National Instruments VirtualBench - Setting up the Test Equipment; Adjusting DC Voltage

NI VirtualBench Calibration Procedure | © National Instruments | 21
Setting Up the Test Equipment
If you have not already set up the test equipment, complete the following steps:
1. Remove all connections from the input banana plug connectors on the VirtualBench.
2. Verify that the calibrator has been calibrated within the time limits specified in Table 3, and
that DC zeros calibration has been performed within the last 30 days. Consult the Fluke user
documentation for instructions on calibrating these devices.
Note Ensure that the calibrator is warmed up for at least 60 minutes before you
begin this procedure.
3. Reset the calibrator.
4. If you have not already done so, allow the VirtualBench to warm up for 30 minutes.
Adjusting DC Voltage
To adjust the DC voltage function of the VirtualBench, complete the following steps:
1. Reset the calibrator.
2. 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 8 shows the correct connections.
Figure 8. Cable Connections for DC Voltage
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 DC Voltage Calibration Adjustment Points. This will return
two arrays:
• Range—A numerical array specifying the range being calibrated
• Adjustment Point—A numerical array specifying the DC voltage required to perform
the adjustment
6. Output the adjustment point on the calibrator.
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