AMETEK ASD Series - Manual (Page 41)

Sorensen ASD Series Operation
M551177-01 Rev A 3-3
3.3.3 VOLTAGE MODE OPERATION
When the supply is in the Voltage mode, the output voltage of the supply
is controlled by the digital Voltage setpoint on the MODBUS control
interface GUI or by the remote voltage input. See Section 3.5. The digital
Current setpoint (or remote current input) operates as a current limit. The
output voltage is regulated at the selected value while the output current
varies with the load requirements. To verify operation in Voltage mode,
follow the steps below:
1. Connect a digital voltmeter (DVM) across the rear panel positive
and negative output terminals, observing the correct polarity.
Make sure the DVM is in the dc voltage mode and the range is
adequate to handle the full-scale voltage of the power supply.
2. Apply input voltage to power supply
3. Once the MODBUS control interface is connected to power supply
(See 4.6.1), Set the Current and power setpoint sliders above 0
Amps and 0 watts. Slowly increase the Voltage setpoint slider and
observe both the unit readback on Master controls tab and the
output of the DVM. The minimum range should be from 0V to the
maximum rated voltage output of the supply. The unit readback
and DVM readings should track within the accuracies of the meter
and the readback.
4. Check that in unit readings, Vmode box is black meaning that unit
is in voltage mode. Turn the Voltage setpoint and Current setpoint
fully to zero.
5. Turn power supply input voltage off.
If Voltage mode operation did not function as indicated above, recheck
your setup and perform the check again. If the function continues to fail,
contact the factory for assistance.