Troubleshooting - THORLABS ITC4000 Series Operation Manual

5.4 Troubleshooting

In case that your ITC4000 shows malfunction, please check the following items:
Ø
Unit does not work at all (nothing is shown on the display at the front):
·
Is the ITC4000 connected to the mains properly?
·
Is the ITC4000 turned on?
·
Check the fuses on the rear panel (see section
please replace the fuses by the correct type.
·
Check via SCPI interface if the unit works (see section
connect to the unit properly, please check display settings via remote control (brightness
and contrast).
Ø
The display works, but you don't get the desired operation temperature, current or
power:
·
Are the corresponding hardware limits set correctly? Please refer to section
LD source parameters
·
Is the laser diode / TEC setup connected correctly to the
17W2 DSUB jack
·
Is the interlock circuit close? Please refer to section
itoring .
18
·
Verify if the output voltage protection is set to a value grater than the nominal laser for-
ward voltage? Please refer to section
·
Please check all cables and the polarity settings. Please refer to section
ponents , to section
15
ode Parameters
·
Is a temperature sensor connected properly, and is the sensor type selection correct?
Check the corresponding connections and polarities of the temperature sensor (please
refer to section
tings (please refer to section
·
Check the TEC polarity (please refer to section
Ø
The optical output power in constant power mode is oscillating.
·
Please check the bandwidth for the constant power feedback loop in section
LD source parameters
Ø
The temperature in constant temperature mode is oscillating.
·
Please check the PID settings in section
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or to section
27
at the rear panel?
19
Laser Output Configuration
.
30
Connecting a temperature sensor
Temperature sensor setup
.
27
Replacing the mains fuses
Computer Interface
Setting the TEC source parameters
13W3 DSUB jack
Connecting Interlock and LD ON Mon-
Laser Output Configuration
and to section
26
). Check the temperature sensor set-
21
38
Connecting a TEC element
PID control loop settings
5 Maintenance and repair
). If blown,
59
). If you can
56
Setting the
37
15
.
26
Connecting com-
Setting the Photodi-
)
20
Setting the
41
and the
)
61