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Unformatted text preview: he optical signal capacity reaches the receiver. In
this case, an operating margin factor of β >10 is required.
In the absence of manufacturer's specifications, the operating margin can be tested
by means of simulating contaminated conditions.
A flashing indicator on the proximity sensor is useful for checking the operating
margin. This is actuated if the sensor falls below the minimum operating margin.
Designs are available, which start to flash if the operating margin factor of β = 1.5 is
reached, thereby signalling that 50 % operating margin is still available.
A flashing indicator can also be used as a setting aid during the assembly and
adjustment of a proximity sensor layout and at the same time serve as an indicator
of contamination during the subsequent operational process if the operating margin
gradually reduces. 76 © Festo Didactic GmbH & Co. KG • FP 1110 6. Optical proximity sensors A different type of contamination indicator operates dynamically by checking with
each actuation of the proximity sensor whethe...
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This note was uploaded on 11/01/2012 for the course CHEMICAL 102 taught by Professor Jamesrodriguez during the Spring '12 term at Universidad Politécnica de Cartagena.
- Spring '12