THORLABS TED8000 Series, Operation Manual

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© 2016 Thorlabs 6
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
you have inspected the TED8000 mechanically and electrically.
Verify that you have 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 with respect to the maximum current, resolution and accuracy (see
Technical Data )
The TED8000 modules contain a closed loop amplifier with adjustable settings for P (proportional),
I (integral) and D (differential) share.
Supported temperature sensors
· Standard thermistors (NTC - Negative Temperature Coefficient Thermistor) within two ranges
- max. 20 k
W
and max. 200 k
W
· IC temperature sensors (AD590, AD592, LM335)
· Pt-100 and Pt-1000 (RTD - Resistance Temperature Detectors)
All necessary value settings are made by the mainframe operating elements (keypad and rotational
encoder) or via remote control by a computer. The only parameter 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 with a 12 bit resolution.
The actual temperature (resistance) is read back with 16 bit; the TEC current, TEC voltage and the
limit for the TEC current (hardware limit) with 15 bit plus sign.
The P, I and 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 well as the module itself will provide an excellent suppression of 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
Protection from the use of not supported temperature sensors and from interrupted sensor
connection.
·
Open-Circuit Protection of the connection cable to the TEC element
Protection from cable damage, bad contact or TEC element with too high resistance. When
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