NI VirtualBench Calibration Procedure | © National Instruments | 23
5. Call DMM Get AC Voltage Calibration Adjustment Points. This will return
three arrays:
• Range—A numerical array specifying the range being calibrated
• Adjustment Point—A numerical array specifying the voltage required to perform the
adjustment
• Frequency—A numerical array specifying the frequency of the calibration signal
6. Output the adjustment point on the calibrator.
7. Call
DMM Adjust AC Voltage Calibration with the following parameters:
• Range—Supplied from the output of DMM Get AC Voltage Calibration Adjustment
Points
• Adjustment Point—Supplied from the output of DMM Get AC Voltage Calibration
Adjustment Points
• Frequency—Supplied from the output of DMM Get AC Voltage Calibration
Adjustment Points
8. Repeat steps 6 through 7 for all adjustment points.
9. Call
DMM Close Calibration with the following parameter:
• Action Input =
Commit
10. Reset the calibrator for safety reasons.
11. Disconnect all cables from the calibrator and VirtualBench.
You have completed adjusting the AC voltage function of the VirtualBench.
Adjusting Resistance
To adjust the resistance function of the VirtualBench, complete the following steps:
1. Reset the calibrator.
2. To adjust resistance ≤19 kΩ, connect the red connectors on one end of the low EMF copper
cable to the banana plug connectors of the VirtualBench, and connect the connectors on the
other end of the cable to the appropriate calibrator binding posts. Figure 10 shows the
correct connections.
Figure 10. Cable Connections for Resistance ≤19 kΩ
1 VirtualBench DMM 2 Multifunction Calibrator 3 Low EMF Copper Cable
HI
LO
HI
LO
HVI
SENSE
VΩ
OUTPUT
VΩA
AUX
CURRENT
GUARD GROUND
3
1 2
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