Clamp-On Transducer Mounting Modes - Siemens SITRANS F Instruction Manual

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 equipment, other Siemens
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 horizon-
tal 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 recom-
mended 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.
Transducer located
at 9 o'clock

3.1.3 CLAMP-ON TRANSDUCER MOUNTING MODES

Siemens clamp-on transducers support Direct or Reflect mounting modes. The flow computer recom-
mends a mounting mode after analyzing your pipe and liquid data entries. However, you can install
clamp-on transducers in the way that best suits your application and the transducer type you purchased.
Transducer
Sonic Path
(Pipe shown at top view for ease in visualizing sonic path)
END VIEW OF PIPE
(Horizontal Plane)
Upstream
REFLECT MOUNT
Pipe
3-2
1010ENFM-3B
Transducer located
at 3 o'clock
Downstream
Transducer