Revision: 3.0.3
System normally requires signal strength over 6
directions. If the signal strength detected is too low, the transducer installation position and the transducer
mounting spacing should be re-
adjusted and the pipe should be re
method to be Z method.
4.2.2 Signal Quality (Q value)
Q value is short for Signal Quality (displayed in Window M90). It indicates the level of the signal detected. Q
value is indicated by numbers from 00~99
maximum.
Normally, the transducer position should be adjusted repeatedly and coupling compound application should be
checked frequently until the signal quality detected is as strong as possible.
4.2.3
Total Time and Delta Time
"Total Time and Delta Time"
, which displays in Window M93, indicates the condition of the installation. The
measurement calculations in the Flowmeter are based upon these two parameters. Therefore, when
fluctuates widely, the flow and velocit
ies fluctuate accordingly
poor. It may be the resulted of poor pipe-
installation conditions, inadequate transducer installation or incorrect
parameter input.
Generally, "Delta Time"
fluctuation should be less than
velocity is too low can the fluctuation be wider.
4.2.4 Transit Time Ratio
Transit Time Ratio indicates if the transducer mounting spacing is accurate. The normal transit time rat
be 100+/-
3 if the installation is proper. Check it in Window M91.
4.2.5 Warnings
(1)
Pipe parameters entered must be accurate; otherwise the Flowmeter will not work properly.
(2) D
uring the installation, apply enough coupling compounds in order to stick the transducer
pipe wall. While checking the signal strength and Q value, move th
mounting site until the strongest signal and maximum Q value can be obtained. Make sure that the
larger the pipe diameter, the more the transducer
(3)
Check to be sure the mounting spacing is accordance with th
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 di
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
to be changed.
Attention
If the transit time ratio is over 100
(1)
If the parameters (pipe outside diameter, wall thickness, pipe material, liner, etc.) have
been entered correctly,
(2)
If the transducer mounting spacing is accordance with the display in Window M25,
(3)
If the transducer is mounted at the pipe’s centerline on the same diameter,
If the scale is too thick or the pipe mounting is distorted in shape, etc.
D116
Series Ultrasonic Flowmeter
System normally requires signal strength over 6
0.0, which is detected from both upstream and downstream
directions. If the signal strength detected is too low, the transducer installation position and the transducer
adjusted and the pipe should be re
-inspected. If necessar
Q value is short for Signal Quality (displayed in Window M90). It indicates the level of the signal detected. Q
represents the minimum signa
l detected while 99 represent the
Normally, the transducer position should be adjusted repeatedly and coupling compound application should be
checked frequently until the signal quality detected is as strong as possible.
Total Time and Delta Time
, which displays in Window M93, indicates the condition of the installation. The
measurement calculations in the Flowmeter are based upon these two parameters. Therefore, when
ies fluctuate accordingly
, t
his means that the signal quality detected is too
installation conditions, inadequate transducer installation or incorrect
fluctuation should be less than
±
20%. Only when the pipe diameter is too small or
velocity is too low can the fluctuation be wider.
Transit Time Ratio indicates if the transducer mounting spacing is accurate. The normal transit time rat
3 if the installation is proper. Check it in Window M91.
Pipe parameters entered must be accurate; otherwise the Flowmeter will not work properly.
uring the installation, apply enough coupling compounds in order to stick the transducer
pipe wall. While checking the signal strength and Q value, move th
e transducers
mounting site until the strongest signal and maximum Q value can be obtained. Make sure that the
larger the pipe diameter, the more the transducer
s should be moved.
Check to be sure the mounting spacing is accordance with th
e display in Window M25 and the
transducer is mounted at the pipe’s centerline on the same diameter.
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 di
splayed 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,
out, and the liner is not too thick. Make sure there is indeed fluid in the pipe or
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
If the transit time ratio is over 100
±3, it is necessary to check:
If the parameters (pipe outside diameter, wall thickness, pipe material, liner, etc.) have
If the transducer mounting spacing is accordance with the display in Window M25,
If the transducer is mounted at the pipe’s centerline on the same diameter,
If the scale is too thick or the pipe mounting is distorted in shape, etc.
Series Ultrasonic Flowmeter
Page 17 of 53
0.0, which is detected from both upstream and downstream
directions. If the signal strength detected is too low, the transducer installation position and the transducer
Q value is short for Signal Quality (displayed in Window M90). It indicates the level of the signal detected. Q
l detected while 99 represent the
Normally, the transducer position should be adjusted repeatedly and coupling compound application should be
, which displays in Window M93, indicates the condition of the installation. The
measurement calculations in the Flowmeter are based upon these two parameters. Therefore, when
"Delta Time"
his means that the signal quality detected is too
installation conditions, inadequate transducer installation or incorrect
20%. Only when the pipe diameter is too small or
Transit Time Ratio indicates if the transducer mounting spacing is accurate. The normal transit time rat
io should
Pipe parameters entered must be accurate; otherwise the Flowmeter will not work properly.
uring the installation, apply enough coupling compounds in order to stick the transducer
s onto the
mounting site until the strongest signal and maximum Q value can be obtained. Make sure that the
e display in Window M25 and the
Pay special attention to those pipes that formed by steel rolls (pipe with seams), since such pipe is
splayed 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,
out, and the liner is not too thick. Make sure there is indeed fluid in the pipe or
close to a valve or elbow, and there are not too many air bubbles in the fluid,
is still no signal detected, the measurement site has
If the parameters (pipe outside diameter, wall thickness, pipe material, liner, etc.) have
If the transducer mounting spacing is accordance with the display in Window M25,
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