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Test Conditions
The following setup and environmental conditions are required to ensure the NI 9269 meets
published specifications.
•
Keep connections to the NI 9269 as short as possible. Long cables and wires act as
antennae, picking up extra noise that can affect measurements.
•
Verify that all connections to the NI 9269 are secure.
•
Use shielded copper wire for all cable connections to the NI 9269. Use twisted-pair wire to
eliminate noise and thermal offsets.
•
Maintain an ambient temperature of 23 °C ± 5 °C. The NI 9269 temperature will be greater
than the ambient temperature.
•
Keep relative humidity below 80%.
•
Allow a warm-up time of at least 10 minutes to ensure that the NI 9269 measurement
circuitry is at a stable operating temperature.
Initial Setup
Complete the following steps to set up the NI 9269.
1.
Install NI-DAQmx.
2.
Make sure that the NI cDAQ-9178 power source is not connected.
3.
Insert the module into slot 8 of the NI cDAQ-9178 chassis. Leave slots 1 through 7 of the
NI cDAQ-9178 chassis empty.
4.
Connect the NI cDAQ-9178 chassis to your host computer.
5.
Connect the power source to the NI cDAQ-9178 chassis.
6.
Launch Measurement & Automation Explorer (MAX).
7.
Right-click the device name and select Self-Test to ensure that the device is working
properly.
Verification
The following performance verification procedure describes the sequence of operation and test
points required to verify the NI 9269 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 9269.
1.
Set the DMM to Standby mode (STBY).
2.
Connect the DMM to the NI 9269 as shown in Figure 1.
NI 9269 Calibration Procedure | © National Instruments | 3
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