Revision: 3.0.3
7.2
Frequently Asked Questions and Answers
Question:
New pipe, high quality material, and all installation requirements met: why still no signal detected?
Answer:
Check pipe parameter settings, installation method and wiring connect
compound is applied adequately, the pipe is full of liquid, transducer spacing agrees with the screen
readings and the transducers are installed in the right direction.
Question:
Old pipe with heavy scale inside, no signal or
Answer: Check if the pipe is full of fluid.
Try the Z method for transducer installation (If the pipe is too close to a wall, or it is necessary to
install the transducers on a vertical or inclined pipe with fl
Carefully select a good pipe section and fully clean it, apply a wide band of coupling compound on
each transducer face (bottom) and install the transducer properly.
Slowly and slightly move each transducer with
the maximum signal is detected. Be careful that the new installation location is free of scale inside the
pipe and that the pipe is concentric (not distorted) so that the sound waves do not bounce
proposed area.
For pipe with thick scale inside or outside, try to clean the scale off, if it is accessible from the inside.
(Note: Sometimes this method might not work and sound wave transmission is not possible because of
the a layer of sc
ale between the transducers and pipe inside wall).
Question:
Why is the flow rate still displayed as zero while there is fluid obviously inside the pipe and a symbol
of "R" displayed on the screen?
Answer: Check to see if "Set Zero"
was carried out with fluid flowing inside the pipe(Refer to Window M42). If
it is confirmed, recover the factory default in Window M43.
D116
Series Ultrasonic Flowmeter
Frequently Asked Questions and Answers
New pipe, high quality material, and all installation requirements met: why still no signal detected?
Check pipe parameter settings, installation method and wiring connect
ions. Confirm if the coupling
compound is applied adequately, the pipe is full of liquid, transducer spacing agrees with the screen
readings and the transducers are installed in the right direction.
Old pipe with heavy scale inside, no signal or
poor signal detected: how can it be resolved?
Try the Z method for transducer installation (If the pipe is too close to a wall, or it is necessary to
install the transducers on a vertical or inclined pipe with fl
ow upwards instead of on a horizontal pipe).
Carefully select a good pipe section and fully clean it, apply a wide band of coupling compound on
each transducer face (bottom) and install the transducer properly.
Slowly and slightly move each transducer with
respect to each other around the installation point until
the maximum signal is detected. Be careful that the new installation location is free of scale inside the
pipe and that the pipe is concentric (not distorted) so that the sound waves do not bounce
For pipe with thick scale inside or outside, try to clean the scale off, if it is accessible from the inside.
(Note: Sometimes this method might not work and sound wave transmission is not possible because of
ale between the transducers and pipe inside wall).
Why is the flow rate still displayed as zero while there is fluid obviously inside the pipe and a symbol
was carried out with fluid flowing inside the pipe(Refer to Window M42). If
it is confirmed, recover the factory default in Window M43.
Series Ultrasonic Flowmeter
Page 38 of 53
New pipe, high quality material, and all installation requirements met: why still no signal detected?
ions. Confirm if the coupling
compound is applied adequately, the pipe is full of liquid, transducer spacing agrees with the screen
poor signal detected: how can it be resolved?
Try the Z method for transducer installation (If the pipe is too close to a wall, or it is necessary to
ow upwards instead of on a horizontal pipe).
Carefully select a good pipe section and fully clean it, apply a wide band of coupling compound on
respect to each other around the installation point until
the maximum signal is detected. Be careful that the new installation location is free of scale inside the
pipe and that the pipe is concentric (not distorted) so that the sound waves do not bounce
outside of the
For pipe with thick scale inside or outside, try to clean the scale off, if it is accessible from the inside.
(Note: Sometimes this method might not work and sound wave transmission is not possible because of
Why is the flow rate still displayed as zero while there is fluid obviously inside the pipe and a symbol
was carried out with fluid flowing inside the pipe(Refer to Window M42). If
To Next Page
Loading...
Need help?
General