NI 9219 Calibration Procedure
4
ni.com
Test Conditions
The following setup and environmental conditions are required to ensure the NI 9219
meets published
specifications.
•
Keep connections to the device 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 device are secure.
•
Use shielded copper wire for all cable connections to the device. Use twisted-pairs wire to
eliminate noise and thermal offsets.
•
Maintain an ambient temperature of 23 ±5 °C. The device 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 9219 measurement circuitry is
at a stable operating temperature.
Calibration Procedures
The calibration process includes the following steps:
1.
—Install the device and configure it in Measurement & Automation Explorer (MAX).
2.
—Verify the existing operation of the device. This step confirms whether the device is
operating within the published specifications prior to adjustment.
3.
—Adjust the calibration constants of the device. The adjustment procedure
automatically updates the calibration date and temperature in the EEPROM.
4.
Reverification
—Repeat the verification procedure to ensure that the device is operating within the
published specifications after adjustment.
Initial Setup
Complete the following steps to set up the NI 9219.
1.
Install the NI-DAQmx driver software.
2.
Install the NI 9219 in slot 8 of the NI cDAQ-9178 chassis. Leave slots 1 through 7 of the
NI cDAQ-9178 chassis empty.
3.
Launch Measurement & Automation Explorer (MAX).
4.
Right-click the device name and select
Self-Test
to ensure that the device is working properly.
