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NI 9209 Calibration Procedure
Single-Ended Voltage Accuracy Verification
Complete the following procedure to determine the As-Found status of the NI 9209.
1.
Set the calibrator to Standby mode (STBY).
2.
Connect the NI 9209 to the calibrator as shown in Figure 2.
Figure 2.
Single-Ended Voltage Accuracy Connections
Note
If the calibrator outputs are truly floating, connect the negative output to a
quiet earth ground as well as COM to give the entire system a ground reference.
3.
Set the calibrator voltage to a Test Point value indicated in Table 6.
4.
Set the calibrator to Operate mode (OPR).
5.
Acquire and average samples.
a.
Create and configure an AI voltage task on the NI 9209 according to Table 5.
b.
Configure the AI voltage task according to Table 3 on page 5. Set the ADC timing
mode to high-resolution.
c.
Start the task.
d.
Average the readings.
e.
Clear the task.
1
Connections when using a calibrator with a guard connection.
2
Connections when using a calibrator with no guard connection.
Table 5.
NI 9209 Configuration for Voltage Accuracy Verification
Input Range
Scaled Units
Terminal Configuration
Min
Max
-10
10
Volts
Single-Ended/RSE
NI 9209
C
a
li
b
r
a
tor
COM
AI
x
HI
LO
G
ua
rd
NI 9209
C
a
li
b
r
a
tor
COM
AI
x
HI
LO
1
2
