Sierra Instruction Manual
InnovaSonic
®
203 Economical
19
Figure 5. V Method Transducer Mounting Method
4.1.4
Z Method
The signal transmitted in a Z method installation has less attenuation than a signal transmitted with the V method
Use for big pipes, if there are some suspended solid in the fluid, or the scaling and liner are too thick. This is
because the Z method utilizes a directly transmitted (rather than reflected) signal which transverses the liquid only
once.
The Z method is able to measure on pipe diameters ranging from 100mm to 800mm (4
〞
~32
〞
) approximately.
Therefore, we recommend the Z method for pipe diameters over 300mm (12
〞
).
Figure 6. Z Method Transducer Mounting Method
4.1.5
N Method (not commonly used)
With the N method, the sound waves traverse the fluid three times and bounce twice off the pipe walls. It is
suitable for small pipe diameter measurement.
The measurement accuracy can be improved by extending the transit distance with the N method (uncommonly
used).
Figure 7. N Method Transducer Mounting Method
4.2
Transducer Mounting Inspection
Check to see if the transducer is installed properly and if there is an accurate and strong enough ultrasonic signal
to ensure proper operation and high reliability of the transducer. This can be confirmed by checking the detected
signal strength, total transit time, delta time and transit time ratio.
The “mounting” condition directly influences the flow value accuracy and system reliability. In most instances,
you need only apply a wide band of sonic coupling compound lengthwise on the face of the transducer and stick it
Downstream Transducer
Upstream Transducer
Flow
Transducer Space
Flow
Side View
Top View
Section
Transducer
Pipe Strap
Downstream Transducer
Upstream Transducer
Flow
Transducer Spacing
Flow
Side View
Top View
Section
Pipe Strap
Transducer
Downstream Transducer
Upstream Transducer
Flow
Transducer Spacing
Flow
Side View
Top View
Section
Pipe Strap
Transducer
