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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 2.3 October 2019...
- 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. Analyzer Code Serial Number Invoice Date Location of Instrument Tag Number Analyzer Code Serial Number Invoice Date...
- Page 3 © 2019 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 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 specified 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
A calibration certificate 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 certificate 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 adaptor end 4. Insert the tube adaptor 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 fittings and the Swagelok ® tube fittings 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 significantly lower levels of moisture present at dew points of this level, the response times of the sensor will be significantly 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 Charger Gas Out Gas In To measure line pressure atmospheric pressure Gas Out Gas In Filter Fitted Figure 2 User Controls Indicates the measured dew point in °C from -100 to +20 (-148... -
Page 13: Good Measurement Practice
Easidew Portable HP User’s 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. - Page 14 Easidew Portable HP User’s 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.
- Page 15 Easidew Portable HP User’s 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 16: 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 certificate bearing a seven-point calibration is issued with each sensor. - Page 17 Easidew Portable HP User’s Manual MAINTENANCE If the front panel prevents the connector from fitting 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).
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Page 18: 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 19: Troubleshooting
Easidew Portable HP User’s Manual MAINTENANCE Troubleshooting Symptom Cause Actions ErrI Sensor disconnected Check sensor cable is securely Display shows “ ” or sensor tile / sensor connected inside instrument. thermistor fault. Check instrument electronics with NOTE: This error is 4-20mA source. - Page 20 Easidew Portable HP User’s Manual APPENDIX A Appendix A Technical Specifications 97120 Issue 2.3, October 2019...
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Page 21: Appendix A Technical Specifications
Easidew Portable HP User’s Manual APPENDIX A Appendix A Technical Specifications 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 22 Easidew Portable HP User’s Manual APPENDIX B Appendix B Quality, Recycling & Warranty Information 97120 Issue 2.3, October 2019...
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Page 23: Appendix B Quality, Recycling & Warranty Information
Easidew Portable HP User’s Manual APPENDIX B Appendix B 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 24 Easidew Portable HP User’s Manual APPENDIX C Appendix C Decontamination Declaration 97120 Issue 2.3, October 2019...
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Page 25: Appendix C 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 materials. For most applications involving solvents, acidic, basic, flammable or toxic gases a simple purge with dry gas (dew point <-30°C) over 24 hours should be sufficient to decontaminate the unit prior to return. - Page 26 Easidew Portable HP User’s Manual NOTES 97120 Issue 2.3, October 2019...
- Page 27 Easidew Portable HP User’s Manual NOTES Michell Instruments...
- Page 28 http://www.michell.com...
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