Lauper Instruments Easidew Online User manual

Easidew Online
Dew-Point Hygrometer
User’s Manual
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Easidew Online Hygrometer
97094 Issue 20
May 2020
Gas-Detection
Lauper Instruments AG
Irisweg 16B
CH-3280 Murten
Tel. [phone]
[email protected]
www.lauper-instruments.ch

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© 2020 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.
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For Michell Instruments' contact information please go to
www.michell.com
Easidew Online

Easidew Online User’s Manual
iv 97094 Issue 20, May 2020
Contents
Safety ...............................................................................................................................vii
Electrical Safety ..........................................................................................................vii
Pressure Safety ...........................................................................................................vii
Toxic Materials ............................................................................................................vii
Repair and Maintenance ..............................................................................................vii
Calibration ..................................................................................................................vii
Safety Conformity .......................................................................................................vii
Abbreviations .................................................................................................................... viii
Warnings .......................................................................................................................... viii
1 INTRODUCTION ................................................................................................1
1.1 Features ............................................................................................................ 2
2 INSTALLATION ..................................................................................................3
2.1 Unpacking the Instrument ................................................................................... 3
2.1.1 Unpacking the Easidew Transmitter ................................................................ 4
2.1.2 Unpacking the Monitor .................................................................................. 4
2.1.3 Accessories Pack ........................................................................................... 5
2.2 Easidew Online Components ............................................................................... 5
2.3 Monitor .............................................................................................................. 6
2.3.1 Fault Conditions ............................................................................................ 6
2.3.2 Monitor Controls and Indicators ..................................................................... 7
2.3.3 Electrical Connections .................................................................................... 8
2.3.4 AC Power Supply Input ................................................................................ 10
2.3.5 DC Power Supply Input (Optional) ................................................................ 11
2.3.6 Transmitter Connection ................................................................................ 12
2.3.7 Signal Output Connections ........................................................................... 13
2.3.7.1 Alarm Outputs ..................................................................................... 13
2.3.7.2 Re-transmission Output ........................................................................ 13
2.3.7.3 RS485 Modbus RTU Communications Port ............................................... 13
2.3.8 Mounting the Monitor .................................................................................. 14
2.4 Easidew Transmitter ......................................................................................... 15
2.5 Preparation of the Transmitter Cable .................................................................. 16
2.5.1 Electrical Connections .................................................................................. 16
2.5.2 Sensor Cable Assembly ................................................................................ 17
2.5.3 Cable selection for self-assembled cables ...................................................... 18
2.5.4 Maximum Loop Resistance vs Supply Voltage ................................................ 18
2.6 Cable Connection ............................................................................................. 19
2.7 Transmitter Mounting ........................................................................................ 19
2.7.1 Transmitter Mounting – Sample Block (Optional) ........................................... 20
2.7.2 Transmitter Mounting – Direct Pipeline Connection ........................................ 21
2.7.3 Transmitter Mounting – With Additional Process Connection Adapter .............. 22
2.8 Mounting the Sample Block and Transmitter ....................................................... 23
2.8.1 Sample Block Gas Connections ..................................................................... 23
3 OPERATION ....................................................................................................25
3.1 General Operational Information ....................................................................... 25
3.2 Preparation For Operation ................................................................................. 26
3.2.1 First-Time Operation .................................................................................... 26
3.3 Monitor Setup .................................................................................................. 27
3.3.1 Change alarm type (high/low) ...................................................................... 27
3.3.2 Change alarm set-points .............................................................................. 29

Easidew Online User’s Manual
Michell Instruments v
3.3.3 Analog output: change from 4–20mA to 0–20mA .......................................... 30
3.3.4 Monitor Input Range .................................................................................. 30
3.3.5 Set the monitor to °F dew-point mode ......................................................... 31
3.3.6 Set the monitor to ppmV mode ..................................................................... 32
3.3.7 Monitor Limits When Unit Scaled to ppmV .................................................... 33
3.3.8 Alarm Set-Point Limit Conguration .............................................................. 34
3.3.9 Digital Communication Parameters Set-Up .................................................... 35
3.4 Modbus RTU over RS485 Communications .......................................................... 37
4 GOOD MEASUREMENT PRACTICE .....................................................................41
4.1 General Operational Guidelines ......................................................................... 41
4.2 Maintenance and Calibration ............................................................................ 43
4.2.1 Clean Monitor ............................................................................................ 43
Figures
Figure 1 Easidew Online Monitor and Transmitter .......................................................1
Figure 2 Unpacking Method ......................................................................................3
Figure 3 Transmitter Unpacking Method ....................................................................4
Figure 4 Monitor Unpacking Method ..........................................................................4
Figure 5 Accessories Pack ........................................................................................5
Figure 6 Easidew Online Components .......................................................................5
Figure 7 Monitor Panel Layout ..................................................................................6
Figure 8 Monitor Rear Panel Connections ..................................................................9
Figure 9 AC Power Supply Connections ...................................................................10
Figure 10 DC Power Supply Connections ...................................................................11
Figure 11 Transmitter Connections............................................................................12
Figure 12 Digital Communications Port ......................................................................13
Figure 13 Mounting the Monitor ...............................................................................14
Figure 14 Easidew Transmitter .................................................................................15
Figure 15 Easidew Transmitter .................................................................................17
Figure 16 Easidew Transmitter .................................................................................17
Figure 17 Maximum Load of Easidew – Including Cable Resistance .............................18
Figure 18 Connector Installation ...............................................................................19
Figure 19 Transmitter Mounting – Sensor Block .........................................................20
Figure 20 Transmitter Mounting – Pipe or Duct ..........................................................21
Figure 21 Transmitter Mounting with Adapter ...........................................................22
Figure 22 Sample Block Gas Connections ..................................................................23
Figure 23 Typical Display .........................................................................................26
Figure 24 Change Alarm Switching Logic ...................................................................28
Figure 25 Set-up Alarm Levels ..................................................................................29
Figure 26 Congure Analog Output ...........................................................................30
Figure 27 Span and Unit Settings .............................................................................31
Figure 28 Set-up Monitor (to read ppmV ) ...................................................................33
Figure 29 Set-up Alarm Set-Point Limits ....................................................................34
Figure 30 Set-up Data Communications Parameters ...................................................36
Figure 31 Installation Location .................................................................................41
Figure 32 Indication of Dead Space ..........................................................................41
Figure 33 Dimensions .............................................................................................47

Easidew Online User’s Manual
vi 97094 Issue 20, May 2020
Appendices
Appendix A Technical Specications ..............................................................................45
A.1 Dimensions .................................................................................47
Appendix B Quality, Recycling & Warranty Information ................................................... 49
Appendix C Return Document & Decontamination Declaration ........................................51
Tables
Table 1 Monitor Front Panel Controls and Indicators ..................................................7
Table 2 Summary of Electrical Connections ...............................................................9

Easidew Online User’s Manual
Michell Instruments vii
Safety
The manufacturer has designed this equipment to be safe when operated using the procedures
detailed in this manual. The user must not use this equipment for any other purpose than that
stated. Do not apply values greater than the maximum value stated.
This manual contains operating and safety instructions, which must be followed to ensure the safe
operation and to maintain the equipment in a safe condition. The safety instructions are either
warnings or cautions issued to protect the user and the equipment from injury or damage. Use
competent personnel using good engineering practice for all procedures in this manual.
Electrical Safety
The instrument is designed to be completely safe when used with options and accessories supplied
by the manufacturer for use with the instrument.
Pressure Safety
DO NOT permit pressures greater than the safe working pressure to be applied to the instrument.
The specied safe working pressure (SWP), for this instrument is 45 MPa (450 barg / 6500 psig).
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.
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.michell.com.
Calibration
The recommended calibration interval for this instrument is 12 months unless it is to be used in a
mission-critical application or in a dirty or contaminated environment in which case the calibration
interval should be reduced accordingly. The instrument should be returned to the manufacturer,
Michell Instruments Ltd., or one of their accredited service agents for re-calibration.
Safety Conformity
This product meets the essential protection requirements of the relevant EU and US directives.

Easidew Online User’s Manual
viii 97094 Issue 20, May 2020
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) gauge
bara bar absolute
°C degrees Celsius
°F degrees Fahrenheit
DC direct current
ft foot (feet)
g gram(s)
Hz Hertz
lbf-ft pound force per foot
Nl/min normal liters per minute
m meter(s)
mA milliampere
max maximum
min minute(s)
mm millimeter(s)
MPa megapascal (Pascals x106)
m/sec meters per second
Nm Newton meter
ppmV parts per million (by volume)
RS485 serial data transmission standard
Rx receive
scfh standard cubic feet per hour
scfs standard cubic feet per second
SWP safe working pressure
sec second(s)
temp temperature
V Volts
Ω Ohms
Warnings
The following general warnings listed below are applicable to this instrument. They are
repeated in the text in the appropriate locations.
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.
Where this symbol appears in the following sections it is used
to indicate areas of potential risk of electric shock.

Easidew Online User’s Manual
Michell Instruments 1
INTRODUCTION
1 INTRODUCTION
The Easidew Online dew-point hygrometer is an instrument designed for the continuous
online measurement of water dew point in gaseous sample streams, in a diverse range
of applications.
The system comprises a programmable monitor congured to accept a 4–20 mA current
loop signal from the Michell Easidew ceramic metal-oxide dew-point transmitter. The
span of the transmitter is set to cover the dew-point range -100 to +20ºCdp (-148 to
+68ºFdp) at operating pressures up to 45 Mpa (450 barg / 6500 psig).
The monitor also has a re-transmission facility which buers the transmitter output for
onward transmission to other systems. The transmitter input to the monitor is congured
as a 4–20 mA current loop signal and the re-transmitted output can be congured as
either a 4–20 mA or a 0–20 mA current loop signal (ranged as per the input).
Two alarm outputs are provided for connection to external systems. Alarm 1 provides
a set of single pole make contacts and Alarm 2 provides a set of changeover contacts.
Both sets are potential free and Alarm 1 contacts (single pole make) are rated at 250
V, 3 A and the Alarm 2 contacts (changeover) are rated at 250 V, 5 A.
A digital communications interface is also provided to enable retrieval of transmitter
values and fault status via Modbus RTU over RS485.
Figure 1 shows the monitor and the transmitter.
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Easidew Online Hygrometer
Figure 1 Easidew Online Monitor and Transmitter

Easidew Online User’s Manual
297094 Issue 20, May 2020
INTRODUCTION
1.1 Features
The Easidew Online Hygrometer is simple to use and install, and can be congured to
meet specic needs.
• 5/8” - 18 UNF process connections
• Dew-point or ppmV moisture content
• IP66 (NEMA 4) Sensor and IP65 (NEMA 12) Monitor (front panel only)
• Measurement range -100 to +20°C (-148 to +68°Fdp)
• Dual alarms
• Accuracy ±2°Cdp
• Clear and easy to read display
• Calibration certicate (traceable to NPL and NIST)
• 4–20mA re-transmission
• Modbus RTU over RS485 digital communications