Differential Level
Sultan Acoustic Wave Series
29
Note: Differential level requires a junction box AWRT-JB-01
What is Differential Level?
Differential Level (Diff O/P) is the term used to define
the measured difference between two material levels
using two Transducers. The Transducers are referred
to as Sensor 1 and Sensor 2.
Diff Calculation
In differential Mode the material level measured
by Sensor 1 is subtracted from the material level
measured by Sensor 2. Negative results will be reset
to zero. The differential value is calculated as follow:
Diff = MaterialLevel2 – MaterialLevel1
MaterialLevel2 = LowLevel2 – Space2
MaterialLevel1 = Lowlevel1 – Space1
Analog Output
Analog output is calculated based on the differential
value.
The span of the analog output is according to
the Lowlevel1 and Hilevel1. The analog output is
calculated according the following equation:
Current (mA) = 16 * (Diff)/(LowLevel1
–HiLevel1) + 4mA
Setting Sensor ID
You will need to assign one transducer to ID2.
To do this perform the following steps
1. Connect only one of the transducers
2. Enter ‘Quickset’ and change the display mode to
AvgMatrl
3. Scroll down until you see 1:Sen Add 1 option.
4. Press CAL to edit. Select ‘1’ for current
transducer and press CAL again.
The menu then proceeds to Tx Add:,
5. Press CAL to edit, press UP to scroll from 1 to 2
and press CAL to save.
The currently connected transducer is now on ID2
You can now connect the other transducer to the
junction box which will be ID1 to complete the
measurement pair required.
Accessing both Sensors Parameters
Both Sensor 1 and Sensor 2 parameters can be
accessed through the KeyPad.
The parameter ‘Sensor’ in ‘Advanced’ determines
which sensor (1 or 2) will be currently accessed if
required to adjust settings.
Relays
Relay Mode = EN (L1 < L2) Relay Mode = DEN (L1 < L2)
OFF ON
L2 = Diff2 L2 = Diff2
L1 = Diff1 L1 = Diff1
ON OFF
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