RIGOL
Chapter 2 Constant Voltage Tests
DP1308A Performance Verification Manual
2-12
CV Programming and Readback Accuracy
Programming accuracy and readback accuracy verify the high accuracy and
programmable performance of the power supply.
1.
Turn off DP1308A. Connect DP1308A, AC source and multimeter according to
Figure 3-1.
2.
Turn on the AC source and set its voltage to the AC line voltage.
3.
Measure the CV programming accuracy and readback accuracy under 0V voltage.
1)
Turn on DP1308A. Execute the following operations via the remote interface
(USB, LAN or GPIB):
Send command to select the channel to be tested and set its voltage and
current (according to the Table 2-6):
APPLy P6V,0,5.25 (for +6V/5A channel)
APPLy P25V,0,1.05 (for +25V/1A channel)
APPLy N25V,0,1.05 (for -25V/1A channel)
Send the OUTPut:STATe {P6V|P25V|N25V},ON command to enable
the output of the channel to be tested.
2)
Turn the multimeter on and select DCV measurement function. The output
status of the power supply should be CV. Read and record the current
reading U
1
on the multimeter.
3)
Send the MEASure:VOLTage? {P6V|P25V|N25V} command via the
remote interface (USB, LAN or GPIB) to read and record the voltage U
2
.
4)
Calculate the programming accuracy |U
1
-0|;
Calculate the readback accuracy |U
2
-0|.
5)
Compare the measurement results with the specifications in “Appendix B:
Specifications”.
Table 2-6 Setting and specification of CV programming and readback accuracy test
(0V voltage)
Channel
+6V/5A
+25V/1A
-25V/1A
Voltage (V)
0
0
0
Current (A)
5.25
1.05
1.05
Specification
Programming: 0.5mV
Readback: 0.5mV
Programming: 1.5mV
Readback: 1.5mV
