© 2016 Thorlabs GmbH
60
PM320E
7.4 Troubleshooting
Ø
Unit does not work at all (no display at the front)
§
Is the PM320E connected properly to the mains?
-
Check the mains cable and the
.
§
Is the PM320E turned on?
-
Turn on the mains switch of your PM320E.
§
Check the
on the rear panel.
-
If blown, replace the fuse with the correct type.
Ø
Power reading is zero (-----)
§
A photodiode sensor is connected
-
Check if the channel display is in the right mode to display absolute power
-
Conduct the dark current adjustment procedure
§
A thermal sensor is connected
-
Check if the channel display is in the right mode to display absolute power
-
Conduct the dark current adjustment procedure
§
A photodiode is connected
-
Check the polarity setting. If not known, switch to the current display. The displayed
current must be positive, otherwise change the polarity.
Ø
Power display does not update
§
Check for correct selection of the trigger source (Auto)
Ø
Pulse Energy cannot be measured or is measured wrong
§
Check for correct selection of the trigger source (Auto)
§
Check for correct trigger level (must be between noise level and expected pulse height)
§
Check if the used energy sensor is able to handle the repetition rate of the laser
