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Related Manuals for PST MICHELL Instrucments Easidew PRO I.S. for Gases
Summary of Contents for PST MICHELL Instrucments Easidew PRO I.S. for Gases
- Page 1 Easidew PRO I.S. Process Dew-Point Transmitter User Manual Easidew PRO I.S. Process Dewpoint Transmitter 97130 Issue 16.2 August 2021...
- Page 2 Please fill out the form(s) below for each instrument that has been purchased. Use this information when contacting Michell Instruments for service purposes. Product Name Order Code Serial Number Invoice Date Installation Location Tag Number Product Name Order Code Serial Number Invoice Date Installation Location Tag Number...
- Page 3 Easidew PRO I.S. For Michell Instruments' contact information please go to www.michell.com © 2021 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.
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Page 4: Table Of Contents
Easidew PRO I.S. User Manual Contents Safety ..........................vi Electrical Safety ......................vi Pressure Safety ......................vi Toxic Materials ......................vi Repair and Maintenance ....................vi Calibration ........................vi Safety Conformity ......................vi Abbreviations ........................vii Warnings .......................... viii INTRODUCTION ....................1 Features ......................1 INSTALLATION ....................2 Unpacking the Instrument ................... 2 Transmitter Mounting .................. - Page 5 Easidew PRO I.S. User Manual Appendices Appendix A Technical Specifications ................16 Dimensions ................. 17 Appendix B System Drawings ..................20 Baseefa Approved System Drawing ..........20 FM Approved System Drawing ............21 CSA Approved System Drawing ............. 22 Appendix C Hazardous Area Certification ..............
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Page 6: Safety
Easidew PRO I.S. User 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. -
Page 7: Abbreviations
Easidew PRO I.S. User Manual Abbreviations The following abbreviations are used in this manual: bara bar absolute barg pressure unit (=100 kP or 0.987 atm) gauge °C degrees Celsius °F degrees Fahrenheit direct current μm micro-meter lbf-ft pound foot Nl/min normal liters per minute milliampere megapascal... -
Page 8: Warnings
Easidew PRO I.S. User Manual Warnings The following general warning listed below is applicable to this instrument. It is 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. -
Page 9: Introduction
Easidew PRO I.S. User Manual INTRODUCTION INTRODUCTION The Easidew PRO I.S. has been manufactured, tested and calibrated to the highest available standards and should arrive in perfect working order, ready for installation into a gas or liquid measurement application. For questions about the instrument or how to install and operate it, contact your local representative. -
Page 10: Installation
Easidew PRO I.S. User Manual INSTALLATION INSTALLATION Unpacking the Instrument On delivery, please check that all the following standard components are present in the packing box: • Easidew PRO I.S. Transmitter • Bonded seal • Certificate of calibration • 3 off cable crimps •... -
Page 11: Wall Mount Bracket
Easidew PRO I.S. User Manual INSTALLATION After installation into the flow stream, the Easidew PRO I.S. housing (provided it is not mounted onto a wall bracket) may be positioned at any angle, through approximately 330º of rotation, to allow for the cable gland positioning. To position the housing - loosen the large clamping nut sufficiently to allow free rotation of the sensor assembly within the transmitter body. -
Page 12: Transmitter Mounting - Sample Block (Optional)
Easidew PRO I.S. User Manual INSTALLATION 2.2.2 Transmitter Mounting - Sample Block (Optional) The following procedure must be carried out by a qualified installation engineer. To mount the transmitter into the sensor block (preferred method), proceed as follows, refer to Figure 2. 1. -
Page 13: Transmitter Mounting - Direct Pipeline Connection
Easidew PRO I.S. User Manual INSTALLATION 2.2.3 Transmitter Mounting - Direct Pipeline Connection The transmitter may be directly mounted into a pipe or duct as shown in Figure 3. CAUTION: Do not mount the transmitter too close to the bottom of a bend where any condensate in the pipeline might collect and saturate the probe. -
Page 14: Transmitter Mounting - With Additional Process Connection Adapter
Easidew PRO I.S. User Manual INSTALLATION 2.2.4 Transmitter Mounting - With Additional Process Connection Adapter The following procedure must be carried out by a qualified installation engineer. To mount the adapter into the transmitter, proceed as follows (see Figure 4) : 1. -
Page 15: Preparation Of The Sensor Cable
Easidew PRO I.S. User Manual INSTALLATION Preparation of the Sensor Cable The sensor cable is NOT supplied as standard. The crimps supplied must be fitted onto any cable installed into the connector in order to comply with Hazardous Area Certification of the product. When making a cable assembly it is important that the cable is correctly terminated (see below). -
Page 16: Electrical Schematic
Easidew PRO I.S. User Manual INSTALLATION Electrical Schematic NOTE: The screen/shield should be connected for maximum performance and to avoid interference. Always connect the 4...20 mA return signal to a suitable load (see Figure 7) before the power is applied. Without this connection, the transmitter may be damaged if allowed to operate for prolonged periods. -
Page 17: Operation
Easidew PRO I.S. User Manual OPERATION OPERATION Measurement and Configuration The Easidew PRO I.S. can be configured to provide an output of 4...20 mA (2-wire connection) for the following: Dew point -110...+20°C (-166...+68°F) Moisture content in gas 0...3000 ppm Moisture content in liquids 0...3000 ppm The Easidew PRO I.S. -
Page 18: Figure 9 Indication Of Dead Space
Easidew PRO I.S. User Manual OPERATION Minimize Dead Space in Sample Lines: Dead space causes moisture entrapment points, increased system response times and measurement errors, as a result of the trapped moisture being released into the passing sample gas and causing an increase in partial vapor pressure. Deadspace Indication of Dead Space Figure 9... -
Page 19: Good Measurement Practice
Easidew PRO I.S. User Manual GOOD MEASUREMENT PRACTICE GOOD MEASUREMENT PRACTICE Ensuring reliable and accurate moisture measurements requires the correct sampling techniques, and a basic understanding of how water vapor behaves. This section aims to explain the common mistakes and how to avoid them. Sampling Materials –... - Page 20 Easidew PRO I.S. User Manual GOOD MEASUREMENT PRACTICE Temperature and Pressure effects As the temperature or pressure of the environment fluctuates, water molecules are adsorbed and desorbed from the internal surfaces of the sample tubing, causing small fluctuations in the measured dew point. Adsorption is the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved solid to the surface of a material, creating a film.
- Page 21 Easidew PRO I.S. User Manual GOOD MEASUREMENT PRACTICE • Accentuate adsorption and desorption effects on the gas passing through the sampling system. • Allow pockets of wet gas to remain undisturbed in a complex sampling system, which will then gradually be released into the sample flow. •...
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Page 22: Maintenance
Easidew PRO I.S. User Manual MAINTENANCE MAINTENANCE Calibration Routine maintenance of the Easidew I.S. is confined to regular re-calibration by exposure of the transmitter to sample gases of known moisture content to ensure that the stated accuracy is maintained. Calibration services traceable to the UK National Physical Laboratory (NPL) and the US National Institute of Standards and Technology (NIST) are provided by Michell Instruments. - Page 23 Easidew PRO I.S. User Manual APPENDIX A Appendix A Technical Specifications Michell Instruments...
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Page 24: Appendix A Technical Specifications
Easidew PRO I.S. User Manual APPENDIX A Appendix A Technical Specifications Product Easidew PRO I.S. for Gases Easidew PRO LQ I.S. for Liquids Performance Specifications -110...+20°C (-166...+68°F) dew point 0...1000 ppm capability – factory configured Measurement range -100...+20°C (-148...+68°F) dew point to customer-required range and application ±1°C (±1.8°F) dew point (+20...-60°C / +68...-76°F) Accuracy... -
Page 25: Dimensions
Easidew PRO I.S. User Manual APPENDIX A Dimensions Transmitter for Cable Gland Installation Transmitter with Wall Mount Bracket Michell Instruments... -
Page 26: Figure 12 Dimensions
Easidew PRO I.S. User Manual APPENDIX A Optional Sample Block Bonded Seal Dimensions Figure 12 97130 Issue 16.2, August 2021... - Page 27 Easidew PRO I.S. User Manual APPENDIX B Appendix B System Drawings Michell Instruments...
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Page 28: Appendix B System Drawings
Easidew PRO I.S. User Manual APPENDIX B Appendix B System Drawings Baseefa Approved System Drawing 97130 Issue 16.2, August 2021... -
Page 29: Fm Approved System Drawing
Easidew PRO I.S. User Manual APPENDIX B FM Approved System Drawing Michell Instruments... -
Page 30: Csa Approved System Drawing
Easidew PRO I.S. User Manual APPENDIX B CSA Approved System Drawing 97130 Issue 16.2, August 2021... - Page 31 Easidew PRO I.S. User Manual APPENDIX C Appendix C Hazardous Area Certification Michell Instruments...
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Page 32: Appendix C Hazardous Area Certification
Easidew PRO I.S. User Manual APPENDIX C Appendix C Hazardous Area Certification The Easidew PRO I.S is certified compliant to the ATEX Directive (2014/34/EU), the IECEx scheme and SI 2016 No. 1107 UKCA product marking scheme for use within Zone 0, 1 and 2 Hazardous Areas and has been assessed as being so by CML Bv Netherlands (Notified Body 2776) and EUROFINS CML UK (Approved Body 2503). -
Page 33: Terminal Parameters
Easidew PRO I.S. User Manual APPENDIX C Terminal Parameters = 28 V = 93 mA = 820 mW = 37 nF Special Conditions The wiring connections to the free socket must be made via crimped connectors in such a way that all the strands of the wire used are held securely by the crimp. - Page 34 Easidew PRO I.S. User Manual APPENDIX D Appendix D Quality, Recycling & Warranty Information 97130 Issue 16.2, August 2021...
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Page 35: Appendix D Quality, Recycling & Warranty Information
Easidew PRO I.S. User Manual APPENDIX D Appendix D Quality, Recycling & Warranty Information Michell Instruments is dedicated to complying to all relevant legislation and directives. Full information can be found on our website at: www.michell.com/compliance This page contains information on the following directives: •... - Page 36 Easidew PRO I.S. User Manual APPENDIX E Appendix E Return Document & Decontamination Declaration 97130 Issue 16.2, August 2021...
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Page 37: Appendix E Return Document & Decontamination Declaration
APPENDIX E Easidew PRO I.S. User Manual Appendix E Return Document & Decontamination Declaration Decontamination Certificate IMPORTANT NOTE: Please complete this form prior to this instrument, or any components, leaving your site and being returned to us, or, where applicable, prior to any work being carried out by a Michell engineer at your site. - Page 38 www.ProcessSensing.com http://www.michell.com...
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