APG DCR-1006A user manual - Manual (Page 18)

DCR-1006A Ultrasonic Controller Rev. A1, 2/14
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MAXdIS (Maximum Distance):
Sets the distance (beginning at the sensor face) to the point where the sensor
will stop looking for target echoes. Targets detected beyond the Maximum
Distance will be ignored.
WINdOW (Filter Window):
Sets the width of the target acceptance window. The target acceptance win-
dow is a zone, centered around the current target reading, within which any
target detected will be considered legitimate and figured into the Averaging
buffer. Any target detected outside of the Window will be considered “out of
range” and will be ignored based on the setting in the Out of Range Samples
parameter (see below). The Filter Window extends both directions from the
target reading. For example, if the sensor is detecting a target at 5 ft. and the
Filter Window is set at 1 ft., then any target detected between 4 ft. and 6 ft. will
be accepted.
OUTRAN (Out of Range Samples):
Determines the number of consecutive target readings that fall outside of the
Filter Window before the “out of range” target is recognized as legitimate and
figured into the averaging buffer. For example, suppose the Out Of Range Sam-
ples is set to 10. If a target is suddenly detected outside of the Filter Window, it
will be ignored until it has been detected for 10 consecutive samples, at which
point it will be qualified as a legitimate target. If the “out of range” target was
detected for only 9 consecutive samples before moving out of the sensing area,
then it wouldn’t be acknowledged as a target and the reading would stay with
the last qualified target sample.
SAMP R (Sample Rate):
Sets the interval between target readings. Options allow rates from 100 mS to
1000 mS (once per second). 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 detecting errant echoes. It is highly
recommended that the Sample Rate be set only as fast as is necessary for the
application. A sample rate of 500 to 1000 mS is usually appropriate for slow
moving tank level appications.