Operating Requirements; Environmental Requirements; Power Requirement; Mounting - Michell Instruments Liquidew I.S. User Manual

INSTALLATION
2.2

Operating Requirements

2.2.1

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, CSA and FM certifi ed. 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 to +50°C (+32 to +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.
2.2.2

Power Requirement

The Liquidew I.S. control unit can be ordered for either of the following electrical
supplies:
• 85 to 265 V AC, 47/63 Hz @ 4W max 10W
OR
• 10 to 72 V DC @ 4W max 10W
The Liquidew I.S. sensor assembly is powered through the 2-wire signal cable directly
from the control unit.
Please refer to the Liquidew I.S. Premium Sampling System Instructions for the power
requirement of the sampling system.
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.
10
CHANNEL 1 CHANNEL 3
CHANNEL 2 CHANNEL 4
483mm
(19")
Dimensions of the Control Unit
Figure 5
Liquidew I.S. User's Manual
375mm + 100mm for cable clearance
(14.75" + 3.9")
97092 Issue 5.1, October 2018