XSAV11801 Rotation detector speed sensor

XSAV11801 Rotation detector

Working principle:
The sensor output a frequency signal to be processed in the comparator, while a vibration frequency originated by the detected running object also enter the comparator. The switch will be off if the vibration frequency is lower than the sensor'  s rated frequency, and the s will be on if the vibration frequency is higher than the sensor'  s rated frequency. SD30-  KA is usually used to detect object with lower speed. When the speed of the object is lower than the rated speed, the sensor output an open signal.
Note: When the power is supplied, it takes around 9 seconds for every kind of speed sensor to enable the detector to keep pace with the detected
machine. In fig. 1 it is detecting the broken link.

Adjustment:
The sensor uses a multi-turn potentiometer to do adjustment, clockwise turning to increase the frequency and counterclockwise turning to decrease the frequency.