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NI VirtualBench Calibration Procedure
9.
To adjust current ranges ≥1 A, connect an amplifier to the calibrator, connect the connectors
on one end of the low EMF copper cable to the VirtualBench A and LO banana plug
connectors, and connect the connectors on the other end of the cable to the HI and LO
binding posts on the amplifier. Figure 12 shows the correct connections.
Figure 12.
Cable Connections for Current Ranges
≥
1 A
10. Wait 2 minutes for the thermal EMF to stabilize.
11. Repeat steps 6 through 7 for the last six adjustment points.
12. Call
DMM Close Calibration
with the following parameter:
•
Action Input
=
Commit
.
13. Reset the calibrator for safety reasons.
14. Disconnect all cables from the calibrator and VirtualBench.
You have completed adjusting the current functions of the VirtualBench.
DMM EEPROM Update
When an adjustment procedure for the DMM is completed, the VirtualBench internal calibration
memory (EEPROM) is immediately updated.
If you do not want to perform an adjustment, you can update the calibration date and onboard
calibration temperature without making any adjustments by calling
Cal Set Calibration
Information
.
1
VirtualBench DMM
2
Multifunction Calibrator
3
Low EMF Copper Cable
4
Amplifier
5
Shielded Interface Cable
HI
LO
HI
LO
HVI
S
EN
S
E
V
Ω
OUTPUT
V
Ω
A
AUX
CURRENT
GUARD
GROUND
HI
LO
5
1
2
4
3