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Installing the Dampening Material,
Transducers and Fixtures
Since the PT878GC is specifically designed for gas measurement
with clamp-on transducers, it requires the use of specially
designed fixtures and dampening material to maintain the highest
possible measurement accuracy. GE Sensing supplies the CFG
series of fixtures:
•
The V1 clamping fixture for pipes with diameters between
0.75 and 1.25 in. (20 to 30 mm).
•
The V4 clamping fixture for pipes with diameters between
1.25 and 4 in. (30 to 100 mm).
•
The V8 clamping fixture for pipes from 4 to 8 in. (100 to
200 mm).
•
The V12 clamping fixture for pipes from 8 to 12 in. (200 to
300 mm).
•
The PI clamping fixture for pipes from 12 to 24 in. (300 to
600 mm).
Figure 3-1 on the next page illustrates the V series and PI fixture
assemblies. Complete the steps in the following sections to
position and install the transducers, fixtures and dampening
material.
Installing the Dampening Material, Transducers and Fixtures
April 2009
Chapter 3
3-1
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