APG DCU-1100 user manual - Manual (Page 24)

DCU-1104 and DCU-1108 Rev. A2, 11/06
24
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under the sensor. With the correct settings in Modes 7 and 8 the sensor will
ignore the agitator when it passes in front of the sensor and stay locked on the
level of the product in the tank. However, if the agitator stops directly below
the sensor for a long period of time, eventually the number of Out-of-Range
samples in Mode 7 will be exceeded and the sensor could start displaying the
top of the agitator.
To program the DCU-11 for this application, the following modes must be
set:
MODE VALUE DESCRIPTION
1 2 Set units to feet because the output is to be displayed
in feet.
2 0% NOT A SETABLE VALUE. Displays the sensitivity
of the returning echo. 50% or less indicates a good
application.
3 2.00 Do not set closer than the minimum distance
recommended for the DCU-11 sensor.
5 4 Sample once every 4 seconds.
6 15 Average 15 samples in the FIFO buffer.
7 30 Ignore 30 consecutive samples outside the window
set in Mode 8.
8 .5 ft. If the tank has some turbulence between +/-.5 ft.,
the DCU-11 will average these readings in. If a
reading comes back outside the value in Mode 8
(± .5 ft.), the DCU-11 will ignore this reading.
9 120 Loss of echo will show in output after 120 seconds.
10 4 ft. Begin Trip 1 at 4 feet from sensor.
11 18 ft. End trip 1 at 18 feet from sensor.
12 2 Use the hysteresis near type of gate to keep the
pump on while pumping the level down.
13 3 ft. Trip 2 begins at 3 ft. from the sensor.
14 20 ft. Trip 2 ends at 20 ft. because any signal greater
will indicate a loss of echo or communication.
15 4 Any signal higher than 3 ft. or lower than 20 ft. will
cause the alarm relay to open.
24 ON Turn temperature compensation on for best accuracy.