user manual Owner's manual

Rev. B1, 5/13 MNU Series Ultrasonic Sensors
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Automa! on Products Group, Inc.
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Filter Window (0 to 10364 mm) (40413)
Sets the width of the target acceptance window. The target acceptance
window is a zone, centered around the current target reading, within which
any target detected will be considered legi! mate and fi gured into the averaging
buff er. Any target detected outside of the Window will be considered “out of
range” and will be ignored based on the se$ ng in the Out of Range Samples
parameter (see below). The Filter Window extends in both direc! ons from the
current target reading. For example, if the sensor is detec! ng a target at 5 % .
and the Filter Window is set at 1 % ., then any target detected between 4 % . and
6 % . will be accepted.
Out of Range Samples (1 to 255) (40414)
Determines the number of consecu! ve target readings that fall outside of the
acceptance window before the “out of range” target is recognized as being
legi! mate and fi gured into the averaging buff er. For example, suppose the
Out Of Range Samples is set to 10. If a target is suddenly detected outside
of the acceptance window, it will be ignored un! l it has been detected for 10
consecu! ve samples, at which point it will be qualifi ed as a legi! mate target. If
the “out of range” target was detected for only 9 consecu! ve samples before
moving out of the sensing area, it would never be acknowledged as a target and
the reading would stay with the last qualifi ed target sample.
Sample Rate (50 to 1000 msec) (40415)
Sets the interval between target readings. Op! ons allow rates from 50 to
1000 msec. A higher Sample Rate will result in a more rapid response to target
movements. Lowering the Sample Rate will help increase sensor lifespan and
decrease the chance of detec! ng errant echoes. It is highly recommended that
the Sample Rate be set only as fast as is necessary for the applica! on. A sample
rate of 500 to 1000 msec. is usually appropriate for slow moving level sensing
applica! ons.