Advantech PCI-1720 Bedienungsanleitung PDF herunterladen (Seite 36)

32 PCI-1713 User's Manual

5.1 Introduction

Regular calibration checks are important to maintain accuracy in data

acquisition and control applications. To assist users in the A/D

calibration process, we provide one calibration program, ADCAL.EXE,

on the PCI-1713 software CD-ROM.

The ADCAL.EXE program makes A/D calibrations easy. It leads you

through the calibration and setup procedure with a variety of prompts

and graphic displays, showing you all of the correct settings and

adjustments. This chapter offers a brief guide to these calibration

programs.

To perform a satisfactory calibration, you need a 4

-digit digital

multimeter and a voltage calibrator or a stable, noise free D. C. voltage

source.

5.2 VR Assignment

There are four variable resistors (VRs) on the PCL-1713 card. They

help you to make accurate adjustments on all A/D channels. Please

refer to the following figure for VR positions.

VR3VR2VR1VR4

CN1

PCI-1713 REV.A1 01-6

TP1

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Advantech PCI-1720 Bedienungsanleitung Seite 36