Michell Instruments ES20 Operating Manual
ES20
Compact Sampling System
User’s Manual
97447 Issue 2
December 2017
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ES20
Compact Sampling System
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www.michell.com
© 2017 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.
ES20 User’s Manual
Contents
Safety ................................................................................................................................vi
Electrical Safety ...........................................................................................................vi
Pressure Safety ............................................................................................................vi
Toxic Materials .............................................................................................................vi
Repair and Maintenance ...............................................................................................vi
Safety Conformity ........................................................................................................vi
Abbreviations .....................................................................................................................vii
Warnings ...........................................................................................................................vii
1 INTRODUCTION ............................................................................................VIII
1.1 Materials ......................................................................................................... viii
1.2 Filtration .......................................................................................................... viii
1.3 Pressure Control and Measurement ..................................................................... 1
1.4 Flow Control ..................................................................................................... 1
1.5 Mounting Variants ............................................................................................. 1
1.6 System Designs ................................................................................................. 1
1.7 System Confi gurations ........................................................................................ 2
1.8 Enclosure Confi gurations ..................................................................................... 3
2 INSTALLATION ..................................................................................................4
2.1 Sampling System Installation ............................................................................... 4
2.1.1 Relevant Manual Section for Installation.......................................................... 4
2.2 Process or Atmospheric Pressure With Particulate Filter ........................................ 5
2.2.1 Mounting Details ........................................................................................... 5
2.2.2 Gas Connections ........................................................................................... 5
2.2.3 Electrical Connections .................................................................................... 5
2.2.4 Power Supply ................................................................................................ 5
2.3 Process or Atmospheric Pressure With Coalescing Filter ........................................ 6
2.3.1 Mounting Details ........................................................................................... 6
2.3.2 Gas Connections ........................................................................................... 6
2.3.3 Drainage Connections .................................................................................... 6
2.3.4 Electrical Connections .................................................................................... 6
2.3.5 Power Supply ................................................................................................ 6
2.4 Vacuum Pressure With Particulate Filter .............................................................. 7
2.4.1 Mounting Details ........................................................................................... 7
2.4.2 Gas Connections ........................................................................................... 7
2.4.3 Electrical Connections .................................................................................... 7
2.4.4 Power Supply ................................................................................................ 7
2.5 Dew-Point Measurement System .......................................................................... 8
2.6 Monitor Installation ............................................................................................. 8
2.7 Process Connection ............................................................................................ 9
2.7.1 Transmitter Connection .................................................................................. 9
2.7.2 Monitor Connection ....................................................................................... 9
2.7.3 Terminal Rail Connection ............................................................................... 9
3 OPERATION ....................................................................................................10
3.1 Sampling Start-Up Procedure ............................................................................. 10
3.1.1 Relevant Manual Section for Operation ......................................................... 10
3.2 Process Pressure With Particulate Filter .............................................................. 11
3.2.1 Sample Flow 'Start-Up' Procedure ................................................................. 11
3.3 Process Pressure with Coalescing Filter .............................................................. 11
3.3.1 Sample Flow 'Start-Up' Procedure ................................................................. 11
3.4 Atmospheric Pressure with Particulate Filter........................................................ 12
3.4.1 Sample Flow 'Start-Up' Procedure ................................................................. 12
iv 97447 Issue 2, December 2017
ES20 User’s Manual
3.5 Atmospheric Pressure with Coalescing Filter ....................................................... 12
3.5.1 Sample Flow 'Start-Up' Procedure ................................................................. 12
3.6 Vacuum Pressure With Particulate Filter ............................................................ 13
3.6.1 Sample Flow 'Start-Up' Procedure ................................................................. 13
4 MAINTENANCE ................................................................................................14
4.1 General Maintenance Guidelines ........................................................................ 14
4.2 Filter Element Maintenance ............................................................................... 14
4.2.1 Particulate Filter Maintenance ..................................................................... 14
4.2.2 Coalescing Filter Maintenance ...................................................................... 16
4.3 Transmitter Maintenance ................................................................................... 18
Figures
Figure 1 Replacement of HDPE Guard .....................................................................19
Appendices
Appendix A Technical Specifi cations .............................................................................. 21
Appendix B Quality, Recycling & Warranty Information ...................................................23
Appendix C Return Document & Decontamination Declaration ........................................ 25
Michell Instruments v
ES20 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
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.
Refer to Appendix A, Technical Specifi cations.
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. Refer
to www.michell.com for details of Michell Instruments’ worldwide offi ces contact information.
Safety Conformity
This product meets the essential protection requirements of the relevant EU directives. Further
details of applied standards may be found in Appendix A, Technical Specifi cations.
vi 97447 Issue 2, December 2017
ES20 User’s Manual
Abbreviations
The following abbreviations are used in this manual:
AC alternating current
barg pressure unit (=100 kP or 0.987 atm)
ºC degrees Celsius
ºF degrees Fahrenheit
DC direct current
dp dew point
Hz Hertz
kg kilogram(s)
lb pound
Nl/min normal liters per minute
mA milliampere
max maximum
min minute(s)
% percentage
psig pounds per square inch
scfh standard cubic feet per hour
temp temperature
V Volts
W Watts
Ω Ohms
Warnings
The following general warning listed below is applicable to this instrument. It is 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.
Michell Instruments vii
1 INTRODUCTION
Michell Instruments designs and manufactures a broad range of sampling systems for a
wide spectrum of industries and processes from the economical compressed air market
to the oil and gas process market.
The ES20 Compact Sampling System (CSS) is a standard modular product designed to
appeal to customers who require an economic system delivered for fast integration into
their own work package.
Fast delivery is achieved through a simple modular build system on a single base plate
design completed with supply chain stocking of all required ES20 CSS parts.
The ES20 CSS is a standard fast delivery product, covering a small portion of the
Michell Instruments’ overall sampling system and process analyzer sampling system
capabilities.
1.1 Materials
To ensure continuous and reliable dew-point or moisture measurement it is important
that the dew-point transmitter is exposed to stable conditions of the gas to be monitored.
The ES20 CSS utilizes high quality materials which ensure that the sample gas travels
smoothly through the system.
Gas wetted parts:
• Stainless steel tube, fi lter housing and fi ttings (316 stainless steel)
• Filter element (borosilicate glass microfi bers)
• Transmitter sample block (316 stainless steel)
• Flowmeter (borosilicate glass) with Viton
• Pump (Tefl on
1.2 Filtration
If the gas contains impurities it is crucial to remove the contaminants before they reach
the sensing device. The ES20 CSS is supplied with a fi lter housing into which recyclable
particulate or coalescing fi lter cartridges can be inserted.
Filtration methods:
®
seals
®
)
• Particulate fi lter (solid contaminants)
• Coalescing fi lter with adjustable drain (solid and liquid aerosol
contaminants)
• HDPE guard (fi lter) for sensing element (standard)
• Air fi lter (with vacuum pump (standard)
ES20 User’s Manual
1.3 Pressure Control and Measurement
Pressure has a direct effect on dew point. The ES20 CSS utilizes a set of confi gurable
options for atmospheric or system line pressure dew-point measurement.
Pressure control features:
• Pressure gauge (dual scale: bar and psi)
• Isolation valves (needle valve type)
• Self-regulating vacuum pump
1.4 Flow Control
Flow rate of a gas can affect the transmitter’s accuracy and infl uence the systems’
response time. Every sampling system contains a set of components which help to
maintain optimum fl ows of 1 to 5 Nl/min (2.1 to 10.6 scfh).
INTRODUCTION
Flow control:
• Flowmeter (with particulate or coalescing fi lter)
• Isolation valves (needle valve type)
• Flowmeter with needle valve (with vacuum pump only)
1.5 Mounting Variants
Depending on the application the sampling system can be supplied in 3 variations:
• Mounted on base plate
• Mounted on base plate inside a windowed GRP enclosure
• Mounted on base plate inside a windowed SS enclosure (316 stainless
steel)
1.6 System Designs
The ES20 CSS can be supplied in various confi gurations and can be used with many
Michell products and accessories such as:
• Easidew Transmitter
• Easidew I.S. Transmitter
• Easidew PRO I.S. Transmitter
• Easidew Online Hygrometer
• Cermet II Hygrometer
• Cooling or venting coil
Michell Instruments 1
INTRODUCTION
1.7 System Confi gurations
ES20 User’s Manual
ES20 CSS fi tted with Particulate Filter
Components used Specifi cations
1 Base plate 316 stainless steel
Inlet process connection and
2
material
Outlet process connection and
3
material
6mm or ¼” fi tting (316 stainless steel)
6mm or ¼” fi tting (316 stainless steel)
4 Isolation valve Needle valve type
5 Filter housing
Particulate fi lter (inside fi lter
6
housing)
316 stainless steel (340 barg maximum),
gasket (Viton
Borosilicate glass microfi bres (99.5+% removal
of 0.1 micron particles)
®
)
7 Pressure gauge 0 to 20 barg (dual scale: bar and psi)
8 Sensor sample block 5/8” SS sample block (316 stainless steel)
9 Flowmeter
Borosilicate glass (2 to 12 Nl/min), seals
®
)
(Viton
10 Terminal rail 13 terminals
Process indicator mounting bracket
11
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ES20 CSS fi tted with Coalescing Filter*
Components used Specifi cations
12 Drainage connection 6mm or ¼” fi tting (316 stainless steel)
13 Coalescing fi lter (inside fi lter housing)
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ES20 CSS fi tted with Vacuum Pump*
Components used Specifi cations
14 Flowmeter with needle valve
15 Vacuum pump Anti-overpressure mechanism (Tefl on
16 Pressure gauge -1 to 1 barg
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Optional Dew-Point Measurement Device
Components used Specifi cations
17 Monitor
18
(to be ordered separately)**
Dew-Point Transmitter
ordered separately)**
(to be
Borosilicate glass (2 to 12 Nl/min), seals
®
(Viton
)
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2 97447 Issue 2, December 2017
ES20 User’s Manual
1.8 Enclosure Confi gurations
INTRODUCTION
Base Plate
457mm
350mm
2mm (D)
GRP Enclosure
530mm
430mm
200mm (D)
Stainless Steel Enclosure
500mm
400mm
200mm (D)
Michell Instruments 3
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