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

212mm (8.3”)

141mm (5.5”)

Easidew PRO I.S. Field Display

ppm

Two M6 clearance

holes for suface

117mm (4.6”)

mounting

72mm (2.8”)

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

0.1 for 100.0 – 999.9

0.01 for 10.00 – 99.99

0.001 for 0.000 – 9.999

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

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”)

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

Easidew PRO I.S. Field Display

g g

Easidew PRO I.S.

Process Dewpoint Transmitter

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

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

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)

Tag Plate {Feature D}

No tag plate D1

Stainless steel tag plate (maximum 12 characters)