THORLABS ITC8 Series Operation Manual page 74

68 Troubleshooting
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Do you have turned on the temperature controller in the main menu or one of
the sub-menus?
Change the status setting from "off" to "on".
The LED "ON" on the front panel of the module must be on
You don't get the desired operation temperature
Is the TEC connected properly to the front connector?
Check all cables.
Check the correct polarity (see section 1.6.9, "Polarity check of the TEC
element", page 22)
Is the temperature sensor connected properly and are his parameters entered
correctly?
Check the corresponding connections and polarities of the temperature
sensor (refer to chapters1.6.5, to 1.6.7)
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 precise calibration factors (thermistor). Refer to section 2.2.8.
If this does not help to resolve your trouble, please contact Thorlabs' Tech Support
(see section 5.7, "Addresses " on page 77).
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