NI 9234 Calibration Procedure
|
© National Instruments
|
5
Verification
The following performance verification procedures describe the sequence of operation and test
points required to verify the NI 9234 and assumes that adequate traceable uncertainties are
available for the calibration references.
Accuracy Verification
Complete the following procedure to determine the As-Found status of the NI 9234.
1.
Set the calibrator to Standby mode (STBY).
2.
Connect the NI 9234 to the calibrator as shown in Figure 1.
Figure 1.
Accuracy Verification Connections to the NI 9234
3.
Verify that the calibrator output is not grounded (floating).
Notes
The analog inputs on the NI 9234 are grounded, so the calibrator must be
not grounded (floating) to prevent ground loop measurement errors.
To float the output of the Fluke 5700A, enable External Guard mode (EX GRD).
4.
Set the calibrator voltage to a Test Point value indicated in Table 4.
5.
Set the calibrator to Operate mode (OPR).
6.
Acquire and average samples.
a.
Create an AI voltage task on the NI 9234 according to Table 2.
b.
Configure the AI voltage task timing according to Table 3.
c.
Start the task.
Table 2.
NI 9234 Configuration for Accuracy Verification
Min (V)
Max (V)
Scaled Units
Channel Configuration
-5
5
Volts
DC Coupled
Table 3.
NI 9234 Timing Configuration
Sample Mode
Samples Per Channel
Rate (kHz)
Finite Samples
10240
10.24
NI 92
3
4
C
a
li
b
r
a
tor
+
AI
x
HI
LO
–
Summary of Contents for NI 9234
Page 1: ...NI 9234...