5.
Connect the cDAQ-9178 chassis to your host computer.
6.
Connect the power source to the 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 9202. 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 9202.
1.
Set the calibrator to Standby mode (STBY).
2.
Connect the NI 9202 to the calibrator as shown in the following figure.
Figure 1. Analog Input Verification Connections
NI 9202
Calibrator
AIx–
AIx+
COM
HI
LO
Guard
NI 9202
Calibrator
AIx–
AIx+
COM
HI
LO
1
2
1. Connections when using a calibrator with a guard connection.
2. Connections when using a calibrator with no guard connection.
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 the
NI 9202 Verification Test
Limits
table.
4.
Set the calibrator to Operate mode (OPR).
5.
Acquire and average samples.
a)
Create and configure an AI voltage channel according to the following
NI 9202 AI
Voltage Task
table.
Table 2. NI 9202 AI Voltage Task
Physical Channels
Range
Terminal Configuration
cDAQMod8/AI0:15
±10 V
Differential
b)
Configure the AI voltage channel timing according to the following
NI 9202 Task
Timing
table.
4
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NI 9202 Calibration Procedure
