PST Michell Instruments Pura Advanced Online 2 User manual
Pura
Advanced Online 2 Hygrometer
User Manual
97628 Issue 1
January 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.
Pura Advanced Online 2 Hygrometer
For Michell Instruments' contact information please go to
www.ProcessSensing.com
Pura Advanced Online 2 Hygrometer Manual
iv 97628 Issue 1, January 2023
Contents
Safety ................................................................................................................................vi
Electrical Safety ..........................................................................................................vii
Pressure Safety ...........................................................................................................vii
Hazardous Materials (WEEE, RoHS3 & REACH) ..............................................................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 Unpacking Pura Advanced Online 2 Hygrometer .............................................. 2
2.1.2 Unpacking Pura SEN (transmitter, no block version) ......................................... 3
2.1.3 Unpacking Pura OEM-single bag, PRM-double bag versions .............................. 4
2.1.4 Unpacking the Process Monitor ...................................................................... 4
2.2 Pura Advanced Online 2 Components ................................................................... 5
2.3 Process Monitor Display ...................................................................................... 6
2.3.1 Process Monitor Display Layout ...................................................................... 6
2.3.2 Electrical Connections .................................................................................... 7
2.3.2.1 High-Voltage Power Supply Input ................................................................... 8
2.3.2.2 Low-Voltage Power Supply Input (Alternative) ................................................. 8
2.3.2.3 Dew-Point Sensor Modbus RTU over RS485 Digital Input (Required) ................ 9
2.3.2.4 Pressure Sensor Input (Optional) ................................................................... 9
2.3.2.5 Analog Outputs ............................................................................................. 9
2.3.2.6 Modbus RTU Output ...................................................................................... 9
2.3.2.7 Relay Outputs ............................................................................................. 10
2.3.2.8 Transmitter Connections .............................................................................. 10
2.4 Mounting the Process Monitor ........................................................................... 11
2.5 Pura SEN ......................................................................................................... 11
2.6 Pura OEM, PRM ................................................................................................ 12
2.6.1 Pura M12 Connector Version ........................................................................ 12
2.6.1.1 Electrical Connections .................................................................................. 13
2.6.1.2 Pura M12 Cables ......................................................................................... 14
2.6.2 Cable Selection for Self-Assembled Cables ..................................................... 14
2.7 Transmitter Mounting ........................................................................................ 14
2.7.1 Pura SEN - Sample Block (Optional) ............................................................ 14
2.7.2 Pura OEM & PRM Connection ....................................................................... 16
2.7.3 Pura SEN - Direct Pipeline Connection........................................................... 17
3 OPERATION ....................................................................................................18
3.1 Process Monitor Conguration ........................................................................... 18
3.2 Front Panel Conguration Menu Access .............................................................. 18
3.3 Conguration Menu Explained ........................................................................... 20
3.4 Setting Up the Process Monitor Conguration ..................................................... 21
3.4.1 Alarms Conguration ................................................................................... 21
3.4.2 Analog Outputs Conguration ...................................................................... 24
3.4.3 Display Conguration .................................................................................. 26
3.4.4 Input Conguration ..................................................................................... 27
3.4.5 Pressure Conguration ................................................................................ 29
3.4.6 About Menu ................................................................................................ 30
Pura Advanced Online 2 Hygrometer Manual
Michell Instruments v
Figures
Figure 1 Unpacking – Monitor and Pura SEN, no block version ....................................2
Figure 2 Unpacking – Monitor and Pura OEM / PRM ...................................................3
Figure 3 Unpacking – Pura OEM & PRM – Single / Double Bag ....................................4
Figure 4 Pura Advanced Online 2 Components ...........................................................5
Figure 5 Monitor Display in Normal Operation ............................................................6
Figure 6 Electrical Wiring Schematic..........................................................................8
Figure 7 Pura SEN .................................................................................................11
Figure 8 Pura OEM, PRM ........................................................................................12
Figure 9 Sensor Connector Installation ....................................................................13
Figure 10 Sensor Block Connection ...........................................................................15
Figure 11 Inlet/Outlet Identication ..........................................................................16
Figure 12 Electrical Wiring Schematic........................................................................21
Figure 13 Alarm Conguration Screen Explained ........................................................21
Figure 14 Analog Outputs Conguration Screen Explained ..........................................24
Figure 15 Display Conguration Screen Explained ......................................................26
Figure 16 Input Conguration Screen Explained .........................................................27
Figure 17 Installation Location .................................................................................33
Figure 18 Installation Location .................................................................................33
Figure 19 Material Permeability Comparison ..............................................................35
Figure 20 Dead volume ............................................................................................36
Appendices
Appendix A Technical Specications .............................................................................. 39
A.1 Transmitters ................................................................................39
A.2 Monitors ..................................................................................... 41
Appendix B Process Monitor Register Map .....................................................................44
Appendix C Quality, Recycling & Warranty Information ................................................... 54
Appendix D Return Document & Decontamination Declaration ........................................ 56
4 MAINTENANCE ................................................................................................31
4.1 Maintenance and Calibration ............................................................................ 31
4.2 Fault Conditions ............................................................................................... 31
5 MEASUREMENT GUIDE ....................................................................................32
5.1 Sampling Considerations ................................................................................... 32
5.2 Sampling Hints ................................................................................................. 35
Pura Advanced Online 2 Hygrometer Manual
vi 97628 Issue 1, January 2023
Safety
The instrument is designed to be completely safe when installed and operated correctly in accordance
with the information provided in this manual.
This manual contains all the required information to install, operate and maintain this product. Prior
to installation and use of this product, this entire manual should be read and understood. Installation
and operation of this product should be carried out by suitably competent personnel only. The
installation and operation of this product must be in accordance with the instructions provided and
according to the terms of any associated safety certicates. Incorrect installation and use of this
product other than those described in this manual and other than its intended purpose will render
all warranties void.
This product meets the essential protection requirements of the relevant EU & UK directives. Further
details of applied directives may be found in the product specication.
Electricity and pressurized gas can be dangerous. This product must be installed and operated only
by suitable trained personnel.
!
No user serviceable parts inside
!
Where this hazard warning symbol appears in the following
sections, it is used to indicate areas where potentially hazardous
operations need to be carried out and where particular attention to
personal and personnel safety must be observed.
Where this symbol appears in the following sections it is used to
indicate areas of potential risk of electric shock.
This product is intended for use only under the following conditions:
a. indoor use
b. altitude up to 2 000 m
c. temperature 5 °C...40 °C
d. maximum relative humidity 80 % for temperatures up to 31 °C decreasing
linearly to 50 %, relative humidity at 40 °C
e. MAINS supply voltage uctuations up to ±10 % of the nominal voltage
f. TRANSIENT OVERVOLTAGES up to the levels of OVERVOLTAGE CATEGORY ll
g. TEMPORARY OVERVOLTAGES occurring on the MAINS supply
h. applicable POLLUTION DEGREE 2 of the intended environment
Pura Advanced Online 2 Hygrometer Manual
Michell Instruments vii
Electrical Safety
Ensure electrical safety is complied with by following the directions provided here and observing all
local operation & installation requirements at the intended location of use.
This product is completely safe when using any options and accessories supplied by the manufacturer
of this product for use with it. Refer to Section 2 (Installation) of this manual for further details.
Pressure Safety
For this product to operate satisfactorily, pressurized gas must be connected to it. Observe all the
information contained within this manual and all local operation & installation requirements at the
intended location of use. Refer to Section 2 (Installation) of this manual for further details.
Hazardous Materials (WEEE, RoHS3 & REACH)
This product does not contain or release any prohibited chemicals listed on the SVHC (Substances
of Very High Concern) Candidate List. During the intended normal operation of this product it is not
possible for the user to come into contact with any hazardous materials. This product is designed to
be recyclable except where indicated.
Repair and Maintenance
The instrument must be maintained either by the manufacturer or an accredited service agent. For
contact information visit the website at www.ProcessSensing.com.
Calibration
Periodic re-calibration is recommended in order to maintain the highest quality of measurement
in your application. Michell Instruments recommends that you have your Pura M12 transmitter re-
calibrated annually unless it is used in a mission-critical application or in a contaminated environment,
in which case the calibration interval should be reduced accordingly.
Michell Instruments can oer a variety of re-calibration and exchange transmitter schemes to suit
your specic needs. A local representative will be pleased to provide detailed custom advice.
Safety Conformity
This product meets the essential protection requirements of the relevant EU & UK directives. Further
details of applied standards may be found in Appendix C.
Pura Advanced Online 2 Hygrometer Manual
viii 97628 Issue 1, January 2023
Abbreviations
The following abbreviations are used in this manual:
AC alternating current
atm pressure unit (atmosphere)
barg pressure unit (=100 kP or 0.987 atm)
ºC degrees Celsius
ºF degrees Fahrenheit
DC direct current
dp dew point
ft foot (feet)
g gram(s)
Hz Hertz
“ inch(es)
lb pound
l/min liters per minute
m meter(s)
µm micro-meter
mA milliampere
max maximum
min minute(s)
MPa megapascal (Pascals x106)
Nl/min normal liters per minute
Nm Newton meter
ppmV parts per million (by volume)
rh relative humidity
scfh standard cubic feet per hour
V Volts
Ω Ohms
Pura Advanced Online 2 Hygrometer Manual
Michell Instruments 1
INTRODUCTION
1 INTRODUCTION
The Pura Advanced Online 2 Hygrometer is easy to install and congure; this versatile
touch screen hygrometer can measure and display dew point and moisture content and
indicate pressure. This display provides analog, digital and 4 programmable relay alarm
outputs with front screen or software app display conguration.
It has been developed as a premium-performance hygrometer system for use in a wide
variety of applications.
It can display data in °C or °F dew point, ppmV
, lb/mmscf or g/m3, from -120 up to -40 °C
(-184 up to -40 °F), at pressures up to 240 bar (3481 psi).
To calculate moisture content from dew point, it is necessary to know the system pressure.
This hygrometer can either compensate for pressure change by using a live pressure
sensor input, or accept a xed pressure input value.
1.1 Features
The Pura Advanced Online 2 Hygrometer oers customers the following features:
• Measures down to -120 °Cdp (-184 °Fdp) (1 ppbV)
• Stable and repeatable measurement
• Fast response
• Economical and advanced monitor solutions
• Dew-point or moisture content output
• 4...20 mA and Modbus RTU over RS485 outputs
• Traceable 7-point calibration certicate
• 1/2”, 1/4” male VCR process connections
• M12 electrical connectors
• Sensor exchange program
Pura Advanced Online 2 Hygrometer Manual
297628 Issue 1, January 2023
INSTALLATION
2 INSTALLATION
!
It is essential that the connection of electrical and gas supplies
to this instrument be undertaken by competent personnel.
2.1 Unpacking the Instrument
2.1.1 Unpacking Pura Advanced Online 2 Hygrometer
The Pura instruments and accessories are packed into a box and the method of unpacking
is shown as follows:
Figure 1
Unpacking – Monitor and Pura SEN, no block version
NOTE: Packaging specications are subject to continuous improvement, as
we reduce our use of plastics and move to cardboard packing systems.
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