PST MICHELL Instruments Easidew PRO XP User manual
Easidew PRO XP
Moisture Transmitter
User Manual
97442 Issue 6.6
June 2023
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© 2023 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 Manual
iv 97442 Issue 6.6, June 2023
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
2.6.1 Pressure Testing.......................................................................................... 14
2.7 Electrical Schematic .......................................................................................... 15
2.7.1 Easidew PRO XP EX1 (Non-Display) .............................................................. 15
2.7.2 Easidew PRO XP EX2 (Display) .................................................................... 16
2.7.3 Electrical Boundaries ................................................................................... 16
2.8 Preparation of the Sensor Cable ........................................................................ 17
2.8.1 Terminal Block Connection – Easidew PRO XP EX1 (Non-Display) .................... 17
2.8.2 Terminal Block Connection – Easidew PRO XP EX2 (Display) ........................... 18
3 OPERATION ....................................................................................................20
3.1 Measurement and Conguration ........................................................................ 20
3.2 Sampling Hints ................................................................................................. 21
4 MAINTENANCE ................................................................................................22
4.1 Calibration ....................................................................................................... 22
4.2 Sensor Guard Replacement ............................................................................... 22
4.3 Display Replacement......................................................................................... 23
4.4 O-Ring Replacement ......................................................................................... 24
Contents
Safety ...............................................................................................................................vii
Toxic Materials ............................................................................................................vii
Repair and Maintenance ..............................................................................................vii
Calibration ..................................................................................................................vii
Safety Conformity .......................................................................................................vii
Abbreviations .................................................................................................................... viii
Easidew PRO XP User 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) ...........................15
Figure 12 Electrical Schematic
– Easidew PRO XP EX2 (Display) ..................................16
Figure 13 Maximum Load of Easidew PRO XP – Including Cable Resistance .................16
Figure 14 Wire and Crimp Details .............................................................................17
Figure 15 Terminal Block Connection – Easidew PRO XP EX1 (Non-Display) ................17
Figure 16 Grub Screw .............................................................................................18
Figure 17 Terminal Block Mounting – Easidew PRO XP EX2 (Display) ...........................18
Figure 18 Grub Screw .............................................................................................19
Figure 19 Indication of Dead Space ..........................................................................21
Figure 20 Replacement of Sensor Guard ...................................................................22
Easidew PRO XP User Manual
vi 97442 Issue 6.6, June 2023
Appendices
Appendix A Technical Specications ..............................................................................26
Appendix B Hazardous Area Certication ......................................................................28
B.1 ATEX/UKCA .................................................................................28
B.2 IECEx ......................................................................................... 28
B.3 North American (cQPSus) .............................................................28
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-Conguration Steps .................................................................32
C.5 Moisture Scaling Label .................................................................34
C.6 Technical Specications - EX2 LED Display ..................................... 35
Appendix D Quality, Recycling & Warranty Information ................................................... 37
Appendix E Return Document & Decontamination Declaration ........................................ 39
Easidew PRO XP User 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
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.
Easidew PRO XP User Manual
viii 97442 Issue 6.6, June 2023
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
UNF unified fine thread
μm micrometer
“ inches
% percentage
V Volts
Easidew PRO XP User 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
Easidew PRO XP-TX-X For gases
Service Exchange
Easidew PRO XP-LQ-TX-X For liquids
Service Exchange
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, UKCA
& IECEx) and Class I, II, III Division 1, Groups A, B, C, D, E, F, G and Class I, Zone 1 &
Zone 21 Hazardous Locations (N. America). See Appendices A and B for further details.
The Easidew PRO XP key features are:
• Measurement ranges -110 up to +20°Cdp (-166...+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 Manual
297442 Issue 6.6, June 2023
INSTALLATION
2 INSTALLATION
Any leak/pressure test must be conducted using cylinder
nitrogen (>=99.995% purity) regulated to the required
pressure (not exceeding the maximum operating pressure of
the sensor/system). Hydrostatic testing using water or any
liquid is not permitted.
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)
• 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
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