Current Calibration; Voltage Regulation - Xantrex XPH 35-5 Operating Manual

Current Calibration

Switch output OFF. Set output voltage to nominally 2V. Set current control to minimum. Connect
the DMM (set to Amps) and load in series across the output. Switch output ON.
Adjust VR8 (offset compensation of current control error amp) for a reading of 0.003A
± .001A on the DMM. Check that the CC LED is ON.
Increase voltage controls and current control to maximum. Adjust load until the DMM reads 5.00A
± 0.02A. Adjust VR7 (measured output current) until the Amps display matches the DMM reading.
Reduce load until the CC LED is ON. Adjust VR4 (maximum output current) until the Amps
display shows 5.05.

Voltage Regulation

Connect the DMM (set to Volts) across the output, no load, output ON.
Adjust voltage controls for a reading of 18.xxxx on the DMM; note exact reading.
Connect load, set current control to maximum and adjust load for 5A output current. Note that the
DMM should be connected at the 'back' of the output terminals, closest to the internal sense
connection, and the load plugged in to the 4mm sockets of the terminals. Adjust VR9/109
(differential voltage gain) until the external DMM matches the previous reading exactly.