Chapter 3 Constant Current Tests RIGOL
DP1308A Performance Verification Manual
3-9
4. Measure the programming accuracy and readback accuracy under rated output
current.
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 of the channel to be tested (according to the Table 3-5):
APPLy P6V,5,5 (for +6V/5A channel)
APPLy P25V,5,1 (for +25V/1A channel)
APPLy N25V,-5,1 (for -25V/1A channel)
Send the OUTPut:STATe {P6V|P25V|N25V},ON command to enable
the output of the channel to be tested.
2) Keep the electronic load in short-circuit mode and the output status of the
power supply should be CC. Read and record the measurement value U
3
on
the multimeter. Calculate the current I
3
=U
3
/R.
3) Send the MEASure:CURRent? {P6V|P25V|N25V} command via the
remote interface (USB, LAN or GPIB) to read and record the current I
4
.
4) Calculate the programming accuracy: |I
3
-rated output current of the channel
under test|;
Calculate the readback accuracy: |I
4
- rated output current of the channel
under test|.
5) Compare the measurement results with the specifications in “Appendix B:
Specifications”.
Table 3-5 Setting and specification of CC programming and readback accuracy test
(rated output current)
Channel +6V/5A -25V/1A +25V/1A
Voltage (V) 5 5 -5
Current (A) 5 1 1
Specification
Programming: 0.5mA
Readback: 0.5mA
Programming: 0.1mA
Readback: 0.1mA
5. Repeat steps 1 to 4 to test the CC programming accuracy and readback accuracy
of the other two output channels.
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