15
W-Mode
FIGURE 26:
Mounting of Transducers in W-Mode
Transducer 1
Transducer 2
The W-mode is a special method for mounting the ultra-
sonic transducers. This method is usually employed on
very small pipes.
Z-Mode
FIGURE 27:
Mounting of Transducers in Z-Mode
Transducer 1
Transducer 2
The Z-mode is a special method for mounting the ul
-
trasonic transducers. The signal is transmitted across
a shorter distance with this installation method. Use for
measuring large-scale piping systems, or where the sys-
tem is filled with heavily contaminated or gas-loaded fluid.
MEASURING WITH UFM
5 Steps to Flow Measurement:
• Select a suitable location for mounting the ultrasonic
transducers
• Setup the UFM pipe parameters
• Mount the ultrasonic transducers onto the piping
• Perform a zero calibration
• Start the flow measurement
SETUP PARAMETERS
Ths section defines the input of all data that is necessary
for flow measurement.
• “QUICK SETUP”:
The Quick Setup guide offers step-
by-step instructions on the essential tasks required to
setup parameters.
• “COMPL SETUP”:
The complete setup function
enables access to all options and expert settings.
WHAT NEEDS TO BE SETUP
• The pipe’s outer diameter or circumference.
• The wall thickness of the pipe. The material and thick
-
ness of the pipe lining, if such lining exists.
• The pipe material
• The fluid
•
The type of ultrasonic transducers
•
The mounting mode for the ultrasonic transducers
i
Ultrasonic measurement is based on the signal
transit time process. The ultrasonic signals
penetrate the piping and the fluid. In order to
calculate the signal transit time, each fluid, pip
-
ing material and existing lining will be assigned a
sonic speed value, as well as the pipe diameter
or circumference value. The tabular database
specifies the sonic speed values for the materials
and fluid. The sonic speed for materials not listed
in the tables must be entered manually. Tables
that list additional sonic speed parameters for
different materials are available in the back of
these operating instructions.
TEL: 888-722-3569 • 973-940-1684 • FAX: 1-973-940-1651 • www.GPImeters.com
TEL: 888-722-3569 • 973-940-1684 • FAX: 1-973-940-1651 • www.GPImeters.com