Baker Panametrics PanaFlow LC, User Manual, Page: 15 / 68

PanaFlow™ LC User’s Manual 7
Chapter 2. Installation
2.4 Installing Clamping Fixtures
Installation of clamp-on transducers for transit-time measurements consists of mounting the clamping fixture to the
Installation of clamp-on transducers for transit-time measurements consists of mounting the clamping fixture to the
pipe and then mounting the transducers into the clamping fixture. When installing transducers in clamp-on
applications, you can use one of the following methods to hold the transducer against the pipe wall (this manual will
only cover the SCF and V-Series clamping fixture):
•
Strap Clamping Fixture (SCF)
• V-Series Clamping Fixture (CFG)
• Universal Clamping Fixture (UCF)
• Magnetic Clamping Fixture (MCF)
• Small Clamping Fixtures (CF-JR, CF-LP)
Note: The accuracy and performance of the flowmeter depends on the location, spacing, and alignment of the
transducers. This manual provides general instructions for locating and installing most transducer types.
However, the specific spacing of your transducers is unique to your installation.
2.4.1 Determining the Number of Traverses
The first step in the installation is determining the number of traverses (see Figure 5 below). The transducers can be
mounted using one of two methods:
•
Even number of-traverse method - the transducers are mounted on the same side of the pipe and the
ultrasonic signal is transmitted from one transducer to the other by reflection off the opposite pipe wall.
• Odd number of-traverse method - the transducers are mounted diagonally across from each other. The
ultrasonic signal is transmitted across the pipe directly from one transducer to the other.
Always try the even number of-traverse method first because it is easier to configure and yields greater accuracy.
However, if the pipe has poor inside surface conditions or the fluid is highly attenuating, you may not be able to
obtain a reliable signal. Therefore, you may have to use the Odd number of-traverse method in such applications.
The spacing of the transducers is calculated by the system after all the installation parameters have been
programmed into the flowmeter.
Figure 5: Even and Odd Number of Traverse Installation