Functional Tests
TM-F1OP-C1XN-01 2-11
Voltage Mode Operation Check
To perform the voltage mode operation check:
1. Ensure the voltage and current controls on the front panel are turned
fully counter-clockwise.
2. Connect a DVM to the output terminals on the rear panel, observing
correct polarity.
3. Turn the current control a 1/2-turn clockwise. Slowly turn the voltage
control clockwise and observe both the front panel voltmeter and the
DVM.
4. Compare the DVM reading with the front panel voltmeter reading to
verify the accuracy of the internal voltmeter. Both readings should be
the same. The minimum control range is from zero to the maximum
rated output for the power supply model. The voltage mode LED
turns on.
5. Turn the front panel AC power switch to OFF.
Current Mode Operation Check
To perform the current mode operation check:
1. Ensure that the front panel power switch is set to OFF.
2. Turn the voltage and current controls on the front panel fully
counter-clockwise.
3. Connect the DC shunt across the output terminals on the rear panel.
4. Connect the DVM across the DC shunt.
5. Turn the AC power switch to ON.
6. Turn the voltage control one (1) or two (2) turns clockwise.
7. Turn the current control slowly clockwise.
8. Compare the DVM reading with the front panel ammeter reading
using I=V/R where I is the current, V is the DVM reading, and R is
the DC shunt resistance. The minimum control range is from zero to
the maximum rated output for the power supply model. The current
mode LED turns on.
9. Turn the front panel power switch to OFF.
10. Disconnect the DVM and the shunt.
TM-F1OP-C1XN-01.book Page 11 Thursday, October 25, 2007 9:04 PM
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