Manual CWD 2005 Installation
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Manual CWD2005.doc 29
4.5. Gas connections
All gas connections should be leak tested before use. Tube compression fittings are
normally supplied and up to 5 gas connections are possible if all options including
process gas, 2 calibration gases, carrier gas and fast loop are specified.
4.5.1. Process gas filters
Two types of gas filters are recommended. Natural gas and other clean gases need a
filter with small internal volume. Filter elements need to be changed occasionally and
a pressure gauge can
can be activated before the filter change to provide a continuous output signal during
filter maintenance. Be sure to cancel memory hold after use.
Figure 9: Small filter
1 Input 6 mm) Gyrolok 2 Output 6 mm) Gyrolok
3 Removable element cap 4 Filter body 316 SS
5 Filter 20-30 m
Dirty gases need a filter with a larger volume and this will increase dead time.
Figure 10: Filter with drain connection
1 Filter inlet 2 Filter way
3 Inlet 6 mm) Gyrolok 4 Outlet 6 mm) Gyrolok
5 Filter 99,8% at 0,1 m 6 Filter cap
7 Filter housing 316 SS
(7) Filter volume: 23 cm³ (0.00081 ft³ or 1.4 cu. inches)
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