RIGOL Chapter 3 Constant Current Tests
DP800 Performance Verification Manual
CC Programming and Readback Accuracy
CC programming accuracy refers to the error between the current setting value of
the channel and the actual output current value when the power supply is in CC
mode; CC readback accuracy refers to the error between the actual output current
value and the readback current value when the power supply is in CC mode.
DP831A is taken as an example to test the CC programming and readback accuracy
of DP800 series in the following section.
Note: During the actual test, please select the corresponding test record form
according to the model of the DP800 power supply under test to set the
corresponding parameters, record and calculate the corresponding specifications.
Specification:
Annual Accuracy
[1]
(25℃±5℃)± (Output Percentage+Offset)
Channel Programming Readback
DP831A
CH1
CH2
CH3
0.2%+10mA
0.2%+5mA
0.2%+5mA
0.2%+10mA
0.1%+5mA
0.1%+5mA
DP832A
CH1
CH2
CH3
0.2%+5mA
0.2%+5mA
0.2%+5mA
0.15%+5mA
0.15%+5mA
0.15%+5mA
DP832
CH1
CH2
CH3
0.2%+10mA
0.2%+10mA
0.2%+10mA
0.15%+5mA
0.15%+5mA
0.15%+5mA
DP821A
CH1
CH2
0.2%+10mA
0.2%+10mA
0.15%+10mA
0.15%+10mA
DP811A CH1 0.1%+10mA 0.1%+10mA
Note
[1]
: The accuracy parameters are acquired via calibration under 25℃ after 1-hour warm-up.
Test Procedures:
1. Turn off DP800. Connect DP800, AC power supply, current sampling resistor (the
resistance R
M
is 0.022Ω) and multimeter according to Figure 3-1. Please pay
attention to the connection method of the current sampling resistor and the
channel output terminals of DP800 as well as the connection method of the
current sampling resistor and multimeter. Here, CH1 is taken as an example and
the connection method is also applicable to CH2 and CH3. Then, connect the
power supply with PC (take the connection via USB cable as an example) via the
remote interfaces (USB, GPIB, LAN).
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