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Intrinsically Safe Field Display0 pages
Humidity and Dew-Point Instruments
Intrinsically Safe Field Display
for use with Easidew I.S. and Easidew PRO I.S.
Technical Specications
Input
Current
4 to 20mA
Voltage drop
Less than 1.2V at 20°C
Less than 1.3V at –40°C
Less than 5V with optional loop powered
backlight
Display
Type
Liquid crystal, non-multiplexed 4 digits
34mm high
Resolution
Dewpoint: 0.1 °C/°F
ppmV/ppmW: 1 for 1000 – 9999
0.1 for 100.0 – 999.9
0.01 for 10.00 – 99.99
0.001 for 0.000 – 9.999
Span
Adjustable between 0 & ±9999 with a 20mA
input
Easidew PRO I.S for
illustration purposes
only. Transmitter
available separately.
Zero
Adjustable between 0 & ±9999 with 4mA
input
Over-range/Under-range
9999 or –9999 with all decimal points
ashing
The Intrinsically Safe Field Display is a 4-digit loop-powered
local monitor for the Easidew PRO I.S. and Easidew I.S.
transmitters. It is certied with ATEX, IECEx, and FM and
housed in an IP66 enclosure with a terminal compartment for
wiring. The measurement unit can be labelled as ppmV, ppmW,
°C dp or °F dp.
Certication (Display Only)
•
Loop powered 4-20mA indicator. Intrinsically safe certied
with ATEX, IECEx, and FM
Group II Category 1GD
Ex ia IIC T5 Ga
Ta = -40 to +70°C
IECEx
Ex ia IIC T5 Ga
Tamb = -40 to 70°C
FM
Highlights
ATEX
CL I, II, III: Div 1: GP A, B, C, D, E, F & G
T4 @ 70°C
Environmental
Operating temperature between -40 and +70°C
•
Bold 34mm high 4 digit display with optional backlight
•
Robust GRP enclosure providing IP66 protection. Can be
mounted by itself or inside a sampling system enclosure
•
Built-in terminal compartment for easy wiring
•
Two optional galvanically isolated solid state alarm
outputs
-40 to +70°C (-20 to +60°C for FM version)
Storage temp
•
Operating temperature
-40 to +85°C
Humidity
to 95% at 40°C non-condensing
Enclosure
IP66
Mechanical
Terminals
Screw clamp for 0.5 to 1.5mm2 conductors
Weight
1.7kg
Accessories
Backlight
Alarms
Two alarm outputs each of which may be
independently congured. Isolated solid
state switch complying with requirements for
simple apparatus.
Ron 5Ω + 0.7V max
Roff 1MΩ min
External keypad
Membrane keypad enables indicator to be
congured without removing cover.
Stainless steel legend plate
Dimensions
Green, loop powered. Voltage drop of
indicator plus backlight less than 5V
Etched legend plate with tag number
or application attached to front of the
instrument
Pipe mount kit
Stainless steel bracket secured by two
stainless steel worm drive hose clips for
60 to 80mm outside diameter vertical or
horizontal pipe
141mm (5.5”)
ppmV
P
E
Two M6 clearance
holes for suface
mounting
72mm (2.8”)
117mm (4.6”)
72mm (2.8”)
212mm (8.3”)
Easidew PRO I.S. Field Display
Three cable entries
M20 x 1.5 tapped
(Plain, unthreaded 22.25mm
diameter entries for FM and cFM version)
Issue No: I.S. Field Display 97320 V1.1 UK 0412
www.michell.com
Please note: Michell Instruments adopts a continuous development program which sometimes
necessitates specication changes without notice. Please contact us for latest version.
