AMETEK SGI Series - Manual (Page 64)

Calibration and Verification Sorensen SGI Series
3-12 M550221-01 Rev AA
11. If Constant-Current 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.
3.2.5 Overvoltage Protection
The Overvoltage Protection (OVP) function allows the supply to shutdown the
output, if it were to exceed a preset voltage. This may be used to protect
sensitive circuits or loads from damage caused by an excessive voltage on the
output of the supply. The Overvoltage Protection (OVP) could be programmed
either through the front panel or by the remote analog OVP programming
input; see Section 3.12. To verify OVP operation, follow these steps:
1. Make sure there is nothing connected across the output terminals.
2. Turn on the power supply.
3. if the default power-on state had been previously configured to be OFF,
when the supply reaches the Home Menu Page 1, enable the output by
pressing “Output On/Off”.
4. Enter the Default Programming menu by pressing either of the
voltage, current, or overvoltage front panel keys:
5. 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.
6. Navigate to OVP (Overvoltage) programming. The factory default setting
is approximately 110% of the maximum rated output of the supply. With
the Editing Arrow adjacent to “Set OVP”, press and hold the NavPad
down arrow and observe the front panel voltage display accelerate down.
Release the NavPad down arrow when the OVP is programmed to about
80-90% of the maximum rated output voltage value.
7. Navigate to Voltage programming. With the Editing Arrow adjacent to “Set
Volt”, press and hold the NavPad up arrow and observe the front panel
voltage display accelerate up. When the output voltage exceeds the OVP
trip point the OVP Warning screen will be display with the voltage level
reached at OVP trip. The Output State will be programmed to OFF, and
the voltage, current, and OVP settings will retain their previous settings.
8. Press (F4) and the fault screen will clear after 4 seconds. The Home
Menu Page 1 will be displayed, and the output will remain disabled.