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Chapter 3. MOUNTING AND WIRING
• Wire 1-5V output, 4-20mA output, open collector output, and
communications separately from the power line and power supply
leads.
Do not wire these outputs in the same conduit as the power line
and power supply leads. Doing so might cause malfunction.
• Install a switch for shutting off the main power to the device
within reach of the person operating the device.
• The common mode voltage between output and ground should
be less than 33V RMS, 46.7V at peak or 70Vdc, excluding power
supply and relay contact output.
Mounting
z
Installation site
Avoid mounting the CMG in locations characterized by the following:
(1) Operating temperatures that fall below -10°C and rise above 60°C
(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) Where it is near the electrical noise source.
(11) Strong magnetic or electrical fields
(12) Where there is a pulsating flow.
1) One cause is flexible piping (regardless of the material) with an
accordionshape 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.
