GE PT878GC Manual De Usuario

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Installing the Dampening Material, Transducers and Fixtures
3-1
April 2004
Chapter 3
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 Panametrics 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.