Verification; Accuracy Verification - National Instruments C Series Calibration Procedure

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.
Calibrator
1. Connections when using a calibrator with a guard connection.
2. Connections when using a calibrator with no guard connection.
Note
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.
Physical Channels
cDAQMod8/AI0:15
b) Configure the AI voltage channel timing according to the following NI 9202 Task
Timing table.
4 | ni.com | NI 9202 Calibration Procedure
Figure 1. Analog Input Verification Connections
1
HI AIx+
LO AIx–
Guard COM
NI 9202
If the calibrator outputs are truly floating, connect the negative output to
Table 2. NI 9202 AI Voltage Task
Calibrator
Range
±10 V
2
HI AIx+
LO AIx–
COM
NI 9202
Terminal Configuration
Differential