LRF-3000S Ultrasonic Transit-time Flow meter
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4.2.5.
Warnings
(1)
Pipe parameters entered must be accurate; otherwise the Flow meter will not work properly.
(2)
During the installation, apply enough coupling compounds in order to stick the transducers onto the
pipe wall. While checking the signal strength and Q value, move the transducers slowly around the
mounting site until the strongest signal and maximum Q value can be obtained. Make sure that the
larger the pipe diameter, the more the transducers should be moved.
(3)
Check to be sure the mounting spacing is accordance with the display in Window M14 and the
transducer is mounted at the pipe’s centerline on the same diameter.
(4)
Pay special attention to those pipes that formed by steel rolls (pipe with seams), since such pipe is
always irregular. If the signal strength is always displayed as 0.00, that means there is no signal
detected. Thus, it is necessary to check that the parameters (including all the pipe parameters) have
been entered accurately. Check to be sure the transducer mounting method has been selected properly,
the pipe is not worn-out, and the liner is not too thick. Make sure there is indeed fluid in the pipe or
the transducer is not too close to a valve or elbow, and there are not too many air bubbles in the fluid,
etc. With the exception of these reasons, if there is still no signal detected, the measurement site has
to be changed.
(5)
Make sure that the Flow meter is able to run properly with high reliability. The stronger the signal
strength displayed, the higher the Q value reached. The longer the Flow meter runs accurately, the
higher the reliability of the flow rates displayed. If there is interference from ambient electromagnetic
waves or the signal detected is too poor, the flow value displayed is not reliable; consequently, the
capability for reliable operation is reduced.
(6)
After the installation is complete, power on the instrument and check the result accordingly.
