Enable alternative current calibrations

[tsaavik]

Many bench power supplies can not provide 2amp CC.
Please enable lower(and possibly higher?) amperage calibrations.

For example:
My bench meter supplies 1.50amps CC, if I calibrate with this as my amperage, my readings are off by ~300-500ma. The Reload Pro even shows a 320ma load with the probes unplugged.

Thank you!