Revision: 3.0.3
4.1.4
Z Method
The signal transmitted in a Z method installa
when the pipes are too large, there are some s
This is because the Z method utilizes a direct
liquid only once.
The Z method is able to measure on pipe diam
Therefore, we recommend the Z method for p
4.1.5
N Method (not commonly us
With the N method, the sound waves traverse
suitable for small pipe diameter measuremen
The measurement accuracy can be improved
used).
4.2
Transducer Mounting Inspec
Check to see if the transducer is installed prope
to ensure proper operation and high reliabilit
signal strength, total transit time, delta time a
The "mounting" condition directly influences
most instances, only apply a wide band of son
stick it to the outside pipe wall to get good m
be carried out in order to ensure the high reliab
4.2.1
Signal Strength
Signal strength (displayed in Window M90)
downstream directions. The relevant signal str
signal detected while 99.9 represents maximu
Normally, the stronger the signal strength det
the more stable the measurement value obtained.
Adjust the transducer to the best position and c
adequately during installation in order to obta
Downstream Transducer
Upstream Transducer
Flow
Side View
Downstream Transducer
Upstream Transducer
Flow
Side View
D116 Series Ultrason
llation has less attenuation than a signal transmitted with
e suspended solid in the fluid, or the scaling and liner ar
ectly transmitted (rather than reflected) signal which tran
iameters ranging from 100mm to 800mm (4
〞
~32
〞
) app
or pipe diameters over 300mm (12
〞
).
y used)
rse the fluid three times and bounce twice off the pipe w
ent.
ed by extending the transit distance with the N method (
nspection
roperly and if there is an accurate and strong enough ultr
ility of the transducer. It can be confirmed by checking t
e as well as transit time ratio.
uences the flow value accuracy and system long-time running
sonic coupling compound lengthwise on the face of the
good measurement results. However, the following inspection
eliability of the measurement and long-term operation of
0) indicates a detected strength of the signal both from up
l strength is indicated by numbers from 00.0~99.9. 00.0
imum signal strength.
h detected, the longer the operation of the instrument reliab
tained.
on and check to ensure that enough sonic coupling compound
o obtain the maximum signal strength.
er
Transducer
Flow
Top View
Section
Pipe Strap
Transducer
er
Transducer
Flow
Top View
Section
Pipe Strap
Transducer
sonic Flowmeter
Page 16 of 53
with the V method
r are too thick .
transverses the
) approximately.
pe walls. It is
hod (uncommonly
gh ultrasonic signal
ng the detected
unning reliability. In
he transducer and
tions still need to
on of the instrument.
upstream and
0.0 represents no
liably, as well as
pound is applied
cer Spacing
er Spacing
