a temperature module first set the limit value of the TEC current ILIM hardware limit for the used TEC element with a screwdriver The corresponding potentiometer is marked ILIM and is situated at the fro...

Страница 51: ...eparated by comma PLOT 2 0 Commands are separated by semicolon IDN STB 3 1 2 Data format According to the IEEE 488 2 specifications all data variables are divided into 4 different data formats Character response data CRD Is a single character or a string Examples A or ABGRS or A125TG or A1 23456A Refer to IEE488 2 8 7 1 Numeric response data Type 1 NR1 Is a numerical value with sign in integer not...

Страница 52: ... without sign in floating point notation without exponent Examples 1 1 or 1 1 or 22 1 or 14356 789432 Refer to IEE488 2 8 7 3 Numeric response data Type 3 NR3 Is a numerical value with or without sign in floating point notation with exponent with sign Examples 1 1E 1 or 1 1E 1 or 22 1E 1 or 143 56789432E 306 Refer to IEE488 2 8 7 4 ...

Страница 53: ...B SET NR3 Program the energy constant Bval CALTR SET NR3 Program the nominal resistance R0 CALTT SET NR3 Program the nominal temperature T0 Reading CALTB SET Reading the energy constant Bval CALTB SET NR3 LF CALTR SET Reading the nominal resistance R0 CALTR SET NR3 LF CALTT SET Reading the nominal temperature T0 CALTT SET NR3 LF CALTB MIN Reading the minimum Bval allowed CALTB MIN NR3 LF CALTR MIN...

Страница 54: ...tion 2 2 6 Calibrating the thermistor on page 34 NOTE The selection on how the sensor calibration is done exponential method or Steinhart Hart method is done by the order in which you transmit the coefficients If the last transmitted calibration command belongs to the exponential method see above then the calculation is also done with the exponential method If the last command was a Steinhart Hart...

Страница 55: ...ead the Steinhart Hart coefficient C2 CALTC2 SET NR3 LF CALTC3 SET Read the Steinhart Hart coefficient C3 CALTC3 SET NR3 LF CALTC1 MIN Read the minimum C1 allowed CALTC1 MIN NR3 LF CALTC2 MIN Read the minimum C2 allowed CALTC2 MIN NR3 LF CALTC3 MIN Read the minimum C3 allowed CALTC3 MIN NR3 LF CALTC1 MAX Read the maximum C1 allowed CALTC1 MAX NR3 LF CALTC2 MAX Read the maximum C2 allowed CALTC2 MA...

Страница 56: ...amming ITE MEAS NR1 Program ITE to be measurement value for ELCH1 on position NR1 1 8 in the output string Reading ITE ACT Read the actual TEC or heater current ITE ACT NR3 LF ITE MIN_R Read the minimum TEC current for Ite ADC 0000 ITE MIN_R NR3 LF ITE MAX_R Read the maximum TEC current for Ite ADC FFFF ITE MAX_R NR3 LF ITE MEAS Read the position of the TEC current as measurement value in the ELCH...

Страница 57: ...oftware current limit Reading LIMT SET Read the TEC current software limit LIMT SET NR3 LF LIMT MIN Read the minimum TEC software current limit allowed LIMT MIN NR3 LF LIMT MAX Read the maximum TEC software current limit allowed LIMT MAX NR3 LF LIMT MIN_W Read ITE LIM ADC 0000 LIMT MIN_W NR3 LF LIMT MAX_W Read ITE LIM ADC FFFF LIMT MAX_W NR3 LF ...

Страница 58: ...C current hardware limit LIMTP Reading LIMTP ACT Read the actual TEC hardware current limit LIMTP ACT NR3 LF LIMT MIN_W Read ITE max DAC 0000 LIMT MIN_W NR3 LF LIMT MAX_W Read ITE max DAC FFFF LIMT MAX_W NR3 LF Refer to Chapter 1 6 1 Setting the limit values on page 13 ...

Страница 59: ...f the sensor thermistor RESI SET NR3 LF RESI ACT Read the actual resistance of the sensor RESI ACT NR3 LF RESI MIN Read the minimum set resistance of the sensor allowed RESI MIN NR3 LF RESI MAX Read the maximum set resistance of the sensor allowed RESI MAX NR3 LF RESI MIN_W Read R DAC 0000 RESI MIN_W NR3 LF RESI MAX_W Read R DAC FFFF RESI MAX_W NR3 LF RESI MIN_R Read R ADC 0000 RESI MIN_R NR3 LF R...

Страница 60: ... the resistance window Reading RWIN SET Read the set resistance window RWIN SET NR3 LF RWIN MIN Read the minimum set resistance window allowed RWIN MIN NR3 LF RWIN MAX Read the maximum set resistance window allowed RWIN MAX NR3 LF RWIN MIN_W Read Rwin DAC 0000 RWIN MIN_W NR3 LF RWIN MAX_W Read Rwin DAC FFFF RWIN MAX_W NR3 LF ...

Страница 61: ...mistor 20 kΩ range SENS THH Sensor is thermistor 200 kΩ range SENS PT100 Sensor is PT 100 only TED8xxx PT SENS PT1000L Sensor is PT 1000 only TED8xxx Kryo low region SENS PT1000H Sensor is PT 1000 only TED8xxx Kryo high region Reading SENS Read the actual sensor type SENS AD LF SENS THL LF SENS THH LF SENS PT100 LF SENS PT1000L LF SENS PT1000H LF ...

Страница 62: ...SHAREI SET NR3 LF SHARED SET Read the D share SHARED SET NR3 LF SHAREP MIN Read the minimum P share allowed SHAREP MIN NR3 LF SHAREI MIN Read the minimum I share allowed SHAREI MIN NR3 LF SHARED MIN Read the minimum D share allowed SHARED MIN NR3 LF SHAREP MAX Read the maximum P share allowed SHAREP MAX NR3 LF SHAREI MAX Read the maximum I share allowed SHAREI MAX NR3 LF SHARED MAX Read the maximu...

Страница 63: ...mperature module TED8xxx page 56 3 2 12 Switching the TEC on and off OUTP Programming TEC ON Switching the TEC output on TEC OFF Switching the TEC output off Reading TEC Read status of the output TEC ON LF TEC OFF LF ...

Страница 64: ...EMP SET NR3 LF TEMP ACT Read the actual temperature TEMP ACT NR3 LF TEMP MIN Read the minimum set temperature allowed TEMP MIN NR3 LF TEMP MAX Read the maximum set temperature allowed TEMP MAX NR3 LF TEMP MIN_W Read T DAC 0000 TEMP MIN_W NR3 LF TEMP MAX_W Read T DAC FFFF TEMP MAX_W NR3 LF TEMP MIN_R Read T ADC 0000 TEMP MIN_R NR3 LF TEMP MAX_R Read T ADC FFFF TEMP MAX_R NR3 LF TEMP MEAS Read strin...

Страница 65: ...the temperature window Reading TWIN SET Read the set temperature window TWIN SET NR3 LF TWIN MIN Read the minimum set temperature window allowed TWIN MIN NR3 LF TWIN MAX Read the maximum set temperature window allowed TWIN MAX NR3 LF TWIN MIN_W Read Twin DAC 0000 TWIN MIN_W NR3 LF TWIN MAX_W Read Twin DAC FFFF TWIN MAX_W NR3 LF ...

Страница 66: ... Kryo option 2 TYPE SUB NR1 LF 3 2 15 Reading the TEC voltage VTE Programming VTE MEAS NR1 Select TEC or heater voltage to be measurement value for ELCH on string po sition NR1 1 8 Reading VTE ACT Read the actual TEC voltage VTE ACT NR3 LF VTE MIN_R Read UTE ADC 0000 VTE MIN_R NR3 LF VTE MAX_R Read UTE ADC FFFF VTE MAX_R NR3 LF VTE MEAS Read string position 1 8 of peltier voltage as measurement va...

Страница 67: ...sor selected 1105 No calibrating of sensor during TEC on Possible reason The sensor can not be calibrated during the TEC output is switched on 1106 Wrong command for this sensor Possible reason A used command is not allowed for the selected sensor Example RWIN with an AD590 1107 No sensor change during TEC on allowed Possible reason The sensor type may not be changed if the TEC output is switched ...

Страница 68: ...16 bit registers DEC DEE and EDE see Figure 13 together with four 8 bit registers ESR STB ESE and SRE see Figure 14 of the mainframe to program various service request functions and status reporting Please refer to the IEEE488 2 1992 standard chapter 11 Figure 13 The TED8xxx device error registers DEC DEE and EDE ...

Страница 69: ...3 4 Status reporting Temperature module TED8xxx page 62 Figure 14 The PRO8000 4 PRO800 register ESR ESE STB and SRE Output buffer ERROR Queue or serial poll Service Request Generation ...

Страница 70: ...ror A query error occurred Request control Not used Operation complete Can be set with OPC The ESR can be read directly with the command ESR This read command clears the ESR The content of the ESR can not be set The bits are active high 3 4 2 Standard event status enable register ESE The bits of the ESE are used to select which bits of the ESR shall influence bit 5 ESB of the STB The 8 bits of the...

Страница 71: ...his bit is high as long as there are errors in the error queue FIN command FINished This bit is high after a command has finished and all bits of the STB have been set The STB can be read directly with the command STB The content of the STB can not be set The bits are active high All bits except bit 6 of the STB can be used to assert a service request SRQ Please refer to 3 4 5 Alternatively the SR...

Страница 72: ...ial polling 3 4 6 Reading the STB by STB command If the controller does not listen to SRQ s at all the service request can be detected by reading the status byte with the command STB If bit 6 is logical 1 a service request was asserted 3 4 7 Reading the STB by serial poll If the controller does not support auto serial poll the service request can also be detected via manual serial poll If bit 6 is...

Страница 73: ...until the module has cooled down Maintain proper air flow 4 Temperature out of window TEC temperature is out of specified window 5 Open circuit TEC circuit is open 6 No or wrong sensor Temperature sensor not connected or wrong type 8 Power supply error Internal powersupply error The DEC can be read but not set Reading does not clear the DEC 3 4 9 Device error event register DEE The bits of this re...

Страница 74: ...which bits of the DEE shall influence bit 3 DES of the STB The 8 bits of the EDE are related by logical AND to the according 8 bits of the DEE This 8 results are connected by logical OR so that any hit leads to a logical 1 in bit 3 DES of the STB As any bit of the STB can assert an SRQ every error bit of the DEE can be used to assert an SRQ ...

Страница 75: ...D8xxx page 68 4 Service and Maintenance 4 1 General remarks The TED8xxx modules do not need any maintenance by the user If highest precision of measurements is vital to you you should have recalibrated the TED8xxx module about every two years ...

Страница 76: ...he PRO8000 4 PRO800 mainframe If blown up replace the fuse by the correct type refer to your PRO8000 4 PRO800 mainframe operating manual to select the appropriate fuse The PRO8000 4 PRO800 display works but not the module Is the module inserted correctly and are all mounting screws tightened Insert the module in the desired slot and tighten all mounting screws properly Do you have selected the des...

Страница 77: ... correctly Check the corresponding connections and polarities of the temperature sensor refer to chapters 1 7 4 to 1 7 7 Check the software settings in the channel menu Select the corresponding temperature sensor Enter the right set values for resistance RS R0 and Temperature T0 Set temperature differs from actual temperature of the laser Is the sensor calibrated properly Enter the right calibrati...

Страница 78: ... Error Event Register DES Device Error Status EAV Error AVailable EDE Enable Device Error Event Register ELCH ELectrical Characterization EOI End Of Information ESE Standard Event Status Enable register ESR Event Status Register FIN Command FINished GET Group Execute Trigger GTL Go To Local GPIB General Purpose Interface Bus IEEE Institute for Electrical and Electronic Engineering I Share Integral...

Страница 79: ...Share Proportional share PT100PlaTinum sensor 100 Ω nominal resistance PT1000 PlaTinum sensor 1000 Ω nominal resistance RQS ReQuest Service Message SDC Selected Device Clear SEL SELect SRE Service Request Enable Register SRQ Service ReQuest STB STatus Byte Register SW Soft Ware TEC ThermoElectric Cooler Peltier Element TRG TRiGger ...

Страница 80: ...ignment 17 Figure 6 Connecting a thermistor 18 Figure 7 Connecting an AD590 18 Figure 8 Connecting an LM335 19 Figure 9 Connecting a PT 100 or PT 1000 sensor option PT or Kryo 19 Figure 10 4 pole measurement of TEC voltage 21 Figure 11 Principle set up of laser temperature control 23 Figure 12 PT1000 temperature correction at low temperatures 37 Figure 13 The TED8xxx device error registers DEC DEE...

Страница 81: ...ce criterion C IEC 61000 4 5 Power Line Surge Immunity Performance criterion C IEC 61000 4 6 Conducted RF Immunity Performance criterion B IEC 61000 4 11 Voltage Dips and Interruptions Immunity Performance criterion C EN 61000 3 2 AC Power Line Harmonic Emissions Complies with the Radiocommunications Act and demonstrated per EMC Emission standard1 2 3 AS NZS 2064 Industrial Scientific and Medical ...

Страница 82: ... 5956 0 Fax 49 0 81 31 5956 99 Email profile thorlabs com Internet http www thorlabs com Technical Hotline blueline thorlabs com Our company is also represented by several distributors and sales offices throughout the world Please call our hotline send an E mail to ask for your nearest distributor or just visit our homepage http www thorlabs com ...

Страница 83: ...quipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentation Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate representative or authorized distributor for any manufacturer listed herein We re here to make your life easier How...

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