Rigol DP1308A

Chapter 2 Constant Voltage Tests RIGOL
DP1308A Performance Verification Manual
2-5
CV Linear Adjustment Rate (CV Source Effect)
CV linear adjustment rate is used to measure the variation of output voltage of the
power supply due to source effect under constant voltage (CV).
1. Turn off DP1308A. Connect DP1308A, AC source, electronic load and multimeter
according to Figure 2-1. Note that the measurement probe or clip of the
multimeter must be connected to A in Figure 2-2.
2. Turn on the AC source and set its voltage to the AC line voltage.
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 2-3. Press On/Off under the channel to be tested to enable
power output.
4. Turn on the electronic load and set the electronic load for the output channel’s
rated current.
5. Turn on the multimeter and select DCV measurement function. The output status
of the power supply should be CV. Read and record the current reading U
0
on the
multimeter.
6. Adjust the AC source to undervoltage state (namely 10% drop in amplitude, refer
to Table 2-1). The output status of the power supply should be CV. Read and
record the current reading U
1
on the multimeter.
7. Adjust the AC source to overvoltage state (namely 10% rise in amplitude, refer to
Table 2-1). The output status of the power supply should be CV. Read and record
the current reading U
2
on the multimeter.
8. Calculate
%100
||
0
01
×
−−
U
UUU
offset
and
%100
||
0
02
×
−−
U
UUU
offset
respectively to
get the measurement results of load adjustment rate. Wherein,
offset
U
(about
2mV) is the offset caused by error.