National Instruments NI PXIe-4112 User Manual

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 Voltage for the NI 4113.
Verifying Voltage Load Regulation
Use the NI 4113 in constant voltage mode to confirm the output voltage change falls within
calculated limits while varying the load current.
Run this test only after successfully verifying voltage output and measurement.
Refer to the following table as you complete the following steps.
Table 6. Voltage Load Regulation Verification
Level Range Limit Range and Limit Test Point Load
1
Load
2
10 V 6 A 10 V 0.6 A 5.4 A
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.
6. Calculate the current through the shunt by completing the following steps.
a) Take a voltage measurement across the shunt using DMM2.
b) Divide the voltage measurement by the calibrated value of the shunt.
7. Record the current from the previous step as I1.
8. Change the load from Load1 to Load2. Repeat the previous four steps. This time, record
the values as V2 and I2.
9. Calculate the upper and lower voltage load regulation test limits using the following
formula, and then record the test limits.
Voltage Load Regulation Test Limit = ± (I1 - I2) × 0.0005 V/A
10. Calculate the voltage change using the following formula, and record the value.
V1 - V2.
11. Verify the voltage change falls within the voltage load regulation test limits.
12. If more than one level range is specified, repeat the previous steps using the values
specified in each level range.
Connecting and Configuring Equipment for Current Load
Verification
1. Make the necessary connections for this procedure, as shown in the following figure.
10 | ni.com | NI PXIe-4113 Calibration Procedure

National Instruments NI PXIe-4112 Specifications

General

Brand	National Instruments
Model	NI PXIe-4112
Category	Power Supply
Language	English