Table 2. Recommended Test Equipment
Equipment
Recommended Model
Minimum Requirements
Calibrator
Fluke 5502A
High-precision voltage source with
gain uncertainty of ≤50 ppm and
offset uncertainty of ≤50 μV
SHM125M-Pigtail I/O
Cable (0.3 m, 1 m, 3 m
lengths) (x4)
NI part number
785950-0R3/01/03
—
Banana Plug (optional)
(x2)
—
Use banana plugs with an opening
large enough to accommodate four
22 AWG signal wires
Test Conditions
The following setup and environmental conditions are required to ensure the FD-11603 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 ±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 FieldDAQ device
measurement circuitry is at a stable operating temperature.
Calibration Procedure
The calibration process includes the following steps:
1.
on page 4
2.
3.
on page 7
4.
on page 8
5.
on page 8
FD-11603 Calibration Procedure
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© National Instruments
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