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juami / pytentiostat

python code for the JUAMI potentiostat
BSD 3-Clause "New" or "Revised" License
9 stars 13 forks source link

Current/voltage values seem off #99

Closed jlhitt1993 closed 5 years ago

jlhitt1993 commented 5 years ago

When I do a scan in the positive direction, the current reads negative and vice versa. Hopefully just a sign issue but I'm not sure if the voltage is flipped or the current.

aplymill7 commented 5 years ago

Can you simultaneously measure with a multimeter to confirm? At least can tell if voltage is.

jlhitt1993 commented 5 years ago

Yes, I tested it and the readings I got matched the values saved and graphed. The issue here is that we get a negative current from a positive voltage... Not sure what to make of it.

aplymill7 commented 5 years ago

Okay yeah that's just a sign issue from definition.

mspence2 commented 5 years ago

Just for confirmation, based on the measurements I have done in the past the voltage applied sweeps the direction that it is told. So it should be a sign issue with the current.