Easidew PRO XP
Moisture Transmitter
User’s Manual
97442 Issue 6
May 2019
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Easidew PRO XP
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www.michell.com
© 2019 Michell Instruments
This document is the property of Michell Instruments Ltd. and may not be copied or
otherwise reproduced, communicated in any way to third parties, nor stored in any Data
Processing System without the express written authorization of Michell Instruments Ltd.
Easidew PRO XP User’s Manual
Contents
Safety ...............................................................................................................................vii
Toxic Materials ............................................................................................................vii
Repair and Maintenance .............................................................................................. vii
Calibration ..................................................................................................................vii
Safety Conformity .......................................................................................................vii
Abbreviations .................................................................................................................... viii
1 INTRODUCTION ................................................................................................1
1.1 Features ............................................................................................................ 1
2 INSTALLATION ..................................................................................................2
2.1 Unpacking the Instrument ................................................................................... 2
2.1.1 Wall Mounting .............................................................................................. 3
2.1.2 Pipe Mounting ............................................................................................... 5
2.2 Gas Media Process Connection ........................................................................... 6
2.3 Liquid Media Process Connection ......................................................................... 7
2.3.1 Sample Block (Optional) ............................................................................... 8
2.3.2 Orientating the display .................................................................................. 9
2.4 Hazardous Area Safety ...................................................................................... 10
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 Conguration ........................................................................ 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
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Easidew PRO XP User’s Manual
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) ...........................14
Figure 12 Electrical Schematic
Figure 13 Maximum Load of Easidew PRO XP - Including Cable Resistance .................15
Figure 14 Wire and Crimp Details .............................................................................16
Figure 15 Terminal Block Connection - Easidew PRO XP EX1 (Non-Display) .................16
Figure 16 Grub Screw .............................................................................................17
Figure 17 Terminal Block Mounting - Easidew PRO XP EX2 (Display) ...........................17
Figure 18 Grub Screw .............................................................................................18
Figure 19 Indication of Dead Space ..........................................................................20
Figure 20 Replacement of Sensor Guard ...................................................................21
- Easidew PRO XP EX2 (Display) ..................................15
Michell Instruments v
Easidew PRO XP User’s Manual
Appendices
Appendix A Technical Specications ..............................................................................25
Appendix B Hazardous Area Certication ......................................................................27
B.1 Product Standards .......................................................................27
B.2 Product Certication ....................................................................27
B.3 Global Certicates/Approvals ........................................................28
B.4 Special Conditions........................................................................28
B.5 Maintenance and Installation ........................................................ 28
Appendix C Fully Programmable Loop Powered 4-Digit LED Display Meter ....................... 30
C.1 Display Meter Parameter Limits .....................................................30
C.2 Display Meter Operating Range .....................................................30
C.3 Display Meter View ...................................................................... 30
C.4 Re-Conguration Steps .................................................................31
C.5 Moisture Scaling Label ................................................................. 32
C.6 Technical Specications - EX2 LED Display ..................................... 33
Appendix D Quality, Recycling & Warranty Information ...................................................35
Appendix E Return Document & Decontamination Declaration ........................................ 37
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Easidew PRO XP User’s Manual
Safety
The manufacturer has designed this equipment to be safe when operated using the procedures
detailed in this manual. The user must not use this equipment for any other purpose than that
stated. Do not apply values greater than the maximum value stated.
This manual contains operating and safety instructions, which must be followed to ensure the safe
operation and to maintain the equipment in a safe condition. The safety instructions are either
warnings or cautions issued to protect the user and the equipment from injury or damage. Use
qualied 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 oces 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 eld 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’ oce 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.
Michell Instruments vii
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/m3 milligrams per cubic meter
mm millimeter
mm2 millimeter squared
Mpa megapascal
m/sec meters per second
Nm Newton meter
pcb printed circuit board
psig pounds per square inch (gauge)
ppmV parts per million by volume
ppmW parts per million by weight
PTFE Polytetrafluoroethylene
Ra roughness average (unit of measure of surface finish)
RH relative humidity
scfh standard cubic feet per hour
Easidew PRO XP User’s Manual
UNF unified fine thread
μm micrometer
“ inches
% percentage
V Volts
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Easidew PRO XP User’s Manual
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
INTRODUCTION
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
Michell Instruments 1
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)
• Installation and maintenance information sheet
• Sample block (optional)
Easidew PRO XP User’s Manual
• 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
Remove and retain these items prior to commissioning.
Figure 1).
DO NOT HANDLE THE SENSOR GUARD
Figure 1
Sensor Cap Removal
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Easidew PRO XP User’s Manual
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
INSTALLATION
Figure 2
Dimensions Easidew PRO XP EX1 (Non-Display) - Wall Mounting
Michell Instruments 3
INSTALLATION
Easidew PRO XP User’s Manual
Figure 3
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Dimensions Easidew PRO XP EX2 (Display) - Wall Mounting
Easidew PRO XP User’s Manual
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.
INSTALLATION
Figure 5
Figure 4
Dimensions Easidew PRO XP EX1 (Non-Display) - Pipe or Duct
Transmitter Mounting - Pipe or Duct
Figure 6
Dimensions Easidew PRO XP EX2 (Display) - Pipe or Duct
Michell Instruments 5
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 qualied
engineer to ensure the safe operation of the pressure system.
Easidew PRO XP User’s Manual
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 (0.8µm) 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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Easidew PRO XP User’s Manual
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 tted 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
INSTALLATION
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.
Michell Instruments 7
INSTALLATION
2.3.1 Sample Block (Optional)
The following procedure must be carried out by a qualied
engineer to ensure the safe operation of the pressure system.
1. Remove the green protective cap and desiccant capsule.
Easidew PRO XP User’s Manual
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
Figure 9
Transmitter Mounting - Sample Block
Outline Dimensions - Sample Block
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Easidew PRO XP User’s Manual
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
INSTALLATION
Figure 10
Orientating the display
Michell Instruments 9
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.
This product is supplied with 1 off multi-national approved Exd Stopping Plug. Other
suitably Exd approved Stopping Plugs may be used at the choice of the installer.
The installation of Easidew PRO XP will require the use of a suitably approved Exd
rated Cable Gland. The Cable Gland is not supplied and the specific type/size must be
selected at the choice of the installer and to suit the type of connecting cable used.
The Cable Gland may be fitted to either of the Gland entry ports.
For the convenience of the installation process the Stopping Plug supplied is only loosely
fitted so that it may finally secured to the spare port opposite the Cable Gland after
the Cable Gland installation has been completed. A Stopping Plug must be fitted to the
spare port.
Easidew PRO XP User’s Manual
The Cable Gland and Stopping Plug must be tightly fitted without the use of any sealing
tape or sealing compounds and in accordance with local regulations.
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.
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Easidew PRO XP User’s Manual
This product is Certied 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.
This product must not be operated within an explosive
atmosphere greater than 1.1 bar absolute (16 psia).
This product must not be operated with enriched oxygen gas
(more than 21% oxygen content).
INSTALLATION
WARNING:
WARNING:
WARNING:
samples
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 eort 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.
Michell Instruments 11
INSTALLATION
2.5 Electrical Safety
During the installation of this product ensure that all applicable
national and local electrical safety regulations are observed.
Always ensure that power is switched o prior to accessing the
product for any purpose other than normal operation or prior to
Easidew PRO XP User’s Manual
WARNING:
WARNING:
Isolate the power prior to installation.
WARNING:
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.
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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.
INSTALLATION
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.
Michell Instruments 13
INSTALLATION
2.6 Pressure Safety
This product is used in conjunction with pressurized gases.
The Easidew PRO XP requires pressurized gas to be connected to it. Observe pressurized
gas handling regulations and only suitable trained personnel should carry out task that
include the use of pressurized gas mediums.
DO NOT permit pressures greater than the safe working pressure to be applied to the
instrument. The specified safe working pressure for this instrument is 450 barg (6525
psig) max.
Easidew PRO XP User’s Manual
WARNING:
Observe pressurized gas handling precautions.
WARNING:
Pressurized gas is dangerous.
Pressurized gas should only handled by suitably trained
personnel.
2.7 Electrical Schematic
2.7.1 Easidew PRO XP EX1 (Non-Display)
NOTE: To ensure compliance with EMC standards, ensure that the screen of the
power supply/signal cable or the power supply/signal conduit is connected
to ground.
With the cable entry option, a conductive cable entry gland is recommended,
allowing the transmitter housing to be earthed via the cable screen connection.
Always connect the 4-20 mA return signal to a suitable load
(see
Figure 15)
connection, the transmitter may be damaged if allowed to
before the power is applied. Without this
operate for prolonged periods.
1 2 3 4
Screen or Conduit
+
SUPPLY
LOAD
-
Figure 11
Electrical Schematic - Easidew PRO XP EX1 (Non-Display)
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Easidew PRO XP User’s Manual
2.7.2 Easidew PRO XP EX2 (Display)
NOTE: To ensure compliance with EMC standards, ensure that the screen of the
power supply/signal cable or the power supply/signal conduit is connected
to ground.
With the cable entry option, a conductive cable entry gland is recommended,
allowing the transmitter housing to be earthed via the cable screen connection.
Always connect the 4-20 mA return signal to a suitable load
(see
Figure 16)
connection, the transmitter may be damaged if allowed to
INSTALLATION
before the power is applied. Without this
operate for prolonged periods.
Back of display module
TRANSMITTER
LOOP POWER
+VE
VE
-
+VE
VE
-
Figure 12
2.7.3 Electrical Boundaries
600
500
From main transmitter pcb
Screen or Conduit
Electrical Schematic
LOAD
- Easidew PRO XP EX2 (Display)
+
SUPPLY
-
400
300
Resistance (ohms)
200
100
12 14 16 18 20 22 24 26 28
Supply Voltage
Figure 13
Maximum Load of Easidew PRO XP - Including Cable Resistance
Michell Instruments 15
INSTALLATION
2.8 Preparation of the Sensor Cable
The sensor cable is not supplied with the Easidew PRO XP, but
there are 2 o bootlace ferrules supplied. Maximum conductor
Correct preparation of the cable conductors is essential to ensure a reliable connection
to the sensor terminals.
1. Strip the insulation from each conductor to 8mm, without damaging any
wire strands.
2. Using a crimp tool such as the CK 3682 (RS 343-8824), correctly attach
each ferrule.
Easidew PRO XP User’s Manual
size is 0.75mm² (0.03²”).
Figure 14
2.8.1 Terminal Block Connection - Easidew PRO XP EX1 (Non-Display)
1. Remove the enclosure lid by carefully unscrewing anti-clockwise
2. Remove the 4-way terminal block from its header on the pcb, being careful
not to put any strain onto the earth wire already attached.
3. Mount each of the power and return wires into positions 2 and 4 as
shown, and tighten with a flat-blade screwdriver (min torque 0.25Nm
(0.2 lbf-ft)).
Wire and Crimp Details
Figure 15
Terminal Block Connection - Easidew PRO XP EX1 (Non-Display)
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Easidew PRO XP User’s Manual
4. Plug the terminal block back into the header.
5. Re-fit the enclosure lid in a clockwise direction until it stops and secure in
place by tightening the grub screw with a 1.5mm (0.06”) A/F Allen key.
INSTALLATION
Grub screw
Figure 16
2.8.2 Terminal Block Connection - Easidew PRO XP EX2 (Display)
1. Remove the enclosure lid by carefully unscrewing anti-clockwise.
2. Lift off the display meter and integral mounting bracket from the 2
mounting posts and disconnect the terminal block connector from the
underside.
Grub Screw
3. Mount each of the power and return wires into positions Loop Power +VE and
Loop Power -VE as shown, and tighten with a flat bladed screwdriver (min
torque 0.25Nm (0.2 lbf-ft)).
Figure 17
Terminal Block Mounting - Easidew PRO XP EX2 (Display)
Michell Instruments 17
INSTALLATION
4. Plug the terminal block back into the underside of the display meter and
place it back onto its posts. Align the display meter in relation to the
housing, as required.
5. Re-fit the enclosure lid in a clockwise direction until it stops and secure in
place by tightening the grub screw with a 1.5mm (0.06”) A/F Allen key.
Easidew PRO XP User’s Manual
Grub screw
Figure 18
Grub Screw
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Easidew PRO XP User’s Manual
3 OPERATION
3.1 Measurement and Conguration
The Easidew PRO XP can be configured to provide an output of 4-20 mA (2-wire
connection) for the following:
Dew point -110 to +20°C (-166 to +68°Fdp)
Moisture content in gas 0 - 3000 ppm
Moisture content in liquids 0 - 3000 ppm
The Easidew PRO XP is factory configured either as °Cdp (default) or °Fdp (North
America). The Easidew PRO XP can be re-configured by the customer, using the
Easidew XP Communications Kit (XP-CK) and Easidew Application Software. The
Easidew Communications Kit can be purchased from Michell Instruments or a local
representative. For a free copy of the Application Software contact Michell Instruments’
UK office (see www.michell.com for details of Michell’s contact information).
For moisture content in gas, the calculation from the measured dew point is assumed to
be at atmospheric pressure. Alternatively, a fixed gas pressure needs to be programmed
into the Easidew PRO XP.
OPERATION
(and equivalent mg/m3, lbs/MMSCF)
V
W
For moisture content measurement in liquid, the Easidew PRO XP requires the saturation
constant of the liquid to be programmed into the transmitters, either at the factory or
by the customer using the Application Software.
The transmitter requires a 6-point look-up table for saturation constants up to 3000
ppmW over the temperature range 0 to +50°C (+32 to +122°F). Saturation constants
for 8 common liquids can be programmed into the Easidew PRO XP via the Application
Software. Alternatively, the user can program saturation constants manually. The
Application Software Help file provides detailed instructions on how to perform this task.
Easidew PRO XP EX2 (Display) Only
The display meter is simple in design and is a slave display to the measurement and
configuration of the main transmitter pcb. It can be scaled linearly equating to the
circulating 4-20 mA signal output from the main transmitter pcb.
In order to re-configure the display, the enclosure lid should be removed by unscrewing
it in an anti-clockwise direction.
Care should be taken when unscrewing and replacing the
enclosure lid as the threads form an important part of the Ex
compliance regulations and therefore must not be damaged.
The lid must be replaced after using the display meter and the
grub screw tightened.
A full explanation of the operation and configuration of the integral display meter is
detailed in Appendix D.
Michell Instruments 19
OPERATION
3.2 Sampling Hints
Operation is very simple, assuming the following installation techniques are adhered to:
Be Sure the Sample is Representative of the Gas Under Test:
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.
Minimize Dead Space in Sample Lines:
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.
Easidew PRO XP User’s Manual
Deadspace
Figure 19
Remove Any Particulate Matter or Oil from the Gas Sample:
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 filter, as a minimum level of protection. For more demanding applications
Michell Instruments offers a range of sampling systems (for more information contact
www.michell.com).
Use High Quality Sample Tube and Fittings:
Michell Instruments recommends that, wherever possible, stainless steel tubing and
fittings 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 and work within the maximum pressure rating of this tubing.
Indication of Dead Space
Position Transmitter away from Heat Source:
It is recommended, as good instrumentation practice, that the transmitter is placed
away from any heat source to avoid adsorption/desorption (particularly solar radiation
during daylight hours).
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Easidew PRO XP User’s Manual
!
4 MAINTENANCE
The power to the enclosure must be turned o before any
work is carried out in the measurement system enclosure.
MAINTENANCE
Gas line connections to the measurement system must be
isolated and de-pressurized before any work commences.
4.1 Calibration
Routine maintenance of the Easidew PRO XP is confined to regular re-calibration by
exposure of the transmitter to sample gases of known moisture content to ensure that
the stated accuracy is maintained. Calibration services traceable to the UK
Physical Laboratory
(NIST) are provided by Michell Instruments.
Michell Instruments offers a re-calibration service to suit specific needs. A Michell
representative can provide detailed, custom advice (for Michell Instruments’ contact
information go to www.michell.com).
4.2 Sensor Guard Replacement
(NPL) and the US
Observe de-energize durations.
National Institute of Standards and Technology
National
The sensor is supplied with either a stainless steel sintered or HDPE guard.
The stainless steel guard provides >80μm protection to the dew-point sensor, whereas
the HDPE protects to >10μm. It is designed to show any contamination and the guard
should be changed if the surface becomes discolored.
When replacing the guard, care should be taken to minimize touching the guard which
should be handled by the threaded part. Replacement guards can be obtained by
contacting Michell Instruments (www.michell.com) or your local distributor.
Please note the sensor tile should not be touched.
HANDLE THIS
THREADED PART
ONLY
Figure 20
Michell Instruments 21
Replacement of Sensor Guard
MAINTENANCE
4.3 Display Replacement
1. Unscrew the locking screw on the enclosure cap with a 1.5mm A/F Allen
key.
2. Unscrew the cap, lift the display and mounting ring clear from the 2 off
mounting pillars, and unplug the connector.
Easidew PRO XP User’s Manual
3. Remove the 2 off small screws holding the display onto its mounting ring.
Lift the display clear.
4. Re-assemble as above, in reverse order, being careful not to overtighten
the screws. Ensure that the connector is fully mated.
5. Re-fit the enclosure cap and tighten the locking screw.
6. The display is supplied with a default configuration. Refer to Appendix D.4
‘Re-configuration Steps’ if required.
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Easidew PRO XP User’s Manual
4.4 O-Ring Replacement
Do not touch the lter with bare hands
1. Identify the O-ring to be removed, as shown below.
BS116 (3/4” x 3/32”) viton,
MAINTENANCE
75 shore
2. Carefully slide tweezers, thin bladed screwdriver or a blunt needle under
the outer edge of the O-ring. NOTE: Take care not to scratch any of
the surfaces of the surrounding metal component.
3. Move the tool around the circumference to assist the extraction process.
Slide the O-ring clear of the thread and filter.
4. Make sure the groove has no scratches and is free from grease, dirt
or debris. Slide the new O-ring over the filter and thread and into the
groove. NOTE: Do not touch the filter with bare hands.
Michell Instruments 23
APPENDIX A
Easidew PRO XP User’s Manual
Appendix A
Technical Specications
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Easidew PRO XP User’s Manual
APPENDIX A
Appendix A Technical Specications
Performance Specications Easidew PRO XP for Gases Easidew PRO XP LQ for Liquids
Measurement range –110 to +20°C dew point; –100 to +20°C dew point 0 to 1000 ppmW; Non-standard available on request
Accuracy ±1°C dew point (+20 to –60°C); ±2°C dew point (–60 to –110°C)
Response time 5 mins to T95 (dry to wet)
Repeatability 0.5°C dew point
Calibration Traceable 13 point calibration and certicate
Electrical Specications
Output signal 4–20 mA (2-wire connection, current source); User congurable over range
Output Dew point or moisture content Moisture content
Analog output scaled
range
Supply voltage 14 to 28 V DC
Load resistance Max 250 Ω @ 14 V (500 Ω @ 24 V)
Current consumption 23 mA max, depending on output signal
Saturation constants
(for moisture in liquids measurements
only)
CE conformity 2004/108/EC, 94/9/E ATEX directive
Operating Specications
Operating temperature –40 to +60°C
Compensated Temperature
Range
Storage Temperature -40 to +60°C
Operating pressure
Flow rate
Mechanical Specications
Ingress protection
Explosion and ameproof area
certicates
Dew point: –110 to +20°C; Moisture content in gas:
0–3000 ppm
1 to 5 Nl/min mounted in standard sampling block; 0 to 10
Non-standard: mg/m3, lbs/MMSCF natural gas
V;
NOTE: The transmitter accuracy statement is only valid
for the temperature range: -20/+50°C
45 MPa (450 barg) maximum
m/sec direct insertion
6-point look-up table for saturation constants up to 1000 ppmW over the
temperature range 0 to +50°C; saturation constants for 8 common liquids
can be programmed into the Easidew PRO XP LQ via the application
software; alternatively the user can program saturation constants manually
-20 to +50°C
Moisture content in liquid: 0–1000 ppm
Non-standard available upon request
0.1 to 0.3L/min through Easidew sample block
0.1 to 1m/s direct insertion
W
IP66 in accordance with standard BS EN 60529:1992; NEMA 4 protection in accordance with standard NEMA
250–2003
ATEX: Standard: Aluminium
IECEx: Exd [ia] IIC T6 Gb
cCSAus: CLS I, Div1, GRPS ABCD
INMETRO (Brazil): Zone 21, AEx/Ex tb IIIC T80°C
II 2 GD Exd [ia] IIC T6 Gb
EX tb IIIC T80°C Db IP66
Tamb –20°C to +70°C
Ex tb IIIC T80°C Db IP66
Tamb –20°C to +70°C
CLS II & III, Div1, GRPS EFG
CLS I, Zone 1 AEx/Exd [ia] IIC T6
Tamb = –20°C to +70°C IP66
[Approval codes as per IECEx]
Optional: 316 stainless steel
II 2 GD Exd [ia] IIC T6 Gb
EX tb IIIC T80°C Db IP66
Tamb –20°C to +70°C
Exd [ia] IIC T6 Gb
Ex tb IIIC T80°C Db IP66
Tamb –20°C to +70°C
CLS I, Div1, GRPS ABCD
CLS II & III, Div1, GRPS EFG
Tamb = –20°C to +70°C IP66
TC TR EX-Certi cate:
1Ex d [ia] IIC T6 Gb X
Ex tb IIIC T80°C Db X
Tamb –20°C to +70°C
(Russia, Belarus, Kazakhstan)
Russian pattern approval Pending: Russia (GOST-R), Kazakhstan (GOST-K)
Canadian pressure vessel cert C.R.N. - all Canadian provinces
Oxygen Service Optional: cleaned for enriched oxygen
Housing material
Housing moisture protection Optional: Electronics Conformal Coating
Filter (sensor protection)
Process connection and material 3/4” — 16 UNF with recessed Viton® O-ring; 316 stainless steel
Weight Aluminium: 1.6kg; 316 stainless steel: 2.4kg
Electrical connections Dual 3/4” NPT gland
Programmable display meter range Optional: –1999 to +9999
Programmable display decimal point
Display meter overload limits Optional: 3.6 mA and 20.4 mA
Programmable display meter scales Optional: °C, °F, %, No Scale
Stainless Steel tags Optional: 316 stainless steel tags (70 x 25mm)
Diagnostic conditions
(factory programmed)
Optional: 316 stainless steel (supplied with BS EN 10204 3.1 material certicate if option F2 requested) (ATEX, IECEx & cCSAus)
Standard: Aluminium (copper free), epoxy and polyurethane powder coated, blue RAL 5009
Standard: Stainless steel sintered guard (for protection against ne particulate >80µm)
Optional: HDPE guard (for protection against ne particulate >10µm)
Optional: 0 to 3 decimal places
Conditions
Sensor fault
Under-range dew point
Over-range dew point
Output
23 mA
4 mA
20 mA
Michell Instruments 25
APPENDIX B
Easidew PRO XP User’s Manual
Appendix B
Hazardous Area Certication
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Easidew PRO XP User’s Manual
Appendix B Hazardous Area Certication
The Easidew PRO XP is certified compliant to the ATEX Directive (2014/34/EU) and
IECEx for use within Zone 1 & 2 and Zone 21 & 22 Hazardous Areas and has been
assessed so by SIRA Certification (Notified Body 0518).
The Easidew PRO XP is certified compliant to the North American Standards (USA and
Canada) for use within 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 and has been
assessed so by cCSAus.
B.1 Product Standards
This product conforms to the Standards:
EN60079-0:2012 IEC 60079-0:2011
EN60079-1:2007 IEC 60079-1:2007
EN60079-11:2012 IEC 60079-11:2011
EN60079-31:2009 IEC 60079-31:2008
C22.2 No. 0-M10 CAN/CSA-C22.2 No. 60079-0:11
C22.2 No. 25-1966 CAN/CSA-C22.2 No. 60079-1:11
C22.2 No. 30-M1986 CAN/CSA-C22.2 No. 60079-11:11
C22.2 No. 142-M1987 CAN/CSA-C22.2 No. 60079-31:12
C22.2 No. 157-92 ISA 60079-0:11
FM Class 3600 ISA 60079-1:09
FM Class 3610 ISA 60079-11:11
FM Class 3615 ISA 60079-31:12
FM Class 3616 UL 916-2003
APPENDIX B
B.2 Product Certication
This product is attributed with the product certification code:
ATEX & IECEx
II 2 GD Exd [ia] IIC T6 Gb
Ex tb IIIC T80°C Db IP66 (-20°C to +70°C)
North American (Aluminium enclosure)
Class I, Division 1, Groups A,B,C,D
Class II & III, Division 1, Groups E,F,G
Class I, Zone 1 AEx/Ex d [ia] IIC T6
Zone 21, AEx/Ex tb IIIC T80°C
North American (Stainless Steel enclosure)
Class I, Division 1, Groups ABCD
Class II, Division 1, Groups EFG
Class III, Division 1
Michell Instruments 27
APPENDIX B
B.3 Global Certicates/Approvals
ATEX SIRA14ATEX1007X
IECEx IECEx SIR 14.0004X
cCSAus 2679645
INMETRO NCC 14.03240 X
TC TR Ex RU C-GB.ГБ05.В.00833
These certificates can be viewed or downloaded from our website at:
http://www.michell.com
B.4 Special Conditions
1. The equipment has been assessed with a Um of 28V and shall be installed
in accordance with the latest installation requirements of IEC/EN 6007914 for intrinsically safe equipment for EPL “Gb”.
2. The transmitter shall not be installed in such a manner that the sensing
probe is in a dust environment.
Easidew PRO XP User’s Manual
3. WARNING - POTENTIAL ELECTROSTATIC CHARGING HAZARD. The
equipment must only be wiped with a damp cloth.
4. When installing the transmitter a torque of 10 Nm must be applied to the
sensor body/housing positioning lock nut to secure it. See manufacturer’s
instructions for further details.
B.5 Maintenance and Installation
The Easidew PRO XP must only be installed by suitably qualified personnel and in
accordance with the instructions provided and the terms of the applicable product
certificates.
Maintenance and servicing of the product must only be carried out by suitably trained
personnel or returned to an approved Michell Instruments’ Service Center.
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APPENDIX D
Appendix C
Fully Programmable Loop
Powered 4-Digit LED
Display Meter
Michell Instruments 29
APPENDIX D
Easidew PRO XP User’s Manual
Appendix C Fully Programmable Loop Powered 4-Digit LED Display Meter
In order to re-congure the display meter, the enclosure lid should be removed by unscrewing it in
an anti-clockwise direction.
Care should be taken when unscrewing and replacing the enclosure lid
as the threads form an important part of the Ex compliance regulations
and therefore must not be damaged.
The lid must be replaced after using the display meter, and the grub
screw tightened.
C.1 Display Meter Parameter Limits
The programmable display meter is designed for current loops of 4-20 mA. It is powered from the
loop and does not require any other supply. The display can be congured by set-up menus to show
physical values measured by the sensor.
Display will indicate low (-LO- ) when the input current is lower than the overload limit (3.6 mA).
Display will indicate high (-HI-) when the input current is higher than overload limit (20.4 mA).
Display will indicate (----) when displayed value is <1999 or >9999.
C.2 Display Meter Operating Range
Operating Range from 3.6 to 20.4 mA
Maximum Voltage Drop Out 3.7 V
Display LED 4 digits, height 9.5mm
Indication Limits from -1999 to 9999
Variable Sampling Time from 1 to 10 seconds
C.3 Display Meter View
Easidew PRO XP
Moisture Transmitter
°C DP
E
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Easidew PRO XP User’s Manual
C.4 Re-Conguration Steps
To enter menu press the E button for 2 seconds.
Displayed Text Description
Setting decimal point DP
Press E button
Press and buttons to change decimal position
1.234 (value 3)
12.34 (value 2)
123.4 (value 1) Factory default
1234 to decimal point (value 0)
Press E button. Press to go to Zero Setting
Displayed Text Description
Setting low limit Zero (set-up of the low limit)
Press E button
APPENDIX D
Press and buttons to change the value between -1999 and 9999
(the value chosen will be displayed at input current of 4 mA-point low)
NOTE: For 1 decimal place resolution set this value to 10 times the
actual required value, e.g. -1000 for -100.0 / -1100 for -110.0
Press E button. Press to go to Span Setting
Displayed Text Description
Setting high limit SPAN (setup of the high limit)
Press E button
Press and buttons to change the value between -1999 and 9999
(the value chosen will be displayed at input current of 20 mA-point high)
NOTE: For 1 decimal place resolution set this value to 10 times
the actual required value, e.g. 200 for 20.0
Press E button. Press to go to Li Setting
Displayed Text Description
Setting overload limit Li (set-up of the overload limit)
Press E button
Press and buttons to change the value
0 for 4-20 mA
the display shows -LO- when current < 4 mA
and -HI- when current >20 mA
1 for 3.6 mA - 20.4 mA Factory default
the display shows
-LO - when current <3.6 mA
-HI- when current >20.4 mA
Press E button. Press to go to St Setting
Michell Instruments 31
APPENDIX D
Displayed Text Description
Setting sampling rate St
Press E button
Press and buttons to change the sampling rate from 1 to 10
seconds
1 = Factory default
Press E button. Press to go to Engineering Unit
Displayed Text Description
Set-up Engineering Unit
Press E button
Press and buttons to select the unit
- nonE - for no unit on the display (factory default setting) see D.5
- °C, °F, K, %
(There is a 6 second cycle
- measured value is displayed for 4 seconds
- the unit is displayed for 2 seconds)
Easidew PRO XP User’s Manual
Press E button
Exit from menu and save settings:
Press and buttons (possible from each page)
C.5 Moisture Scaling Label
The Easidew PRO XP has 3 standard ranges and scales which are as follows:
EA-XP-TX -110 to +20°Cdp output range
-100 to +20°Cdp output range
EA-XP-LQ-TX 0-1000ppm
W
The EA-XP-TX units will be congured for the range/scale ordered (as above) and will constantly
display the measured value. The display meter will have a stick-on label dening the scale in °C DP.
Label
Easidew PRO XP
Moisture Transmitter
°C DP
E
If ordered with a non-standard range/scale the unit could be set up with the following:
°F DP
lbs/MMSCF
ppmV
ppm
mg/m
W
3
Alternatively, an Easidew PRO XP Communication Kit (XP-CK) can be used to change the range/scale
and this Kit will be shipped with its own manual and 2 additional sets of scaling labels so that the
label can be changed as required.
32 97442 Issue 6, May 2019
Easidew PRO XP User’s Manual
APPENDIX D
C.6 Technical Specications - EX2 LED Display
The display meter is simple in design and is a slave display to the measurement and conguration of
the main transmitter pcb. It can be scaled linearly equating to the circulating 4-20 mA signal output
from the main transmitter pcb.
Back of display module
TRANSMITTER
LOOP POWER
+VE
VE
-
+VE
VE
-
Screen or Conduit
From main transmitter pcb
LOAD
+
SUPPLY
-
Performance
Reference Operating Condition 25°C
Maximum Measured Error 0.1% of the programmed range ± 1 digit
Inuence of Ambient
Temperature (temp drift)
20 ppm / °C of measuring range at 20°C as reference temperature
Output Signal 4-20 mA
Supply Voltage 24 V (10 to 30 V)
Voltage Drop Out 3.3 V at 4 mA and 3.7 V at 20 mA
Minimum Current of LED
Activation
3.6 mA
Digits LED, 4 digits 7 segments, height 9.5mm
Display Characteristics 6400ucd for If=10 mA
Storage Period 10 years (non-powered)
Operating Conditions
Ambient Temperature -20 to +80°C (-4 to +176°F)
Storage Temperature -30 to +80°C (-22 to +176°F)
Functionality
Parameters Zero, span, decimal, point, refresh rate, unit
Indication Limit -1999 to +9999
Programmable Range -1999 to +9999
Decimal Points Position 0, 1, 2, 3 decimals
Overload Limits From 3.6 to 20.4 mA
Refresh Rate From 1 to 10 seconds
Unit °C, °F, K, % in cycle: 4 second value - 2 second unit
Mechanical Construction
Electrical Loop Connection 2 terminals, max wire section 1mm2 (16 AWG)
Michell Instruments 33
APPENDIX E
Easidew PRO XP User’s Manual
Appendix D
Quality, Recycling
& Warranty
Information
34 97442 Issue 6, May 2019
Easidew PRO XP User’s Manual
Appendix D Quality, Recycling & Warranty Information
Michell Instruments is dedicated to complying to all relevant legislation and directives.
Full information can be found on our website at:
www.michell.com/compliance
This page contains information on the following directives:
• ATEX Directive
• Calibration Facilities
• Conflict Minerals
• FCC Statement
• Manufacturing Quality
• Modern Slavery Statement
APPENDIX E
• Pressure Equipment Directive
• REACH
• RoHS2
• WEEE2
• Recycling Policy
• Warranty and Returns
This information is also available in PDF format.
Michell Instruments 35
APPENDIX F
Easidew PRO XP User’s Manual
Appendix E
Return Document &
Decontamination Declaration
36 97442 Issue 6, May 2019
Easidew PRO XP User’s Manual
Appendix E Return Document & Decontamination Declaration
Decontamination Certicate
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:
APPENDIX F
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
materials. For most applications involving solvents, acidic, basic, ammable or toxic gases a simple purge with dry
gas (dew point <-30°C) over 24 hours should be sufcient to decontaminate the unit prior to return.
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
Michell Instruments 37
http://www.michell.com
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