Michell Instruments Easidew Online Operating Manual

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Easidew Online

Dew-Point Hygrometer

User’s Manual

Easidew Online

°Cdp

°Fdp

Hygrometer

97094 Issue 18.5

March 2016

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.

Instrument

Code

Serial Number

Invoice Date

Location of Instrument

Tag No

Instrument

Code

Serial Number

Invoice Date

Location of Instrument

Tag No

Instrument

Code

Serial Number

Invoice Date

Location of Instrument

Tag No

°Cdp

°Fdp

Easidew Online

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 Online User’s Manual

Contents

Safety ...............................................................................................................................vii

Electrical Safety ..........................................................................................................vii

Pressure Safety ........................................................................................................... vii

Toxic Materials ............................................................................................................vii

Repair and Maintenance ..............................................................................................vii

Calibration .................................................................................................................. vii

Safety Conformity .......................................................................................................vii

Abbreviations .................................................................................................................... viii

Warnings .......................................................................................................................... viii

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

1.1 Features ............................................................................................................ 2

2 INSTALLATION ..................................................................................................3

2.1 Unpacking the Instrument ................................................................................... 3

2.1.1 Unpacking the Easidew Transmitter ................................................................ 4

2.1.2 Unpacking the Monitor .................................................................................. 4

2.1.3 Accessories Pack ........................................................................................... 5

2.2 Easidew Online Components ............................................................................... 5

2.3 Easidew Transmitter ........................................................................................... 6

2.4 Monitor .............................................................................................................. 7

2.5 Monitor Panel Layout .......................................................................................... 7

2.6 Function Keys ..................................................................................................... 9

2.7 Mounting the Monitor ....................................................................................... 10

2.8 Electrical Connections ....................................................................................... 11

2.8.1 AC Power Supply Input ................................................................................ 12

2.8.2 DC Power Supply Input (Optional) ................................................................ 13

2.8.3 Preliminary System Test ............................................................................... 14

2.9 Mounting the Sample Block and Transmitter ....................................................... 14

2.9.1 Sample Block Gas Connections ..................................................................... 14

2.10 Preparation of the Transmitter cable .................................................................. 16

2.11 Cable Connection ............................................................................................. 17

2.12 Electrical Schematic .......................................................................................... 17

2.12.1 Electrical Boundaries ................................................................................... 18

2.13 Transmitter Mounting ........................................................................................ 18

2.13.1 Transmitter Mounting - Sample Block (Optional) ............................................ 19

2.13.2 Transmitter Mounting - Direct Pipeline Connection ......................................... 20

2.13.3 Transmitter Mounting - With Additional Process Connection Adapter .............. 21

2.13.4 Monitor Connection ..................................................................................... 22

2.14 Signal Output Connections ................................................................................ 23

3 OPERATION ....................................................................................................25

3.1 General Operational Information ....................................................................... 25

3.2 Preparation For Operation ................................................................................. 26

3.2.1 First Time Operation .................................................................................... 26

3.3 System Alarms ................................................................................................. 27

3.3.1 Alarm Switching Logic (Default) ................................................................... 27

3.3.2 Reversal of Alarm Switching Logic ................................................................ 28

3.3.3 Alarm Level Set-Up ..................................................................................... 30

3.3.4 Re-Transmitted Output Current Range Set-Up ............................................... 31

3.4 Operating Temperature / ppmV Range ............................................................... 32

3.4.1 Temperature Range Default ......................................................................... 32

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Easidew Online User’s Manual

3.4.2 Span and Unit Settings ............................................................................... 33

3.4.3 Alarm Set-Point Limit Conﬁ guration .............................................................. 34

3.4.4 Scale Units to ppmV Set-Up .......................................................................... 35

3.4.5 Monitor Limits When Unit Scaled to ppm

3.5 Digital Communication Parameters Set-Up .......................................................... 37

3.6 Monitor – Reading the Displayed Value Using Modbus RTU Over RS232 ................ 39

4 GOOD MEASUREMENT PRACTICE .....................................................................40

4.1 General Operational Guidelines ......................................................................... 41

4.2 Maintenance and Calibration ............................................................................ 42

4.2.1 Clean Monitor ............................................................................................ 42

4.3 Fault Conditions ............................................................................................... 43

.................................................... 36

Figures

Figure 1 Easidew Online Monitor and Transmitter .......................................................1

Figure 2 Unpacking Method ......................................................................................3

Figure 3 Transmitter Unpacking Method ....................................................................4

Figure 4 Monitor Unpacking Method ..........................................................................4

Figure 5 Accessories Pack ........................................................................................5

Figure 6 Easidew Online Components .......................................................................5

Figure 7 Easidew Transmitter ...................................................................................6

Figure 8 Monitor Panel Layout ..................................................................................7

Figure 9 Mounting the Monitor ...............................................................................10

Figure 10 AC Power Supply Connections ...................................................................12

Figure 11 DC Power Supply Connections ...................................................................13

Figure 12 Sample Block Gas Connections ..................................................................15

Figure 13 Connector Terminal Block Removal ............................................................16

Figure 14 Wiring Connections ...................................................................................16

Figure 15 Connector Installation ...............................................................................17

Figure 16 2-Wire Connection Diagram .......................................................................17

Figure 17 Maximum Load of Easidew - Including Cable Resistance ..............................18

Figure 18 Transmitter Mounting - Sensor Block ..........................................................19

Figure 19 Transmitter Mounting - Pipe or Duct...........................................................20

Figure 20 Transmitter Mounting with Adapter ...........................................................21

Figure 21 Transmitter Connections............................................................................22

Figure 22 Monitor Rear Panel Connections ................................................................23

Figure 23 Typical Display .........................................................................................26

Figure 24 Change Alarm Switching Logic ...................................................................29

Figure 25 Set-up Alarm Levels ..................................................................................30

Figure 26 Conﬁ gure Analog Output ...........................................................................31

Figure 27 Span and Unit Settings .............................................................................33

Figure 28 Set-up Alarm Set-Point Limits ....................................................................34

Figure 29 Set-up Monitor (to read ppmV) ...................................................................36

Figure 30 Set-up Data Communications Parameters ...................................................38

Figure 31 Installation Location .................................................................................41

Figure 32 Indication of Dead Space ..........................................................................41

Figure 33 Dimensions .............................................................................................47

Figure 34 RS232 Connections ...................................................................................49

Michell Instruments v

Easidew Online User’s Manual

Tables

Table 1 Monitor Front Panel Controls and Indicators ..................................................8

Table 2 Function Keys ..............................................................................................9

Table 3 Summary of Electrical Connections ............................................................. 24

Appendices

Appendix A Technical Speciﬁ cations .............................................................................. 45

A.1 Dimensions ................................................................................. 47

Appendix B RS232 Data Communications Port Connections (Optional) ............................ 49

Appendix C EC Declaration of Conformity ......................................................................51

Appendix D Quality, Recycling & Warranty Information ...................................................53

D.1 Pressure Equipment Directive (PED) 97/23/EC ...............................53

D.2 Recycling Policy .......................................................................... 53

D.3 WEEE Compliance ........................................................................ 53

D.4 RoHS2 Compliance ......................................................................54

D.5 Warranty ..................................................................................... 54

D.6 REACH Compliance ...................................................................... 55

D.7 Calibration Facilities ..................................................................... 55

D.8 Return Policy ............................................................................... 56

D.9 Manufacturing Quality .................................................................. 56

Appendix E Return Document & Decontamination Declaration ........................................ 58

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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 (SWP), for this instrument is 45 MPa (450 barg / 6500 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. For contact information visit the website at www.michell.com.

Calibration

The recommended calibration interval for this instrument is 12 months unless it is to be used in a mission-critical 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 and US directives.

Michell Instruments vii

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 bara bar absolute °C degrees Celsius °F degrees Fahrenheit DC direct current ft foot (feet) g gram(s) Hz Hertz lbf-ft pound force per foot Nl/min normal liters per minute m meter(s) mA milliampere max maximum min minute(s) mm millimeter(s) MPa megapascal (Pascals x10 m/sec meters per second Nm Newton meter ppm

parts per million (by volume)

RS232 serial data transmission standard Rx receive scfh standard cubic feet per hour scfs standard cubic feet per second SWP safe working pressure sec second(s) temp temperature V Volts Ω Ohms

Easidew Online User’s Manual

)

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.

Where this symbol appears in the following sections it is used

to indicate areas of potential risk of electric shock.

viii 97094 Issue 18.5, March 2016

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1 INTRODUCTION

The Easidew Online dew-point hygrometer is an instrument designed for the continuous online measurement of moisture content in non-corrosive gases, over an operational range of -100 to +20ºCdp (-148 to +68ºFdp).

The system comprises a programmable monitor conﬁ gured to accept a 4-20 mA current loop signal from an impedance-type dew-point temperature measurement transmitter. The span of the transmitter is set to cover the dew-point range -100 to +20ºCdp (-148 to +68ºFdp) at operating pressures up to 45 Mpa (450 barg / 6500 psig).

The monitor also has a re-transmission facility which buffers the transmitter output for onward transmission to other systems. The transmitter input to the monitor is conﬁ gured as a 4-20 mA current loop signal and the re-transmitted output can be conﬁ gured as either a 4-20 mA or a 0-20 mA current loop signal (ranged as per the input).

Two alarm outputs (high and low) are provided for connection to external systems. Alarm 1 provides a set of single pole make contacts and Alarm 2 provides a set of changeover contacts. Both sets are potential free and Alarm 1 contacts (single pole make) are rated at 250 V, 3 A and the Alarm 2 contacts (changeover) are rated at 250 V, 5 A.

INTRODUCTION

Figure 1

shows the monitor and the transmitter.

Easidew Online

°Cdp

°Fdp

Hygrometer

Figure 1

Easidew Online Monitor and Transmitter

Michell Instruments 1

INTRODUCTION

1.1 Features

The Easidew Online Hygrometer is simple to use and install, and can be conﬁ gured to meet speciﬁ c needs.

• 5/8”- 18 UNF process connections

Easidew Online User’s Manual

• Dew-point or ppm

• IP66 (NEMA 4) Sensor and IP65 (NEMA 12) Monitor (front panel only)

• Measurement range -100 to +20°C (-148 to +68°Fdp)

• Dual alarms

• Accuracy ±2°Cdp

• Clear and easy to read display

• Calibration certiﬁ cate (traceable to NPL and NIST)

moisture content

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2 INSTALLATION

It is essential that the connection of electrical and gas supplies

to this instrument be undertaken by competent personnel.

2.1 Unpacking the Instrument

The Easidew instruments and accessories are packed into a box and the method of unpacking is shown as follows:

INSTALLATION

Figure 2

Open the box and unpack carefully as follows. Save all the packing materials for the purpose of returning the instrument for re-calibration or any warranty claims. Note that the packing method may vary slightly in the U.S.

1. Remove the top packing (1)

2. Remove the dew-point transmitter box (3)

3. Remove the accessories pack (4)

4. Remove the monitor box (2)

Unpacking Method

Michell Instruments 3

INSTALLATION

2.1.1 Unpacking the Easidew Transmitter

NOTE: For environmental and operating conditions refer to Appendix A.

Easidew Online User’s Manual

Unpack the dew-point transmitter box as follows

Figure 3

Transmitter Unpacking Method

7653 421

1. Unscrew the cap (1) from the packing tube (6). Remove the foam block (2).

1. Remove the transmitter from the tube, complete with the body cover (4) and tip cover (5).

2. Remove the body cover (4) and the tip cover (5) but leave the blue plastic protective cover (3) in place until ready for installation.

NOTE: The transmitter sensing element is protected while in transit by a blue cover containing a small desiccant capsule. The connection pins are protected by a red plastic cap. None of these plastic items are required for the operation of the transmitter.

2.1.2 Unpacking the Monitor

The monitor (2) is packed, together with its ﬁ xing clamps (1) as shown below.

SMART OUTPUT Module System

Process Indicator

Figure 4

°Cdp

°Fdp

Monitor Unpacking Method

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2.1.3 Accessories Pack

The accessories pack is shown below.

INSTALLATION

Figure 5

Remove the screwdriver (1), the two leads (2) and (3) and the sample block (4) from the bag.

2.2 Easidew Online Components

On delivery please check that all the following standard components are present in the packing box. Report any shortages to Michell Instruments, immediately.

Easidew Online

Dew-Point Hygrometer

User’s Manual

Accessories Pack

dp C °

Fdp

Figure 6

97211 Issue 01, May 2010

Easidew Online Components

1. Monitor clamps (2 off)

2. Easidew Monitor

3. Transmitter cable assembly

4. Power cable

5. Screwdriver

6. User’s Manual

7. Calibration certiﬁ cate

8. Sample block

9. Easidew transmitter

Michell Instruments 5

INSTALLATION

2.3 Easidew Transmitter

NOTE: The transmitter’s sensing element is shown for illustration purposes only. Please keep the HDPE or SS guard ﬁ tted at all times, if possible.

Easidew Online User’s Manual

Figure 7

Sensing Element

e g d

g n

Process Connection

Hexagonal Nut

Transmitter Label

Transmitter Cover

Electrical Connector

Easidew Transmitter

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Easidew Online User’s Manual

2.4 Monitor

The controls and indicators associated with the Easidew Online are located on the front panel of the monitor.

Connections to the Easidew dew-point transmitter, the RS232 communications port and the external power supply are all made to the rear panel of the monitor.

INSTALLATION

Figure 8

shows the layout of these controls and Tables 1 and 2 describe their respective

operational functions.

Dew-point temperature units are displayed by one of the two LED’s located to the left of the display. On delivery, °Cdp is set-up as standard. If required, the units can be changed to °F. The method of conﬁ guring the unit for °F is described in Section 3.4.

Optionally, the instrument can be set-up to read dew point in parts per million (ppm range 0 to 3000 ppm

. This option requires the transmitter to be set-up for ppmV either

at the time of ordering or subsequently via Michell application software. NOTE: No

speciﬁ c ppm

LED indicator is provided on the monitor; ppmV is selected if

neither the °Cdp nor the °Fdp temperature indicators are illuminated.

Two temperature alarm indications are provided by two LEDs located on the right hand side of the display. These are marked

AL1 (low) and AL2 (high). Access to the alarm

relay contacts is provided on the rear panel. The connection for these alarm relay contacts is shown in Section 2.13.

NOTE: Every display is factory ﬁ tted with 2 alarm relays as standard.

2.5 Monitor Panel Layout

Easidew Online Hygrometer

Figure 8

Monitor Panel Layout

Michell Instruments 7

INSTALLATION

Item Description

°Fdp

Easidew Online User’s Manual

When illuminated, this LED indicates that the displayed dew-point reading is in degrees Fahrenheit.

Note: If neither the °Fdp or °Cdp LED is lit, ppm °Cdp

When illuminated, this LED indicates that the displayed dew-point reading is in degrees Celsius.

Note: if neither the °Cdp nor °Fdp LED is lit, ppm Main dew-point temperature display

Flashes to alternately indicate ErrL (error low) and temperature reading for low temperatures under-range (lower than -100°Cdp (-148°Fdp) or -129.9°Cdp (199.9°Fdp) for an open loop condition).

Flashes to alternately indicate temperature over-range.

AL1

When illuminated, this LED indicates that the dew-point temperature programmed for Alarm 1 has exceeded the programmed threshold. Under these conditions the alarm relay contacts associated with this alarm (normally open) will change state (close) and will remain closed until the dew-point temperature moves back within the programmed operational limit.

ErrH (error high) and temperature reading for high

is selected.

Alarm 1 is usually allocated to the Low alarm setting.

These relay contacts are rated at 250 V, 3 A and are connected as shown in Section 2.13.

Section 3.3.3 describes the setting up of AL1 trip points. AL2

When illuminated this LED indicates that the dew-point temperature programmed for Alarm 2 has exceeded the programmed threshold. Under these conditions the alarm relay changeover contacts associated with this alarm will change state and will remain in this state until the temperature moves back to within the programmed operational limit.

Alarm 2 is usually allocated to the High alarm setting.

These changeover relay contacts are rated at 250 V, 5 A and are connected as shown in Section 2.13.

Section 3.3.3 details the setting up of AL2 trip points.

The four function keys are used for setting up the

SET

monitor.

Table 2 describes the operation of the keys.

Table 1 Monitor Front Panel Controls and Indicators

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2.6 Function Keys

INSTALLATION

The function key panel is shown in

Table 2 describes the operation of the keys.

Item Description

Figure 8

P (Program) key

This key is used to access the programming menus and to select sub-menus within the list.

 Left arrow (decrement) key

This key is used to access sub-menus and, within individual submenus, to decrease the numeric value of the selected parameter.

 Right arrow (increment) key

This key is used to access sub-menus and, within individual submenus, to increase the numeric value of the selected parameter.

SET key

SET

Depending upon the context, this key is used to access the set value of the selected process ﬁ eld and as an Accept key for new parameter values.

Table 2 Function Keys

Michell Instruments 9

INSTALLATION

2.7 Mounting the Monitor

The monitor is designed for panel mounting and requires a panel cut-out of 46 x 92mm (1.8 x 3.6”). The recommended panel thickness is 2 to 5mm (0.08 to 0.2”).

Easidew Online User’s Manual

To mount the unit, proceed as follows (refer to

Figure 9):

1. Pass the monitor (1) through the front of the panel (2).

2. Support the monitor and insert the hook on the topside of the clamp (3) into the slot (4) located on top of the monitor casing.

3. Tighten the ﬁ xing screw (5) ﬁ nger tight, against the back of the panel.

4. Insert the hook on the second clamp (6) into the slot located on the underside of the instrument casing and tighten the ﬁ xing screw, ﬁ nger tight, against the back of the panel.

5. Ensure that the monitor is sitting ﬂ ush to the front of the panel (2) and tighten the ﬁ xing screws evenly against the back of the panel.

Caution: Do not overtighten the screws as this could cause

the case to crack.

Figure 9

Mounting the Monitor

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Easidew Online User’s Manual

2.8 Electrical Connections

Electrical connections to the Easidew Online system are as follows:

• AC power supply, 100 to 240 V AC (-15%, +10%), 50/60 Hz, 6 VA. A low voltage (24 V DC) option is also available.

• Transmitter current loop input, 4-20 mA (24 V DC loop power provided by monitor).

• Alarm 1 (Low), potential free contacts, single pole make. Contacts rated at 250 V, 5 A.

• Alarm 2 (High), potential free contacts, single pole changeover. Contacts rated at 250 V, 5 A.

• Re-transmitted input signal from the dew point transmitter 4-20 mA or 0-20 mA.

INSTALLATION

Michell Instruments 11

INSTALLATION

2.8.1 AC Power Supply Input

It is essential that the connection of electrical supplies to this

instrument be undertaken by competent personnel.

Easidew Online User’s Manual

Connect the AC power supply to the monitor as shown in

Figure 10

. Refer also to Table

3 which gives a summary of all the connections to the rear panel of the monitor.

Monitor

viewed from underneath

Figure 10

AC Power Supply Connections

1. Ensure that no power is connected to the mains lead.

2. Connect the blue (white - US standard) (neutral) lead (2) to terminal 23 on the rear panel of the monitor.

3. Connect the brown (black - US standard) (live) lead (3) to terminal 24 on the rear panel of the monitor.

4. Strip back the insulation on the free end of the power cable and wire to an appropriate power supply plug (brown lead to live supply terminal, blue lead to neutral supply terminal).

5. Check that the wiring has been completed correctly before connecting to a mains power supply.

12 97094 Issue 18.5, March 2016

Easidew Online User’s Manual

2.8.2 DC Power Supply Input (Optional)

INSTALLATION

Connect the DC power supply to the monitor as shown in

Figure 11

. Refer also to Table

3 which gives a summary of all the connections to the rear panel of the monitor.

Monitor

viewed from underneath

Figure 11

DC Power Supply Connections

1. Ensure that no power is connected to the mains lead.

2. Connect the blue (white - US standard) lead (2) to terminal 23 on the rear panel of the monitor.

3. Connect the brown (black - US standard) lead (3) to terminal 24 on the rear panel of the monitor.

4. Strip back the insulation on the free end of the power cable and wire to an appropriate power supply plug (brown lead to positive (+) supply terminal, blue lead to negative (-) supply terminal).

5. Check that the wiring has been completed correctly before connecting to a 24 V power supply.

Michell Instruments 13

INSTALLATION

2.8.3 Preliminary System Test

Before wiring the external signal outputs and the transmitter (current loop open), perform a system check as follows:

1. Switch off and disconnect the power supply.

Easidew Online User’s Manual

2. Connect to an AC or DC supply and switch the supply display should come on. Depending on the version of the monitor there are 2 types of sequential messages appearing on the display.

Type 1: - Digits sequentially tested, each in turn displaying the ﬁ gure followed by

Type 2: - Digits sequentially tested, each in turn displaying the ﬁ gure followed by

The ºCdp LED will, by default, also be illuminated and it is possible, that even though no alarms are currently set-up, one of the alarm LED’s may be illuminated.

NOTE: If the instrument is conﬁ gured to read ppmV neither of the temperature LED indicators will be lit.

3. If a loop calibrator is available, set it to Ext loop and connect to terminal 4 (positive) and terminal 3 (negative) of the process indicator.

4. Set the output current of the loop calibrator to 4 mA, the display should now be reading

rUO2 then oAor and Sbr

ruOO then oror and alternately ﬂ ashing ErrL and -129.9

-100.0.

ON. The monitor

5. Set the output current of the loop calibrator to 20 mA, the display should now be reading

6. Switch off and disconnect the loop calibrator.

Before wiring the external signal outputs and the transmitter, perform a system check as follows:

020.0.

2.9 Mounting the Sample Block and Transmitter

2.9.1 Sample Block Gas Connections

Sample gas connections are made to the Gas In and Gas Out ports on the sample block see

Figure 12.

for connection purposes the ports are interchangeable).

Normally, connections are made via stainless steel pipework, in which case the sensor block/transmitter assembly will be self supporting. If Teﬂ on tubing is used it may be necessary to support the assembly with a body clip.

Either port on the sample block may be used as the Gas Input port (i.e.

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Easidew Online User’s Manual

INSTALLATION

2345

Figure 12

Sample Block Gas Connections

Both the Input and Output gas connections are ⅛” NPT. It is recommended that both the Gas Input and Output connections are made made via ⅛” NPT to 6mm or ⅛” NPT to ¼” stainless steel tube adaptors (2 to 5 -

Figure 12)

. The method of connection to

the sensor block (6) is as follows:

NOTE: The following description relates to 6mm tube ﬁ xings. The sample block ports are both ⅛” NPT female process connections. Tube adaptors are not supplied with the equipment but can be obtained by contacting your local distributor or Michell Instruments (see www.michell.com for details).

1. Cut a suitable length of 6mm (¼” U.S.) stainless steel tubing (1) to the correct length and, if necessary, bend to shape to suit the location of the sensor block assembly. NOTE: To facilitate ease of connection to the

port, at least 75mm (3”) of the tubing coming out of the Gas In port must be straight.

2. Clean off any burrs or metal shavings adhering to the tubing.

3. Screw the ⅛” NPT (¼” U.S.) NPT Swagelok adaptor (5) into the ⅛” NPT (¼” U.S.) NPT inlet port in the sensor block (6) and tighten to a torque setting of 35 Nm (25 lbf-ft).

4. Pass the stainless steel tubing (1) through the locking nut (2). NOTE:

Threads towards the gas port.

5. Fit the back ferrule (3) over the stainless steel tubing (1) with the bevelled end facing the back of the front ferrule (4).

6. Place the front ferrule (4) over the stainless steel tubing (1), bevelled end towards the adaptor (5).

7. Push the stainless steel tubing (1) as far as it will go into the adaptor (5) and tighten up the locking nut (2) ﬁ nger tight.

8. Hold the adaptor (5) ﬂ ats with a spanner and tighten up the locking nut (2) to a torque setting of 35 Nm (25 lbf-ft) (1¼ turns). This action compresses the front ferrule (4) and back ferrule (3) onto the tubing to form a gas tight seal.

9. Connect up the other gas port as described in steps 1 to 8 above.

Michell Instruments 15

INSTALLATION

2.10 Preparation of the Transmitter cable

The transmitter cable is supplied as standard. A cable can be obtained by contacting your local distributor or Michell Instruments (see www.michell.com for details).

Cable connection to the Easidew transmitter is made via the removable connector. Removing the central screw enables the connector terminal block to be removed from the outer housing by using a small screwdriver to prise it clear.

O-ring

and washer

Easidew Online User’s Manual

Figure 13

Connector Terminal Block Removal

Caution: When removing the central screw ensure that the

small sealing O-ring and the washer are retained on the screw

and are present during re-installation.

For the transmitter to work properly, and to achieve maximum performance, the transmitter cable must be connected to the sensor connector as shown in the drawing below:

Note: The drawing below shows the identity of the connector terminals and wiring connections of the cable manufactured by Michell Instruments:

GREEN - 4-20 mA

RED + POWER BLUE - SCREEN

BRAID

GREEN - 4-20 mA

(SOURCE)

BLUE - SCREEN RED + POWER

SCALE 2:1

SHORT

AS POSSIBLE

+POWER

GREEN

SIGNAL (SOURCE)

RED

VIEW ON REAR

OF CONNECTOR

BRAID

BLUE

GND

Figure 14

SCREEN

GREEN

YELLOW

BLUE

RED

Wiring Connections

Always connect the 4-20 mA return signal to a suitable load

(see

Figure 14)

before the power is applied. Without this

connection, the transmitter may be damaged if allowed to

operate for prolonged periods.

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2.11 Cable Connection

When installing the connector, and to ensure that full ingress protection is achieved, the securing screw (with the O-ring and washer) must be tightened to a minimum torque setting of 3.4 Nm (2.5 ft-lbs). The transmitter cable used must be a minimum diameter of 4.6mm (0.2”).

INSTALLATION

Figure 15

Connector Installation

2.12 Electrical Schematic

NOTE: The screen/shield should be connected for maximum performance and to avoid interference.

Figure 16

Screen/ Shield

2-Wire Connection Diagram

Max Load 250R @ 12V 500R @ 24V

Supply 12V Min 28V Max

Michell Instruments 17

INSTALLATION

2.12.1 Electrical Boundaries

600

500

400

300

Resistance (ohms)

200

Easidew Online User’s Manual

100

12 14 16 18 20 22 24 26 28

Figure 17

2.13 Transmitter Mounting

Prior to installation of the transmitter, unscrew and remove the blue plastic cover and retain for future use. Take care to prevent any contamination of the sensor before installation (handle the transmitter by the main body only, avoiding contact with the sensor guard).

The Easidew can be mounted into either a ﬂ ow-through sensor sampling block (optional) or directly inserted into a pipe or duct and can be operated at pressures of up to 45 MPa (450 barg / 6500 psig) when ﬁ tted with the bonded seal provided.

Maximum Load of Easidew - Including Cable Resistance

Supply Voltage

The recommended gas ﬂ ow rate, when mounted in the optional sampling block, is 1 to 5 Nl/min (2.1 to 10.6 scfh). However, for direct insertion applications, gas ﬂ ow can be from static to 10 m/sec (32.8 fps).

NOTE: Pass the bonded seal over the 5/8”- 18 UNF mounting thread and assemble into the sampling location by hand using the wrench ﬂ ats only. DO NOT grip and twist the sensor cover when installing the sensor.

When installed, fully tighten using a wrench until the seal is fully compressed and to the following torque setting:

5/8” - 18 UNF 30.5 Nm (22.5 ft-lbs)

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2.13.1 Transmitter Mounting - Sample Block (Optional)

The following procedure must be carried out by a

qualiﬁ ed installation engineer.

To mount the transmitter into the sensor block (preferred method), proceed as follows, refer to

1. Ensure that the protective cover (2), and its desiccant capsule (2a), have

2. Fit the bonded seal (4) over the threaded part of the transmitter body.

Figure 18.

been removed from the tip of the transmitter.

WARNING: Under no circumstances should the sensor

guard be handled with the ﬁ ngers.

INSTALLATION

3. Screw the transmitter (1) into the sample block (3) and tighten to a minimum torque setting of 30.5 Nm (22.5 ft-lbs). NOTE: Use the ﬂ ats

of the hexagonal nut and not the sensor body.

4. Fit the transmitter cable/connector assembly to the plug located on the base of the transmitter and tighten the ﬁ xing screw (see Section 2.3).

Figure 18

Transmitter Mounting - Sensor Block

Michell Instruments 19

INSTALLATION

Easidew Online User’s Manual

2.13.2 Transmitter Mounting - Direct Pipeline Connection

The transmitter may be directly mounted into a pipe or duct, as shown in

Figure 19.

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.

The pipe or duct will require a thread to match the transmitter body thread. Fixing dimensions are shown in

Figure 19

. For circular pipework, to ensure the integrity of a gas tight seal, a mounting ﬂ ange will be required on the pipework in order to provide a ﬂ at surface to seal against.

The following procedure must be carried out by

competent personnel.

1. Ensure that the blue protective cover (and its desiccant capsule) has been

removed from the tip of the transmitter.

WARNING: Under no circumstances should the

sensor guard be handled with the ﬁ ngers.

2. Fit a bonded seal (2) over the threaded part of the transmitter body.

3. Screw the transmitter (3) into the pipe (1). Tighten enough to obtain a

gas tight seal. (Torque will depend upon the pipeline material.) NOTE: Do not overtighten or the thread on the pipework may be stripped.

Figure 19

48mm

Transmitter Mounting - Pipe or Duct

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2.13.3 Transmitter Mounting - With Additional Process Connection Adapter

INSTALLATION

To mount the adapter into the transmitter, proceed as follows (see

1. Ensure that the protective cover (2), and its desiccant capsule (2a), have

been removed from the tip of the transmitter.

2. Fit the bonded seal (3) over the threaded part of the transmitter body.

3. Screw the adapter (4) onto the threaded part of the transmitter and tighten

to 30.5 Nm (22.5 ft-lbs). NOTE: Use the ﬂ ats of the hexagonal nut and

not the sensor body.

4. Screw the transmitter (1) with its seal (3) and adapter (4) into the sample

block (see Section 2.4.1) or pipeline (see Section 2.4.2) and fully tighten using a wrench until the seal is fully compressed and to the following torque settings:

The following procedure must be carried out by a qualiﬁ ed

installation engineer.

Figure 20)

WARNING: Under no circumstances should the sensor guard be

handled with the ﬁ ngers.

G 1/2” BSP 56 Nm (41.3 ft-lbs)

3/4” - 16 UNF ` 40 Nm (29.5 ft-lbs)

1/2” NPT Use a suitable sealant e.g. PTFE tape using correct taping procedures

NOTE: Use the ﬂ ats of the hexagonal nut and not the sensor body.

Figure 20

Transmitter Mounting with Adapter

Michell Instruments 21

INSTALLATION

2.13.4 Monitor Connection

Connect the transmitter cable to the monitor as shown below:

Easidew Online User’s Manual

Monitor

viewed from above

Figure 21

Transmitter Connections

1. Connect the blue wire (2) of the transmitter cable to terminal 1 on the

monitor (1).

2. Connect the green wire (3) of the transmitter cable to terminal 3 on the

monitor.

3. Connect the red wire (4) of the transmitter cable to terminal 4 on the

monitor.

4. Check that the transmitter cable wiring has been completed correctly.

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2.14 Signal Output Connections

The Easidew Online system has three signal outputs, Alarm 1 (ALr1), Alarm 2 (ALr2) and the re-transmitted input signal (4-20 mA or 0-20 mA current loop signal depending upon instrument conﬁ guration).

INSTALLATION

Figure 22

the electrical connections to the monitor.

Alarm Outputs

Alarm 1 is a single pole make contact. Connect incoming signal lines to terminal 16 (common) and terminal 17 (normally open).

Alarm 2 comprises a set of changeover contacts. Connect incoming signal lines to terminal 9 (common), terminal 8 (normally open) and terminal 7 (normally closed).

shows the relevant rear panel connections. Table 3 shows a summary of all

The signal outputs will be connected to external systems that

can potentially inﬂ uence the operation of the process.

Alarm level signals could be at mains potential so it is essential

that, before connecting these signal lines, checks are made

to ensure that these inputs are not live and that it is safe to

handle them.

Figure 22

Monitor Rear Panel Connections

Michell Instruments 23

INSTALLATION

Re-transmission Output

The re-transmission output is current sourcing. Connect the positive output to terminal 14 and the negative output to terminal 13. Use appropriately colored wires eg, red (positive), black (negative).

Terminal Wire Color Signal Supply Information

1 Blue 0 V (GND)

3 Green 4-20 mA loop current Default 4-20 mA

Easidew Online User’s Manual

4Red

7 User deﬁ ned ALR2 (normally closed)

8 User deﬁ ned ALR2 (normally open)

9 User deﬁ ned ALR2 (common)

Transmitter loop supply

(+ve)

+24 V DC w.r.t. terminal 1

13 User deﬁ ned Current loop out (-ve) Default 4-20 mA

14 User deﬁ ned Current loop out (+ve) Default 4-20 mA

16 User deﬁ ned ALR1 (common)

17 User deﬁ ned ALR1 (normally open)

23 (AC Version) Blue Power in (neutral) 100 – 240 V, 50/60 Hz

24 (AC Version) Brown Power in (live) 100 – 240 V, 50/60 Hz

23 (DC Version) Blue Negative (-) 0 V

24 (DC Version) Brown Positive (+) 24 V

NOTE: There are no terminals in positions

5, 6, 10, 11, 12, 15, 18, 19, 20, 21 and 22

Table 3 Summary of Electrical Connections

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3 OPERATION

As supplied, the instrument is ready for operation and has been set-up with a set of default parameters. This section describes both the general operation of the instrument and the method of setting it up and changing the default parameters should this become necessary.

The default parameters are as follows:

• Span -100 to +20°Cdp (-148 to +68°Fdp) or 0 to 3000 ppmV

• Temperature units °Cdp

• Current loop input, 4-20 mA (7.5°C/mA or 13.5°F/mA)

• Re-transmission current loop output, 4-20 mA (7.5°C/mA or 13.5°F/mA)

• Alarm 1 set-point -20°Cdp (-4°Fdp)

• Alarm 2 set-point -40°Cdp (-40°Fdp)

• Data communications, Unit address 1, Baud rate 9600, Parity None, Stop bits 1

OPERATION

For the supplied dew-point transmitter, the span and current loop input setting should not be changed. The span will require changing if the instrument is to be ranged in °F, if a different transmitter is employed, if the user chooses to re-range the Easidew transmitter or if ppm

The instrument must also have been installed as detailed in Section 2 and connected to a sample gas supply that is representative of the process being monitored.

is selected.

3.1 General Operational Information

Operation of the Easidew Online is completely automatic and once set-up requires little or no operator intervention.

The dew-point transmitter is designed to operate in a ﬂ owing gas stream of between 1 and 5 Nl/min (2.1 and 10.6 scfh) when mounted in a sample block, at operating pressures up to a maximum of 45 MPa (450 barg / 6500 psig). Direct pipeline mounting requires 1 to 10m/sec (0 to 32.8fps) at pressures dependant on the type of material used (customer deﬁ ned).

The sample gas is taken into the sample block via the Gas In port and, in ﬂ owing through the sample block, comes into contact with the dew-point transmitter which, in turn, produces a current loop output signal proportional to the measured dew-point temperature. This output signal is converted to a real time analog dew-point temperature reading by the monitor.

If data logging is required, the monitor will need to be connected to a suitable host and temperature readings extracted via the RS232 interface.

The gas ﬂ ow through the sample block must be controlled outside the instrument, typically by means of a needle valve located in the sample gas input line.

Michell Instruments 25

OPERATION

3.2 Preparation For Operation

3.2.1 First Time Operation

To commence operation, proceed as follows:

1. Check that electrical power supply and the relevant analog and alarm outputs are connected to external systems as required and as described in Sections 2.8 and 2.13.

2. Check that the gas sample ﬂ ow rate through the sample block, or the pipeline in which the transmitter is located, is within the operational limits. (Adjust any external ﬂ ow control valves, located in the gas sample input line to the instrument to achieve required ﬂ ow rate.)

3. Switch on the power supply to the instrument. The instrument display will now come on, typically showing the default parameters and units as detailed in

The instrument is now operational and after a few seconds, in which all the segments of the display are tested, the monitor will display the measured dew-point temperature as a steady reading within the range -100 to +20°Cdp (-148 to +68°Fdp) or 0 to 3000 ppm degrees Celsius.

Figure 23

depending upon how the instrument has been set-up. The default setting is

Easidew Online User’s Manual

In the absence of any error indications the instrument will now be operational using the default parameters.

Easidew Online Hygrometer

Figure 23

If the display is ﬂ ashing, a fault condition exists. The following operational error conditions may be encountered:

Typical Display

ErrL - If the display is alternately ﬂ ashing (e.g.) ErrL and -103.3, this

indicates that the measured dew point is outside the lower operational limit (-100°Cdp/-148°Fdp).

If the display is alternately ﬂ ashing temperature in °F), this could be an indication that the input current loop to the monitor is open or that there may be a transmitter fault. Check that the transmitter is wired correctly as detailed in Sections 2.10 and 2.12.

ErrL and -129.9 (-199.9 if set-up to read

ErrH - If the display is alternately ﬂ ashing (e.g.) ErrH and 021.4, this

indicates that the measured dew point is outside the upper operational limit (+20°Cdp/+68°Fdp).

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3.3 System Alarms

3.3.1 Alarm Switching Logic (Default)

The Easidew Online system has two alarm outputs. As supplied, the default alarm setpoints and the alarm switching logic are as follows (the default temperature units are degrees Celsius):

OPERATION

Low Alarm - Alarm 1 (

High Alarm - Alarm 2 (

Alarm 1 (Low Alarm) is set-up to switch (gas drier) than the alarm set-point value. For the default set-points therefore, the default switching logic for these alarms is as follows:

Alarm 1 Temp < -20 Alarm 1 = ON

Temp > -20 Alarm 1 = OFF

Alarm 2 (High Alarm) is set to switch wetter) than its set-point value. For the default set-points therefore, the operation of this alarm would be as follows:

Alarm 2 Temp < -40 Alarm 2 = OFF

Temp > -40 Alarm 2 = ON

Depending upon the application, if required, it is possible to reverse the switching logic for either or both of the alarm channel outputs to provide the following alarm output conﬁ gurations:

AL1) set to -20°Cdp

AL2) set to -40°Cdp

ON when the temperature reading is lower

ON when the temperature reading is higher (gas

Alarm 1 Temp < -20 Alarm 1 = OFF

Temp > -20 Alarm 1 = ON

Alarm 2 Temp < -40 Alarm 2 = ON

Temp > -40 Alarm 2 = OFF

Section 3.3.2 describes the method for reversing the default switching logic and Section

3.3.3 describes the method for setting up individual alarm set-points.

Michell Instruments 27

OPERATION

3.3.2 Reversal of Alarm Switching Logic

As described in Section 3.3.1, the switching logic for the alarm channels may, if required, be individually reversed. Starting at the default state, the method of reversing the switching logic for both alarms is as follows:

Easidew Online User’s Manual

Figure 24

For Alarm 1:

1. Press the

2. Press the

3. Press the  key twice and the display will ﬂ ash between

4. Press the

5. Press the  key once to display a ﬂ ashing 4 digit number. For the Alarm

6. Press the  key once to change the display to 0000.

7. Press the

8. Either press the

shows the operational key sequence.

P key once and the display will read tECH.

SET key and the display will ﬂ ash between ConF and PinP.

SET key twice to display Alt1.

1 default setting this will be 0001.

SET key to accept the new value. The default setting for Alarm

1 is now reversed.

P key twice to return to the main display or press the P

key once followed by the  key to move to the from step 4 above.

ConF and Alr1.

Alr2 setting sequence

To reverse the switching logic for Alarm 2 ONLY, proceed as follows:

1. Press the

2. Press the

3. Press the  key three times and the display will ﬂ ash between

P key once and the display will read tECH.

SET key and the display will ﬂ ash between ConF and PinP.

ConF and

Alr2.

4. Press the

5. Press the  key once to display a ﬂ ashing 4 digit number. For the Alarm 2 default setting this will be 0000.

6. Press the  key once to change the display to 0001.

7. Press the

8. Press the Alarm 2 is now reversed.

SET key twice to display Alt2.

SET key to store the new value.

P key twice to return to the main display. The default setting for

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Main

Display

SET

OPERATION

SET

(Change Alarm 2 Switching Logic)

SET

Main

Display

Figure 24

Main

Display

Change Alarm Switching Logic

Michell Instruments 29

OPERATION

3.3.3 Alarm Level Set-Up

Easidew Online User’s Manual

The alarm set-point levels are set-up from the program menu as follows (to exit to the main display without

saving any new settings press the

key):

Figure 25

shows the operational key

sequence.

To set-up both alarm set-points:

1. Press the

SET key once, ALr1

will be displayed. (To set Alarm 2 only, press the

SET key twice

and follow the Alarm 2 branch instead).

2. Press the  key to display the ﬂ ashing current Alarm 1 setpoint (-20°C in this example).

P to exit

without

setting

Current

Value

Main display

Set x2 for Alarm 2 only

SET SET

Current

Value

New

Value

SET SET

P to exit if setting

Alarm 1 only

P to exit

without

setting

3. Use the  and  keys to set the required value (-25.5°C in this example).

4. Press the

SET key once to store

the new (or existing) value for Alarm 1 and to enter the set-

up menu for Alarm 2,

ALr2. (To

exit to the main display without changing Alarm 2 set-point

levels, press the

P key.)

5. Press the  key to display the ﬂ ashing current Alarm 2 setpoint (-40°C in this example).

6. Use the  and  keys to set the required value (-50°C in this example).

7. Press the

SET key once to store

the new value for Alarm 2. The display then returns to the main dew-point temperature display.

New

Value

Main Display

Figure 25

SET

Set-up Alarm Levels

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3.3.4 Re-Transmitted Output Current Range Set-Up

The Easidew Online is provided with an analog current loop output module which buffers and re-transmits the current loop input signal from the dew-point transmitter.

By default, the re-transmission output is set as a 4-20 mA current loop (to exactly follow the input signal, i.e. 4 mA in, 4 mA out).

For certain system processes, a 0-20 mA current loop output may be required. The set-up method is as follows:

OPERATION

SET

Figure 26

shows the operational key

sequence.

To change output from 4-20 mA to 0-20 mA:

1. Press the read

2. Press the ﬂ ash between

P key once, the display will

tECH.

SET key and the display will

ConF and PinP.

3. Press the  key and the display will ﬂ ash between

4. Press the

out1 and ConF.

SET key to display oAt1.

5. Press the  key once to display a ﬂ ashing 4 digit number. For the default setting (4-20 mA) this will be 0001.

6. Press the  key once to change the display to 0000. This selects the retransmission output to be 0-20 mA.

7. Press the

SET key to accept the new

value. The output current loop is now 0-20 mA. The display will ﬂ ash between

out1 and ConF.

8. Press the main dew-point temperature display.

P key once to return to the

Figure 26

SET

Default setting

0001=4 to 20mA

New setting

0000=0 to20mA

SET

Main

Display

Conﬁ gure Analog Output

Note: The transmitter current loop output signal is now scaled at 6 mA per °C input, while the transmitter input remains scaled at 7.5°C per mA.

Michell Instruments 31

OPERATION

3.4 Operating Temperature / ppmV Range

3.4.1 Temperature Range Default

The default temperature unit for the Easidew Online instrument is in degrees Celsius. This is indicated by the °Cdp LED indicator. The default settings associated with this temperature scale are as follows:

• Span -100 to +20°Cdp

• Lower and upper span limits -100 and +20 (display ﬂ ashes outside this range)

• Minimum alarm set-point -100°Cdp

• Maximum alarm set-point +20°Cdp

To range the instrument for °F, all the above parameters need to be changed to their Fahrenheit equivalent values (-148 and

+68°F). It is not sufﬁ cient just to change the °F/°C units.

Easidew Online User’s Manual

To change the range to Fahrenheit follow the procedures in Sections 3.4.2 and 3.4.3.

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3.4.2 Span and Unit Settings

To change the span and unit settings, proceed as follows. operational key sequence.

Figure 27

shows the

OPERATION

Main Display (°C)

1. Press the read

2. Press the display will read

P key once, the display will

tECH.

SET key six times and the

tPoL.

3. Press the  key and the display will ﬂ ash with the current minimum span limit (-100.0).

4. Use the  and  keys to set the required equivalent Fahrenheit value

(-148.0) and press the

SET key.

tPoH is then displayed.

5. Press the  key, the display will ﬂ ash the current maximum span limit (020.0).

6. Use the  and  keys to set the required equivalent Fahrenheit value

(068.0) and press the

SET key twice.

unit is then displayed.

7. Press the  key, the display will ﬂ ash the current unit (°C).

Set Span min

Set Span max

SET

Set alarm lower range limitSet alarm upper range limit

8. Use the  and  keys to set the required scale units (°F in this

example) and press the

SET key.

LoL is then displayed.

Main Display (°F)

9. Press the  key and the display will ﬂ ash with the current alarm lower range limit (-100.0).

Select required temp units

SET

10. Use the  and  keys to set the required equivalent Fahrenheit value

(-148) and press the

SET key. uPL is

then displayed.

Figure 27

Span and Unit Settings

11. Press the  key, the display will ﬂ ash the current alarm upper range limit (020.0).

12. Use the  and  keys to set the required equivalent Fahrenheit value (068.0) and press the

13. Press the

P key twice to return to the main menu.

SET key. PUoF is then displayed.

The maximum and minimum alarm level limits should now be changed to suit the new (Fahrenheit) unit values (refer to Section 3.4.3).

Michell Instruments 33

OPERATION

3.4.3 Alarm Set-Point Limit Conﬁ guration

The following procedure is used to set limits to which the alarm levels can be set (usually after reconﬁ guring the instrument’s range for Fahrenheit readings).

Easidew Online User’s Manual

Main display

Figure 28

1. Press the

shows the operational key sequence.

P key once, the display will read

tECH.

2. Press the ﬂ ash between

3. Press the  key four times and the display will ﬂ ash between

4. Press the

SET key once and the display will

ConF and PinP.

ConF and GEnn.

SET key once, the display will read

SU-L.

5. Press the  key once to display a ﬂ ashing 4 digit number representing the current minimum alarm level setting. (The default setting for the °C range is -100.0).

6. Use the  and  keys to set the required new value (e.g. -148.0).

7. Press the The display will read

SET key to accept the new value.

SU-u.

SET

Set alarm setpoint lower limitSet span alarm setpoint upper limit

SET

8. Press the  key once to display a ﬂ ashing 4 digit number representing the current maximum alarm level setting. (The default setting for the °C range is 020.0)

9. Use the  and  keys to set the required new value (e.g. 068.0).

10. Press the

SET key to accept the new value,

followed by the P key to return to the main display.

Figure 28

SET

Main display

Set-up Alarm Set-Point Limits

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3.4.4 Scale Units to ppmV Set-Up

To change the monitor to read parts per million by volume (ppmV) proceed as follows:

OPERATION

Figure 29

NOTE: The dew-point transmitter must be conﬁ gured to provide an output proportional to ppmV which can be set up at the time of order or by using the Michell application software. Contact Michell Instruments for information (for contact details see www.michell.com).

1. Press the

2. Press the

3. Press the  key, the display will ﬂ ash the current decimal point position

4. Press the  key to set 0000 on the display (no decimal point), and press

5. Press the  key, the display will ﬂ ash the current minimum span limit

6. Use the  and  keys to set the required ppmV minimum reading (0000)

7. Press the  key, the display will ﬂ ash the current maximum span limit

shows the operational key sequence.

P key once, the display will read tECH.

SET key four times and the display will read dPnt.

(0001).

SET key twice. tPoL is then displayed.

the

(-1000)

and press the

(0200).

SET key. tPoH is then displayed.

8. Use the  and  keys to set the required ppmV maximum reading (3000) and press the

9. Press the  key, the display will ﬂ ash the current unit (°C).

10. Press the  key three times to set the display reading to ‘_’ (ppmV) and press the

11. Press the  key, the display will ﬂ ash the current alarm lower range limit (-1000) (formerly -100.0 with no sign or decimal point showing).

12. Use the  and  keys to set the required alarm lower range limit (point where display starts to ﬂ ash) (0 or different value), and press the

uPL is then displayed.

key.

13. Press the  key, the display will ﬂ ash the current alarm upper range limit (0200) (formerly 020.0 with no decimal point showing).

14. Use the  and  keys to set the required alarm upper range limit (point where display starts to ﬂ ash) (3000 or different value), and press the

PUoF is now displayed.

key.

15. Press the

NOTE: Neither the °C nor the °F LED indicators on the front panel of the monitor are now lit.

SET key twice. unit is then displayed.

SET key. LoL is then displayed.

SET

P key twice and the main display, now reading ppmV will show.

On completion of the above procedure, appropriate alarm levels (relevant to the new ppmV scale) will need to be set-up (refer to Section 3.4.3).

Michell Instruments 35

OPERATION

SET

Easidew Online User’s Manual

Main Display, e.g. °C

Set decimal point (none)

SET

Set Span min, 0 ppm(v)

SET

Set Span max, 3000 ppm (v)

Select ppm(v)

SET

Set alarm lower range limit e.g. zeroSet alarm upper range limit e.g. 3000 ppm(v)

Main Display, ppm(v)

Figure 29

Set-up Monitor (to read ppmV)

3.4.5 Monitor Limits When Unit Scaled to ppmV

When unit is scaled to ppmV the display will read zero when the mA input signal is between 3 and 4 mA.

NOTE: On displays supplied before December 2011 the display will show negative ppmV values when the sensor input signal is between 3 and 4 mA.

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3.5 Digital Communication Parameters Set-Up

The default parameters for the Easidew Online instrument are as follows:

Default Address = 1, Baud rate = 9600, Parity = None, Stop bits = 1

To change these parameters, proceed as follows:

OPERATION

Figure 29

1. Press the

2. Press the

3. Press the  key ﬁ ve times, the display will ﬂ ash between

4. Press the

5. Press the  key once to display a ﬂ ashing 4 digit number. The default

6. Use the  and  keys to give the required new value (e.g. 0002). NOTE:

shows the operational key sequence.

P key once, the display will read tECH.

SET key and the display will ﬂ ash between ConF and PinP.

ConF and Corn.

Set-up instrument address

SET key once to display SAdr.

setting is 0001.

The range of possible addresses is between 1 and 247. Press the

SET key to accept the new value.

Set baud rate

bAud will now be displayed. Press the  key once to display a ﬂ ashing 4

7. digit number. The default setting is 0003, representing 9600 baud.

8. Use the  and  keys to give the required new value (the range is 0 to

4). 0 = 1200 baud, 1 = 2400 baud, 2 = 4800 baud, 3 = 9600 baud, 4 = 19200 baud. Press the

Set parity

Prty will now be displayed. Press the  key once to display a ﬂ ashing 4

9. digit number. The default setting is 0000, representing no parity (none).

10. Use the  and  keys to give the required new value (the range is 0 to

2). 0 = none, 1 = Odd, 2 = Even. Press the value.

Set number of stop bits

StPb will now be displayed. Press the  key once to display a ﬂ ashing 4

11. digit number. The default setting is 0000, representing 1 stop bit.

12. Use the  and  keys to give the required new value (the range is 0 - 1) 0 = 1 stop bit, 1= 2 stop bits.

13. Press the return to the main display.

SET key to accept the selected value, followed by the P key to

SET key to accept the selected value.

SET key to accept the selected

Michell Instruments 37

OPERATION

Easidew Online User’s Manual

Main display

Set Parity

SET

x 5

Range between

0001 and 0247

Set Address

Set baud

SET

Main Display (°F)

0000 = None 0001 = Odd 0002 = Even

Set number of

stop bits

0000 = 1 stop bit 0001 = 2 stop bits

SET

Figure 30

0=1200 1=2400

2=4800 3= 9600 4=19200

Set-up Data Communications Parameters

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OPERATION

3.6 Monitor – Reading the Displayed Value Using Modbus RTU Over RS232

It is possible to communicate with the online monitor using Modbus RTU over RS232. The monitor has a three pin serial port connection on the back – the required cable can be supplied by Michell (see Appendix B for set-up information).

To read the value displayed on the monitor a byte array must be created, containing the following bytes:

Instrument

Address

Command

Reg

Address

High

Reg

Address

Low

Number

of Reg

High

Number

of Reg

Low

LRC CRC

0x01 0x04 0x00 0x00 0x00 0x01 0x31 0xCA

Send this to the instrument with the correct delays between characters:

Baud Rate (bps) Min Delay (ms) Max Delay (ms)

1200 9.17 13.76 2400 4.59 6.88 4800 2.30 3.44 9600 1.15 1.72

19200 0.57 0.86

After a few seconds the instrument will send back the following response:

Instrument

Address

Command

Number of

bytes

Display

High

Display

Low

LRC CRC

0x01 0x03 0x02 0x00 0x67 (Varies) (Varies)

Data MSB * 256 + Data LSB = 0 *256 + 103 = 103

This code, written in c, can be used to convert the 103 into a real dew-point value or

10.3:

ﬂ oat ConvertToReal(int Value) //convert dew-point value to real dew-point result

{ﬂ oat result; //declaration

if (Value > 32767) Value=(Value-65536); //convert to negative number

result = (ﬂ oat)(Value/10.0); //divide number by 10 to convert to ﬂ oat

return result; //return real value}

Michell Instruments 39

MAINTENANCE

4 GOOD MEASUREMENT PRACTICE

The Easidew Online Hygrometer is designed to operate in a ﬂ owing gas stream and is suitable for the measurement of the moisture content of a wide variety of gases. In general, if the gas (in conjunction with water vapor) is not corrosive to ceramics or base metals then it will be suitable for measurement by the Easidew Online.

The transmitter is designed for operation with sample gas ﬂ ow rates of 1-5 Nl/min (sample block), 1-10 Nl/min (direct connection). Ideally, the ﬂ ow rate should be set-up between 4 and 6 Nl/min (8.5 and 12.7 scfh), (5 Nl/min (10.6 scfh) is the recommended optimum. Flow regulation is not provided within the Easidew Online system. Sample gas ﬂ ow must therefore be regulated outside the instrument, on the input side of the sample block by means of a precision needle valve. Always use high quality valve gear, coupling connections and pipework.

The transmitter will operate successfully at ﬂ ow rates within its operational range and it is important to ensure that the ﬂ ow rate through the sample block is high enough to avoid long time lags in response to humidity changes at the sample source.

Easidew Online User’s Manual

Avoid pressure gradients in the system by placing excessive ﬂ ow restriction on the output side of the sample block. In applications where the test gas has a very high ﬂ ow rate, an instrument by-pass arrangement is preferable to ﬂ ow restriction after the transmitter.

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4.1 General Operational Guidelines

General guidelines to be followed when setting-up a sampling system are as follows:

• Transmitter Positioning

The sample point should be as close to the critical measurement point as possible. Also, never sample from the bottom of a pipe as entrained liquids may be drawn into the sensing element.





MAINTENANCE

Figure 31

• Avoidance of Dead Spaces

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.

Installation Location



Deadspace

Figure 32

• Particulate and Oil Removal

Particulate matter at high velocity can damage the sensing element and similarly, at low velocity, they may ‘blind’ the sensing element and reduce its response speed. If particulate, such as degraded desiccant, pipe scale or rust is present in the sample gas, use an in-line ﬁ lter.

Indication of Dead Space

• High Quality Tube and Fittings

Michell Instruments recommends that, wherever possible, stainless steel tubing and ﬁ ttings should be used. This is particularly important at low dew points since other materials have hygroscopic characteristics and adsorb moisture on the tube walls, slowing down response and, in extreme circumstances, giving false readings. For temporary applications, or where stainless steel tubing is not practical, use high quality thick walled PTFE tubing.

Michell Instruments 41

MAINTENANCE

• Complexity avoidance (tee pieces, in-line couplings, etc.)

Sample pipework should, ideally, be specially designed for each application rather than adapted from that previously installed for another application. Dead space in sample lines increases response time by holding water molecules which are more slowly released to the passing gas sample.

• Sample Gas Selection

Generally, if the sample gas (in conjunction with water vapor) is not corrosive to base metals, it will be suitable for measurement by the Easidew Online system. Gases containing entrained solids should be ﬁ ltered before application to the sample block.

Care should be taken with gas mixtures containing potentially condensable components in addition to water vapor, e.g. oil, to ensure that only water vapor is present in the sample.

4.2 Maintenance and Calibration

Easidew Online User’s Manual

Routine maintenance of the Easidew Online Hygrometer is conﬁ ned to regular re- calibration. For most applications, annual re-calibration ensures that the stated accuracy of the Easidew Online Hygrometer is maintained.

Specialist calibration instrumentation is required to calibrate the transmitter and a true calibration can only be performed by exposure of the dew-point sensor to a reference gas of known dew point.

Calibration services are offered by Michell Instruments at their accredited calibration laboratories. All calibrations are traceable to national standards either via the National Physical Laboratory (UK) or the National Institute of Standards and Technology (USA).

The Easidew transmitter can be returned to Michell Instruments either directly or via the authorized distributor, for calibration at 13 points across the range -100 to +20°Cdp (-148 to +68°Fdp).

Alternatively, Michell Instruments can provide an exchange transmitter. Prior to recalibration, an exchange transmitter can be ordered from Michell Instruments or an authorized distributor.

Once the replacement transmitter and calibration certiﬁ cate have been received, the original transmitter can be disconnected from the sample line and the monitor and the replacement transmitter ﬁ tted in its place. Refer to Section 2.1.1. The original transmitter should be packed in its original packing (see Michell Instruments, either directly, or via their authorized agent.

Figure 3)

and returned to

Easidew transmitters are fully interchangeable and can be used with any Easidew Online monitor. Transmitter interchangeability is not affected by cable length.

4.2.1 Clean Monitor

The front panel of the monitor should be cleaned with a moist lint free cloth. Mild detergent may be used to remove any stubborn marks or stains but DO NOT use any type of solvent, e.g. acetone, which could damage the instrument.

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4.3 Fault Conditions

MAINTENANCE

Message

Displayed

ErrL

Sbr

ErrH

outR

rurC

Cause Action

Check power supply to transmitter. Check

Sensor failure

Instrument failure

Sensor failure or break in sensor connection

Gas is wetter than +20°Cdp Check gas source supply

Sensor contaminated Replace/re-calibrate transmitter

Input out of range

Reverse input connection

transmitter cable for continuity/damage. Rectify/replace cable

Refer to Michell or local representative for repair

Check transmitter cable for continuity/ damage. Rectify/replace cable

Check gas source supply. Re-calibrate/replace transmitter

Swap input connections from the transmitter to the monitor

Michell Instruments 43

APPENDIX A

Easidew Online User’s Manual

Appendix A

Technical Speciﬁ cations

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APPENDIX A

Appendix A Technical Speciﬁ cations

Monitor

Performance

Measurement Range (Dew Point)

Electrical Speciﬁ cations

Input Signal

Output Signal

Alr 1 Relay Alr 2 Relay Output

Analog Output Scaled Range

Power Connection

Supply Voltage

Over Voltage Category Display Temperature and Alarms

Indicators Load Resistance Current Consumption Power Connection

Transmitter cable

Operating Speciﬁ cations

Environmental Ratings

Operating Temperature 0 to +50°C (+32 to +122°F) 90% RH max (non condensing) Operating Mode Continuous

Mechanical Speciﬁ cations

Ingress Protection IP65 (NEMA 4X) at front, IP20 at rear Housing Material 1/8 DIN 43700 plastic housing Dimensions 96 X 48 x 86.5mm (3.8 x 1.9 x 3.4”) horizontal Mounting Panel mounting (cut out 92 x 46mm (3.6 x 1.8”)) Weight Approximately 210g (7.4oz)

-100 to +20°C (-148 to +68°F) dew point

4-20 mA input from Michell dew-point transmitter 4-20 mA (or –20mA) (2-wire connection, current source)

User conﬁ gurable over range Single pole make contact, rating 3 A @ 250 V AC Changeover contacts, rating 5 A @ 250 V AC Dew point or moisture content for ppm

Dew point: -100 to +20°C Moisture content in gas: 0-3000 ppm

Non-standard available upon request 2 wire, length 2m (6.6ft) 100 to 240 V AC (+10%, -15%), 50/60 Hz

(Optional 24 V DC) (-15%, +10%) 6W III, ﬁ xed installation category

20.3mm red 4 digit LED display

Red LED’s

Max 600 Ω AL1, AL2, °C, °F 60 mA max Copper braid screened cable; 4 core 7 / 0.2 (0.22mm²), stranded,

tinned copper conductors, PVC, insulated, Melinex taped, Black PVC outer. Max length 800m (2,624 ft)

Standard, indoor at an altitude of less than 2000 meters with noncondensing humidity

Michell Instruments 45

APPENDIX A

Easidew Online User’s Manual

Transmitter

Performance

Measurement Range (Dew Point) -100 to +20ºCdp (-148 to +68ºFdp) Accuracy (Dew Point) ±2ºCdp (±3.6ºFdp) Response Time 5 mins to T95 (dry to wet) Repeatability 0.5ºCdp (0.9ºFdp) Calibration 13 point calibration with traceable 7 point calibration certiﬁ cate

Electrical Speciﬁ cation

Output Signal

Output Dew point or moisture content for ppm

4-20 mA (2-wire connection current source) User-conﬁ gurable over range

Dew point: -100 to +20ºC (-148 to +68ºF) OR

Analog Output Scaled Range

Moisture content in gas: 0 - 3000 ppm

Non-standard available upon request

Supply Voltage 12 to 28 V DC

Load Resistance

Max 250 Ω @ 12 V

(500 Ω @ 24 V) Current Consumption 20 mA max CE Marked Certiﬁ ed

Operating Speciﬁ cations

Operating Temperature -40 to +60ºC (-40 to +140ºF) Operating Pressure 45 MPa (450 barg / 6500 psig) max

1 to 5 Nl/min (2.1 to 10.6 scfh) mounted in standard sampling Flow Rate

block;

0 to 10 m/sec (0 to 32.8 fps) direct insertion Temperature Coefﬁ cient Temperature compensated across operating temperature range

Mechanical Speciﬁ cations

Ingress Protection

IP66 in accordance with standard BS EN60529:1992

NEMA 4 in protection accordance with standard NEMA 250-2003 Housing Material 316 stainless steel

Dimensions

Sensor Guard

Process Connection & Material

Transmitter plus connector

L=132mm x ø45mm (5.19” x ø1.77”)

Standard: HDPE Guard < 10μm

Optional: 316 stainless steel sintered guard < 80μm

5/8” - 18 UNF

316 stainless steel Weight 150g (5.29oz) Interchangeability Fully interchangeable transmitter Electrical Connection Hirschmann GDS series (DIN 4350-C)

Diagnostic Conditions (factory programmed)

Digital Diagnostic Communications

Condition

Sensor fault

Under-range dew point

Over-range dew point

RS485, 2-wire Modbus RTU

Output

23 mA 4 mA 20 mA

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A.1 Dimensions

APPENDIX A

27 A/F

1/8” NPT

10mm

(0.39”)

132mm

(5.19”)

ø27mm

(1.06”)

10mm

(0.39”)

46mm (1.81”)

5/8” 18 UNF

ø25.4 x 2mm

(ø1 x 0.07”)

5/8” Bonded SealTransmitter

1/8” NPT

55.2mm

2.2”

5/8”-18 UNF

30mm

1.18”

ø30mm

ø1.18”

5/8”-18 UNF

96mm

(3.7”)

FRONT VIEW

Easidew Online Hygrometer

94mm

(3.7”)

48mm

(1.9”)

46mm

(1.8”)

Sample Block

10.5mm (0.41”)

76mm

(3”)

SIDE VIEW

44mm

(1.73”)

92mm

(3.6”)

OVERLAY

TOP VIEW

Monitor

Figure 33

Dimensions

Michell Instruments 47

APPENDIX B

Easidew Online User’s Manual

Appendix B

RS232 Data Communications

Port Connections (Optional)

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APPENDIX B

Appendix B RS232 Data Communications Port Connections (Optional)

The Easidew Online instrument has an RS232 port, situated on the rear panel of the monitor. This port enables remote access to the instrument’s conﬁ guration and the indicated dew-point temperature.

The method of connection is shown in

Figure 34

and the following items will be required

(these are not supplied with the Easidew system):

• Matching connector for monitor output port

• Screened RS232 communications cable (max length permitted 12m (39.4ft))

• 9-pin, D-Type RS232 connector

Tx Rx

GND

9 Pin D-Type Connector

Process Indicator Rear Panel

Figure 34

1. Strip both ends of the communications cable to expose the individual cable cores and the cable screen.

2. Trim off the cable screening at the monitor end.

3. Connect the Tx, Rx and ground (GND) cable cores to the monitor connector as shown.

4. On the 9-pin D-type PC connector, connect the Tx line to pin 3, the Rx line to Pin 2 and the GND connection to Pin 5. Connect the Screen to Pin 5 and/or the frame of the connector.

5. Check that the cable wiring has been completed correctly.

RS232 Connections

Michell Instruments 49

APPENDIX C

Easidew Online User’s Manual

Appendix C

EC Declaration of Conformity

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Appendix C EU Declaration of Conformity

APPENDIX C

Michell Instruments 51

APPENDIX D

Easidew Online User’s Manual

Appendix D

Quality, Recycling

& Warranty

Information

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APPENDIX D

Appendix D Quality, Recycling & Warranty Information

D.1 Pressure Equipment Directive (PED) 97/23/EC

The above Directive has been implemented in United Kingdom Law by the Pressure Equipment Regulations 1999.

The Regulations require that all pressure equipment and assemblies within the scope of the Pressure Equipment Directive must be safe when placed on the market or put into service.

Michell Instruments’ products have been assessed and, as referenced against the Classiﬁ cation Charts detailed in Annex II of the Directive, do not fall into the requirements for CE marking compliance with the Pressure Equipment Directive.

Article 3, paragraph 3 states that any product containing a pressurized ﬂ uid that does not qualify for compliance should, nevertheless, be constructed with Sound Engineering Practice (SEP).

Michell Instruments attests here that its products have been designed, manufactured & tested to assure safe operation, and in accordance with Sound Engineering Practices.

D.2 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.

To protect natural resources and to promote material reuse, please separate batteries from other types of waste and recycle responsibly. If batteries are not properly disposed of, these substances can cause harm to human health and the environment

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. For further information please see the following sections.

D.3 WEEE Compliance

Directive 2012/19/EU 4 July 2012 on Waste Electronic and Electrical Equipment (WEEE)

The Waste Electronic and Electrical Equipment (WEEE) Directive places rules upon European manufacturers of electrical and electronic equipment. The directives’ aim is to reduce the impact that electronic devices have on the environment.

Michell Instruments is in full compliance with the WEEE Directive and is registered with an approved recycler (Registration No. WEE/JB0235YW) and treats the requirement of the directive and the protection of the environment with the utmost importance. All Michell Instruments’ products are appropriately marked indicating their requirement for recycling.

It may be required to return certain instruments for treatment at the end of their working life.

Feb 2013

Michell Instruments 53

APPENDIX D

D.4 RoHS2 Compliance

Directive 2011/65/EU of the European Parliament and of the Council of 8 June 2011

The Restriction of Hazardous Substances (RoHS) Directive places rules upon European manufacturers of electrical and electronic equipment. The directives’ aim is to reduce the impact that electronic devices have on the environment.

According to the EC Directive 2002/95/EC, Michell Instruments’ products qualify as Category 9, Control and Monitoring Equipment. Under the 2002/95/EC Directive, Category 9 products are exempt from compliance with the Directive.

However, the careful design of all Michell Instruments’ products takes into consideration the requirements of the Directive and, wherever possible, compliance is achieved. All future products will be developed entirely using compliant materials. Furthermore, Michell Instruments is taking active steps to remove non-compliant materials and components from existing products wherever these may occur. Presently, none of the non-compliant materials are known to occur in Michell Instruments’ products.

The new Directive 2011/65/EU (RoHS2) entered into force on 21 July 2011 and required all Member States to transpose the provisions into their respective national laws by 2 January 2013.

Easidew Online User’s Manual

Under the provisions of the RoHS2 EU Directive 2011/65/EU (Article 3, [24]) deﬁ nes ‘Control and Monitoring Equipment’ speciﬁ cally as ‘monitoring and control instruments designed exclusively for industrial or professional use’.

RoHS2 EU Directive 2011/65/EU states the closing date for compliance of any Control and Monitoring Equipment product sold into the EU market place as 22nd July 2017.

However, the careful design policy of all Michell Instruments’ products continues to attain compliance in the shortest practical timescales and strives to ensure that less than 0.1% of total mass per product, of all non-compliant materials, appear within them. Michell Instruments continues to monitor suppliers and material sources to ensure that compliance of goods provided is maintained.

January 2013

D.5 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 be 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.

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D.6 REACH Compliance

Regulation (EC) No. 1907/2006 Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH)

Michell Instruments is a manufacturer of moisture measurement and gas analysis instrumentation and is a ‘downstream’ user of chemicals, as described by the EU Council Directive 76/769/EEC. The products we supply are not raw chemical products (goods).

Under normal and reasonably foreseeable circumstances of application, the goods supplied to you shall not contain or release any prohibited chemicals. No listed SVHC (Substances of Very High Concern) appear within products manufactured by Michell Instruments. Therefore the 0.1% mass per product, or total usage of 1 tonne/year, will never be exceeded. For these reasons we are neither required by obligation for registration nor for the creation of material safety data sheets (MSDS) for our products.

APPENDIX D

Our continued review of the SVHC Candidate List and compliant.

Michell Instruments maintains a hazardous material register in which MSDS data sheets are collated, and we will check that our suppliers will comply to REACH requirements for all materials and substances we use in the processes of our manufacturing.

In the unlikely event that any chemicals of concern appear in our products in quantities greater than

0.1% of total mass per product we will immediately inform you by correspondence according to the REACH Article 33 requirements. Our current appraisal is, however, that we do not expect or foresee such an incidence.

January 2013

D.7 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.

latest additions is to ensure we remain

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.

Michell Instruments 55

APPENDIX D

D.8 Return Policy

If a Michell Instruments’ product malfunctions within the warranty period, the following procedure must be completed:

1. Notify a Michell Instruments’ distributor, 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.

Easidew Online User’s Manual

D.9 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 (www.michell.com) if the product does not arrive in perfect working order.

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APPENDIX E

Appendix E

Return Document &

Decontamination Declaration

Michell Instruments 57

APPENDIX E

Easidew Online User’s Manual

Appendix E Return Document & Decontamination Declaration

'HFRQWDPLQDWLRQ&HUWL¿FDWH

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.

Instrument Serial Number Warranty Repair? YES NO Original PO # Company Name Contact Name

Address

Telephone # E-mail address Reason for Return /Description of Fault:

Has this equipment been exposed (internally or externally) to any of the following? Please circle (YES/NO) as applicable and provide details below

Biohazards YES NO Biological agents YES NO Hazardous chemicals YES NO Radioactive substances YES NO Other hazards YES NO Please provide details of any hazardous materials used with this equipment as indicated above (use continuation sheet

if necessary)

Your method of cleaning/decontamination

Has the equipment been cleaned and decontaminated? YES NOT NECESSARY Michell Instruments will not accept instruments that have been exposed to toxins, radio-activity or bio-hazardous

PDWHULDOV)RUPRVWDSSOLFDWLRQVLQYROYLQJVROYHQWV DFLGLFEDVLFÀDPPDEOHRUWR[LFJDVHVDVLPSOHSXUJH ZLWKGU\ JDVGHZSRLQW&RYHUKRXUVVKRXOGEHVXI¿FLHQWWRGHFRQWDPLQDWHWKHXQLWSULRUWRUHWXUQ

Work will not be carried out on any unit that does not have a completed decontamination declaration.

Decontamination Declaration

I declare that the information above is true and complete to the best of my knowledge, and it is safe for Michell personnel to service or repair the returned instrument.

Name (Print) Position

Signature Date

F0121, Issue 2, December 2011

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NOTES:

Michell Instruments 59

http://www.michell.com

Michell Instruments Easidew Online Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual