Chapter 2 Constant Voltage Test
RIGOL
DP1116A Performance Verification Manual
2-9
B. Correct Connection
Figure 2-2 Peak-peak Value Measurement Connections
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 of the scale to be tested to the rated output
value and the current to the maximum output value by referring to Table 2-3.
Press On/Off to enable the output of the power supply.
4.
Set the oscilloscope: set the timebase to 5 ms/div, the vertical scale to 2 mV, the
sample mode to peak detect, the coupling mode to AC and the input impedance
to 1 MΩ; turn on the 20 MHz bandwidth limit. Enable the peak-peak value
measurement function of the oscilloscope. Make sure that the power supply is in
CV mode. Read and record the peak-peak value (Vpp) measured by the
oscilloscope.
5.
Disconnect the oscilloscope and connect the RMS voltmeter according to Figure
2-1. Note that the measurement wires of the voltmeter should be twisted
together to minimize the effect of the space radiation noise on the test. Make
sure that the power supply is in CV mode. Read and record the Vrms measured.
6.
Press 32V/5A at the front panel and repeat steps 1 to 5 to test the ripple and
noise at 32V/5A scale.
Test Record Form:
Table 2-3 CV Ripple and Noise Test Record Form
Scale
16V/10A
32V/5A
Specification
< 350 μV rms/3 mVpp
DP1116A Setting
Volt (V)
16
32
Current (A)
10.5
5.25
Measurement
Value
Vpp
Vrms
Power Supply under Test
Oscilloscope
Vertical Input
Twisted Pair
Break
GND Path
