Service Guide 5
U8001A/U8002A User’s and Service Guide 49
Constant Voltage (CV) Verification
Voltage Programming and Readback Accuracy
This test is to verify that the voltage programming and readback
accuracy are within published specifications.
Procedures:
1 Power off the power supply and connect a DMM between the
(+) and (–) terminals of the output to be tested. Remove the
electronic load or resistor block as shown in Figure 5- 2 (A),
to operate as an open circuit.
2 Power on the power supply.
3 When the power supply is in limit mode, program the output
voltage to 0 V and the output current to the maximum
programmable value.
4 Enable the output.
5 Wait for a few seconds for the output of the power supply to
settle. Make sure that the power supply is in CV mode.
6 Record the voltage reading on the DMM (V
DMM
). This value
should be within the limit of 0 V ± 20 mV.
7 When the power supply is in meter mode, record the voltage
reading displayed on the front display of the power supply.
This value should be within the limit of V
DMM
± 20 mV.
8 Disable the output.
9 When the power supply is in limit mode, program the output
voltage to full rated value, i.e. 30 V.
10 Enable the output.
11 Wait for a few seconds for the output of the power supply to
settle. Make sure that the power supply is in CV mode.
12 Record the voltage reading on the DMM (V
DMM
). This value
should be within the limit of 30 V ± 0.125 V.
13 When the power supply is in meter mode, record the voltage
reading displayed on the front display of the power supply.
This value should be within the limit of V
DMM
± 0.125 V.
To Next Page
Loading...
Need help?
General
