NI 9219 Calibration Procedure
8
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10. Set the source output to zero and clear the acquisition.
11. Repeat steps 2 through 10 for all test points and all channels on the NI 9219. NI recommends that
you verify the values for all the iterations listed in Table 5 for each channel, but you can save time
by verifying only the ranges, values, and channels used in your application.
12. Disconnect the source and the DMM from the device.
Thermocouple Accuracy Verification
Complete the following steps to verify the thermocouple accuracy of an NI 9219.
1.
Connect the NI 9219 to the DMM and source as shown in Figure 3.
Figure 3.
Thermocouple Accuracy Verification Connections to the NI 9219
–1
1
Max
0.80
–0.000260
0.000260
Mid
0.00
–0.000014
0.000014
Min
–0.80
–0.000260
0.000260
–0.125
0.125
Max
0.10
–0.000041
0.000041
Mid
0.00
–0.000010
0.000010
Min
–0.10
–0.000041
0.000041
Table 5.
NI 9219 Verification Test Limits for Voltage Accuracy (Continued)
Range
Test Point
1
–
Year Limits
Minimum
(V)
Maximum
(V)
Location
Value (V)
Lower Limit
(V)
Upper Limit
(V)
V+
V–
HI
V
LO
NI 9219
DMM
Source
HI (4)
LO (5)
Ch 0
HI (4)
LO (5)
Ch 1
HI (4)
LO (5)
Ch 2
HI (4)
LO (5)
Ch 3
