Appendices Manual CWD 2005
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102 Manual CWD2005.doc
Figure 24: Calibration gas connection
1. Calibration gas cylinder 2. Regulator, two stage
3. Flexible metal braided gas hose 4, Pre regulator 6 bars to 18 mbar
5. Pressure gauge 0 - 60 mbar 6. CWD 2005
11.5.3. Process gas connection
An inline filter is required at the process gas connection. LPG gas or Natural gas is
clean and a small filter can be used as protection against particles (see section 4.5.1
fig. 9). The use of a pressure gauge 0-
2
O (060 mbar) is recommended
between the pre regulator and the input of the CWD 2005.
Steel industry gases such as BF gas or Coke gas need a larger filter (see section
4.5.1 fig.10) and a mounting plate complete with a filter and bypass valves is an
available option.
Very dirty, contaminated gases need a special sample gas conditioning system
(available as an option) to remove Naphtha, H
2
S Tar, and NH
3
plus coal dust from
the sample gas.
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