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5.2 Installing the Universal Clamping Fixture - UCF
The Universal Clamping Fixture (UCF) acts as a spacing device and a transducer holder. The UCF is available in two
lengths and consists of a number of components. Before you begin installation, you should verify your fixture is the
correct length and familiarize yourself with the fixture components.
5.2a Verifying Fixture Length
Make sure you note the following restrictions for your clamping fixture. The UCF is available in two lengths, 12 in.
and 24 in. (~30.5 cm and ~61 cm). Each size fixture can be installed for a single- or double-traverse method. However,
depending on the method used, there are pipe size restrictions that are outlined in Table 2.
Clamping Fixture
12-in. (30.5 cm)
24-in. (61 cm)
Note: The mounting chain provided is best suited for your application.
5.2b Identifying the UCF Components
The UCF has two adjustable short blocks that are used for the double-traverse method. Two slide tracks connect the
blocks. A ruler attached to one of the tracks helps set the transducer spacing. For single-traverse methods, a long block
is also used.
The blocks are used to hold the transducers in position for accurate measurement. The UCF is chained or strapped
around the pipe. The blocks are positioned using the spacing dimension calculated by the flowmeter. Then the
transducers are mounted into the blocks. Figure 3 on page 7 shows the short and long blocks.
The transducer installation consists of mounting the UCF to the pipe and then mounting the transducers into the fixture.
Refer to the appropriate section that follows for instructions:
•
Double-traverse Method - page 8
•
Single-traverse Method - page 11
6
Table 2: UCF Pipe Sizes
Single-Traverse
Length
Pipe Diameter
2 to 24 in. (5 to 61 cm)
24 to 48 in. (61 to 122 cm) 12 to 24 in. (30.5 to 61 cm)
Double-Traverse
Pipe Diameter
2 to 12 in. (5 to 30.5 cm)
C-PT Ultrasonic Flow Transducer Installation Guide
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