©
National Instruments Corporation
5
Calibrating FieldPoint AI Modules with Calibration Executive
Test Conditions
Follow these guidelines to optimize connections and test conditions during
calibration:
•
Keep connections to the module short. Long cables and wires act as
antennae, picking up extra noise that can affect measurements.
•
Use shielded copper wire for all cable connections to the device.
Use twisted-pair wire to eliminate noise and thermal offsets.
•
Maintain a temperature between 18 and 28 °C. To operate the module
at a specific temperature outside this range, calibrate the module at that
temperature.
•
Keep relative humidity below 80%.
•
Allow a warm-up time of at least 15 minutes to ensure that the
measurement circuitry is at a stable operating temperature.
Calibration Procedures
This section explains how to configure and set up the module for
calibration, and how to run the Calibration Executive procedure. Refer
to Table 3 for the approximate times to complete the procedure in both
automated and manual modes.
Note
For an explanation of automated versus manual calibration, refer to the
Automated
Versus Manual Calibration
section in Chapter 2,
Calibration Executive System Overview
,
of the
Calibration Executive Software User Manual.
Table 3.
Approximate Time to Complete Calibration Executive Procedure
Module
Automated Mode
Manual Mode
FP-TC-120
10 minutes
15 minutes
FP-AI-100
70 minutes
120 minutes
FP-AI-110
20 minutes
30 minutes
FP-AI-111
30 minutes
45 minutes
FP-RTD-122
10 minutes
15 minutes
