4.
Install the module in slot 8 of the NI cDAQ-9178 chassis. Leave slots 1 through 7 of the
NI cDAQ-9178 chassis empty.
5.
Connect the NI cDAQ-9178 chassis to your host computer.
6.
Connect the power source to the NI cDAQ-9178 chassis.
7.
Launch Measurement & Automation Explorer (MAX).
8.
Right-click the device name and select
Self-Test
to ensure that the module is working
properly.
Verification
The following performance verification procedure describes the sequence of operation and
provides test points required to verify the NI 9251 with mini XLR. The verification procedure
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 9251 with
mini XLR.
1.
Set the calibrator to Standby mode (STBY).
2.
Connect the NI 9251 with mini XLR to the calibrator as shown in the following figure.
Figure 1. Analog Input Verification Connections
NI 9251
Calibrator
AI0–
AI0+
Chassis GND
HI
LO
AI1+
AI1–
Note
The chassis ground lug connection to ground is the
NI 9251 with mini XLR ground connection.
3.
Set the calibrator voltage to a Test Point value indicated in the
NI 9251 with mini XLR
Verification Test Limits
table.
4.
Set the calibrator to Operate mode (OPR).
5.
Acquire and average samples for each channel.
a)
Create and configure an AI voltage task according to the following
NI 9251 with mini XLR AI Voltage Task Configuration
table.
Table 2. NI 9251 with mini XLR AI Voltage Task Configuration
Minimum (V) Maximum (V) Scaled Units Physical Channels Channel Configuration
-4.243
4.243
Volts
AI0:1
DC Coupled
4
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NI 9251 Calibration Procedure