Michell Instruments Pura Operating Manual

Pura

Hazardous Area Transmitter 2-wire

User’s Manual

97306 Issue 1.1, March 2016

Michell Instruments

Inside front cover (blank)

Pura Hazardous Area Transmitter 2-Wire User’s Manual

I.S.

Pura Hazardous Area Transmitter

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.

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Pura Hazardous Area Transmitter 2-Wire User’s Manual

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

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Pura Hazardous Area Transmitter 2-Wire User’s Manual

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

Pura Hazardous Area Transmitter 2-Wire User’s Manual

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.

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Pura Hazardous Area Transmitter 2-Wire User’s Manual

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.

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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.

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Pura Hazardous Area Transmitter 2-Wire User’s Manual

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.

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Pura Hazardous Area Transmitter 2-Wire User’s Manual

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.

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