Advantech PCI-1710HGU Manuel d'utilisateur télécharger pdf (Page 48)

PCI-1710U Series User Manual 42

C.2 A/D Calibration

Regular and accurate calibration ensures maximum possible accuracy.

The A/D calibration tool in the Advantech Device Manager leads you

through the whole A/D offset and gain adjustment procedure. The basic

steps are outlined below:

1. In the Advantech Device Manager, set analog input channel AI0 as

single-ended, bipolar, range ±5 V, and set AI1 as single-ended, uni-

polar, range 0 to 10 V.

2. Connect a DC voltage source with value equal to 0.5 LSB (-4.9959

V) to AI0. Adjust VR2 until the output from the card's AI0 flickers

between 0 and 1.

Note: Using a precision voltmeter to calibrate the

A/D outputs is recommended.

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Advantech PCI-1710HGU Manuel d'utilisateur Page 48