National Instruments VirtualBench Calibration Procedure

NI VirtualBench Calibration Procedure | © National Instruments | 25
Adjusting AC and DC Current
To adjust the AC and DC current functions of the VirtualBench, complete the following steps:
1. Reset the calibrator.
2. To adjust current ranges <1 A, connect the connectors on one end of the low EMF copper
cable to the VirtualBench mA and LO banana plug connectors, and connect the connectors
on the other end of the cable to the HI and LO calibrator binding posts. Figure 11 shows the
correct connections.
Figure 11. Cable Connections for Current Ranges <1 A
3. Wait 2 minutes for the thermal EMF to stabilize.
4. Call DMM Initialize Calibration with the following parameter:
• Password =
NI (default)
5.
Call DMM Get Current Calibration Adjustment Points. This will return two
arrays:
• Range—A numerical array specifying the range being calibrated
• Adjustment Point—A numerical array specifying the current required to perform the
adjustment
6. Output the adjustment point on the calibrator.
7. Call
DMM Adjust Current Calibration with the following parameters:
• Range—Supplied from the output of DMM Get Current Calibration Adjustment
Points
• Adjustment Point—Supplied from the output of DMM Get Current Calibration
Adjustment Points
8. Repeat steps 6 through 7 for the first six adjustment points.
1 VirtualBench DMM 2 Multifunction Calibrator 3 Low EMF Copper Cable
HI
LO
HI
LO
HVI
SENSE
VΩ
OUTPUT
VΩA
AUX
CURRENT
GUARD GROUND
1 2
3

National Instruments VirtualBench Specifications

General

Brand	National Instruments
Model	VirtualBench
Category	Industrial Electrical
Language	English