Measurement-computing IOtech 640 Series Manuel d'utilisateur télécharger pdf (Page 44)

6-2 Analog Signals 878893 640 & 650 Series

Features of the dynamic signal conditioning circuit:

o current source for transducer biasing (IEPE)

o detection of a transducer fault

o AC or DC coupling

o ±10 V range (IOtech 640 models)

o ±40 V range (IOtech 650 models)

o anti-aliasing filters: 3-pole low pass filter in hardware;

programmable digital filtering via software

o pseudo-differential inputs

o support for TEDS (Transducer Electronic Data Sheet), requires eZ-Analyst

o any analog input channel can serve as a tach input

o channel-to-channel phase matching

Signal parameters are independently controlled in software on a per channel basis.

For 640e and 640u, the conditioning circuit includes a built-in programmable voltage excitation source.

This source can be used to stimulate dynamic systems for transfer function measurements or serve as a test

signal for the input channels.

IOtech 640 and 650 Series Block Diagram

Comments pertaining to the diagram are included in Chapter 2.

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Measurement-computing IOtech 640 Series Manuel d'utilisateur Page 44