Liquidew I.S. User Manual
10
97092 Issue 5.3, September 2021
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 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.
2.2.2 Power Requirement
The Liquidew I.S. control unit can be ordered for either of the following electrical
supplies:
•
85...265 V AC, 47/63 Hz @ 4W max 10W
OR
•
10...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.
Ea
side
w PR
O I.S.
Pr
ocess De
wpoint T
ransmitt
er
20mm
(0.8”)
328mm
(12.9”)
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
483mm
(19”)
375mm + 100mm for cable clearance
(14.75” + 3.9”)
3U
132mm
(5.2”)
Sample port
1/8” NPT (F)
Figure 5
Dimensions of the Control Unit
Содержание Michell Instruments Liquidew I.S.
Страница 54: ...Liquidew I S User Manual 46 97092 Issue 5 3 September 2021 APPENDIX A Appendix A Technical Specifications ...
Страница 58: ...Liquidew I S User Manual 50 97092 Issue 5 3 September 2021 APPENDIX B Appendix B Serial Communications ...
Страница 63: ...Liquidew I S User Manual Michell Instruments 55 APPENDIX C Appendix C Modbus RTU Comms ...
Страница 65: ...Liquidew I S User Manual Michell Instruments 57 APPENDIX C ...
Страница 66: ...Liquidew I S User Manual 58 97092 Issue 5 3 September 2021 APPENDIX D Appendix D Hazardous Area Certification ...
Страница 69: ...Liquidew I S User Manual Michell Instruments 61 APPENDIX E Appendix E System Drawings ...
Страница 76: ...http www michell com www ProcessSensing com ...