Panametrics CTF878, Руководство для стартапов

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Chapter 2.
12 Model CTF878 Startup Guide
Applying DMP-1 Damping Material for a CFT-V Clamping Fixture
Note: If DMP-3 damping material is being used, refer to Applying DMP-3 Damping Material on page 20. If the pipe
temperature is over 150°F, a PDJ pipe damping jacket with DMP-3 damping material is required (see
Installing the PDJ Damping Jacket
on page 23).
The surface of the pipe should be covered with damping material. Three pieces of the material should be placed as
follows: one between the ends of the CFT-V clamping fixture and one on either side of the fixture. Use the following
instructions and Figure 3 on page 13:
Note: The damping material pieces come cut to size as follows:
Length = outside diameter of pipe X 3.25
Width = 15 inches for a CFT-V8 clamping fixture
19 inches for a CFT-V12 clamping fixture
1. Place the first piece of damping material at the flow velocity measurement section. Position the strip as shown in
Figure 3.
2. Peel the protective layer of paper off the damping material from the top to approximately 3 inches down and
apply the strip to the pipe, starting from the top.
Note: If too much of the paper layer is peeled off at one time, the damping material will be harder to handle and
apply to the pipe without making air bubbles.
IMPORTANT: The damping material should adhere very tightly to the pipe.
3. Continue to peal off the paper and apply the damping material to the pipe 3 inches at a time. Pull on the strip
during each application to assure a tight fit.
4. Before peeling off each new section of the paper layer, be sure the previously applied section of damping
material adheres firmly to the pipe. Apply pressure to it with your hands, going from the previously applied to the
newly applied section.
Note: The purpose of this operation is to avoid the presence of air bubbles between the damping material and the
pipe.
When the user is done applying the damping material, there should be one layer of it around the pipe with a small
overlap.
5. Visually inspect the pipe for the presence of air bubbles and wrinkles. Then apply pressure to any bubbles and
wrinkles to eliminate them.
6. Repeat steps 2 through 5 to apply the two other strips of damping material on either side of the first, leaving
about a two-inch gap between the strips.
Note: The brackets of the CFT-V clamping fixture will rest against the pipe in the two gaps between the strips of
damping material (see Figure 14 on page 26).