Hello,
My PPK2 is reporting 2 zetta amperes power usage, and I found out that the "modifiers" appear really broken:
Calibrated: 0 R0: 3095044895830869060112875520.0000 R1: 0.0000 R2: 0.0000 R3: 0.0000 R4: 0.0000 GS0: 0.0000 GS1: 138.3582 GS2: 21.5994 GS3: 3.0130 GS4: 0.0876 GI0: 1.0000 GI1: 0.9614 GI2: 0.9534 GI3: 0.9415 GI4: 0.9521 O0: 0.0000 O1: -2814926129201152.0000 O2: 0.0000 O3: -2251799813685248.0000 O4: 0.0000 VDD: 3300 HW: 54350 mode: 2 S0: -0.000000009 S1: -0.000000064 S2: -0.000000512 S3: -0.000004891 S4: 0.002447326 I0: 0.000000044 I1: 0.000000364 I2: 0.000061116 I3: -0.000254856 I4: -0.007713722 UG0: 1.00 UG1: 1.00 UG2: 1.00 UG3: 1.00 UG4: 1.00 IA: 58 END
I have attempted to re-flash the ppk2 firmware, but that had no effect.
This affects both measurement modes, but in source mode the correct voltage is still output.
Intercepting the modifiers before they are parsed and replacing them with some from a different PPK2 again results in plausible measurements.
This may be related to accidentally writing a binary image intended for a different device onto the PPK2 serial port, assuming there are serial commands to configure those values which do not verify plausibility and do not have a checksum.
Is it possible to re-calibrate the device, or will it have to be replaced?
