TNP #51 - Thorlabs PM320E Dual Channel Optical Power & Energy Meter Teardown, Repair & Experiments 

In this episode Shahriar takes a look at faulty Thorlabs optical power meter which has been scored from eBay at a very low price. The listing shows the screen with a white background without any text. Upon close inspection however, it is clear that the screen contrast is the problem. The fault is traced to a basic voltage setting problem (230V versus 115V) which was causing the +/-15V supplies to be significantly under biased.
With the screen issue resolved, the unit is paired with two C-series optical detectors. Various laser power measurements & experiments demonstrate the full functionality of the unit.
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