Michell Instruments Promet I.S., User Manual

Page: 18 / 78

Promet I.S. User’s Manual
10 97221 Issue 5, March 2017
INSTALLATION
2.2 Operating Requirements
2.2.1 Environmental Requirements
The Promet 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 and IECEx or CSA and FM certi fi ed (to be speci fi ed
at time of order). 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 Promet 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 Promet I.S. sensor assembly.
2.2.2 Power Requirement
The Promet 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 Promet I.S. sensor assembly is powered through the 2-wire signal cable directly
from the control unit.
Please refer to the Promet I.S. Premium Sampling System Instructions for the power
requirement of the sampling system.
2.3 Mounting
2.3.1 Control Unit Installation
The Promet 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 should 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.
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
483mm
(19”)
375mm + 100mm for cable clearance
(14.75” + 3.9”)
3U
132mm
(5.2”)
Figure 5
Dimensions of the Control Unit