3-2
1010PVNFM-3A
Section 3
•
Avoid mounting the transducers on a section of pipe with any external scale. Remove all
scale, rust, loose paint, etc., from the location.
•
Do not mount the transducers on a surface aberration (pipe seam, etc.)
•
Do not mount transducers from different ultrasonic flowmeters on the same pipe. Also, do
not run the transducer cables in common bundles with cables from communication equip-
ment, other Controlotron systems, or any type of ultrasonic equipment. You can run these
cables through a common conduit ONLY if they originate at the same flowmeter.
•
Never mount transducers under water, unless you order submersible units and you install
them in accordance with factory instructions.
•
Never mount transducers on the top or bottom of a horizontal pipe. The best placement on a
horizontal pipe is either the nine o’clock or three o’clock position for Reflect Mode, or one
transducer at nine o’clock and one transducer at three o’clock for Direct Mode. Mounting on
a vertical pipe is recommended only if flow is in the upward direction.
When mounting on a
vertical pipe flowing in a downward direction make sure there is sufficient back pressure in
the system to maintain a full pipe.
3.1.3 CLAMP-ON TRANSDUCER MOUNTING MODES
Controlotron clamp-on transducers support Direct or Reflect mounting modes. The flow com-
puter recommends a mounting mode after analyzing your pipe and liquid data entries. How-
ever, you can install clamp-on transducers in the way that best suits your application and the
transducer type you purchased.
END VIEW
(Horizontal Plane)
Transducer located
at 9 o’clock
Transducer located
at
at 3 o'clock
REFLECT MOUNT
(Pipe shown in top view for ease in visualizing sonic path)
Upstream
Transducer
Sonic Path
Pipe
Downstream
Transducer
