RIGOL
Chapter 3 Constant Current Test
DP1116A Performance Verification Manual
3-6
CC Linear Regulation Rate (CC Source Effect)
CC linear regulation rate refers to the variation of output current when the input
power changes while the power supply is in CC mode. In the following section, the
specifications at 16V/10A scale and 32V/5A scale are tested.
Specification:
Linear Regulation Rate, ±(Output PerOffset)
Current
< 0.01% + 250 μA
Test Procedures:
1.
Turn off DP1116A. Connect the power supply, AC power supply, current sampling
resistor, electronic load and multimeter according to Figure 3-1. Set the voltage
selector (100, 115, 220 or 230) at the rear panel of DP1116A according to your
need and make sure that the fuse currently installed matches the input voltage.
As the voltage test methods of the four specifications are the same, 220 is taken
as an example for illustration.
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 3-2. Press On/Off to enable the output of the power supply.
4.
Turn on the electric load. Set the electronic load to CV mode. Adjust its voltage to
make it approximate the rated output voltage of the power supply scale under
test and make sure that the power supply scale under test is still in CC mode.
5.
Turn on the digital multimeter and select the DC voltage measurement function.
Read and record the current reading (U
0
, namely the voltage of the current
sampling resistor) of the multimeter.
6.
Adjust the AC power supply to undervoltgae state (namely the amplitude reduces
by 10%, refer to Table 3-2); read and record the current reading (U
1
) of the
multimeter. Adjust the AC power supply to overvoltage state (namely the
amplitude increases by 10%, refer to Table 3-2); read and record the current
reading (U
2
) of the multimeter.
7.
Calculate the current variations |U
1
- U
0
|/R
M
and |U
2
- U
0
|/R
M
and compare them
with the specification.