Model 2281S-20-6 DC Power Supply and Battery Simulator Reference Manual
Appendix B: Verification
077114601 / March 2019
B-27
Check sink current capability
Equipment required
AC power source
High current 18 AWG wire
Electronic load
High accuracy 0.05 Ω resistor
DC voltmeter
Current shunt resistor cabling
DC source
Programmable DC power source, low noise, can
work at constant current mode, output capability
higher than 20 V and 1.5 A
Set up the equipment as shown in the following figure.
Make sure the warm-up criteria have been met, as described in Performance verification conditions.
Figure 139: Sink current capability test setup
To check sink current capability:
1. Set the voltmeter as follows:
Set to measure DC volts.
Set the current range to autorange.
Calculate the amperes (instead of volt) by multiplying the voltmeter reading result by 20 (1/R
Shunt
).
2. Check the current readback accuracy on 1 A range.
3. Set the DUT output voltage to 0 V.
4. Set the output voltage of the DC source to 20 V, set the DC source current to 1.5 A.
5. Turn the DUT output on, warm up for 1 minute.
6. Enter the voltmeter reading in the table
(on page B-7).
