AMETEK SGI Series - Manual (Page 62)

Calibration and Verification Sorensen SGI Series
3-10 M550221-01 Rev AA
3.2.3 Constant-Voltage Mode Operation
In Constant-Voltage mode operation, the output voltage is regulated at the
programmed value while the output current varies with the load requirements.
The voltage could be programmed either through the front panel or by the
remote analog voltage programming input; see Section 3.11. To verify
operation in Constant-Voltage mode, follow these steps:
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. Apply power to the AC mains input, and turn on the power supply.
5. If the default power-on state had previously been configured to be OFF,
when the supply reaches the Home menu Page 1, enable the output by
pressing “Output On/Off”.
6. Enter the Default Programming menu by pressing either of the
voltage, current or overvoltage front panel keys:
7. Program the Current to 10% of rated output (this programs the
current above zero to enable supplying output current while in the
constant-voltage mode). See Section 3.8.1 for more details on
programming.
8. Navigate to Voltage programming. With the Editing Arrow adjacent to
“Set Volt”, press and hold the NavPad up arrow and observe both the
front panel voltage display and the output of the DVM begin to accelerate
up. 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.
9. Verify the front panel Constant Voltage Mode indicator is on.
10. Program the Voltage and Current back to zero.
11. Turn the power supply off.
12. If Constant-Voltage mode operation did not function as indicated above,
verify the setup and perform the check again. If the function continues to
fail, contact the factory for assistance.