THORLABS TED8000 Series User manual

PRO800 / PRO8000 (-4) Series
Modular Temperature Controllers
TED8000
Operation Manual
2016

Version:
Date:
Item No.:
3.2
08-Sep-2016
M0009-510-227
Copyright © 2016 Thorlabs

Foreword
Contents 3
1General Information 4
41.1 Safety 51.2 Ordering Codes and Accessories
2Getting Started 6
62.1 Parts List 62.2 Operating Principle 82.3 Operating Elements
3External Connections 9
93.1 TED80x0 103.2 TED80x0-PT 113.3 TED80x0-KRYO 123.4 Connecting a Thermistor 123.5 Connecting an AD590 123.6 Connecting a LM335 123.7 Connecting a Pt-100 or Pt-1000 133.8 Connecting a TEC Element with Voltage Detector 143.9 Polarity Check of the TEC Element 143.10 Connecting the Status Display LED
4Optimization of Temperature Control 15
154.1 Principle Setup and Function 164.2 PID Adjustment
5Operating Instruction 17
175.1 Pre-Settings 185.2 Functions in the Main Menu 205.3 Functions in the Channel Menu 205.3.1 Display 225.3.2 Changing Parameters 225.3.3 Selecting the Type of the Temperature Sensor 235.3.4 Selecting the Thermistor Range 235.3.5 Selecting the Pt-1000 Range (KRYO only) 245.3.6 Thermistor Calibration 255.3.7 Pt-1000 Calibration (KRYO only) 255.3.8 Setting a Temperature Window 265.3.9 Setting the P, I and D Share of the Control Loop 265.4 Switching ON and OFF 275.5 Error Messages
6Communication with a PC 28

286.1 Nomenclature 286.2 Data Format 296.3 Commands and Queries 296.3.1 Select the Module Slot 296.3.2 Thermistor Calibration - Exponential Method 306.3.3 Thermistor Calibration - Steinhart-Hart Method 316.3.4 Switching the I Share On / Off (INTEG) 316.3.5 Reading the TEC Current (ITE) 326.3.6 Programming the TEC Current Software Limit (LIMT) 326.3.7 Reading the TEC Current Hardware Limit (LIMTP) 336.3.8 Programming the Resistance of the Temperature Sensor (RESI) 346.3.9 Programming the Resistance Window (RWIN) 346.3.10 Selecting the Sensor (SENS) 356.3.11 Programming the PID Shares (SHAREP, SHAREI, SHARED) 356.3.12 Switching the TEC On / Off (TEC) 366.3.13 Programming the Temperature (TEMP) 376.3.14 Programming the Temperature Window (TWIN) 376.3.15 Query Type of Module 386.3.16 Reading the TEC Voltage (VTE) 396.4 IEEE Error Messages 396.5 Status Reporting 426.5.1 Standard Event Status Register (ESR) 426.5.2 Standard Event Status Enable Register (ESE) 426.5.3 Status Byte Register (STB) 436.5.4 Service Request Enable Register (SRE) 436.5.5 Reading the STB by Detecting SRQ 436.5.6 Reading the STB by *STB? Command 436.5.7 Reading STB by Serial Poll 436.5.8 Device Error Condition Register (DEC) 446.5.9 Device Error Event Register (DEE) 446.5.10 Device Error Event Enable Register (EDE)
7Maintenance and Service 45
457.1 Troubleshooting
8 Appendix 47
478.1 Technical Data 498.2 Certifications and Compliances 508.3 Literature 518.4 Warranty 528.5 Copyright and Exclusion of Reliability 538.6 Thorlabs 'End of Life' Policy 548.7 List of Acronyms 568.8 Thorlabs Worldwide Contacts

© 2016 Thorlabs
We aim to develop and produce the best solution for your application
in the field of optical measurement technique. To help us to live up to
your expectations and improve our products permanently we need
your ideas and suggestions. Therefore, please let us know about
possible criticism or ideas. We and our international partners are
looking forward to hearing from you.
Thorlabs GmbH
Warning
Sections marked by this symbol explain dangers that might result in
personal injury or death. Always read the associated information
carefully, before performing the indicated procedure.
Please read these advices carefully!
This manual also contains "NOTES" and "HINTS" written in this form.
Attention
Paragraphs preceeded by this symbol explain hazards that could
damage the instrument and the connected equipment or may cause
loss of data.
Note
3

© 2016 Thorlabs4
TED8000
1 General Information
The TED8000 Modules are Temperature Controllers that are capable to control TEC elements
(Peltiers) inorder to maintaina constant temperature of e.g. laser diodes
For the PRO8000 mainframe series Thorlabs supplies LabVIEW®- and LabWindows/CVI®-drivers
for Windows 32 bit.
Please refer to http://www.thorlabs.com for latest driver updates.
1.1 Safety
Attention
All statements regarding safety of operation and technical data in this instruction manual will only
applywhenthe unit is operated correctlyas it was designed for.
Prior to applying power to the TED8000, make sure that the protective conductor of the mains
power cord is correctly connected to the protective earth ground contact of the socket outlet!
Improper grounding cancause electric shock resulting indamage to your healthor evendeath!
Also make sure that your line voltage agrees withthe voltage givenonthe letterplate of the unit and
that the right fuse has beeninserted!
Modules of the TED8000 Series are allowed to be operated only a mainframe of the PRO8000
series.
To avoid damage to the modules used or to the mainframe, modules must not be installed or
removed whenthe mainframe is switched on.
Allmodules mustbe fixed using the screws provided for this purpose.
The TED8000 must not be operated inexplosionendangered environments!
Do not remove covers! Do not obstruct the air ventilationslots inthe housing!
Refer servicing to qualified personnel!
Only with written consent from Thorlabs may changes to single components be made or
components not supplied byThorlabs be used.
This precision device is onlyserviceable if properlypacked into the complete original packaging. If
necessary, ask for a replacementpackage prior to return.
Allconnections to the load must be made using shielded cables,unless otherwise stated.
Semiconductor lasers can deliver up to several 100mW of possibly invisible laser radiation!
Improper operation cancause severe eye and healthdamage!
Paystrict attentionto the safetyrecommendations of the appropriate laser safetyclass!
Attention
The following statement applies to the products covered in this manual, unless otherwise specified
herein. The statement for other products will appear inthe accompanying documentation.
This equipment has been tested and found to comply with the limits for a Class Adigital device,
pursuantto part15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful
interference inwhichcase the user will be required to correct the interference at his ownexpense.
Thorlabs is not responsible for any radio television interference caused by modifications of this
equipment or the substitution or attachment of connecting cables and equipment other than those

© 2016 Thorlabs
1 General Information
5
specified by Thorlabs. The correction of interference caused by such unauthorized modification,
substitution or attachment will be the responsibilityof the user.
The use of shielded I/O cables is required when connecting this equipment to any and all optional
peripheralor host devices. Failure to do so mayviolate FCC and ICES rules.
Attention
Mobile telephones, cellular phones or other radio transmitters are not to be used withinthe range of
three meters of this unit since the electromagnetic field intensity may then exceed the maximum
allowed disturbance values according to IEC 61326-1.
This product has been tested and found to comply with the limits according to IEC 61326-1 for
using connectioncables shorter than3 meters (9.8 feet).
1.2 Ordering Codes and Accessories
Please refer to the actual catalog or the web for an actual list of available plug in modules and
accessories and for the complete ordering codes.
Ordering Code Short Description
Temperature Control Modules withstandard temperature sensors (NTC 10 kW, NTC 100 kW;
AD590, AD592, LM335):
TED8020 Temperature Controller Module ± 2 A,
TED8040 Temperature Controller Module ± 4 A
TED8080 Temperature Controller Module ± 8 A
TED80xx-PT Temperature Control Modules withPt-100 RTD temperature sensors. Same
currentranges as standard controllers
TED80xx-KRYO Temperature Control Modules withPt-1000 RTD temperature sensors for
cryogenic applications. Heating only!Same current ranges as standard
controllers.
CAB420-15 Temperature Controller ConnectionCable for TED8000 modules, 1.5 m, to
connect Thorlabs Laser Diode Mounts

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TED8000
2 Getting Started
2.1 Parts List
Inspect the shipping container for damage.
If the shipping container seems to be damaged, keep it until you have inspected the contents and
youhave inspected the TED8000 mechanicallyand electrically.
Verifythat youhave received the following items within the package:
1. TED8000 Series Module
2. Operating Manual
2.2 Operating Principle
The TED8000 temperature modules are bidirectional current sources to control a TEC element
(Peltier). Different types of temperature sensors are supported. Three types of modules are
available withrespect to the maximum current, resolution and accuracy(see Technical Data )
The TED8000 modules containa closed loop amplifier withadjustable settings for P (proportional),
I(integral) and D (differential) share.
Supported temperature sensors
·Standard thermistors (NTC - Negative Temperature CoefficientThermistor) withintwo ranges
- max. 20 kWand max. 200 kW
·IC temperature sensors (AD590, AD592, LM335)
·Pt-100 and Pt-1000 (RTD - Resistance Temperature Detectors)
Allnecessaryvalue settings are made bythe mainframe operating elements (keypad and rotational
encoder) or via remote control bya computer.The onlyparameter that must be set manually, is the
TEC current limit ("absolute hardware limit").
The values for set temperature or set resistance of the TED8000 modules are set with 16 bit
resolution.
Limit values for the TEC current (software limit) are set witha 12 bit resolution.
The actualtemperature (resistance) is read back with16 bit; the TEC current, TEC voltage and the
limit for the TEC current (hardware limit) with15 bit plus sign.
The P, Iand D shares of the analog control loop are set by three independent 12 bit DAC (Digital-
to-Analog Converters)
The built-in mains filter in the mainframe and the careful shielding of the transformer, the micro
processor as wellas the module itself willprovide anexcellentsuppressionof noise and ripple.
TEC Element Protection Features
To protect the connected TEC element, the TED8000 modules contain the following protection
circuits:
·Hardware and Software Limits of the TEC current in all operating modes
Protection from thermal destruction.
·Sensor Protection
Protectionfrom the use of not supported temperature sensors and from interrupted sensor
connection.
·Open-Circuit Protection of the connection cable to the TEC element
Protectionfrom cable damage, bad contact or TEC element withtoo highresistance. When
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© 2016 Thorlabs
2 Getting Started
7
tripped, a warning is output, butthe output remains switched on- the reasonis that evena wrong
TEC as still capable to cool the laser diode.
·Separate on and off function for each module
Protectionfrom operating errors.
·Control LED for activated TEC current
Protectionfrom accidental disabling of the temperature control..
·Separate over-temperature protection for each module
Protectionagainst thermal failure of the module.
·Laser Protection can be coupled to a temperature window, if TED8000 modules are present
withinthe same PRO8000 mainframe.

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TED8000
2.3 Operating Elements
Note
This figure is valid for allTED8000 modules with the exception of the TED8080 which is of double
width.

© 2016 Thorlabs
3 External Connections
9
3 External Connections
3.1 TED80x0
Pin Assignment of the Output Connector
Female 15 pin D-SUB Connector
Pin
Connector
TEC Element
5, 6, 7
TEC Element +
13, 14, 15
TEC Element - (GND)
2
Voltage Detector TEC Element +
9
Voltage Detector TEC Element -
Status Display
1
Status LED - Anode
8
Status LED - Cathode (GND)
Temperature Sensor
3
Thermistor - (GND)
4
Thermistor +
10
AD590 -
11
AD590 +
12
(leave open)
We recommend to use separate wires drilled in pairs (twisted pair) in a common shield for TEC
current and temperature sensor, respectively. The shield must be connected to ground potential
(pin 13, 14, 15).
For a 4-point measurement of the TEC voltage connect the TEC element to pin2 and 9 to measure
the voltage directlyat the TEC element.

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TED8000
3.2 TED80x0-PT
Pin Assignment of the Output Connector
Female 15 pin D-SUB Connector
Pin
Connector
TEC Element
5, 6, 7
TEC Element +
13, 14, 15
TEC Element - (GND)
2
Voltage Detector TEC Element +
9
Voltage Detector TEC Element -
Status Display
1
Status LED - Anode
8
Status LED - Cathode (GND)
Temperature Sensor
3
Pt-100 Current Source - (GND)
4
Pt-100 Current Source +
10
Pt-100 Voltage Measurement Input -
11
Pt-100 Voltage Measurement Input +
12
(leave open)
We recommend to use separate wires drilled in pairs (twisted pair) in a common shield for TEC
current and temperature sensor, respectively. The shield must be connected to ground potential
(pin 13, 14, 15).
For a 4-point measurement of the TEC voltage connect the TEC element to pin2 and 9 to measure
the voltage directlyat the TEC element.

© 2016 Thorlabs
3 External Connections
11
3.3 TED80x0-KRYO
Pin Assignment of the Output Connector
Female 15 pin D-SUB Connector
Pin
Connector
Heater Element
5, 6, 7
Heater Element +
13, 14, 15
Heater Element - (GND)
2
Voltage Detector Heater Element +
9
Voltage Detector Heater Element -
Status Display
1
Status LED - Anode
8
Status LED - Cathode (GND)
Temperature Sensor
3
Pt-1000 Current Source - (GND)
4
Pt-1000 Current Source +
10
Pt-1000 Voltage Measurement Input -
11
Pt-1000 Voltage Measurement Input +
12
(leave open)
We recommend to use separate wires drilled in pairs (twisted pair) in a common shield for TEC
current and temperature sensor, respectively. The shield must be connected to ground potential
(pin 13, 14, 15).
For a 4-point measurement of the TEC voltage connect the TEC element to pin2 and 9 to measure
the voltage directlyat the TEC element.

© 2016 Thorlabs12
TED8000
3.4 Connecting a Thermistor
The thermistor is connected betweenpin3 and pin4:
3.5 Connecting an AD590
The IC-temperature sensor AD590 is connected betweenpin10 (-) and pin11 (+).
3.6 Connecting a LM335
The IC-temperature sensor LM335 is connected betweenpin10, 11 (+) and pin 8 (-).
3.7 Connecting a Pt-100 or Pt-1000
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. Connect one end of the sensor pin 4
and 11, the other - to pin3 and 10.
Pin3 is connected internallyto commonground via a 10 Wresistor.
What happens if the sensor is faulty or connected wrongly
The measurementinputs (pins 10 and 11) are connected internally to the output pins of the current
source (pins 3 and 4) via a 1 kWresistor.Therefore the following behavior canbe expected in case
of a faultysensor or missing connection:
·No sensor connected:
Error message „No Sensor“; the displayshows the upper range limit for actual resistance or
actual temperature. The output cannot be activated.

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3 External Connections
13
·Pin 10 and / or Pin 11 are not connected:
The resistance measurement is done as 2-wire measurement, the resistances of cable and
connectors are included inthe measurement. The 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 inthe measurement. The temperature control works at normal
conditions.
3.8 Connecting a TEC Element with Voltage Detector
The TEC element is connected between pins 5, 6, 7 (plus pole) and pins 13, 14, 15 (minus pole).
For a 4-point measurement of the TEC voltage, connect the TEC element to pin 2 and 9 to
measure the voltage directlyat the TEC element.
Pin 2 and pin 9 may also be connected directly to the plug at the temperature module (i.e. pin 2
with pin 5,6,7 and Pin 9 with pin 13,14,15), but this may lead to a measurement error due to a
voltage drop across the cable to the TEC element, caused by the TEC current. The indicated
voltage willthenbe slightlyhigher.
4-pole Measurement of the TEC Voltage
Attention
An reverse poled TEC element may lead to a thermal runaway and destruction of the connected
components. Please refer to sectionPolarityCheck of the TEC Element .
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TED8000
3.9 Polarity Check of the TEC Element
Pre-Settings
·Connect TEC element and temperature sensor. The sensor must be ingood thermalcontact
to the active surface of the TEC element.
·Switchonthe PRO8000 (-4) / PRO800 system.
·Select the TED8000 module.
·Select the correct type of sensor.
·Set the correct value for IMAX.
Polarity check of the TEC element
Observe TACT (or RACT)and switchonthe module bypressing the key”ON/OFF”
·If TACT (or RACT) runs awayfrom TSET (or RSET), the TEC element is reverse poled. Change
polarityand repeat the procedure.
·If TACT (or RACT) is oscillating around the value TSET (or RSET), the TEC element is connected
correctly, but the P, Iand D share values of the control loop are still incorrect. (Refer to
sectionPID Ajustment )
·If TACT (or RACT) is settling properlyto the value TSET (or RSET), the TEC element has been
connected correctly, the values for the P-,I- and D-share of the control loop maystillneed
improvement.
3.10 Connecting the Status Display LED
To display the operating status a standard LED may be used between pin 1 and pin 8. The LED
willlight up whenthe current output is switched on.
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4 Optimizationof Temperature Control
15
4 Optimization of Temperature Control
4.1 Principle Setup and Function
A typicallaser diode module comprises
·the laser diode chip that needs to be temperature controlled;
·the temperature sensor;
·the TEC element;
·the thermal conductor (copper block) that establishes the thermal contact betweenthe laser
and the TEC, as well betweenthe laser and the temperature sensor and
·the heat sink.
Possible error sources that impact the temperature control
1. The sensor is not indirect thermal contact with the laser chip. The inhomogeneous temperature
within the copper block ("temperature gradient") influences the measurement. Even within the
laser chip a temperature gradient is present. Thus,a correct measurement of the real laser chip
temperature is not possible. Offset and gain errors of the sensor allow only an estimate of the
laser temperature.
Possible optimization: Sensor calibration
2. A change of the internal power dissipation of the laser, e.g. due to change of the laser current,
changes the temperature gradient between laser and sensor as well. This results in a
measurement error depending on the mechanical setup of the laser chip and the sensor. Slow
changes of the ambient temperature, however, will be compensated well by the control loop
since the influence of the ambient temperature onthe laser diode canbe neglected.
Possible solution: optimized thermal design
3. The transient response after setting a new temperature is limited since the heat transport in the
copper block is relatively slow. Furthermore, the sensor must settle to the laser temperature - it
also has a non-negligible thermal capacity.
Possible optimization: careful adjustment of PID parameters

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TED8000
4.2 PID Adjustment
Temperature control loops are comparatively slow; control oscillations appear with a frequency in
the range of several Hzor parts of Hz. The PID adjustment allows to optimize the dynamic behavior.
The TED8000 modules allow to set the three parameters P, Iand D independently within the range
from 0.1% to 100%.
Example of a PID adjustment
(Pre-conditions: All limit values have been set correctly, all polarities are correct, all set and
relevant calibrationvalues are entered, ambient temperature is about 20°C)
·Switchoff the I-share.
·Set the P-, I- and D-share to 1%. Please refer to sectionSetting the P, Iand D Share of the
Control Loop .
·Switchonthe output and observe the temperature.
P-share
·Change the set temperature repeatedlybetween18 °C and 22 °C while observing the settling
behavior of the actual temperature.
·Increase the P-share gradually. Higher values will increase the settling speed, too high values
make the system oscillate.
The P-share has been set correctly when the actual temperature remains stable near the set
temperature after 2-3 overshoots.
D-share
·Change the set temperature repeatedlybetween18 °C and 22 °C while observing againthe
settling behavior of the actualtemperature.
·Increase the D-share gradually. Higher values willdecrease 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
·Turnonthe I-share.
·Change the set temperature repeatedlybetween18 °C and 22 °C .
·Increase the I-share gradually. Higher values willaccelerate the settling to the set
temperature.
The I-share is set correctly when the actual temperature reaches the set temperature in shortest
time without overshoots.
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5 Operating Instruction
17
5 Operating Instruction
Note
All settings that are made to the TED8000 modules via the Control Panel of the PRO8000
mainframe are applied immediately; no need to confirm settings.
5.1 Pre-Settings
The maximum TEC Current can be limited in order to protect the TEC element. There are two
different limits:
Setting the Hardware Current Limit ILIM
The hardware limit ILIM is set with the potentiometer 5 marked ILIM at the front panel of the
module. The value is displayed continuouslyinthe channel menuof the module so you can observe
it during adjustment:
Software Limit IMAX
The software limit IMAX is set in the channel menu or via the IEEE488 interface by the control
software, and affects the current control of the TED8000 module via the D/A converter. It yields
exactlythe same protective functionas the hardware limit. See sectionChanging Parameters .
Note
The TEC currentlimitationis enabled at the lower value of the two limits IMAX or ILIM.
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TED8000
5.2 Functions in the Main Menu
Display
The main menu shows the channel number, the main operating parameter and the type of
temperature sensor ofthe TED8000 module.
Main Parameter
Whenthe module is switched off,the mainparameter is the set temperature TSET.
After switching on the module, the LED “ON” on the front of the module lights up and the main
parameter changes to the actual temperature TACT.
Note
Even witha thermistor temperature sensor, the "temperature" is shownin°C. If the thermistor is not
calibrated, the displayed temperature maybe wrong.
Selecting a Module
Select a module for further input bysetting the cursor to the channel number of the desired module
using the softkeys and .
CH4|
Pressing willlead to the channel menu .
Setting the temperature
To set the set temperature inthe mainmenu, select the corresponding module (here CH2) with the
cursor:
8
20