In order to use the MultiRanger Plus as a differential level detector TB-1 must be
wired as in Installation \ Installing the Transducer and both transducers must be
installed at the same level.
A = transducers must be at the same elevation ( P-3 ).
B = maximum differential ( Span, P-4 )
C = transducer should be mounted at least 0.3 m above
the highest liquid level and 0.3 m away from the wall
for every 3 m / ST-25 or 6 m / ST-50 of measurement.
Differential Level Example
The application is to monitor the differential level across a sewage bar screen. When
a differential level of greater than 12" is obtained, it is required that a rake be started.
If the water level on either side rises above 20", a high level alarm is required.
The height from the common ( low ) level to the transducer face is 4 ft . A 4 - 20 mA
output corresponding to the differential is required, and the 20 mA has been arbitrarily
set to correspond to a 24" differential ( span ). In the event of a loss of echo, the
MultiRanger Plus should go into a fail-safe high after 5 minutes.
select:
P-1 enter option "4", units in inches
P-2 enter option "3", differential level
P-3 enter "48", empty distance to transducer
P-4 enter "24", span
P-5 enter "11.81", blanking distance, ( use factory setting )
P-6 enter option "24", 4 - 20 mA output
P-7 enter "1", display max 1 digit after decimal
P-8 enter option "4", relay 1 - differential alarm
P-9 enter "12", relay 1 - rake on
This would be used only to initiate
the rake control circuitry.
PL-443 6 – 24
To Next Page
Loading...
Need help?
General
