I broke a pin on the K_SER relay when I was removing it to replace the diode.
Probably I had not completely freed the pin from solder and didn't notice when trying to free the relay. New K_SER relay installed, now serial coupling works as well as parallel.
Now, I want to test power on each channel. I used the 2 Ohm 100W resistor that I originally calibrated with. I can max out power at 30W per channel. Voltage displayed is not quite right (in CC, 8V limit on the PSU display shows as 7.9V read on my meter, read directly at the terminals).
I tried to re-calibrate using that same resistor, but I'm not succeeding. In the calibration wizard:
- Channel 1, step 1, I'm reading 92.8mV, step 2 I'm reading 115mV and can't get past that point in the wizard because I'm out of range.
- Channel 2, step 1, I'm reading 125.5mV, step 2 I'm reading 125.6mV; again out of range and can't get further.
Is there a (re-)calibration bug in the v1.0 firmware?
Also, when parallel coupled, which remote sense terminals are active?