InterRanger DPS300
18
7ML19981BC01
Moving or Travelling Bridges
On some clarifiers the bridge or walkway moves with the skimmer. For clarifiers
with these types of arrangements, care must be taken when choosing a mounting
location. The following items should be considered when choosing a location on
the bridge:
•
The transducer should be mounted in front of the bottom scraper mechanism.
The sludge becomes very disturbed after the passing of a bottom scraper and a
clean interface will be difficult to detect. Mount the transducer in front of the
scraper, ideally 180
°
from the scraper or 90
°
if two scrapers exist.
•
Ensure that the transducer will not come into contact with the scum trough.
It is important to observe the bridge motion through at least one complete cycle to
ensure that the transducer and/or the mounting assembly will not collide with any
structures in the tank.
Rectangular Clarifiers
There are several different types of rectangular 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 the considerations are:
Catwalk, Bridge or Walkway
Some rectangular tanks have a bridge that spans across the entire width of the
tank, usually with 2" (51 mm) or similar, tubular railings. These railings are the
recommended mounting location for the InterRanger™ once a suitable spot has
been found.
The Siemens Mounting Assembly is available to secure the transducer in this
location.
bridge
direction
mounting
location
handrail
travelling bridge