Voltage mode operation check, Press out on/off button to turn the dc output off, Turn the front panel ac power switch to off – Xantrex Technology XPR 150-40 User Manual
Page 39: Current mode operation check, Connect the dvm across the dc shunt, Turn the ac power switch to on, Turn the current control slowly clockwise, Turn the front panel power switch to off, Disconnect the dvm and the shunt

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