Setup Procedure
ORCA Sonar System
20
App Type
App Type is the first output and should be considered the primary measurement. If monitoring Bed level this
should be selected here. App Type has three pre-set application types.
• Bed (dense/heavy blanket layer).
• RAS (return activated sludge)
• Floc (Flocculent/hindered settling layer).
Parameter Description Options
App Type Set display readout Bed RAS Floc
Density Select interface to be measured See Interface Table below
Calibrat
• Manually fine tune sensor sensitivity
• Press CAL to fire a test pulse which will
return the depth measurement.
Higher value for lighter densities, lower
value for heavier densities.
Lo Level Set Lo Level measurement point (4mA) Adjustable
Hi Level Set Lo Level measurement point (20mA) Adjustable
Bed Depth
(1)
Set maximum expected Bed Depth - see Bed Depth
(1)
for further information
Adjustable in depth (measured from
Sensor face down)
Fill Rate* Set potential filling rate for primary measurement Adjustable (units per hour)
Empty Rate* Set potential emptying rate for primary measurement Adjustable (units per hour)
*For most applications the unit is pre-calibrated with appropriate tracking speeds.
You will not need to adjust these settings.
Density
Selected (g/l)
Typical Applications
0.1 - 0.6 Lighter layers
0.6 - 1.2 Hindered Layer Settling Layer
1.2 - 3.0 RAS
3.0 - 6.0 RAS Bed
6.0 -1 0.0 Bed
10+ Bed / Heavy Sludge
Inter face Table
1/3 Radius
1/2 Submerged
High Level
20mA
0.600m
Low Level
4mA
X.xxm
Blanking /
non-measured
zone
Bed Depth
(Max Bed + 1m (3ft)
Max Bed
1m
Bed Depth
(1)
Bed Depth should be programmed to 1m (3ft) higher
than the application expected maximum depth
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