Michell Instruments Promet I.S. User manual

Promet I.S.
Process Moisture Analyzer
User’s Manual
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Process Moisture Analyzer
Multi-Channel Control Unit
97221 Issue 5
March 2017

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© 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.
Promet I.S.
Process Moisture Analyzer
For Michell Instruments' contact information please go to
www.michell.com

Promet I.S. User’s Manual
iv 97221 Issue 5, March 2017
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 Performance Features ......................................................................................... 2
1.2 Applications ....................................................................................................... 2
1.3 Theory of Operation ........................................................................................... 3
1.4 System Components ........................................................................................... 4
1.4.1 User Interface............................................................................................... 5
1.4.2 Power Supply and Input/Output Signal ........................................................... 7
1.5 Sampling System................................................................................................ 8
2 INSTALLATION ..................................................................................................9
2.1 Unpacking the Analyzer ...................................................................................... 9
2.2 Operating Requirements ................................................................................... 10
2.2.1 Environmental Requirements ....................................................................... 10
2.2.2 Power Requirement..................................................................................... 10
2.3 Mounting ......................................................................................................... 10
2.3.1 Control Unit Installation............................................................................... 10
2.3.2 Mounting the Promet I.S. Sensor Assembly into the Sampling System............. 12
2.3.3 Sampling System Installation ....................................................................... 14
2.4 Wiring ............................................................................................................. 15
2.4.1 Overall Wiring Arrangement......................................................................... 15
2.4.2 Control Unit Wiring...................................................................................... 16
2.4.2.1 Power Supply Input Connection.............................................................. 18
2.4.2.2 Sensor Signal Input Connection.............................................................. 20
2.4.2.3 Analog Output Connection ..................................................................... 21
2.4.2.4 Alarm Output Connection....................................................................... 22
2.4.2.5 RS485 Port Connection.......................................................................... 23
2.4.3 Sensor Assembly Wiring .............................................................................. 24
2.4.3.1 Dew-point Transmitter Wiring................................................................. 24
2.4.3.2 Optional Pressure Transmitter Wiring...................................................... 27
3 OPERATION ....................................................................................................30
3.1 Preparation ...................................................................................................... 30
3.2 Start-Up........................................................................................................... 30
3.2.1 Function Keys Activation .............................................................................. 30
3.2.2 Powering-up the Analyzer ............................................................................ 31
3.2.2.1 Change Units ........................................................................................ 31
3.2.2.2 Manual Set Pressure Value..................................................................... 32
3.2.2.3 Display Brightness Adjustment ............................................................... 32
3.2.3 Sample Flow Start-Up.................................................................................. 32
3.3 Menu Structure ................................................................................................ 33
3.4 Main Reading Page ........................................................................................... 35
3.5 Display Set-Up ................................................................................................. 35
3.5.1 Pressure Unit Selection................................................................................ 35
3.5.2 Settings for the PPMV I (Ideal Gas) Reading ................................................. 36
3.5.3 Setting the Scrolling Interval for a Unit’s Full Name ...................................... 36
3.6 Fault Alarm Set-Up ........................................................................................... 37

Promet I.S. User’s Manual
Michell Instruments v
3.6.1 Minimum Dew-point Value for the Fault Alarm............................................... 37
3.6.2 Maximum Dew-point Value for the Fault Alarm .............................................. 38
3.6.3 Minimum Pressure Value for the Fault Alarm ................................................. 38
3.6.4 Maximum Pressure Value for the Fault Alarm................................................. 39
3.7 Output Set-Up.................................................................................................. 40
3.7.1 Output Source Selection .............................................................................. 40
3.7.2 Output Range ZERO Value Settings .............................................................. 41
3.7.3 Output Range SPAN Value Settings............................................................... 41
3.8 Alarm Set-Up ................................................................................................... 42
3.8.1 Alarm Set-Point Adjustment ......................................................................... 42
3.8.2 Alarm Type Selection ................................................................................... 42
3.8.3 Alarm Source Selection................................................................................ 43
Figures
Figure 1 Promet I.S. Control Unit..............................................................................1
Figure 2 Structure of the Michell Ceramic Moisture Sensor..........................................3
Figure 3 Major Components of the Promet I.S. ..........................................................4
Figure 4 User Interface ............................................................................................5
Figure 5 Dimensions of the Control Unit ..................................................................10
Figure 6 Rack Mounting Method .............................................................................11
Figure 7 Promet I.S. Sensor Assembly.....................................................................12
Figure 8 Overall Wiring Arrangement ......................................................................15
Figure 9 Control Unit Electrical Connections.............................................................17
Figure 10 POWER INPUT Socket...............................................................................18
Figure 11 POWER INPUT Connector Block.................................................................19
Figure 12 SENSOR INPUTS Connector Block..............................................................20
Figure 13 OUTPUT Connector Block..........................................................................21
Figure 14 ALARM Connector Block ............................................................................22
Figure 15 Crimped Wires .........................................................................................25
Figure 16 Cut to 5mm .............................................................................................25
Figure 17 Dew-point Transmitter Housing ................................................................25
Figure 18 Pin Assignment Drawing ...........................................................................26
Figure 19 Pressure Transmitter Connector.................................................................27
Figure 20 Removal of Terminal Block ........................................................................28
Figure 21 Pressure Transmitter Wiring Diagram .........................................................29
Figure 22 Units of Measurement Readings in Sequence..............................................31
Figure 23 Menu Maps ..............................................................................................34
Figure 24 Dimensional Drawings...............................................................................47

Promet I.S. User’s Manual
vi 97221 Issue 5, March 2017
Appendices
Appendix A Technical Specifications.............................................................................. 46
A.1 Dimensional Drawings.................................................................. 47
Appendix B Serial Communications............................................................................... 49
Appendix C Modbus RTU Comms ................................................................................. 54
Appendix D Hazardous Area Certification ...................................................................... 57
D.1 Product Standards ....................................................................... 57
D.2 Product Certification .................................................................... 57
D.3 Global Certificates/Approvals ........................................................ 57
D.4 Terminal Parameters .................................................................... 58
D.5 Special Conditions........................................................................ 58
D.6 Maintenance and Installation........................................................58
Appendix E System Drawings....................................................................................... 60
E.1 Baseefa Approved System Drawing ............................................... 60
E.2 FM Approved System Drawing ......................................................61
E.3 CSA Approved System Drawing..................................................... 62
Appendix F Quality, Recycling & Warranty Information................................................... 64
Appendix G Return Document & Decontamination Declaration........................................ 66

Promet I.S. 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. The input power supply voltage is 85 to 265 V AC
or 10 to 72 V DC. Refer to labels on instrument or calibration certificate.
Pressure Safety
DO NOT permit pressures greater than the safe working pressure, as defined in the published
specifications. to be applied to the instrument.
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. Refer
to www.michell.com for details of Michell Instruments’ worldwide offices contact information.
Calibration
The recommended calibration interval for the analyzer is 12 months (6 months or less for agressive
gases) depending on the application in which the instrument is used. Please consult Michell
Instruments for the specific calibration interval (refer to www.michell.com for details of Michell
Instruments’ worldwide offices contact information).
Safety Conformity
This product meets the essential protection requirements of the relevant EU and US standards
and directives. Further details of applied standards may be found in the Technical Specifications in
Appendix A.

Promet I.S. User’s Manual
viii 97221 Issue 5, March 2017
Abbreviations
The following abbreviations are used in this manual:
A Ampere
AC alternating current
barg pressure in bar (gauge)
°C degrees Celsius
°F degrees Fahrenheit
DC direct current
dp dew point
Hz Hertz
lb/MMscf pounds per million standard cubic feet
lbf-ft pound force per foot
mA milliampere
mg/m3milligrams per cubic meter
mm millimeters
Nl/min normal liters per minute
ppmVparts per million by volume
psig pressure in pound(s) per square inch (gauge)
scfh standard cubic feet per hour
T temperature
V Volts
W Watts
” inch(es)
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.

Promet I.S. User’s Manual
Michell Instruments 1
INTRODUCTION
1 INTRODUCTION
The Promet I.S. Process Moisture Analyzer is a continuous, on-line instrument for the
measurement of absolute moisture content in gas. It is designed to fulfil a wide range
of applications and provide for the monitoring and/or control of moisture in gas. The
instrument consists of two component parts: the control unit and the sensors’ assembly
(moisture transmitters and optional pressure transmitter). They are individually calibrated
to a single standard allowing for total interchangeability between combinations of
sensors and control units.
The instrument covers the ranges –100 to +20°Cdp ( -148 to +68°Fdp), 0 to 9999
ppmVas well as 0 to 1000 lb/MMscf and g/m3for natural gas. Selection of the displayed
moisture unit of measure is factory-set but may be easily changed by the user. Four
alarm relay contacts are provided which are user-configurable both in terms of set-point
and operating mode. Current output is factory set at 4-20 mA.
The Promet I.S. performs moisture content calculations based on the measured dew
point and the analysis pressure. The default setting of the monitor assumes atmospheric
pressure but the customer can set a fixed value of elevated pressure - for this to be
a valid method, the sensor must be installed at a constant, known analysis pressure.
Alternatively, there is an active pressure compensation option providing a loop-powered
intrinsically-safe pressure transmitter connecting to the second input channel on the
control unit, for dynamic pressure compensation.
The Promet I.S. Control Unit must be placed in a non-hazardous area suitable for
electronic analytical equipment. The moisture transmitter and optional pressure
transmitter can be positioned close to the process sample take-off point in Zone 0, Zone
1 or Zone 2 (Class I, Division 1, Groups A,B,C and D) hazardous area. The control unit
and transmitters are connected via a standard 2-wire instrumentation cable protected
by safety isolation interface units.
Figure 1 Promet I.S. Control Unit

Promet I.S. User’s Manual
297221 Issue 5, March 2017
INTRODUCTION
1.1 Performance Features
• State-of-the-art ceramic moisture sensor with chemically inert materials
coupled with physical resilience provides long-term reliability in the most
arduous applications. Robust construction also enables measurement
directly at process / pipeline pressure up to 45 MPa (450 barg/5801 psig).
• High integrity moisture measurement from ambient to ppb level with an
exhaustive list of hygrometric units, including key parameters of natural
gas.
• Two 4-20 mA output with configurable units / ranges. RS485 Modbus RTU
communication. Four built-in user-adjustable alarm contacts.
• Assured measurement accuracy with each sensor calibrated across the
entire measurement range and certified traceable to NPL (UK) and NIST
(USA).
• User-programmable or real-time active pressure compensation for
moisture content calculation.
• Certified intrinsically safe.
• Replaceable sensor element with Michell Calibration Exchange Service for
professional, scheduled and low cost recalibration to minimize downtime
and cost.
• Up to four independent measurement channels with any combination of
moisture in gas and moisture in liquid measurement at low per-channel
cost.
• Customized sampling systems to meet even the most demanding
applications.
1.2 Applications
• Natural gas production and processing
• Pipeline drying
• Offshore export pipeline natural gas
• Transmission pipeline monitoring
• Fiscal metering/custody transfer of gas
• Gas storage facilities
• Refinery recycle gas – reformer and platformer
• LNG production processing and receiving terminals

Promet I.S. User’s Manual
Michell Instruments 3
INTRODUCTION
1.3 Theory of Operation
The reliable and robust sensor design is fundamental to achieving accurate measurement
of moisture in process over a long period of time. Proprietary thick- and thin-film
techniques are applied in the Michell Ceramic Moisture Sensor. The inert materials of
the sensor have a high resistance to aggressive media while the inherent strength of
the sensor and the thermal bonded connections to the active device ensures reliable
operation.
Permeable Gold film
Hygroscopic Mono-layer
Base Electrode
Ceramic Substrate
g
g
g
g
Figure 2 Structure of the Michell Ceramic Moisture Sensor
The ceramic sensor responds to the partial pressure of water vapor in the gas being
measured, which is directly related to the dew-point temperature.
Calibration is certified traceable to NPL (UK) and NIST (USA) through the use of dew-
point transfer standards.
The firmware of the Promet I.S. incorporates dew point/pressure to moisture content
conversion data for ideal gas and natural gas. The calculation for natural gas uses either
the long established IGT research Bulletin No.8 or the more recently published ISO
18453, depending on the customer’s preference.

Promet I.S. User’s Manual
497221 Issue 5, March 2017
INTRODUCTION
1.4 System Components
The Promet I.S. Process Moisture Analyzer consists of:
• the sensor assembly
• the control unit
a
b
c


Sensor Assembly
Control Unit
(Up to four channels can have any combination of Promet I.S. and Liquidew I.S.*)
a Port for optional pressure transmitter
b Sensor block
c Dew-point transmitter
d User interface
e Electrical connections - to hazardous area
f Electrical connections - to non-hazardous area
Figure 3 Major Components of the Promet I.S.
* Liquidew I.S. is a sister product of the Promet I.S. used for moisture in liquid
measurement

Promet I.S. User’s Manual
Michell Instruments 5
INTRODUCTION
1.4.1 User Interface
The Promet I.S. user interface is located on the control unit. There is a two-line, six digit
(15 segment), LED display and four alarm indicators. Five push-button function keys
facilitate data display, parameter setting and system adjustment.
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Figure 4 User Interface
The operation of the function keys are shown below and more information can be found
in Section 3:
• Menu key:
Menu
The Menu key is used to enter and exit the set-up menu.
At any level within the set-up menu, press and hold the Menu
key to return to the default screen.
• Select key:
Select
The Select key is used to enter the sub-menu and to confirm the
selection.
• key:
The key is used to scroll up through pages in the top and sub-
level menus and to increase values in sub-level menus.

Promet I.S. User’s Manual
697221 Issue 5, March 2017
INTRODUCTION
• key:
The key is used to scroll down through pages in the top and
sub-level menus and to decrease values in sub-level menus.
• Display key
Display
The Display key is used to change the display unit (see Section
3.2.2).
The four LED alarm indicators will light up when the specific alarm relay is activated.
Settings for the alarm relays are explained in Section 3.8.

Promet I.S. User’s Manual
Michell Instruments 7
INTRODUCTION
1.4.2 Power Supply and Input/Output Signal
The terminal blocks for the power supply, signal input, signal output and alarm output
are located on the back panel of the control unit (as shown in Figure 9) .
• Power Supply
The Promet I.S. requires either 85 to 265 V AC or 10 to 72 V DC power input,
depending on the model ordered.
• Signal Input
There are two 4-20 mA signal input channels from the dew-point and optional
pressure sensors to the control unit. Both input channels are isolated by
built-in galvanic type I.S. barriers.
• Signal Output
There are two 4-20 mA linear signal output channels. The output channel 1 is
used for the dew point, moisture or pressure signal, with configurable ranges.
Output channel 2 has a fixed pressure signal and cannot be configured.
There is one RS485 Modbus RTU digital communication port. Refer to
Appendix B.
• Alarm Output
There are four alarm relays. Alarms 1 and 2 are Form C contacts rated 10A
/ 240 V AC or 8A / 24 V DC, non-inductive load. Alarms 3 and 4 are Form
A contacts rated 5A / 240 V AC or 4A / 24 V DC, non-inductive load. The
control actions and set points of these four alarms are user-programmable.
A fault alarm with adjustable set points is also included.

Promet I.S. User’s Manual
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INTRODUCTION
1.5 Sampling System
The Promet I.S. requires a clean sample of the gas mixture that meets the pressure and
flow requirements of the transmitter. The design of the sampling system will depend
on the specific application.
The requirements for the sample gas going into the sensor block are as follows:
• Temperature: -40 to +60°C (-40 to +140°F)
(-20 to +40°C (-4 to +104°F) recommended for optimum performance)
• Maximum pressure: 45 MPa (450 barg / 5801 psig)
• Flow rate: 1 to 5 Nl/min (2.1 to 10.6 scfh)
NOTE: Contact Michell Instruments if you wish to order a specific sampling
system.
Please refer to the Promet I.S. Premium Sampling System Instructions if a Michell
sampling system has been ordered with the Promet I.S.

Promet I.S. User’s Manual
Michell Instruments 9
INSTALLATION
2 INSTALLATION
It is essential that the installation of the electrical and gas
supplies to this analyzer be undertaken by suitably qualified
personnel.
2.1 Unpacking the Analyzer
Unpack carefully as follows:
a. Remove the accessories (if ordered).
b. If no accessories have been ordered the delivery should contain following
items:
• Promet I.S. control unit
• Promet I.S. sensor assembly (if a sampling system has been
ordered the sensor assembly should already be mounted in the
sampling system)
• User manual
• Certificates of calibration and conformity
• Power lead (only for 85 to 265 V AC version)
c. Remove the Promet I.S. sensor assembly from the box.
d. Lift out the control unit together with its end packing pieces.
e. Remove the end packing pieces and set the control unit down at the site
of installation. Save all the packing materials for the purpose of returning
the instrument to the manufacturer for service.
If ordered, the Promet I.S. Premium Sampling System will be shipped in a separate box.

Promet I.S. User’s Manual
10 97221 Issue 5, March 2017
INSTALLATION
2.2 Operating Requirements
2.2.1 Environmental Requirements
The Promet I.S. sensor assembly is intrinsically safe and designed to be installed on-
site, indoors or outdoors, directly at the point of measurement within a Hazardous
Area. The sensor assembly is ATEX and IECEx or CSA and FM certified (to be specified
at time of order). To operate correctly, the sensor assembly must be installed within
a suitable sampling system (Michell Instruments can supply standard and custom
designed sampling systems).
The Promet I.S. control unit is NOT designed for use in a Hazardous Area and should
only be installed in a safe area. The control unit is intended for indoor installation only
and operates within environmental limits of 0 to +50°C (+32 to +122°F) and <90%RH.
The control unit contains built-in isolation barriers permitting connection, direct from
the Hazardous Area, of the Promet I.S. sensor assembly.
2.2.2 Power Requirement
The Promet I.S. control unit can be ordered for either of the following electrical supplies:
• 85 TO 265 V AC, 47/63 Hz @ 4W max 10W
OR
• 10 to 72 V DC @ 4W max 10W
The Promet I.S. sensor assembly is powered through the 2-wire signal cable directly
from the control unit.
Please refer to the Promet I.S. Premium Sampling System Instructions for the power
requirement of the sampling system.
2.3 Mounting
2.3.1 Control Unit Installation
The Promet I.S. control unit is contained in a 19” sub-rack case (size 3U). It should
be installed in a 19” rack using the mounting holes provided. It should be placed in a
position free from any appreciable vibration and shaded from direct sunlight.
NOTE: The materials and construction of the control unit allow for operation
in an indoor, clean, non-hazardous only, control room environment.
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
483mm
(19”)
375mm + 100mm for cable clearance
(14.75” + 3.9”)
3U
132mm
(5.2”)
Figure 5 Dimensions of the Control Unit

Promet I.S. User’s Manual
Michell Instruments 11
INSTALLATION
Figure 6 Rack Mounting Method
Figure 6
illustrates the general method for fitting a rack mount instrument into a
standard 19” rack. To fit the unit proceed as follows:
a. Remove all terminal blocks for the electrical connections.
b. If necessary, remove any covers from the rack cabinet to gain access to
the rear and side.
c. Connect up the sensor input, analog and alarm output terminal blocks
to the internal rack wiring, ensuring that there is sufficient free cable to
permit withdrawal of the instrument from the rack.
d. Slide the instrument into the rack and support its weight while the four
fixing screws are inserted.
e. Ensure that the front panel of the instrument is flush and square with the
front of the rack and tighten the fixing screws.
f. Insert the terminal blocks into their respective sockets on the rear of the
instrument.
g. Connect the power supply cable and switch the ON/OFF switch to ON.
h. Re-fit any covers to the rack as necessary.
NOTE: Allow a minimum clearance depth of 100mm (4”) behind the instrument
housing for cables and vents.

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12 97221 Issue 5, March 2017
INSTALLATION
2.3.2 Mounting the Promet I.S. Sensor Assembly into the Sampling System
HIGH PRESSURE! High pressure gases are potentially hazardous.
Energy stored in these gases can be released suddenly and with
extreme force. High pressure systems should be assembled and
operated only by people who have been trained in proper safety
practices.
NOTE: If the analyzer has been ordered with a sampling system, the Promet
I.S. sensor assembly will have been installed and tested in the factory. In
that case disregard the following section and go to Section 2.3.3.
Figure 7 Promet I.S. Sensor Assembly
The Promet I.S. sensor assembly consists of:
1Dew-point transmitter - Easidew PRO I.S.
2Pressure transmitter (optional)
3Sensor block
To assemble, proceed as follows:
a. Remove the protective cap on the dew-point transmitter (Easidew PRO
I.S.) before installation and retain for future use. Take care to prevent any
contamination of the sensor before installation (do not touch or handle
the sintered guard - located on the tip of the Easidew PRO I.S.).