EES-501 Ultrasonic Flowmeter
Reversion: 3.0.1
Page 17 of 51
Step 7. Transducer Spacing
Press the
key to enter Menu
25, accurately install the transducer according to the
displayed transducer mounting spacing and the selected
mounting method.
( Details on Chapter 2.3 ).
Step 8. Display Measurement Results
Press
to enter Menu 01 to
display flow rate. ( Subject to the real measurement. )
2.3
Measurement Site Selection
Compared with other kinds of flowmeters, Ultrasonic Flowmeter is the simplest one to install. Choose a proper
measurement site, enter the pipe
’
s parameters into the flowmeter. Install and fix the transducers on the pipe as
instructed by the meter and start the measurement.
When selecting a measurement site, it is important to select an area where the fluid flow profile is fully developed
to guarantee a highly accurate measurement. Use the following guidelines to select a proper installation site:
l
Choose a section of pipe that is always full of liquid, such as a vertical pipe with flow in the upward direction
or a full horizontal pipe.
l
Ensure enough straight pipe length at least equal to the figure shown below for the upstream and downstream
transducers installation.
l
On the horizontal pipe, the transducer should be mounted on the 3 o
’
clock and 9 o
’
clock position of the pipe
section, avoid the 6 o
’
clock and 12 o
’
clock position, in order to avoid the signal attenuation caused by the
sediment at the bottom, or air bubbles or cavitation.
l
Ensure that the pipe surface temperature at the measuring point is within the transducer temperature limits.
l
Consider the inside condition of the pipe carefully. If possible, select a section of pipe where the inside is
free of excessive corrosion or scaling.
l
Choose a section of sound conducting pipe.
