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Operating Manual
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Michell Instruments Pura Operating Manual

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Pura
Hazardous Area Transmitter 2-wire
User’s Manual
97306 Issue 1.1, March 2016
Michell Instruments
Inside front cover (blank)
I.S.
Pura Hazardous Area Transmitter
© 2007-2012 Michell Instruments
This document is the property of Michell Instruments Ltd. and may not be copied or otherwise reproduced, communicated in any way to third parties, nor stored in any Data Processing System without the express written authorization of Michell Instruments Ltd.
97306 Issue 1.1, March 2016 iii Michell Instruments
Contents
Safety ..............................................................................................................................................vi
Electrical Safety .........................................................................................................................vi
Pressure Safety .........................................................................................................................vi
Toxic Materials ..........................................................................................................................vi
Repair and Maintenance.............................................................................................................vi
Calibration ................................................................................................................................vi
Safety Conformity ......................................................................................................................vi
EC Declaration of Conformity.............................................................................................................vii
Abbreviations .................................................................................................................................. viii
Warnings ........................................................................................................................................ viii
Recycling Policy .................................................................................................................................ix
WEEE And RoHS Compliance ..............................................................................................................ix
Calibration Facilities ...........................................................................................................................ix
Manufacturing Quality ........................................................................................................................ix
Warranty .......................................................................................................................................... x
Return Policy ..................................................................................................................................... x
1 INTRODUCTION ........................................................................................................................ 1
2 DESCRIPTION ........................................................................................................................... 1
3 PREPARATION FOR USE ............................................................................................................. 2
4 SENSOR INSTALLATION ............................................................................................................. 3
4.1 Installing the Sensor ....................................................................................................... 3
4.2 Pura Transmitter (Sensor Only Version) Installation ........................................................... 4
4.3 Transmitter Cable .......................................................................................................... 6
4.4 Preparation of the Sensor Cable ....................................................................................... 7
4.5 Installation in Hazardous Areas ........................................................................................ 9
5 WHICH GASES TO MEASURE? .................................................................................................... 9
6 MAINTENANCE .......................................................................................................................... 9
7 FAULT CONDITIONS .................................................................................................................10
7.1 Sampling Hints ..............................................................................................................10
97306 Issue 1.1, March 2016 iv Michell Instruments
Figures
Figure 4.1 Pura Premium & Pura OEM Dimensional Drawings ....................................................3
Figure 4.2 Pura Sensor Dimensional Drawing ...........................................................................5
Figure 4.3 Terminal block Removal ..........................................................................................6
Figure 4.4 Bare wires .............................................................................................................7
Figure 4.5
Figure 4.6 Cut to 5mm ...........................................................................................................7
Figure 4.7 Connection to Pura I.S.TX ......................................................................................7
Figure 4.8 Rear of connector terminal block .............................................................................8
Figure 4.9 Electrical Connections ............................................................................................8
Figure 7.1 Installation location .............................................................................................. 10
Figure 7.2 Indication of dead space ......................................................................................10
Crimped wires .......................................................................................................7
Appendices
Appendix A Technical Specifi cations ......................................................................................... 12
Appendix B Hazardous Area Certifi cation .................................................................................. 14
B1 Terminal Parameters ................................................................................. 14
B2 Special Conditions of Use .......................................................................... 14
Appendix C System Drawings .................................................................................................. 16
C1 Baseefa Approved System Drawing ............................................................ 16
C2 FM Approved System Drawing ................................................................... 17
C3 CSA Approved System Drawing .................................................................. 18
Appendix D List of Worldwide Michell Instruments’ Offi ces ......................................................... 20
Michell Instruments v 97306 Issue 1.1, March 2016
Safety
The manufacturer has designed this equipment to be safe when operated using the procedures detailed in this manual. The user must not use this equipment for any other purpose than that stated. Do not apply values greater than the maximum value stated.
This manual contains operating and safety instructions, which must be followed to ensure the safe operation and to maintain the equipment in a safe condition. The safety instructions are either warnings or cautions issued to protect the user and the equipment from injury or damage. Use competent personnel using good engineering practice for all procedures in this Manual.
Electrical Safety
The instrument is designed to be completely safe when used with options and accessories supplied by the manufacturer for use with the instrument.
Pressure Safety
DO NOT permit pressures greater than the safe working pressure to be applied to the instrument. The specifi ed safe working pressure is 24 MPa (240 barg / 3480 psig).
Toxic Materials
The use of hazardous materials in the construction of this instrument has been minimized. During normal operation it is not possible for the user to come into contact with any hazardous substance which might be employed in the construction of the instrument. Care should, however, be exercised during maintenance and the disposal of certain parts.
Repair and Maintenance
The instrument must be maintained either by the manufacturer or an accredited service agent. Refer to Appendix D for details of Michell Instruments’ worldwide offi ces’ contact information.
Calibration
The recommended calibration interval for this instrument is 12 months unless it is to be used in a mission­critical application or in a dirty or contaminated environment in which case the calibration interval should be reduced accordingly. The instrument should be returned to the manufacturer, Michell Instruments Ltd., or one of their accredited service agents for re-calibration.
Safety Conformity
This product meets the essential protection requirements of the relevant EU directives. Further details of applied standards may be found in the product specifi cation.
97306 Issue 1.1, March 2016 vi Michell Instruments
EU Declaration of Conformity
NOTE: The PURA I.S. product incorporates the ATEX/IECEx/CSA/FM approved Easidew I.S. product and it is the Hazardous Area Certifi cation for the Easidew I.S. that provides the necessary approvals for the PURA I.S.
Michell Instruments vii 97306 Issue 1.1, March 2016
Abbreviations
The following abbreviations are used in this Manual:
AC alternating current atm pressure unit (atmosphere) barg pressure unit (=100 kP or 0.987 atm) ºC degrees Celsius ºF degrees Fahrenheit DC direct current ft foot (feet) g gram(s) Hz Hertz “ inch(es) kg kilogram(s) lb pound Nl/min normal liters per minute m meter(s) mA milliampere max maximum min minute(s) mm millimeter(s) MPa megapascal (Pascals x106) m/sec meters per second Nm Newton meter ppmV parts per million (by volume) RS232 serial data transmission standard Rx receive scfh standard cubic feet per hour scfs standard cubic feet per second sec second(s) temp temperature Tx transmit V Volts Ω Ohms
Warnings
The following general warnings listed below are applicable to this instrument. They are repeated in the text in the appropriate locations.
Where this hazard warning symbol appears in the following
sections it is used to indicate areas where potentially
hazardous operations need to be carried out.
97306 Issue 1.1, March 2016 viii Michell Instruments
Recycling Policy
Michell Instruments is concerned with the protection of the environment. It is our commitment to reduce and eliminate from our operations, wherever possible, the use of substances which may be harmful to the environment. Similarly, we are increasingly using recyclable and/or recycled material in our business and products wherever it is practical to do so.
The product that you have purchased may contain recyclable and/or recycled parts and we will be happy to provide you with information on these components if required.
WEEE And RoHS Compliance
The Waste Electronic and Electrical Equipment (WEEE) Directive, and the Restriction of Hazardous Substances (RoHS) Directive place rules upon European manufacturers of electrical and electronic equipment. The directive’s aim is to reduce the impact that electronic devices have on the environment.
Michell products are currently exempt from the RoHS directive, however all future products will be developed entirely using compliant materials. Furthermore, Michell is taking active steps to remove non-compliant materials and components from existing products wherever possible.
Michell is in full compliance with the WEEE Directive (Registration No. WEE/JB0235YW). Customers may be required to return certain instruments for treatment at the end of their working life.
June 2010
Calibration Facilities
Michell Instruments’ calibration facilities are among the most sophisticated in the world and have been recognized for their excellence.
Traceability to the National Physical Laboratory (NPL) UK is achieved through our UKAS Accreditation (Number 0179). This covers dew point over the range -90 to +90°C (-130 to +194°F) and also Relative Humidity.
Dew-point calibrations are also traceable to the National Institute for Standards & Technology (NIST) USA over the range -75 to +20°C (-103 to +68°F).
NOTE: Standard traceable calibration certifi cates for instruments and sensors are not issued under our UKAS accreditation. UKAS certifi cates are usually to special order and are clearly identifi ed.
Manufacturing Quality
Michell Instruments is registered with the British Standards Institute for Quality Assurance to:
BS EN ISO 9001: 2008
Rigorous procedures are performed at every stage of production to ensure that the materials of construction, manufacturing, calibration and fi nal test procedures meet the requirements laid down by our BSI approved Quality System.
Please contact Michell Instruments if the product does not arrive in perfect working order.
Michell Instruments ix 97306 Issue 1.1, March 2016
Warranty
Unless otherwise agreed, the Supplier warrants that, as from the date of delivery for a period of 12 months, the goods and all their component parts, where applicable, are free from any defects in design, workmanship, construction or materials.
The Supplier warrants that the services undertaken shall be performed using reasonable skill and care, and of a quality conforming to generally accepted industry standards and practices.
Except as expressly stated all warranties, whether express or implied, by operation of law or otherwise, are hereby excluded in relation to the goods and services to be provided by the Supplier.
All warranty services are provided on a return to base basis. Any transportation costs for the return of a warranty claim shall reside with the Customer.
Return Policy
If a Michell Instruments’ product malfunctions within the warranty period, the following procedure must be completed:
1. Notify a Michell Instruments’ representative, giving full details of the problem, the model variant and the serial number of the product.
2. If the nature of the problem indicates the need for factory service then the instrument should be returned to Michell Instruments, carriage prepaid,
preferably in the original packaging, with a full description of the fault and the customer contact information.
3. Upon receipt, Michell Instruments will evaluate the product to determine the cause of the malfunction. Then, one of the following courses of action will be taken:
• If the fault is covered under the terms of the warranty, the
instrument will be repaired at no cost to the owner and returned.
• If Michell Instruments determines that the fault is not covered
under the terms of the warranty, or if the warranty has expired, an estimate for the cost of the repairs, at standard rates, will be provided. Upon receipt of the owner’s approval to proceed, the product will be repaired and returned.
97306 Issue 1.1, March 2016 x Michell Instruments
1 INTRODUCTION
The Pura Series of transmitters has been manufactured, tested and calibrated to the highest available standards and should arrive in perfect working order, ready for installation into a gas measurement application. If there are any questions about the transmitter or how to install it, not detailed in this Manual, contact your local representative. Refer to Appendix D for details of Michell Instruments’ worldwide offi ces’ contact information.
The Pura is a continuous, on line instrument for the measurement of moisture content in air and other gases over an operating range of -120°C to -40°C dew point. The Pura operates as a 4-20 mA or digital transmitter providing an output to an external control or monitoring device, and is factory set over the range -120°C to
-40°C dew point. However, the range can be adjusted using the Pura application software available as a free download via the website: www.michell.com.
2 DESCRIPTION
Their key features of the Pura Trransmitter are:
• up to ±1°C dp accuracy
• 0.5ºCdp (0.9ºFdp) repeatability
• 2-wire connection - linear 4 –20 mA signal
• Operating pressure range - up to 24 MPa (240 barg / 3480 psig)
• Operating range - 120 to -40°C dew point
• Moisture content ppmV
• Powered by any DC source from 12 to 28 V
Michell Instruments 1 97306 Issue 1.1, March 2016
3 PREPARATION FOR USE
On delivery, check that all the following standard components are present in the packing box:
Pura Transmitter Pura OEM Pura Premium
Calibration Certifi cate Calibration Certifi cate Calibration Certifi cate
Transmitter Connector Leak Test Certifi cate Leak Test Certifi cate
Connector Gasket Transmitter Connector Transmitter Connector
97306 User’s Manual Connector Gasket Connector Gasket
97306 User’s Manual 97306 User’s Manual
The recommended gas fl ow rate, when mounted in the system, is 1 to 10 Nl/min (2.1 to 21.2 scfh) (5 Nl/min (10.6 scfh) optimum).
97306 Issue 1.1, March 2016 2 Michell Instruments
4 SENSOR INSTALLATION
4.1 Installing the Sensor
The effective operation of the Pura I.S. Transmitter, in a fl owing gas environment, relies on the sensor being installed directly into the gas stream or by having a fully representative gas sample directed over the sensor measurement surface. Where possible avoid installing the sensor in a “dead” or unswept volume.
Michell Instruments recommends the use of Swagelok® retained gasket assemblies, containing silver plated, stainless steel ¼” VCR gaskets, when connecting the Pura I.S. Transmitter into a gas line. The distance between the inlet and outlet gas connection ports is set at a pitch of 120mm.
• Install the sealing gasket onto the VCR connections on either the Pura I.S. Transmitter or the connecting gas lines. Ensure that the Pura I.S. Transmitter is offered into the gas line with reference to the gas fl ow direction and the inlet port as indicated on the Pura I.S. Transmitter body.
• Tighten the female nut fi rmly - fi nger tight.
• While holding the Pura I.S. Transmitter stationary with a spanner/wrench, tighten the gas line nut 1/8 (one eighth) of a turn using a second spanner.
CAUTION: Over-tightening the nuts can cause
irrecoverable damage to the seals and seatings.
• Repeat this operation on the remaining gas connection port.
h
150mm
6”
¼” VCR
CONNECTION
g
h
20mm
0.8”
g
h
g
h
Ø35mm
1.4”
g
28mm
1.1”
g
g
120mm
20mm
0.8”
4.7”
g
h
h
g
2 OFF HOLES
M4 X 7 DEEP
Figure 4.1 Pura Premium & Pura OEM Dimensional Drawings
Michell Instruments 3 97306 Issue 1.1, March 2016
4.2 Pura Transmitter (Sensor Only Version) Installation
The Pura Transmitter (Sensor only version) is supplied fi tted with a protective guard. It is recommended that this guard be removed before installation, as, although clean, it is not manufactured to the same high level of surface fi nish as the sensor itself; its intended purpose is only to protect the measurement element of the sensor during handling.
Any use of the transmitter with the guard attached will not affect the sensor accuracy but may induce an extended measurement response and provide an opportunity for moisture entrapment points, creating potentially false measurement of the sample.
It is recommended that the guard remains fi tted until the transmitter is completely ready to be installed into the point of measurement. Once removed, the guard should be retained and reinstalled as protection, should the transmitter be removed from its point of installation e.g. for re-calibration.
CAUTION: Care should be exercised when withdrawing the guard
from the transmitter ensuring no contact is made with the sensor’s
measurement surface; doing so can affect the performance of the sensor.
Similarly, when inserting the sensor into the point of measurement,
avoid contact with the sensor measurement surface.
The Pura transmitter installation interface is made by way of a ½” VCR sealing face on the body of the transmitter. Effective installation can only be completed by mating this sealing face with a similar sealing face and via the use of a metal gasket.
Michell Instruments recommend the use of Swagelok® retained gasket assemblies, containing silver plated, stainless steel ½” VCR gaskets, when connecting the Pura into a measurement point. Gaskets are available from Michell, part no. 20904.
97306 Issue 1.1, March 2016 4 Michell Instruments
Installation Instructions
• Install the sealing gasket onto the transmitter body of the Pura.
• Tighten the joining female nut fi rmly fi nger tight.
• Hold the Pura transmitter stationary with a spanner/wrench and tighten the gas line nut 1/8 (one eighth) of a turn using a second spanner/wrench.
Pura Transmitter
CAUTION: Over tightening the nuts can cause
irrecoverable damage to the seals and seatings.
45mm
g
1.8”
h
h
105mm
4.1”
½” VCR
CONNECTION
h
h
h
27mm
1.1”
g
h
h
31mm
h
1.2”
6mm
0.23”
h
Figure 4.2 Pura Sensor Dimensional Drawing
Michell Instruments 5 97306 Issue 1.1, March 2016
4.3 Transmitter Cable
Cable connection to the Pura I.S. Transmitter is made via the removable connector.
When removing the central screw ensure that the small sealing
O-ring is retained on the screw and present during re-installation.
Removing the central screw enables the connector terminal block to be removed from the outer housing by using a small screwdriver to prise it off.
Figure 4.3 Terminal block Removal
When reinstalling the connector, and to ensure that full ingress protection is achieved, the securing screw must be tightened to a minimum torque setting of 3.4Nm (2.5 lbs/in) and the sensor cable used must have a minimum diameter of 4.6mm (0.2”).
97306 Issue 1.1, March 2016 6 Michell Instruments
4.4 Preparation of the Sensor Cable
It is essential that, to comply with Hazardous Area
Certifi cation of the product, the crimps supplied must be
fi tted onto any cable installed into the connector.
NOTE: Figures 4.4 to 4.7 shown below, should be followed in detail. The crimps should be applied such that there is no possibility of a conductor strand of a core becoming free.
When the crimp is made it should have a minimum of 2 positions of crimping. After the crimp is made it should be trimmed to a length of 5mm (see block ensure they are fully inserted, as shown in
Figure 4.4 Bare wires
Figure 4.6)
. When the crimps are installed into the connector terminal
Figure 4.7
Figure 4.5
, before tightening the terminal clamping screw.
Crimped wires
mm
10
When all wire connections are made, ensure that there is a minimum clearance distance and a minimum creepage distance in air of 2mm (0.8”) between each terminal.
Michell Instruments 7 97306 Issue 1.1, March 2016
Figure 4.6 Cut to 5mm
Figure 4.7 Connection to Pura I.S.TX
The diagram below shows the identity of the connector terminals:
Supply 4-20 mA
h
PIN 1
PIN 3
h
(GND)
Screen/Shield
Optional
Figure 4.8 Rear of connector terminal block
Always connect the 4-20 mA return signal to a suitable load (see
Figure 4.9)
transmitter may be damaged if allowed to operate for prolonged periods.
3
1
before the power is applied. Without this connection the
+
Max Load 250R @ 12V 500R @ 24V
Supply
12V Min
28V Max
GALVANIC ISOLATION INTERFACE
X
X
SAFE AREA
(+)
(-)
KFD2-STC4-Ex1 H KFD0-CS-Ex2.50p KFD2-CR-Ex1.20200 KFD2-CR-Ex1.30200 KFD0-CS-Ex1.50P MTL5041 MTL5040 MTL5541
+
-
4-20 mA
LOAD
+VS (20 - 35 V DC)
VS -
DEW-POINT TRANSMITTER CERTIFICATION No’s: Baseefa06ATEX0330X IECEx BAS 06.0090X
HAZARDOUS AREA
TRANSMITTER VERSION
TERMINAL NUMBER
3 1
X
(+) (RETURN)
X
Figure 4.9 Electrical Connections
97306 Issue 1.1, March 2016 8 Michell Instruments
4.5 Installation in Hazardous Areas
The Transmitter is certifi ed intrinsically safe for use in hazardous areas, by Notifi ed Body Baseefa Ltd. The instrument conforms to the ATEX & IECEx standards with certifi cation code:
II 1 G Ex ia IIC T4 (-20°C ≤ Ta ≤ +70°C)
The Transmitter is also certifi ed for use in Hazardous Areas by FM Approvals and CSA, with certifi cation code:
IS / I / 1 / ABCD / T4 Ta = +70°C, Entity Ex90385, IP66
Also see Appendix B for more information on certifi cation.
Before using the Transmitter in any hazardous environment, ensure that you are fully familiar with the relevant standards relating to the certifi cation of this instrument; and also with the further information relating to intrinsically safe apparatus to be found in standard EN 60079-14:1997 or equivalent, and up-to-date codes of practice in the country of installation.
The Transmitter must be installed using a specifi ed GALVANICALLY ISOLATED INTERFACE unit as shown in the system drawings in Appendix C
Installation of the Transmitter
Appendix C in order to comply with the Intrinsic Safety Certifi cation.
MUST
be as per the system drawings in
5 WHICH GASES TO MEASURE?
The Pura Hygrometer is suitable for measurement of the moisture content of a wide variety of gases. In general, if the gas (in conjunction with water vapor) is not corrosive to ceramics or base metals then it will be suitable for measurement by the Pura Hygrometer.
6 MAINTENANCE
Routine maintenance of the Pura I.S. Transmitter is confi ned to regular re-calibration. This work can only be done by exposure of the Pura I.S. Transmitter to sample gases of known moisture content. Calibration services traceable to the National Physical Laboratory (UK) and the National Institute of Standards and Technology (USA) are provided by Michell Instruments. In most applications, annual re-calibration ensures that the stated accuracy of the Pura I.S. Transmitter is maintained. Pura I.S. Transmitters are fully interchangeable and interchangeability is not affected by cable length; therefore, this method of maintaining calibration can be used for all Pura I.S. Transmitter installations. For applications where it is not required for continuous operation, re-calibration of the Pura I.S. Transmitter can be achieved by return of the complete instrument to Michell Instruments.
Michell Instruments 9 97306 Issue 1.1, March 2016
7 FAULT CONDITIONS
7.1 Sampling Hints
Be Sure the Sample is Representative of the Gas Under Test
The sample point should be as close to the critical measurement point as possible. Also, never sample from the bottom of a pipe (see sensing element.
Figure 7.1),
as entrained gas or particulate contamination may be drawn into the
Minimize Dead Space in Sample Lines
Dead space (see measurement errors, as a result of the trapped moisture being released into the passing sample and causing an increase in partial vapor pressure.
Remove Any Particulate Matter from the Sample
Particulate matter at high velocity can damage the sensing element and similarly at low velocity, they may “blind” the sensing element and reduce its response speed. If particulate, such as degraded desiccant, pipe scale or rust is present in the sample, use an in-line fi lter.
Figure 7.2)
Figure 7.1 Installation location
causes moisture entrapment points, increased system response times and
Figure 7.2 Indication of dead space
Use High Quality Sample Tube and Fittings
Michell Instruments recommends that, wherever possible, stainless steel tubing and fi ttings should be used. This is particularly important at low dew points since other materials have hygroscopic characteristics and adsorb moisture on the tube walls, slowing down response and, in extreme circumstances, giving false readings.
97306 Issue 1.1, March 2016 10 Michell Instruments
Appendix A
Technical Specifi cations
Michell Instruments 11 97306 Issue 1.1, March 2016
Appendix A Technical Specifi cations
Transmitter
Measurement Range (dew point) -120 to -40°C (-184 to -40°F) dew point
Accuracy (dew point) ±1°C from -40 up to -60°C
±2°C from -60 up to -100°C ±4°C from -100 up to -120°C (estimated)
Repeatability 0.5°C (0.9°F) dew point
Electrical Output/Input
Output Signal
Output
Output Range
Supply Voltage 12-28 V DC
Load Resistance Max 250 Ω @ 12 V (500 Ω @ 24 V)
Current Consumption 23 mA
Supply Voltage Infl uence
4-20 mA (2-wire connection, current source) User-confi gurable over range
Dew point, moisture content for ppmV, ppb
Dew point: -120 to -40°C (-184 to -40°F)
±0.005% RH/V
v
Operating Conditions
Operating Humidity 0–100% RH
Operating Temperature -40 to +60°C (-40 to +140°F)
Operating Pressure 24 MPa (240 barg / 3480 psig) max
Flow Rate
1 to 10 Nl/min (2.1 to 21.2 scfh) (5 Nl/min (10.6 scfh) optimum)
Mechanical Specifi cation
Hazardous Area Certifi cates ATEX - II 1 G Ex ia IIC T4 (-20°C ≤ Ta ≤ +70°C)
FM - IS / I / 1 / ABCD / T4 Ta = +70°C CSA - IS Class 1 Div 1 Groups ABCD T4 IECEx - Ex ia IIC T4 (-20°C ≤ Ta ≤ +70°C)
Ingress Protection IP66 in accordance with standard BS EN 60529:1992, and NEMA 4 in
protection accordance with standard NEMA 250-2003
Housing Material Stainless steel
Mounting Thread
Weight Premium and OEM versions: 450g (15.87oz)
Interchangeability Fully interchangeable transmitter
Electrical Connections Screw terminal
Fault Conditions (factory programmed)
Approved Galvanic Isolators
Approved Galvanic Isolators
¼” male VCR connection ½” male VCR connection
Pura Sensor version: 180g (6.34oz)
Condition Sensor fault Under-range dew point Over-range dew point
KFD2-CR-Ex1.20200 / KFD2-CR-Ex1.30200 KFD0-CS-Ex1.50P / KFD0-CS-Ex2.50P KFD2-STC4-Ex1 H / MTL5041, MTL5040, MTL5541
KFD2-CR-Ex1.20200 / KFD2-CR-Ex1.30200 KFD0-CS-Ex1.50P / KFD0-CS-Ex2.50P KFD2-STC4-Ex1 H / MTL5041, MTL5040, MTL5541
Output 23 mA 4 mA 20 mA
97306 Issue 1.1, March 2016 12 Michell Instruments
Appendix B
Hazardous Area Certifi cation
Michell Instruments 13 97306 Issue 1.1, March 2016
Appendix B Hazardous Area Certifi cation
NOTE: The PURA I.S. product incorporates the ATEX/IECEx/CSA/FM approved Easidew I.S. product and it is the Hazardous Area Certifi cation for the Easidew I.S. that provides the necessary approvals for the PURA I.S.
The Transmitter is certifi ed compliant to the ATEX Directive (94/9/EC), and IECEx for safe use within a hazardous area and has been assessed so by Baseefa Ltd (Notifi ed Body 1180).
This product uses the Easidew TX I.S. PCB assembly and therefore conforms to the Standards EN 60079­0:2004, EN60079-11:2007, IEC60079-0:2004, IEC60079-11:1999 and is attributed with a product certifi cation code:
II 1 G Ex ia IIC T4 (-20°C ≤ Ta ≤ +70°C)
ATEX Certifi cate Number : Baseefa06ATEX0330X ATEX System Certifi cate Number: Baseefa07Y0027 IEC Certifi cate Number: IECEx BAS 06.0090X
It is also certifi ed for use in Hazardous Areas by FM Approvals and CSA, with certifi cation code:
IS / I / 1 / ABCD / T4 Ta = +70°C, Entity Ex90385, IP66
FM Certifi cate Number: 3030238 CSA Certifi cate Number: 2013218
These certifi cates can be viewed or downloaded from our website (under Easidew TX I.S.) at: http://www. michell.com/accreditations
B1 Terminal Parameters
Ui = 28V Ii = 93mA Pi = 651mW Ci = 37nF Li = 0
B2 Special Conditions of Use
Wiring to the free socket must be made via crimped connectors such that all strands of the wires are retained securely by the crimp.
The plastic plug & socket provide potential for electrostatic discharge. Do not rub with a dry cloth and do not clean with solvents.
The Transmitter does not withstand the 500 V AC insulation test to frame. This must be taken into account when installing the equipment.
97306 Issue 1.1, March 2016 14 Michell Instruments
Appendix C
System Drawings
Michell Instruments 15 97306 Issue 1.1, March 2016
Appendix C System Drawings
NOTE: The Pura I.S. sensor uses the Easidew I.S. PCB assembly and therefore this certifi cation is valid for this instrument.
C1 Baseefa Approved System Drawing
97306 Issue 1.1, March 2016 16 Michell Instruments
C2 FM Approved System Drawing
Ex90385
EASIDEW I.S. DEWPOINT TRANSMITTER
FM SYSTEM DRAWING
A3
SHEET 1 OF 1
MICHELL INSTRUMENTS LTD. CAMBRIDGE ©
USED ON
SIGN
DATE
MOD. No.ISSUE
02 CERT ISS 23/12/08 IMA
DRAWING NUMBER
05 11081 06/04/11 IMA
SCALE
UNITS
DRAWING
+VS (20 TO 35V DC)
LOAD
4/20mA
+
KFD2-CR-Ex1.20200
BAS 00 ATEX 7164
000
VS -
+0.1
-
UNLESS OTHERWISE STATED
TOLERANCES:
3rd ANGLE
PROJECTION
KFD2-CR-Ex1.30200
BAS 00 ATEX 7164
000
KFD0-CS-Ex1.50P
BAS 98 ATEX 7343
000
MTL5041
BAS 01 ATEX 7155
000
MTL5040
BAS 98 ATEX 2227
000
KFDO-CS-Ex2.50P
BAS98ATEX7343

01 CERT ISS 16/07/07 IMA
03 CERT ISS 21/01/09 IMA
04 CERT ISS 24/03/09 IMA
NTS
mm
-0.0
ANGLES: ±0.5°
HOLE Ø:
5
FINISH
0 DEC. PLACE: ± 0.
1 DEC. PLACE: ± 0.2
2 DEC. PLACE: ± 0.1
DIMENSIONS:
MATERIAL
TITLE
(-)
TERMINAL NUMBER
EASIDEW
EASIDEW
(+)
APPROVEDCHECKED
DATEDATE
(+)
(RETURN)
3
2
4
PRO I.S.
1
3
I.S.
DEWPOINT
TRANSMITTER
CERTIFICATION No's:
Baseefa06ATEX0330X
IECEX BAS 06.0090X
WITHOUT THE CONSENT OF MICHELL INSTRUMENTS.
AND MUST NOT BE COPIED NOR DISCLOSED TO A THIRD PARTY
THIS DOCUMENT IS T HE P ROPERTY OF MICHELL INSTRUMENTS LTD.
10/03/06
MSB
DRAWN
DATE
4 Inches
100mm
ȍ
ȍ
ȍ
ȝ
ȝ
ȝ
54 H/
ȝ
435 H/
217 H/
33mH
4.2mH
12.6 mH
ȝ
ȝ
46 nF
613 nF
2.11 F
NON-HAZARDOUS LOCATION
TRANSMITTER VERSION
HAZARDOUS LOCATION
CLASS 1, DIVISION 1, GROUPS A,B,C, & D
DCAB
THE CAPACITANCE AND EITHER THE INDUCTANCE OR THE INDUCTANCE TO RESISTANCE RATIO
(L/R) OF THE CABLE MUST NOT EXCEED THE FOLLOWING VALUES:
THE ISOLATION OF THE SIGNAL WIRES WITH THE EASIDEW DISCONNECTED, MUST BE ABLE TO
GROUP CAPACITANCE INDUCTANCE OR L/R RATIO
( F) (mH) ( H/ohm)
WITHSTAND A 500V AC INSULATION TEST.
THE CAPACITANCE AND THE INDUCTANCE OF TEH HAZARDOUS AREA CABLES MUST NOT
USE, i.e. ANSI/ISARP12.6(INSTALLATION OF INTRINSICALLY SAFE SYSTEMS FOR HAZARDOUS
EXCEED THE VALUES GIVEN IN TABLE 1.
[CLASSIFIED] LOCATIONS) AND THE NATIONAL ELECTRICAL CODE ANSI/NFPA 70.
MICHELL INSTRUMENTS LTD. 01/11/05 DOF03
THE INSTALLATION MUST COMPLY WITH THE INSTALLATION PRACTICES OF THE COUNTRY OF
Michell Instruments 17 97306 Issue 1.1, March 2016
C3 CSA Approved System Drawing
97306 Issue 1.1, March 2016 18 Michell Instruments
Appendix D
List of Worldwide Michell
Instruments’ Offi ces
Michell Instruments 19 97306 Issue 1.1, March 2016
Appendix D List of Worldwide Michell Instruments’ Offi ces
Asia
Michell Asia PO Box 3149 Joondalup WA 6027 Australia Tel: +61 893 046587 E-mail: au.info@michell.com Web: www.michell.com/au
China
Michell Instruments (Shanghai) Ltd Room 1007, Qilai Building 889 Yishan Road Shanghai, 200233 P R China Tel: +86 21 5401 2255 Fax: +86 21 5401 2085 E-mail: cn.info@michell.com Web: www.michell.com/cn
Germany, Austria, Switzerland
Michell Instruments GmbH Industriestrasse 27 D-61381 Friedrichsdorf Germany Tel: +49 6172 591700 Fax: +49 6172 591799 E-mail: de.info@michell.com Web: www.michell.com/de
Benelux
Michell Instruments Benelux BV Krombraak 11 4906 CR Oosterhout The Netherlands Tel: +31 162 680 471 Fax: +31 162 437 566 E-mail: nl.info@michell.com Web:
www.michell.com/nl
France
Michell Instruments SAS 2-4, rue Jean Desparmet 69008 Lyon France Tel: +33 437 53 88 20 Fax: +33 437 53 88 21 E-mail: fr.info@michell.com Web: www.michell.com/fr
Italy
Michell Italia Srl Via Capecelatro, 10 20148 Milano Italy Tel: +39 02 4047194 Fax: + 39 02 40010565 E-mail: it.info@michell.com Web: www.michell.com/it
Japan
Michell Japan KK Musashino Center Building 1-19-18 Nakacho, Musashino Tokyo 180-0006 Japan Tel: +81 422 502600 Fax: +81 422 521700 E-mail: info@michell-japan.co.jp Web: www.michell-japan.co.jp
North America
Michell Instruments Inc 319 Newburyport Turnpike, Suite 207 Rowley, MA 01969 USA Tel: +01 978 484 0005 Fax: +01 978 843 7669 E-mail: us.info@michell.com Web: www.michell.com/us
Middle East
Michell Instruments Middle East P-06, #097 Sharjah Airport Int’l free zone Sharjah, United Arab Emirates Tel: +971 6 5575028 Fax: +971 6 5575029 E-mail: me.info@michell.com
United Kingdom
Michell Instruments Ltd 48 Lancaster Way Business Park Ely, CB6 3NW Cambridgeshire England Tel: +44 1353 658000 Fax: +44 1353 658199 E-mail: info@michell.com Web: www.michell.com/uk
97306 Issue 1.1, March 2016 20 Michell Instruments
NOTES:
Michell Instruments 21 97306 Issue 1.1, March 2016
http://www.michell.com
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