Longrun LRF-3300S, Руководство пользователя

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LRF-3300S Ultrasonic Transit-time Flow meter
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3. Transducer Installation
3.1. Transducer Installation
Please make sure the pipe surface where the transducers are to be mounted are all clean. Including the rust, scale
or loose paint to have a smooth surface. Choose the section and don’t forget apply the coupling compound. Apply
the coupling compound down the center of the face of each transducer as well as on the pipe surface, ensure there
are no air bubbles between the transducers and the pipe wall, and then attach the transducers to the pipe with the
straps provided and tighten them securely.
Note:
The two transducers should be mounted at the pipe’s centerline on horizontal pipes.
Make sure that the transducer mounting direction is parallel with the flow.
During the installation, there should be no air bubbles or particles between the transducer and the pipe wall. On
horizontal pipes, the transducers should be mounted in the 3 o’clock and 9 o’clock positions of the pipe section in
order to avoid any air bubbles inside the top portion of the pipe. (Refer to Transducer Mounting). If the
transducers cannot be mounted horizontally symmetrically due to limitation of the local installation conditions, it
may be necessary to mount the transducers at a location where there is a guaranteed full pipe condition (the pipe is
always full of liquid).
3.1.1 Transducer Spacing
The spacing between the ENDS of the two transducers is considered as the standard transducer spacing (Refer to
MENU14). After entering the required parameters, Check the data displayed in Window M14 and adjusted the
transducers spacing according to the data displayed in Windows M14.
3.1.2 Transducer Mounting Methods
There are two mounting method, you could use depend on the measuring environment.
V method and Z method (Reflect method and Direct method).
V method is easy to installation and fit for mostly ultrasonic environment but Z method has stronger signal and
works better in the complicated measuring environment.
3.1.3 V Method
The V method is considered as the standard method. It is convenient to use, but still requires proper installation of
the transducers, contact on the pipe at the pipe’s centerline and equal spacing on either side of the centerline.
Side view Section