NI-DAQmx C Reference Help
Reference information for NI-DAQmx C functions and NI-DAQmx C properties
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Reference information for NI-DAQmx .NET methods and NI-DAQmx .NET
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Test Equipment
NI recommends that you use equipment in the following table for calibrating the NI 9266. If
the recommended equipment is not available, select a substitute from the requirements
column.
Equipment Recommended
Model
Requirements
DMM NI 4070 DMM Use a multi-ranging 6 1/2 digit DMM with a
DC current measurement accuracy of
400 ppm.
Chassis cDAQ-9178 —
Bench-Top Power
Supply
— 9 V DC to 30 V DC output voltage with an
output rated for at least 5 W.
Test Conditions
The following setup and environmental conditions are required to ensure the NI 9266 meets
calibration specifications.
• Keep connections to the NI 9266 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 NI 9266 are secure.
• Use shielded copper wire for all cable connections to the NI 9266. Use twisted-pairs wire
to eliminate noise and thermal offsets.
• Maintain an ambient temperature of 23 °C ± 5 °C. The NI 9266 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 9266 measurement
circuitry is at a stable operating temperature.
2 | ni.com | NI 9266 Calibration Procedure
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