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NI 9219 Calibration Procedure
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© National Instruments Corporation
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35
e.
Call and configure the NI 9219 setup calibration function, to place the channel in
voltage mode, according to Table 38.
f.
Configure the DMM for a resistance measurement.
g.
Enable Auto Zero on the DMM.
h.
Acquire a resistance reading with the DMM.
i.
DIsconnect the DMM from the resistors in the NI 9219.
j.
Call and configure the NI 9219 setup calibration function according to Table 41.
k.
Call and configure the NI 9219 adjustment function according to Table 37.
l.
Repeat steps e through k for every value in the array.
m. Close the calibration session.
3.
Disconnect the DMM and the resistor from the device.
4.
Repeat steps 1 through 3 for each channel on the NI 9219.
Half-Bridge Accuracy Adjustment
Complete the following steps to adjust the half-bridge accuracy of the NI 9219.
1.
Connect the NI 9219 to DMM1 as shown in Figure 10.
2.
Adjust the NI 9219 Half-Bridge accuracy.
a.
Initialize a calibration session on the NI 9219. The default password is
NI
.
b.
Call and configure the NI 9219 setup calibration function, to place the channel in RTD
mode, according to Table 41.
Table 46.
Setup Configuration for RTD Accuracy Adjustment (Configuration 2)
Min (V)
Max (V)
Physical
Channels
Measurement
Type
Bridge
Configuration
-1
1
cDAQMod8/ai
x
Voltage
No Bridge
Table 47.
Setup Configuration for RTD Accuracy Adjustment (Configuration 3)
Min (
Ω
)
Max (
Ω
)
Physical
Channels
Measurement
Type
Bridge
Configuration
1050
10500
cDAQMod8/ai
x
Resistance
No Bridge
Table 48.
Adjustment Configuration
Physical Channel
Reference Value
cDAQMod8/ai
x
The DMM reading