Michell Instruments Easidew Pro XP Operating Manual
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
iv 97442 Issue 6, May 2019
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
viii 97442 Issue 6, May 2019
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
4 97442 Issue 6, May 2019
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.
6 97442 Issue 6, May 2019
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