Chroma 66202 Power Meter calibration catch 22

[Electrole]

I have a Chroma 66202 Digital Power Meter that provided measurement results a bit too off. Consequently, I decided to calibrate it. There's a description in the manual, so what could go wrong? As it turned out, everything with the calibration of the Chroma 66202 can go spectacularly wrong! The issue is that if an error during the calibration happens, like a voltage is not present when it is supposed to be present, which actually happended in my case, the 66202 apparently saves a way off calibration factor. Then, when attempting to carry out a measurement or a calibration again, the 66202 deems the signal faulty, as the erronous calibration factor is used, and following this, the 66202 will not correct the calibration factor. Indeed a catch 22 of calibration designed into the 66202. My 66202 is now rendered utterly useless. 

There does not seem to be any command to reset the calibration constant, nor any power-on hardware feature that could put the 66202 into a well-known state. Contacting Chroma had the expected result: Zero support. I then had the idea that I could perhaps analyze the bit code of an EEPROM and identify the calibration constants, and change them as needed. Another solution could be to get a fresh bit file and update the contents of the EEPROM in question.

Does anyone of you have any experience with this issue with the Chroma 66202 
Suggestions are appreciated...

Best regards