RIGOL
Chapter 2 Constant Voltage Test
2-4
DP1116A Performance Verification Manual
CV Load Regulation Rate (CV Load Effect)
CV load regulation rate refers to the variation of output voltage when the load
changes from full load to no load while the power supply is in CV mode. In the
following section, the specifications at 16V/10A scale and 32V/5A scale are tested.
Specification:
Load Regulation Rate, ±(Output PerOffset)
Voltage
< 0.01% + 2 mV
Test Procedures:
1.
Turn off DP1116A. Connect DP1116A, AC power supply, electronic load and
multimeter according to Figure 2-1.
2.
Turn on the AC power supply and set its voltage to 220 V.
Note: the value set in this step should be accordance with the value selected by
the voltage selector in the rear panel of DP1116A.
3.
Turn on DP1116A. Press 16V/10A at the front panel to set the scale to be
tested to 16V/10A. Set the voltage and current of the scale to be tested
according to Table 2-1. Press On/Off to enable the output of the power supply.
4.
Turn on the electronic load. Adjust the current of the electronic load to 0 A or do
not connect any load device (no load).
5.
Turn on the digital multimeter and select DC voltage measurement function.
Make sure that the power supply is in CV mode. Read and record the current
reading (U
0
) of the multimeter.
6.
Adjust the electronic load to make the load current equal the rated output
current of the scale under test. Make sure that the power supply is in CV mode
and record the reading (U
1
) of the multimeter.
7.
Calculate the voltage variation (namely the CV load effect, |U
1
- U
0
|) and
campare it with the specification.
8.
Turn off the output of the power supply. Press 32V/5A at the front panel and
set the voltage and current of the scale to be tested according to Table 2-1.
Press On/Off to enable the output of the power supply.
9.
Repeat steps 4 to 7 to test the CV load regulation rate at 32V/5A scale.