User Manual

Series 2200 Programmable DC Power Supplies Reference Manual Appendix B: Calibration
2200S-901-01 Rev. A/November 2011 B-23
Check DC overvoltage detection
This check procedure uses the same test setup as the previous procedure. (see Check DC voltage
accuracy without remote sense and voltage readback accuracy (on page B-17))
Ensure the warm-up criteria has been met as described in the Performance Verification Conditions.
1. Set the voltmeter as follows:
a. Set to measure DC volts.
b. Set to auto range.
c. Verify that the Math mX+b function is disabled (shift Dcv), assuring that volts are being read.
2. Set the electronic load as follows:
a. Set to Constant Current.
b. Set to draw 1 Amp.
3. Set the DUT to 100% of the full scale (FS) output current.
4. Set the DUT to 4 V output voltage.
OVP and Max Volt Set are submenus of the Protect menu.
5. Set the DUT OVP (Over Voltage Protection) to ON, set the OVP threshold to 5 V, and turn Max
Volt off as follows:
a. Press Shift and Menu (1).
b. Press the down arrow until Protect is shown and press Enter.
c. Press the down arrow until OVP Set is shown and press Enter.
d. Press the down arrow until On is shown and press Enter.
e. Press 5 and press Enter.
f. Press the down arrow until Max Volt Set is shown and press Enter.
g. Press the down arrow until Off is shown and press Enter.
h. Press the Esc key as needed to exit the menu system.
6. Turn the DUT output on.
During the next step, closely monitor the voltmeter reading. Noting the highest output voltage
achieved before OVP is triggered.
7. Slowly increase the DUT output voltage until OVP is triggered. When triggered, the output voltage
abruptly drops below 1 V, signals with beeps, and OVP is indicated in the display.