Chapter 1. Installation
1-3
DigitalFlow™ GC868 Startup Guide (1 and 2-Channel)
1.4
Installing
Damping
Material,
Transducers
and Fixtures
Since the GC868 is specifically designed for gas measurement with clamp-on
transducers, it requires the use of specially designed fixtures and damping material
to maintain the highest possible measurement accuracy. 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 1-1 below illustrates the V series and PI fixture assemblies. Complete the steps
in the following sections to position and install the transducers, fixtures and damping
material.
Figure 1-1: The V Series and PI Fixtures
1.4.1
Application
Requirements
Before you begin installation, you should ensure that your particular application
meets the minimum gas pressure requirements for the GC868 system.
•
For air, nitrogen, oxygen or argon, refer to Table 1-1 on page 1-4.
•
For natural gas, refer to Table 1-2 on page 1-6.
•
For steam, refer to Table 1-3 on page 1-7.
1.
Find the pipe size of your application
2.
Then find the pipe wall thickness of your application.
PI Fixture
Layout Tape
Chain
Strap
Dummy
Block
CFG-V4
CFG-V1
CFG-V8
CFG-V12
