Model 2281S-20-6 DC Power Supply and Battery Simulator Reference Manual
Appendix C: Calibration and adjustment
077114601 / March 2019
C-27
Remote high-sink-current calibration
Connect the instrument with the digital multimeter (DMM), precision shunt resistor, and electronic load
(or resistor). For details, see
Current calibration connections
(on page C-8).
Perform the following steps to finish the remote high-sink-current calibration:
Steps 11 and 12: Sink-current calibration on the 1 A and 10 A ranges
You must input the measured value from the DMM. The value should be within the expected range.
A message will indicate if the DMM data entry was out of the expected range. Verify that the proper
shunt value was used or that the cables are properly connected.
For 2281S, the expected values are shown in the following table.
Steps
Maximum voltage
Minimum voltage
11
–5e
-4
V
–1.75e
-2
V
12
–0.01 V
–0.25 V
Make sure that cables, shunts, and loads are properly rated for the intended current. Incorrect
shunt connections can cause damage.
Step 11
1. Before starting this calibration step, configure the shunt and power supply as shown in the
following table.
Model
Shunt
Power supply
2281S
0.05 Ω
Constant current mode
5.0 V
0.06 A
2. Send the command to prepare for step 11:
:CALibration:PROTected:STEP5
3. Send the measured result from the digital multimeter (DMM) and shunt value by sending the
command:
:CALibration:PROTected:STEP5:DATA <voltage>, <resistance>
4. The instrument begins to take internal measurements. This will take a few seconds. To query the
operation status, send the command:
*OPC?
After all of the operations are completed, the instrument returns
1
.
