Figure 5.
Current Load Connection Diagram
45
NI-DCPower Device
Sense –
Sense +
+
–
DMM2
Voltage
Mode
DMM1
Voltage
Mode
+
–
+
–
Precision
Shunt
Ensure cable
resistance
<0.1 Ohm
Electronic Load
Constant Voltage
Mode
Remote Sense
Mode
Sense +
Sense –
+
–
2.
Connect the DMM to the NI 4113 connector pins with dedicated pairs of wires to avoid
including lead drop in the DMM measurement.
3.
Set the
niDCPower Output Function
property or
NIDCPOWER_OUTPUT_FUNCTION
attribute to DC Current for the NI 4113.
Verifying Current Load Regulation
Use the NI 4113 in constant current mode to confirm the output current change falls within
calculated limits while varying the load voltage.
Run this test only after successfully verifying current output and measurement.
Refer to the following table as you complete the following steps.
Table 7.
Current Load Regulation Verification
Level Range
Limit Range and Limit
Test Point
Load
1
Load
2
6 A
10 V
6 A
1 V
8.5 V
1.
Set the programmable electronic load to the first specified value (
Load1
).
2.
Set the first specified level range, limit range, and limit on the NI 4113.
3.
Set the level on the NI 4113 to the first specified test point.
4.
Take a voltage measurement across the output terminals of the NI 4113 using
DMM1
.
5.
Record the voltage from the previous step as
V1
.
4
Configure the electronic load for remote sense mode, and ensure that cables not corrected by
remote sense have a total resistance of <0.1 Ω.
5
If you make measurements using only one DMM, sequentially set up the DMM connections as
specified by the procedure steps.
NI PXIe-4113 Calibration Procedure
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© National Instruments
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