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The DPS300 is designed to detect and measure the sludge blanket in up to two
wastewater clarifiers. The basic requirements of a working DPS system are the
transducers and the associated electronics.
The electronics can be mounted at the clarifier or up to 365 m away from the
transducer. Refer to DPS300 Specifications in this manual.
The transducer is installed such that its face is immersed 3 to 6 cm in the clarifier
wastewater.
Beyond these given requirements, a few practical aspects of the clarifier
application and its operation are of particular concern.
Circular Clarifiers
There are several different types of circular clarifiers, but all operate in the same
basic way and share common design features that will need to be considered
when installing an InterRanger™ DPS300.
Some of these considerations are:
Catwalk, Bridge or Walkway
Most circular tanks have a catwalk that extends into the centre of the tank, usually
with 2" (51 mm) or similar, tubular railings. These railings are the recommended
mounting location for the InterRanger™.
The Siemens Mounting Assembly is available to locate the transducer in this
location.
Inlet
This is where the wastewater flows into the tank. Do not mount the transducer
close to the inlet because the water is aerated and the sludge is disturbed. To
obtain the most accurate readings, the sensor should be located above a relatively
undisturbed portion of the tank where aeration is not present.
Tank sides
The sensor must be mounted at least 1 m (3') from the side of the tank. If the
sensor is mounted closer than this the walls could cause interference and
ultimately lead to inaccurate signals or errors.
Ladders, Beams, Supports, etc.
Be sure that there are no permanent underwater obstructions within 1 m (3') of the
sensor that could disrupt the signal. Obtain drawings and/or consult with plant
personnel to locate any of these structures that may not be visible.
InterRanger DPS300
APPLICATION PLANNING
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7ML19981BC01
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