Michell Instruments Easidew Portable HP User Manual

Easidew Portable

High Pressure Version

User’s Manual

97120 Issue 2.2

March 2016

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Easidew Portable HP

For Michell Instruments' contact information please go to

www.michell.com

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.

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

1 INTRODUCTION ................................................................................................1

2 INSTALLATION ..................................................................................................2

3 OPERATION ......................................................................................................4

3.1 General Operation .............................................................................................. 4

3.2 Measuring Dew Points Below -40°C (-40°F) .......................................................... 5

3.3 User Controls ..................................................................................................... 6

4 GOOD MEASUREMENT PRACTICE .......................................................................7

5 MAINTENANCE ................................................................................................11

5.1 Calibration ....................................................................................................... 11

5.2 Sensor / Battery Replacement ........................................................................... 11

5.3 Filter Cartridge Replacement ............................................................................. 13

5.4 Checking the Easidew Portable Electronics Calibration ......................................... 13

5.5 List of Spares ................................................................................................... 13

5.6 Troubleshooting ................................................................................................ 14

Figures

Figure 1 Swagelok® Fitting Instructions .....................................................................3

Figure 2 User Controls .............................................................................................6

Figure 3 2-Wire Connection - View Showing Rear of Connector Terminal Block ...........13

Appendices

Appendix A Technical Speciﬁ cations .............................................................................. 16

Appendix B EU Declaration of Conformity......................................................................18

Appendix C Quality, Recycling & Warranty Information ...................................................20

C.1 Recycling Policy ........................................................................... 20

C.2 WEEE And RoHS Compliance ........................................................ 20

C.3 Manufacturing Quality ..................................................................20

C.4 Calibration Facilities ..................................................................... 21

C.5 Return Policy ...............................................................................21

C.6 Warranty ..................................................................................... 21

Appendix D Decontamination Declaration ...................................................................... 23

iv 97120 Issue 2.2, March 2016

Easidew Portable HP 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 qualiﬁ ed personnel and 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. The instrument is powered by an internally mounted rechargeable battery. The input power supply voltage limits for the battery charger supplied with the instrument are 90 to 264 V AC, 47/63 Hz.

NOTE: No other battery charger unit, other than that supplied with the instrument should be used.

NOTE: Do not allow the battery to fully discharge.

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 300 barg (4350 psig). Refer to the Technical Speciﬁ cations in Appendix A.

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 www.michell.com for details of Michell Instruments’ worldwide ofﬁ ces contact information.

Calibration

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).

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.

Michell Instruments v

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) gauge

°C degrees Celsius

°F degrees Fahrenheit

dp dew point

ft feet

kg kilogram

lb pound

Easidew Portable HP User’s Manual

mA milliampere

m meter

mm millimeter

MPa megapascal

Nl/min normal liters per minute

psig pound(s) per square inch (gauge)

scfh standard cubic feet per hour

μm micrometer

Ω ohm

V Volts

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.

vi 97120 Issue 2.2, March 2016

Easidew Portable HP User’s Manual

1 INTRODUCTION

The Easidew Portable comprises an Easidew sensor ﬁ tted into a sample block with an integrated ﬁ lter cartridge, and Swagelok® tube couplings on the gas inlet and outlet. The measured dew point from the sensor is shown on the clear red LED display on the front panel of the instrument.

The Easidew Portable can be supplied with either °C or °F dew-point measurement units.

A 4-20 mA analog output is provided for connection to a chart recorder, data-logger or computer system, so dew-point trends can be analyzed over time.

The electronics are housed in a rugged Peli case, providing NEMA 6 protection when the lid is closed. The case is supplied with a lifetime guarantee.

INTRODUCTION

The Easidew Portable is powered by a rechargeable NiMH battery pack, giving between 12 and 16 hours of measurement time from a full charge. The instrument is delivered complete with a universal battery charger stored in the lid. It takes 16 hours to fully charge the battery pack, during which time the instrument can be switched on or off. The charger is suitable to connect power to the instrument indeﬁ nitely, but it is recommended to allow the battery pack to go through a full charge-discharge cycle at least once per month. A battery charge indicator on the instrument front panel warns when the battery is low.

All Michell Ceramic Moisture Sensors are subject to a 13-point calibration, where their performance is characterized against a fundamental reference hygrometer. This process, and subsequent quality testing, ensures that all sensors behave optimally before they are used in the 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.

Michell Instruments 1

INSTALLATION

2 INSTALLATION

On delivery, please check that all the following standard components are present in the packing box:

• Easidew Portable

• Swagelok

• Battery charger

• Mains lead

• 3 pole ¼” jack plug (inside lid)

• User manual

• Certiﬁ cate of calibration

6mm metering valve

6mm tube port adaptor

Easidew Portable HP User’s Manual

Before using the Easidew for the ﬁ rst time it is recommended that the battery pack is charged for a minimum of 12 hours.

The case has a pressure relief valve on the exterior below the handle. When closed, the case is completely sealed. If the instrument is taken through altitude changes, a

pressure differential will occur within the case. If this occurs: Before opening the lid,

open the black pressure relief valve by one turn (anti-clockwise) for a few seconds. This will equalize the pressures. When the case has been opened, ensure that the pressure relief valve has been fully closed.

The supplied Swagelok

port adaptor needs to be assembled before the metering valve

can be connected to the instrument. See below:

1. Slip the nut over the machined ferrule end of the port connector

2. Insert the port connector into the end connection and finger-tighten the nut

3. While holding the fitting body steady, tighten the nut one-quarter turn

Do not use the Swagelok gap inspection

gauge with machined ferrule ends.

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Easidew Portable HP User’s Manual

NOTE: Connect the machined ferrule end before connecting the tube adapter end

INSTALLATION

4. Insert the tube adapter until it rests firmly on the shoulder of the Swagelok

tube fitting body.

Finger-tighten the nut.

5. Mark the nut at the 6 o’clock position. While holding the fitting body steady, tighten the nut 1¼ turns to the 9 o’clock position.

Figure 1

Swagelok® Fitting Instructions

Michell Instruments 3

OPERATION

3 OPERATION

Easidew Portable HP User’s Manual

Maximum operating pressure is 300 barg (4350 psig).

It is important that both the gas ﬁ ttings and the Swagelok

Failure to do so will affect the instrument's pressure rating.

3.1 General Operation

To operate the Easidew Portable, follow these instructions:

1. Ensure that both the gas ﬁ ttings and the Swagelok® tube ﬁ ttings are fully tightened before use.

2. For measurement at line pressure, connect the supplied metering valve to the outlet of the instrument. For measurement at atmospheric pressure, connect the metering valve to the inlet.

3. Gas under test should be restricted to ﬂ ow rates between 1 and 5 Nl/min (2 and 10.6 scfh) and pressures from atmospheric to 30 MPa (300 barg / 4350 psig).

4. Connect the sample gas supply line to the instrument

tube ﬁ ttings are correctly tightened before use.

Gas In port.

5. Connect the sample gas vent line to the instrument

6. Switch the instrument on. The display will begin to change as the sensor responds to the applied dew point.

7. Allow the gas to ﬂ ow until the display shows a stable reading. Typically this would be around 15 to 30 minutes for spot checks at dew points of

-40°C (-40°F) and above.

8. Switch the unit off and disconnect the sample lines.

Before disconnecting the Easidew Portable from the gas line

it is essential to vent the system to atmospheric pressure,

otherwise severe injury could result.

NOTE: Filters are essential for potentially dirty/contaminated gases – the ﬁ tted ﬁ lter should be checked before and after use and replaced regularly - as required.

NOTE: The High Pressure version features two gas ﬁ ttings with 4mm oriﬁ ces that give no restriction and are engraved with a number 1. Atmospheric or line pressure measurement is achieved by changing the positioning of the metering valve as per the General Operation instructions above.

Gas Out port.

4 97120 Issue 2.2, March 2016

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Michell Instruments Easidew Portable HP User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual