APG MNU Slave Sensor user manual - Manual (Page 30)

MNU Series Ultrasonic Sensors Rev. B1, 5/13
30
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Sensi! vity (0 to 100%) (40408)
Controls the level of amplifi ca" on applied the returning target echoes (signals).
The sensi" vity se#
ng is expressed as a percentage; 0 to 100%. When operat-
ing in Autosense mode, the Sensi" vity se# ng acts as an upper limit constraint
(refer to Gain Control below for more informa" on on Autosense).
Pulses (0 to 20) (40409)
Controls the number of sound wave pulses being sent in each ultrasonic
burst. The greater the number of pulses, the stronger the transmi$ ed signal.
When opera" ng in Autosense mode, the Pulses se#
ng acts as an upper limit
constraint (refer to Gain Control below for more informa" on on Autosense).
Blanking (0 to 10364 mm) (40410 )
Sets the distance, beginning at the sensor face, to the point where the sensor
will begin looking for target signals. All targets closer than the blanking distance
will be ignored. The blanking should never be set to less than the minimum
range specifi ca" on of the sensor. If the target enters the blanking area, errant
readings will occur.
Gain Control (0 = Manual Mode; 1 = Autosense Mode) (40411)
Determines how the sensor applies gain (amplifi ca" on) to returning target
echoes. In Manual mode the Sensi" vity and Pules se#
ngs are applied as
a sta" c values. In Autosense Mode, the sensor self-adjusts the Pulses and
Sensi" vity levels (within the bounds of their respec" ve se#
ngs) in order to
op" mize the signal level.
Averaging (1 to 20) (40412)
Defi nes the number of readings that will be averaged together to become
the Calculated Value. Each qualifi ed reading (see Filter Window and Out of
Range Samples on next page) is placed into a fi rst-in, fi rst-out (FIFO) buff er
and averaged with previous readings. A higher Averaging se#
ng will result in
smoother readings, but will also slow the response to rapid target changes.