Calibration; Introduction; Calibration Theory - Measurement Computing PCI-DAS6034 User Manual

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PCI-DAS6034 & PCI-DAS6035 User's Guide

5.1

We recommend that you calibrate the board (using the InstaCal utility) after the board has

fully warmed up. The recommended warm-up time is 15 minutes. For best results, calibrate

the board immediately before making critical measurements. The high resolution analog

components on the board are somewhat sensitive to temperature. Pre-measurement calibration

insures that your board is operating at optimum calibration values.

5.2

Analog inputs are calibrated for offset and gain. Offset calibration for the analog inputs is

performed directly on the input amplifier with coarse and fine trim DACs acting on the

amplifier.

For input gain calibration, a precision Calibration Reference used in conjunction with coarse

and fine trim DACs acting on the ADC. See Figure 5-1.

Figure 5-1. Analog Input Calibration - Basic Elements

5 Calibration

5–1

Calibration

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