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D-09116 Chemnitz, Germany

Date: 20.04.04

Page 6 of 30

Title:

Data Sheet GC-IP200

Name of Document:

43500-DB-2-1-E-IP200.pdf

2.3

Reference Signals / Index Point

A third output of the measuring system - typically called reference, index point or zero point signal -

considered to be activated, if the difference of the signals at the REFP and REFN pins becomes greater than

REFN

REFP

respectively:

VRP = REFP - REFN

0V

inactive

active

inactive

Figure 3

= -6mV

= +6mV

Hysteresis (typical)

= 12mV



If a sensor without reference signals is used, defined levels on pins REFP and REFN are necessary to

setting the index point always active or always inactive, respectively.