Table 1. Recommended Equipment
Equipment
Recommended Model
Requirements
Calibrator
Fluke 5500A
Use a high-precision voltage source
with a gain error of <57 ppm and an
offset error of <2 mV.
Chassis
cDAQ-9178 (part number
781156-01)
—
DSUB Connection
Accessory
1
NI 9923 (part number
781503-01)
—
Test Conditions
The following setup and environmental conditions are required to ensure the device meets
published specifications.
•
Keep connections to the device as short as possible. Long cables and wires act as
antennas, 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 °C ± 5 °C.
•
Keep relative humidity below 80%.
•
Allow a warm-up time of at least 10 minutes to ensure that the device measurement
circuitry is at a stable operating temperature.
Initial Setup
Complete the following steps to set up the NI 9202.
1.
Install NI-DAQmx.
2.
Make sure that the cDAQ-9178 power source is not connected to the chassis.
3.
Connect the cDAQ-9178 chassis to the system safety ground.
a)
Attach a ring lug to a 14 AWG (1.6 mm) wire.
b)
Connect the ring lug to the ground terminal on the side of the cDAQ-9178 using the
ground screw.
c)
Attach the other end of the wire to the system safety ground.
4.
Install the module in slot 8 of the cDAQ-9178 chassis. Leave slots 1 through 7 of the
cDAQ-9178 chassis empty.
1
For NI 9202 with DSUB variant
NI 9202 Calibration Procedure
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© National Instruments Corporation
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