Michell Instruments Intrinsically Specifications
Humidity and Dew-Point Instruments
Intrinsically Safe Field Display
for use with Easidew I.S. and Easidew PRO I.S.
Technical Specifi cations
Input
Current 4 to 20mA
Voltage drop Less than 1.2V at 20°C
Display
Type Liquid crystal, non-multiplexed 4 digits
Resolution Dewpoint: 0.1 °C/°F
Span Adjustable between 0 & ±9999 with a 20mA
Easidew PRO I.S for
illustration purposes
only. Transmitter
available separately.
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 certifi ed 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.
Highlights
• Loop powered 4-20mA indicator. Intrinsically safe certifi ed
with ATEX, IECEx, and FM
• 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
Dimensions
g
g
212mm (8.3”)
g
g
141mm (5.5”)
Easidew PRO I.S. Field Display
g
ppm
V
E
P
Two M6 clearance
holes for suface
g
117mm (4.6”)
mounting
g
g
72mm (2.8”)
g
Zero Adjustable between 0 & ±9999 with 4mA
Over-range/Under-range 9999 or –9999 with all decimal points
Certifi cation (Display Only)
ATEX Group II Category 1GD
IECEx Ex ia IIC T5 Ga
FM CL I, II, III: Div 1: GP A, B, C, D, E, F & G
Environmental
Operating temperature -40 to +70°C (-20 to +60°C for FM version)
Storage temp -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 Green, loop powered. Voltage drop of
Alarms Two alarm outputs each of which may be
External keypad Membrane keypad enables indicator to be
Stainless steel legend plate Etched legend plate with tag number
Pipe mount kit Stainless steel bracket secured by two
Less than 1.3V at –40°C
Less than 5V with optional loop powered
backlight
34mm high
ppm
/ppmW: 1 for 1000 – 9999
V
0.1 for 100.0 – 999.9
0.01 for 10.00 – 99.99
0.001 for 0.000 – 9.999
input
input
fl ashing
Ex ia IIC T5 Ga
Ta = -40 to +70°C
Tamb = -40 to 70°C
T4 @ 70°C
indicator plus backlight less than 5V
independently confi gured. Isolated solid
state switch complying with requirements for
simple apparatus.
5Ω + 0.7V max
R
on
R
1MΩ min
off
confi gured without removing cover.
or application attached to front of the
instrument
stainless steel worm drive hose clips for
60 to 80mm outside diameter vertical or
horizontal pipe
72mm (2.8”)
g
Three cable entries
Issue No: I.S. Field Display 97320 V1.1 UK 0412
M20 x 1.5 tapped
(Plain, unthreaded 22.25mm
diameter entries for FM and cFM version)
www.michell.com
Please note: Michell Instruments adopts a continuous development program which sometimes
necessitates specifi cation changes without notice. Please contact us for latest version.
Electrical Connections
Hazardous Area Safe Area
ppm
V
Easidew PRO I.S. Field Display
E
P
g
g
Easidew PRO I.S.
Process Dewpoint Transmitter
g
h
4/20mA
Humidity and Dew-Point Instruments
Intrinsically Safe Field Display
I.S. Galvanic Isolator (can be
purchased with Easidew PRO I.S.)
4/20mA
g
circuit
Accessories
Pipe mount kit EPD-PMK
Connection kit (including 2 cable glands and 0.5 meter cable
BS5308, crimped)
EPD-CAB
Ordering Codes
To construct the order code, select the relevant feature from the tables below, starting with the base model, which is {Feature A} and then add on option to create a
string: {Feature A}+{Feature B}+{Feature C}+{Feature D}+{Feature E}+{Feature F}+{Feature G}
Order example: EPD + BX(0/100P) + C1 + D2 + E1 + F1 + G1
Easidew PRO I.S. Field Display, 0 to 100 ppmV , no backlight, tag plate, no alarms and no keypad, ATEX+IECEx certification.
EPD BX(0/100P) C1 D2 E1 F1 G1
Base Model {Feature A}
I.S. Field Display EPD
Range {Feature B}
-100 to +20°C (-148 to +68°F) dewpoint input range
v = zero value (must be the same as
the associated transmitter)
w = full scale value (must be the same
as the associated transmitter)
x = unit – must be the same as the
associated transmitter – (C = °Cdp,
F=°Fdp, P=ppmV)
Backlight {Feature C}
No backlight C1
Backlight (no additional wiring required) C2
B1
BX
Certifi cation {Feature G}
ATEX Gas, IECEx G1
ATEX Gas and dust, IECEx G2
ATEX Gas, IECEx, FM, cFM (cable entries
change from M20 to plain, unthreaded
22.25mm diameter entries)
Keypad {Feature F}
No keypad F1
External keypad F2
Alarms {Feature E}
No alarms E1
Alarm switch (dual, galvanically isolated
solid state)
G3
E2
© Michell Instruments 2009-2012
Tag Plate {Feature D}
No tag plate D1
Stainless steel tag plate (maximum 12
characters)
D2
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