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ITC8000
6.5 Error Messages
Error messages are shown in the bottom line of the display independent of the actual menu (main
menu or channel menu). If an error occurs while the module is switched on, the display shows for
example:
Possible error messages for an ITC8000 module
1. During operation (operation interrupted)
Vcc fail Internal supply voltage failure. Please contact Thorlabs .
OTP Over Temperature Protection. Module has been switched off due to
overheating. The module can be switched on only after cooling down.
ctrl TEMP TACT exceeded TWIN. Laser current switched off.
OPEN Connection to the laser was interrupted during operation, or the laser
forward voltage exceeded the compliance voltage of the ITC8000 module.
The laser current switched off.
OPEN TEC Connection to the TEC element was interrupted during operation, or TEC
resistance increased too high. TEC current switched off.
SENSOR Connection to the sensor was interrupted during operation. TEC current
switched off.
INTERLOCK Interlock circuit was interrupted during operation. Laser current switched off.
2. When attempting to change parameters during operation
NOT IF LD ON The parameters LDPOL, PDPOL, C and Twin cannot be changed when
the laser is switched on.
NOT IF TEC ON The thermistor calibration parameters, the thermistor calibration method and
the sensor type cannot be changed when the TEC is switched on.
3. When attempting to switch on the laser current
Vcc fail Internal supply voltage failure. Please contact Thorlabs .
OTP Over Temperature Protection. Module has been switched off due to
overheating. The module can be switched on only after cooling down.
INTERLOCK Interlock circuit is open. Laser current cannot switched on.
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