HW 6 - Paper on photoelectrics

HW 6 - Paper on photoelectrics - MFET 474 Manufacturing...

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MFET 474, Homework page 1 of 2 MFET 474 Manufacturing Integration II Homework #6 Fall 2009 Name (Last, First) _______________________________________________________________ All of the following questions are based on Allen-Bradley’s Photoswitch Photoelectric Sensors documentation previously handed out in class. 1) (True or false) With respect to photoelectric sensors, lenses are used with both light sources (LEDs) and light detectors (photodetectors) and generally increase the sensing distance of the photoelectric sensor. ____ 2) (True or false) With respect to photoelectric sensors, a margin of zero is obtained when just enough light is detected (by the receiver) to switch the state of the output device from off-to-on (or on-to-off). ____ 3) (True or false) With respect to photoelectric sensors, the diffuse sensing mode is generally the best sensing mode when operating in very dusty or dirty industrial environments. ____ 4) Which sensing mode generally provides the longest sensing distances?
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This note was uploaded on 02/29/2012 for the course MFET 474 taught by Professor Kostek,t during the Fall '08 term at Purdue.

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HW 6 - Paper on photoelectrics - MFET 474 Manufacturing...

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