Michell Instruments Easidew Portable HP User Manual
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Michell Instruments Easidew Portable HP User Manual

High pressure version
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Easidew Portable
High Pressure Version
User's Manual
97120 Issue 2.2
March 2016

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Summary of Contents for Michell Instruments Easidew Portable HP

  • Page 1 Easidew Portable High Pressure Version User’s Manual 97120 Issue 2.2 March 2016...
  • Page 2 Please fi ll out the form(s) below for each instrument that has been purchased. Use this information when contacting Michell Instruments for service purposes. Analyzer Code Serial Number Invoice Date Location of Instrument Tag No Analyzer Code Serial Number Invoice Date...
  • Page 3 © 2016 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.

  • Page 4: Table Of Contents

    Easidew Portable HP User’s Manual Contents Safety ..........................v Electrical Safety ......................v Pressure Safety ......................v Toxic Materials ......................v Repair and Maintenance ....................v Calibration ........................v Safety Conformity ......................v Abbreviations ........................vi Warnings ..........................vi INTRODUCTION ....................1 INSTALLATION ....................2 OPERATION ......................4...

  • Page 5: Safety

    The recommended calibration interval for the Easidew Portable is one year, unless otherwise specifi ed by Michell Instruments Ltd. The instrument should be returned to the manufacturer, Michell Instruments, or one of their accredited service agents for re-calibration (go to www.michell.com for contact information).

  • Page 6: Abbreviations

    Easidew Portable HP User’s Manual Abbreviations The following abbreviations are used in this manual: alternating current pressure unit (atmosphere) barg pressure unit (=100 kP or 0.987 atm) gauge °C degrees Celsius °F degrees Fahrenheit dew point feet kilogram pound milliampere...

  • Page 7: Introduction

    fi eld. A calibration certifi cate traceable to UK National Physical Laboratory (NPL) and the US National Institute of Standards and Technology (NIST) is provided from Michell Instruments' accredited laboratory. The certifi cate shows 7 points of the 13-point calibration.

  • Page 8: Installation

    Easidew Portable HP User’s Manual INSTALLATION INSTALLATION On delivery, please check that all the following standard components are present in the packing box: • Easidew Portable • Swagelok 6mm metering valve ® • Swagelok 6mm tube port adaptor ® •...

  • Page 9: Figure 1 Swagelok ® Fitting Instructions

    Easidew Portable HP User’s Manual INSTALLATION NOTE: Connect the machined ferrule end before connecting the tube adapter end 4. Insert the tube adapter until it rests firmly on ® the shoulder of the Swagelok tube fitting body. Finger-tighten the nut.

  • Page 10: Operation

    Easidew Portable HP User’s Manual OPERATION OPERATION Maximum operating pressure is 300 barg (4350 psig). It is important that both the gas fi ttings and the Swagelok ® tube fi ttings are correctly tightened before use. Failure to do so will affect the instrument's pressure rating.

  • Page 11: Measuring Dew Points Below -40°C (-40°F)

    Easidew Portable HP User’s Manual OPERATION Measuring Dew Points Below -40°C (-40°F) Due to the signifi cantly lower levels of moisture present at dew points of this level, the response times of the sensor will be signifi cantly increased. The table below offers an approximate guide to the times taken for the instrument to stabilize at a given dew point (from a starting point of 10°Cdp (50°Fdp) ambient):...

  • Page 12: User Controls

    Easidew Portable HP User’s Manual OPERATION User Controls EASIDEW Portable Hygrometer Power Fuse °Cdp 4-20 BATTERY Battery Battery Level Charger Gas Out Gas In Filter Fitted Figure 2 User Controls Indicates the measured dew point in °C from -100 to +20 (-148 to +68°F).

  • Page 13: Good Measurement Practice

    Easidew Portable HP User’s Manual GOOD MEASUREMENT PRACTICE GOOD MEASUREMENT PRACTICE Measurement of moisture content is a complex subject, but does not need to be diffi cult. This section aims to explain the common mistakes made in measurement situations, the causes of the problem, and how to avoid them.
  • Page 14 Easidew Portable HP User’s Manual GOOD MEASUREMENT PRACTICE Adsorption and Desorption Adsorption is the adhesion of atoms, ions, or molecules from a gas, liquid, or dissolved solid to the surface of a material, creating a fi lm. The rate of adsorption is increased at higher pressures and lower temperatures.
  • Page 15 Easidew Portable HP User’s Manual GOOD MEASUREMENT PRACTICE Sample Conditioning Sample conditioning is often necessary to avoid exposure of sensitive measuring components to liquids and other contaminants which may cause damage or affect the accuracy over time, depending on the measurement technology.
  • Page 16 Easidew Portable HP User’s Manual GOOD MEASUREMENT PRACTICE Flow Rates Theoretically fl ow rate has no direct effect on the measured moisture content, but in practice it can have unanticipated effects on response speed and accuracy. The optimal fl ow rate varies depending on the measurement technology, and can always be found in the instrument or sensor manual.

  • Page 17: Maintenance

    Service (UKAS) or US National Institute of Standards and Technology (NIST) standards laboratory. If these facilities do not exist it is recommended that the sensor is returned to the manufacturer, Michell Instruments, or an approved agent. A calibration certifi cate bearing a seven-point calibration is issued with each sensor.
  • Page 18 Easidew Portable HP User’s Manual MAINTENANCE If the front panel prevents the connector from fi tting onto the sensor, follow the instructions below: • Completely unscrew the cable gland on the GDSN connector to release the cable tension. • Remove the locking screw from the back of the connector (retaining the metal O-ring).

  • Page 19: Filter Cartridge Replacement

    At 4 mA the display should show -100.0°Cdp ±0.5°C (-148°Fdp ±0.9°F) At 20 mA the display should show +20.0°Cdp ±0.5°C ( +68°Fdp ±0.9°F) If the displayed values are outside of this range, please contact Michell Instruments' Service Department. List of Spares...

  • Page 20: Troubleshooting

    Easidew Portable HP User’s Manual MAINTENANCE Troubleshooting Symptom Cause Actions Sensor disconnected Check sensor cable is securely Display shows “ ErrI ” or sensor tile / sensor connected inside instrument. thermistor fault. Check instrument electronics with NOTE: This error is 4-20mA source.
  • Page 21 Easidew Portable HP User’s Manual APPENDIX A Appendix A Technical Specifi cations Michell Instruments...

  • Page 22: Appendix A Technical Specifi Cations

    Easidew Portable HP User’s Manual APPENDIX A Appendix A Technical Specifi cations Performance Measurement Technology Impedance Measurement Ranges Spot Checks -40 to +20°Cdp (-40 to +68°Fdp) Online -100 to -40°Cdp (-148 to -40°Fdp) Accuracy ±2°Cdp (±3.6°Fdp) Run time 12 - 16 hours...
  • Page 23 Easidew Portable HP User’s Manual APPENDIX B Appendix B EC Declaration of Conformity Michell Instruments...

  • Page 24: Appendix Beu Declaration Of Conformity

    Easidew Portable HP User’s Manual APPENDIX B Appendix B EU Declaration of Conformity 97120 Issue 2.2, March 2016...
  • Page 25 Easidew Portable HP User’s Manual APPENDIX C Appendix C Quality, Recycling & Warranty Information Michell Instruments...

  • Page 26: Appendix C Quality, Recycling & Warranty Information

    Quality, Recycling & Warranty Information 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.

  • Page 27: Calibration Facilities

    Easidew Portable HP User’s Manual APPENDIX C 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).
  • Page 28 Easidew Portable HP User’s Manual APPENDIX D Appendix D Decontamination Declaration 97120 Issue 2.2, March 2016...

  • Page 29: Appendix D Decontamination Declaration

    Has the equipment been cleaned and decontaminated? NOT NECESSARY Michell Instruments will not accept instruments that have been exposed to toxins, radio-activity or bio-hazardous Work will not be carried out on any unit that does not have a completed decontamination declaration.
  • Page 30 Easidew Portable HP User’s Manual NOTES 97120 Issue 2.2, March 2016...
  • Page 31 Easidew Portable HP User’s Manual NOTES Michell Instruments...
  • Page 32 http://www.michell.com...

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