Service Manuals, User Guides, Schematic Diagrams or docs for : Stanford Research Systems www.thinksrs.com-LDC Note 3 TEC Load Response
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>> Download www.thinksrs.com-LDC Note 3 TEC Load Response documenatation <<Text preview - extract from the documentLoad Response of LDC501 TEC Controllers
Rev B. Revised Oct 2012
Figure 1 Thermal load response test setup
An important property of a TEC controller is its Tests were done to show the TEC's response to
dynamic response to a thermal load change. For thermal load changes. Figure 1 shows the test
example, when the laser current changes, the setup.
heating capability changes, which in turn causes
temperature to change. The TEC controller will A 10 resistor is located on a TEC cooled metal
sense this change and make a correction to bring plate. A current change in the 10 resistor will
temperature back to the set value. cause a thermal load change. A NTC thermistor
(MC65F103C) is used in the control loop. This
The Stanford Research Systems' LDC500, thermister has a 10k resistance at 25C.
LDC501 and LDC502 controllers have an Auto
tuning capability to find PID parameters which The LDC501 was set to 25.000
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