AMETEK SGA Series - Manual (Page 61)

Sorensen SGA Series Operation
M550129-01 Rev AG 3-11
3.3.2 CONSTANT-VOLTAGE MODE OPERATION
When the power supply is in the Constant-Voltage mode, it functions as a
voltage source, and the output voltage of the supply is controlled by the
Voltage knob on the front panel or by the remote analog voltage
programming input; see Section 3.6. The output voltage is regulated at the
selected value while the output current varies with the load requirements. The
Current knob (or remote current programming input) sets the maximum level
of output current before mode transition would automatically occur to
Constant-Current operation. To verify operation in Constant-Voltage mode,
follow the steps below:
1. Ensure that there is no load connected to the output.
2. Ensure that the remote sense is connected to the output terminals.
3. 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.
4. Rotate the Current control knob about 1/2 turn clockwise (this adjusts
the current setting to a value above zero to ensure ability to supply
current)
5. Switch the power supply on.
6. Slowly rotate the Voltage knob clockwise and observe both the front
panel voltage display and the output of the DVM. The output voltage
should increase from 0 V to the maximum rated voltage of the supply.
The front panel display and DVM readings should track within the
accuracies of the meter and the front panel display.
7. Check that the green Voltage Mode LED is on.
8. Turn the Voltage knob and Current knob fully counterclockwise.
9. Switch the power supply off.
10. If Constant-Voltage mode operation did not function as indicated
above, verify your setup and perform the check again. If the function
continues to fail, contact the factory for assistance.