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Liquidew I.S. User Manual
2.2
Environmental Requirements
The Liquidew I.S. sensor assembly is intrinsically safe and designed to be installed on-
site, indoors or outdoors, directly at the point of measurement within a Hazardous Area.
The sensor assembly is ATEX, IECEx, UKCA and QPS certified. To operate correctly,
the sensor assembly must be installed within a suitable sampling system (Michell
Instruments can supply standard and custom designed sampling systems).
The Liquidew I.S. control unit is NOT designed for use in a Hazardous Area and should
only be installed in a safe area. The control unit is intended for indoor installation only
and operates within environmental limits of 0...+50 °C (+32...+122 °F) and <90 %rh.
The control unit contains built-in isolation barriers permitting connection, direct from
the Hazardous Area, of the Liquidew I.S. sensor assembly.
2.3
Mounting
2.3.1
Control Unit Installation
The Liquidew I.S. control unit is contained in a 19" sub-rack case (size 3U). It should be
installed in a 19" rack using the mounting holes provided. It must be placed in a position
free from any appreciable vibration and shaded from direct sunlight.
NOTE: The materials and construction of the control unit allow for operation
in an indoor, clean, non-hazardous only, control room environment.
Michell Instruments
349
16
Figure 4
Dimensions of the Control Unit (in mm)
INSTALLATION
483
7
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