National Instruments PXI-4110 User Manual

NI PXI-4110 Calibration Procedure | © National Instruments | 15
Voltage Load Regulation
To verify voltage load regulation, use the NI 4110 in constant voltage mode and confirm that the
output voltage change falls within calculated limits while varying the load current using different
resistors. Table 10 lists the resistance values and measurements needed to complete verification.
Refer to Figure 4 for the necessary connections.
Figure 4. Voltage Load Regulation Verification Connection Diagram
Complete the following steps to verify voltage load regulation:
1. For each test, connect the first specified resistance (R
1
) to the specified channel of the
NI 4110.
2. While taking a current measurement with the NI 4110 (I
1
), use the DMM to measure the
voltage across the output of the NI 4110 (V
1
).
3. Change the load from R
1
to R
2
and repeat the previous step.
4. Record the voltage and current measurements for both resistances.
5. Calculate the Voltage Change Limit using the formulas in the following table, where the
current is in mA.
6. Subtract the two voltage measurements V
1
- V
2
to calculate the Voltage Change. The test
passes if the Voltage Change falls within the calculated Voltage Change Limit.
Table 9. NI 4110 Voltage Load Regulation Voltage Change Limit Formulas
Channels Voltage Change Limit
0 ± (I
1
- I
2
) × 2.52 × 10
-5
1 and 2 ± (I
1
- I
2
) × 2.00 × 10
-5
NI PXI-4110
Load
+
–
+
–
HI
LO
DMM
Voltage
Mode
Auxiliary Power
Supply
+
–
AUX IN +
AUX IN –
NI APS-4100

National Instruments PXI-4110 Specifications

General

Brand	National Instruments
Model	PXI-4110
Category	Power Supply
Language	English