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NI 9218 Calibration Procedure
j.
Use the DAQmx Close External Calibration to close and commit the calibration
session.
k.
Repeat steps c through j for each channel.
5.
Disconnect the NI 9218 from the calibrator.
Voltage Accuracy Adjustment, 60 V mode
Complete the following procedure to adjust the accuracy performance of the NI 9218.
1.
You must complete the
Voltage Accuracy Adjustment, 16 V mode
section before starting
this section.
2.
Connect the NI 9218 to the DMM as shown in Figure 9.
3.
Configure the NI 9218 for the NI 9982 measurement adapters using MAX.
Figure 9.
Voltage Accuracy Adjustment Connections
4.
Adjust the NI 9218.
a.
Initialize a calibration session on the NI 9218. The default password is
NI
.
b.
Input the external temperature in degrees Celsius using the DAQmx Set Temperature
C Series Calibration function.
c.
Call and configure the DAQmx Setup 9218 Calibration function according to
Table 22.
d.
Set the DMM to the most appropriate range for 390 k
Ω
resistance measurement.
e.
Measure the resistance.
f.
Call and configure the DAQmx Adjust 9218 Calibration function according to
Table 23.
Table 22.
Setup Configuration for 60 V Accuracy Adjustment
Min (V)
Max (V)
Physical Channels
Measurement Type
-60
60
cDAQMod8/AI
x
Voltage
Table 23.
Adjustment Configuration
Physical Channel
Reference Value
cDAQMod8/AI
x
The reading from the DMM
AI+
AI
–
NI 99
8
2
NI 921
8
D
S
UB/LEMO
DMM
LO
HI
CH
x
