Operating the Power Supply Locally
3
Series N8700 User’s Guide
41
6
Press the OVP/UVL button again. Rotate the voltage knob and
reset the OVP level of the unit to its maximum setting.
UVL Check
1
Press the OVP/UVL button twice so that the DC AMPS display
indicates UUL. The DC VOLTS display shows the UVL level.
2
Use the voltage knob and set the UVL level of the unit to 50% of
its full-scale voltage rating or 30 volts, whichever is lower.
3
Wait a few seconds until the DC VOLTS display returns to show
the output voltage.
4
Use the voltage knob and lower the output voltage of the unit
until it approaches the UVL setting. Check to make sure that the
output voltage cannot be set lower than the UVL setting.
5
Press the OVP/UVL button twice. Rotate the voltage knob and
reset the UVL level of the unit to its minimum setting.
Constant Current Check
1
Turn the POWER switch off. Wait a few seconds until the AC
indicator on the front panel goes out.
2
Use a heavy wire and short the +V and –V output terminals
together.
3
Turn the POWER switch on.
4
Turn the output on by pressing the OUT ON button. The green
OUT ON indicator should be illuminated. The green CC indicator
should be also illuminated.
5
Rotate the current knob while observing the DC AMPS display.
The output current should vary while the knob is turned. The
current range is from zero to the maximum rated output for the
power supply model.
OCP Check
1
Rotate the current knob and set the current limit of the unit to
about 10% of its full-scale current rating.
2
Press the OCP/488 button. This should trip the OCP protection.
The OCP indicator should be illuminated, the DC VOLTS display
should indicate OCP, and the Alarm indicator should be blinking.
3
Press the OCP/488 button again to cancel OCP protection. The
DC VOLTS display should indicate OFF because the OCP
protection is latched.
4
Press the OUT ON button to reset the OCP protection. The output
should return to its previous setting.
5
Turn the POWER switch off.
6
Remove the short from the +V and –V output terminals.
