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Gas
Gas
Chapter 3. MOUNTING AND WIRING
■
Mounting
●
Installation site
Avoid mounting the
CMG
in locations characterized by the following:
1.
Operating temperatures that fall below 14˚F and rise above 140˚F
2.
Operating humidity that exceeds 90%RH
3.
Sudden changes in temperature and condensation
4.
Corrosive gases and flammable gases
5.
Abundant conductive substances (e.g., dust, salt or iron dust) or organic
solvents
6.
Vibration or shock
7.
Direct sunlight
8.
Direct splashing by rain or water
9.
Splashing by fluids (e.g., oil, chemicals)
10.
Strong magnetic or electrical fields
11.
Where there is a pulsating flow.
1)
One cause is flexible piping (regardless of the material) with an accordion-
shape inner surface and a length of 500mm or more. Flexible piping (such as a
rubber hose) with a flat inner surface does not cause pulsation.
2)
Another cause is a reciprocating or rotary type gas booster or a flow meter
having rotary motion like a Roots meter.
12.
Where soot or moisture generation in the piping is expected due to fluctuation
in gas composition, etc.
●
Gas flow
Handling Precautions
Make sure that the gas flows into the device in the direction indicated
by the FLOW arrow on the side of the flow path.
Otherwise, the flow rate cannot be measured correctly.
5
