Michell Instruments Easidew PRO XP User manual

Easidew PRO XP
Moisture Transmitter
User’s Manual
97442 Issue 5
May 2018

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© 2018 Michell Instruments
This document is the property of Michell Instruments Ltd. and may not be copied or
otherwise reproduced, communicated in any way to third parties, nor stored in any Data
Processing System without the express written authorization of Michell Instruments Ltd.
Easidew PRO XP
For Michell Instruments' contact information please go to
www.michell.com

Easidew PRO XP User’s Manual
iv 97442 Issue 5, May 2018
1 INTRODUCTION ................................................................................................1
1.1 Features ............................................................................................................ 1
2 INSTALLATION ..................................................................................................2
2.1 Unpacking the Instrument................................................................................... 2
2.1.1 Wall Mounting .............................................................................................. 4
2.1.2 Pipe Mounting............................................................................................... 6
2.2 Gas Media Process Connection ........................................................................... 7
2.3 Liquid Media Process Connection ......................................................................... 8
2.3.1 Sample Block (Optional) ............................................................................... 9
2.3.2 Orientating the display ................................................................................ 10
2.4 Hazardous Area Safety...................................................................................... 11
2.5 Electrical Safety ............................................................................................... 12
2.5.1 Equipment Ratings and Installation Details.................................................... 12
2.6 Pressure Safety ................................................................................................ 14
2.7 Electrical Schematic .......................................................................................... 14
2.7.1 Easidew PRO XP EX1 (Non-Display).............................................................. 14
2.7.2 Easidew PRO XP EX2 (Display).................................................................... 15
2.7.3 Electrical Boundaries ................................................................................... 15
2.8 Preparation of the Sensor Cable ........................................................................ 16
2.8.1 Terminal Block Connection - Easidew PRO XP EX1 (Non-Display) .................... 16
2.8.2 Terminal Block Connection - Easidew PRO XP EX2 (Display) ........................... 17
3 OPERATION ....................................................................................................19
3.1 Measurement and Configuration ........................................................................ 19
3.2 Sampling Hints ................................................................................................. 20
4 MAINTENANCE ................................................................................................21
4.1 Calibration ....................................................................................................... 21
4.2 Sensor Guard Replacement ............................................................................... 21
4.3 Display Replacement......................................................................................... 22
4.4 O-Ring Replacement......................................................................................... 23
Contents
Safety ............................................................................................................................... vii
Toxic Materials ............................................................................................................ vii
Repair and Maintenance ..............................................................................................vii
Calibration..................................................................................................................vii
Safety Conformity .......................................................................................................vii
Abbreviations.................................................................................................................... viii

Easidew PRO XP User’s Manual
Michell Instruments v
Figures
Figure 1 Sensor Cap Removal...................................................................................2
Figure 2 Dimensions Easidew PRO XP EX1 (Non-Display) - Wall Mounting....................3
Figure 3 Dimensions Easidew PRO XP EX2 (Display) - Wall Mounting...........................4
Figure 4 Transmitter Mounting - Pipe or Duct.............................................................5
Figure 5 Dimensions Easidew PRO XP EX1 (Non-Display) - Pipe or Duct .....................5
Figure 6 Dimensions Easidew PRO XP EX2 (Display) - Pipe or Duct ............................5
Figure 7 Transmitter Direct Mounting ........................................................................6
Figure 8 Transmitter Mounting - Sample Block ...........................................................8
Figure 9 Outline Dimensions - Sample Block ..............................................................8
Figure 10 Orientating the display................................................................................9
Figure 11 Electrical Schematic - Easidew PRO XP EX1 (Non-Display) ...........................13
Figure 12 Electrical Schematic - Easidew PRO XP EX2 (Display) ..................................14
Figure 13 Maximum Load of Easidew PRO XP - Including Cable Resistance.................14
Figure 14 Wire and Crimp Details .............................................................................15
Figure 15 Terminal Block Connection - Easidew PRO XP EX1 (Non-Display) .................15
Figure 16 Grub Screw .............................................................................................16
Figure 17 Terminal Block Mounting - Easidew PRO XP EX2 (Display) ...........................16
Figure 18 Grub Screw .............................................................................................17
Figure 19 Indication of Dead Space ..........................................................................19
Figure 20 Replacement of Sensor Guard ...................................................................20

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vi 97442 Issue 5, May 2018
Appendices
Appendix A Technical Specifications.............................................................................. 25
Appendix B Hazardous Area Certification ...................................................................... 28
B.1 Product Standards ....................................................................... 28
B.2 Product Certification .................................................................... 28
B.3 Global Certificates/Approvals ........................................................ 29
B.4 Special Conditions........................................................................ 29
B.5 Maintenance and Installation ........................................................ 29
Appendix C Fully Programmable Loop Powered 4-Digit LED Display Meter ....................... 31
C.1 Display Meter Parameter Limits..................................................... 31
C.2 Display Meter Operating Range.....................................................31
C.3 Display Meter View ...................................................................... 31
C.4 Re-Configuration Steps................................................................. 32
C.5 Moisture Scaling Label ................................................................. 33
C.6 Technical Specifications - EX2 LED Display..................................... 34
Appendix D Quality, Recycling & Warranty Information................................................... 36
Appendix E Return Document & Decontamination Declaration........................................ 38

Easidew PRO XP User’s Manual
Michell Instruments vii
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
qualified personnel and good engineering practice for all procedures in this manual.
Where this symbol appears in the following sections it is used
to indicate areas where potentially hazardous operations need
to be carried out and where particular attention to personal and
personnel safety must be observed.
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.
Long exposure to, or breathing of the calibration gases, may be dangerous.
Repair and Maintenance
The instrument must be maintained either by the manufacturer or an accredited service agent. For
Michell Instruments’ worldwide offices contact information go to www.michell.com.
Calibration
Prior to shipment, the analyzer undergoes stringent factory calibration to traceable standards. Due
to the inherent stability of the instrument, regular field calibration should not be required under
controlled operating conditions. However, Michell Instruments recommends that a calibration be
considered at intervals of every 12 months of the instrument’s life.
Michell Instruments can provide a fully traceable factory calibration service. Please contact your local
Michell Instruments’ office or representative for further details (www.michell.com).
Otherwise the analyzer should perform reliably for many years with just basic maintenance and
housekeeping.
Safety Conformity
This product carries the CE mark and meets the requirements of relevant European safety directives.

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Abbreviations
The following abbreviations are used in this manual:
A ampere
A/F across flats
barg pressure unit (=100 kP or 0.987 atm) gauge
°C degrees Celsius
°F degrees Fahrenheit
dp dew point
DC direct current
EU European Union
fps feet per second
HDPE high-density polyethylene
ins inches
I/O Input/Output
ISO International Organization for Standardization
K Kelvin unit of temperature measurement
lb/MMSCF pounds of water per million standard cubic feet of gas
lbf-ft pound foot
Nl/min normal liters per minute
m meters
mA milliampere
mg/m3milligrams per cubic meter
mm millimeter
mm2millimeter squared
Mpa megapascal
m/sec meters per second
Nm Newton meter
pcb printed circuit board
psig pounds per square inch (gauge)
ppmVparts per million by volume
ppmWparts per million by weight
PTFE Polytetrafluoroethylene
Ra roughness average (unit of measure of surface finish)
RH relative humidity
scfh standard cubic feet per hour
UNF unified fine thread
m micrometer
“ inches
% percentage
V Volts

Easidew PRO XP User’s Manual
Michell Instruments 1
INTRODUCTION
1 INTRODUCTION
The Easidew PRO XP has been manufactured, tested and calibrated to the highest
available standards and should arrive in perfect working order, ready for installation into
a gas or liquid measurement application.
For questions about the instrument or how to install and operate it, contact your local
representative. Refer to www.michell.com for details of Michell Instruments’ worldwide
offices’ contact information.
There are two variants of the Easidew PRO XP, each available with various options for
display, housing, range, etc.:
Easidew PRO XP-TX For gases
Easidew PRO XP-LQ-TX For liquids
1.1 Features
The Easidew PRO XP is a continuous, on-line, 4-20 mA transmitter for the measurement
of moisture content in air, other non-corrosive gases and non-polar liquids. It is designed
specifically for use within Zone 1 & 2 and Zone 21 & 22 Hazardous Areas (ATEX &
IECEx) and Class I, Division 1, Groups A, B, C & D, Class II and III, Division 1, Groups
E, F & G, Class I, Zone 1 & Zone 21 Hazardous Locations ( N. America). See appendix
A and B for further details.
The Easidew PRO XP key features are:
• Measurement ranges -110 up to +20°Cdp (-166 to +68°Fdp)
• Global explosion / flameproof certification
• Accuracy ±1°Cdp (±1.8°Fdp)
• 2-wire 4-20 mA output
• Traceable 13-point calibration certificate
• 450 bar (6526 psi) pressure rating
• 3/4” UNF industry standard process connection
• EN 10204 3.1 material certification
• Moisture in gases and liquids
• Optional integral display meter
• Aluminium or stainless steel enclosure

Easidew PRO XP User’s Manual
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INSTALLATION
2 INSTALLATION
2.1 Unpacking the Instrument
On delivery, please check that all the following standard components are present in the
packing box:
• Easidew PRO XP Transmitter (EX1 - Non-display OR EX2 - Display)
• Certificate of calibration
• 2 off bootlace ferrules
• 1.5mm A/F allen key (aluminium housing version only)
• 2mm A/F allen key (stainless steel housing version only)
• 1 off conduit entry blanking plug (fitted hand tight)
• User’s manual
• Installation and maintenance information sheet
• Sample block (optional)
• Pipe mounting bracket (optional)
• EN10204 3.1 material certificates (optional)
The Easidew PRO XP is protected within the main packaging with a green cap protecting
the sensor guard with a desiccant capsule inside, and a plastic cap inside the cable
entry opening (see
Figure 1).
Remove and retain these items prior to commissioning.
DO NOT HANDLE THE SENSOR GUARD
Figure 1 Sensor Cap Removal

Easidew PRO XP User’s Manual
Michell Instruments 3
INSTALLATION
2.1.1 Wall Mounting
The instrument is housed in an aluminum or stainless steel Exd enclosure suitable for
wall or panel mounting. Two mounting points are available with ø7mm (ø0.3”) clearance
holes on fixing centers 127mm (5”) apart. Use 2 off max 6.5mm (0.25”) diameter
mounting fasteners with a minimum length of 35mm (1.4”).
The enclosure provides environmental ingress protection IP66/NEMA4 and should be
mounted vertically in a location free of any appreciable vibration. It is good engineering
practise to place it in a shaded position to prevent heating effects through solar radiation.
Conduit entries can accept connection for threaded rigid metal conduit or other wiring
methods in accordance with Article 501 of the National Electrical Code ANSI/NFPA
70-latest version and IEC/EN 60079-14:latest version.
108 mm 127 mm
Figure 2 Dimensions Easidew PRO XP EX1 (Non-Display) - Wall Mounting

Easidew PRO XP User’s Manual
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INSTALLATION
Figure 3 Dimensions Easidew PRO XP EX2 (Display) - Wall Mounting

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Michell Instruments 5
INSTALLATION
2.1.2 Pipe Mounting
The Easidew PRO XP can be supplied with a pipe mounting bracket as an optional
accessory, which allows the transmitter to be installed onto pipework up to 51mm (2”)
diameter.
Figure 4 Transmitter Mounting - Pipe or Duct
Figure 5 Dimensions Easidew PRO XP EX1 (Non-Display) - Pipe or Duct
Figure 6 Dimensions Easidew PRO XP EX2 (Display) - Pipe or Duct

Easidew PRO XP User’s Manual
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INSTALLATION
2.2 Gas Media Process Connection
The Easidew PRO XP transmitter can be mounted in any orientation for the following:
• inserted into a pipe or duct
• inserted into a flow-through sample block (optional).
It can be operated up to 45 MPa (450 barg/6500 psig) when fitted correctly.
If the installation is NOT into a Michell sample block please take note of the following
to ensure correct installation is undertaken.
The following procedure must be carried out by a qualified
engineer to ensure the safe operation of the pressure system.
O-ring
large clamping nut
seal nut
Figure 7 Transmitter Direct Mounting
1. Ensure the O-ring is located correctly within the O-ring groove of the
process connection and that there is no contamination or debris on its
exposed surfaces.
2. Ensure that the sealing face of the transmitter mounting is normal to the
thread (0.08mm/25mm (0.003”/1”)run).
3. Ensure that the O-ring mating sealing surface is 0.8 Ra (0.8m) or better.
4. Ensure that the mating connection thread is cut to the correct size (¾”
UNF x 16) with a minimum chamfer of 1mm (0.04”).
5. Screw the transmitter into the sample block and, whilst holding the flats
on the block, tighten the seal nut to 40Nm (29.5 lbf-ft) to compress the
O-ring.

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Michell Instruments 7
INSTALLATION
6. Rotate the enclosure to the desired position (up to 360° available) and
tighten the large clamping nut (32mm 1¼”) to 10Nm (7.4 lbf-ft) to ensure
dowty seal is correctly compressed for environmental protection (see
Appendix B.1).
The recommended fluid flow rate, when mounted in the optional sample block, is 1 to
5 l/min (2.1 to 10.6 scfh). However, for direct insertion applications, the flow can be
from static to 10 m/sec (32.8 fps).
The Easidew PRO XP is fitted with a mechanical stop to prevent
the accidental over-rotation of the enclosure assembly that
would damage the internal sensor wiring.
2.3 Liquid Media Process Connection
When mounting the Easidew PRO XP into a liquid sample the flow rate must be between
0.1 and 0.3 l/min (0.2 and 0.6 scfh).
Consideration should be taken regarding draining the sample fluid at times when the
transmitter needs to be removed for maintenance or calibration.
It would be beneficial for the Easidew PRO XP to be mounted in a vertical position (with
the sensor pointing down) to allow for easy removal when necessary.

Easidew PRO XP User’s Manual
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INSTALLATION
2.3.1 Sample Block (Optional)
The following procedure must be carried out by a qualified
engineer to ensure the safe operation of the pressure system.
1. Remove the green protective cap and desiccant capsule.
2. Ensure the O-ring (see
Figure 8) is located correctly within the O-ring
groove of the process connection and there is no contamination or debris
on its exposed surfaces.
3. Screw the transmitter into the sample block and, whilst holding the flats
on the block, tighten the seal nut to 40Nm (29.5 lbf-ft) to compress the
O-ring.
4. Rotate the enclosure to the desired position (up to 360° available) and
tighten the large clamping nut (32mm 1¼”) to 10Nm (7.4 lbf-ft) to ensure
dowty seal is correctly compressed for environmental protection (see
Appendix B.1).
Figure 8 Transmitter Mounting - Sample Block
Figure 9 Outline Dimensions - Sample Block

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Michell Instruments 9
INSTALLATION
2.3.2 Orientating the display
The display can be oriented at 90, 180, 270 or 360º intervals to the process connection.
The procedure to change the orientation of the display is as follows:
• Unscrew the lid from the enclosure
• The display module is located onto two pillars mounted to the base
• Receivers on the underside of the display module are mounted at
90° intervals
• Choose the required display orientation, and ensure that the display
is properly located onto the pillars
• Screw the lid back onto the enclosure
Figure 10 Orientating the display

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INSTALLATION
2.4 Hazardous Area Safety
Appendix B of this manual refers to the Hazardous Area Certification of this product.
This product is fitted with a marking label that contains Hazardous Area information
pertinent to the suitable location and installation.
During all installation and operation activities local regulations and permitted working
routines must be observed. Installation should only be performed by competent
personnel and in accordance with IEC/EN 60079-14:latest version or local equivalent.
Cable glands / conduit seals shall be installed in accordance with the manufacturer’s
instructions.
Conduit seals used should be suitable for a reference pressure of 6.1 bar (89 psi).
Repair and servicing of this equipment must only be carried out by the manufacturer.
Supplied separately to the manual is an Installation and Maintenance Information Sheet.
WARNING:
This product is Certified safe for use in a Zone 1 & 21, and Zone
2 & 22 and Class I, Zone 1 and Class I, Division 1 area only. This
product must not be installed or used within a Zone 0 area.
WARNING:
This product must not be operated within an explosive
atmosphere greater than 1.1 bar absolute (16 psia).
WARNING:
This product must not be operated with enriched oxygen gas
samples
(more than 21% oxygen content).
WARNING:
This product must not be operated outside of
the temperature range of -40 and +60°C (-40 and +140°F).
WARNING:
The enclosure of this product provides Exd protection, partly
through the threads used for mounting the lid, stopping plugs
and cable gland. At all times effort should be made to ensure
these threads are suitably protected from damage and that
only appropriately rated mating parts are applied to them, in
accordance with the certifying requirements.

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Michell Instruments 11
INSTALLATION
2.5 Electrical Safety
WARNING:
During the installation of this product ensure that all applicable
national and local electrical safety regulations are observed.
WARNING:
Isolate the power prior to installation.
WARNING:
Always ensure that power is switched off prior to accessing the
product for any purpose other than normal operation or prior to
disconnecting any cables.
In compliance with IEC 61010 Electrical Safety Standard the following applies to this
product:
2.5.1 Equipment Ratings and Installation Details
This equipment must be supplied with a voltage between the range of 14 to 28 V DC.
Maximum power rating is 1 W.
The power is connected via PL2 on the pcb.
The input and output connector is a 2-part pcb mounted type, rated at 300 V, 10 A.
The detachable, screw terminal half of each connector is designed to accept 0.5-2.5mm2
[24 -12 AWG] (0.02-0.092” ) stranded or solid conductors (non-display version only).
Any power connection cable should have a minimum 0.5mm (0.02”) insulation and be rated
at 300 V. Ensure the power supply can deliver sufficient power consumption requirement.
Ensure any power supply terminals and voltages are suitably separated from the other
I/O requirements of this product.
Before applying power, perform a continuity test to ensure that the power supply screen
and product are effectively connected to the protective Earth.

Easidew PRO XP User’s Manual
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INSTALLATION
The protective Earth terminal is mounted externally
and the Earth wire connected to it should never be
disconnected. The product enclosure is supplied with a
5mm (0.2”) diameter external Earth connection at the
lower right hand side. At installation, connect this Earth
connection to plant Earth by a minimum 4mm2(0.162”)
earthing bonding.
This product is designed, where applicable and possible, to be in compliance with EN/
BS/IEC61010 safety requirements or electrical equipment or measurement, control,
and laboratory use. This product is designed to be safe at least under the following
conditions: between a temperature range of -5 to +40°C (+23 to +104°F), in maximum
80% relative humidity for temperatures up to +31°C (+88°F) decreasing linearly to
50% RH at +50°C (+122°F). Supply voltages of ±10% and transient over voltages
up to Overvoltage Category II. Pollution Degree 2. Altitudes up to 2000m. Outdoor
mounting is permitted using suitably rated glands equivalent to NEMA 4 / IP66. See
Appendix A, Technical Specification, for full operating parameters.
NOTE: Do not remove or exchange any of the cables or electrical components
supplied with this product. Doing so will invalidate all warranties.
Refer to the relevant sections of this manual for the location and mounting details.
Installation of this equipment should include the provision of a suitable and locally
positioned power isolation switch or circuit breaker. Indication of the purpose of the
switch or circuit breaker is strongly recommended. An over-current protection device
should be rated to a maximum of 3 A.
Ensure this equipment and all power isolation devices are installed in a location and
position that allows safe and easy access to their operation and is adequate to rigidly
support the equipment.
Do not install this equipment in a location that would expose it impact or high levels of
vibration.
Operation of this equipment, other than in a manner as specified by the manufacturer,
may impair the safety protections provided.
The safe installation of this equipment and any system incorporating this equipment is
the responsibility of the installer. Ensure local regulations and requirements are referred
to prior to any installation commencing.