Chapter 3 Constant Current Tests
RIGOL
DP1308A Performance Verification Manual
3-3
CC Load Adjustment Rate (CC Load Effect)
CC load adjustment rate, a static specification, is used to test the output current
variation of the power supply caused by load effect under constant current (CC).
1.
Turn off DP1308A. Connect DP1308A, AC source, current monitoring resistor,
electronic load and multimeter according to Figure 3-1. Note that 0.1Ω 4-wire
current monitoring resistor should be used and the multimeter should be
connected to the voltage measurement terminal of the current monitoring
resistor (as shown in the figure below, C represents the current measurement
terminals and S represents the voltage measurement terminals).
S S
Figure 3-2 4-wire Current Monitoring Resistor
2.
Turn on the AC source and set its voltage to the AC line voltage. Set the
electronic load to short-circuit mode and the output status of the power supply
channel under test should be CC.
3.
Turn on DP1308A and press +6V, +25V or -25V at the front panel to select the
channel to be tested. Set the voltage and current of the channel to be tested
according to Table 3-1. Press On/Off under the channel to be tested to enable
power output.
4.
Turn on the multimeter and select DCV measurement function. The output status
of the power supply should be CC. Read the reading U
0
(namely the voltage of
the current monitoring resistor) on the multimeter and calculate the short-circuit
current U
0
/R.
5.
Set the electronic load to CV mode and adjsut its voltage to approximately the
rated output voltage of the channel under test. At this point, the output status of
C
C
