Emerson HAS8xE-IM-ATEX User Manual

Instruction Manual
HAS8xE-IM-A TEX 08/2004
Instruction Manual
BINOS 100 F & MLT 2 Addendum for Pressurized Analyzers intended to be used in Hazardous Areas classified Zone 2
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BINOS 100 F & MLT 2 Addendum for Zone 2 Instruction Manual
HAS8XE-IM-ATEX
08/2004

ESSENTIAL INSTRUCTIONS

READ THIS P AGE BEFORE PROCEEDING!
Emerson Process Management (Rosemount Analytical) designs, manufactures and test s its products to meet many national and international standards. Because these instruments are sophisticated technical products, you MUST properly install, use, and maintain them to ensure they continue to operate within their normal specifications. The following instructions MUST be adhered to and integrated into your safety program when installing, using and maintaining Emerson Process Management (Rosemount Analytical) products. Failure to follow the proper instructions may cause any one of the following situations to occur: Loss of life; personal injury; property damage; damage to this instrument; and warranty invalidation.
Read all instructions prior to installing, operating, and servicing the product.
If you do not understand any of the instructions, contact your Emerson Process
Management (Rosemount Analytical) representative for clarification.
Follow all warnings, cautions, and instructions marked on and supplied with the product.
Inform and educate your personnel in the proper installation, operation, and
maintenance of the product.
Install your equipment as specified in the Installation Instructions of the appropriate
Instruction Manual and per applicable local and national codes. Connect all products
to the proper electrical and pressure sources.
T o ensure proper performance, use qualified personnel to install, operate, update, program, and maintain the product.
When replacement parts are required, ensure that qualified people use replacement parts specified by Emerson Process Management (Rosemount Analytical). Unauthorized parts and procedures can affect the product’s performance, place the safe operation of your process at risk, and VOID YOUR W ARRANTY. Look-alike substitutions may result in fire, electrical hazards, or improper operation.
Ensure that all equipment doors are closed and protective covers are in place, except when maintenance is being performed by qualified persons, to prevent electrical shock and personal injury.
The information contained in this document is subject to change without notice. Misprints reserved.
1st Edition 11/2003 2nd Edition 01/2004
3rd Edition 08/2004
© 2003-2004 by Emerson Process Management
Emerson Process Management GmbH & Co. OHG
Industriestrasse 1 D-63594 Hasselroth Germany T +49 (0) 6055 884-0 F +49 (0) 6055 884-209 Internet: www.EmersonProcess.com
ATEX Instruction Manual
HAS8xE-IM-ATEX January 2004
The purpose of this manual is to provide additional information concerning the components, functions, installation and maintenance of EEx p pressurized MLT 2 and BINOS installed and operated at hazardous locations, classified Zone 2, to measure FLAMMABLE, but NON-EXPLOSIVE gases or gas mixtures.
The user should become thoroughly familiar with the operation of this equipment before operating it.
Some sections may describe equipment not used in your configuration.
This ATEX instruction manual is a supplement to the analyzers standard instruction manual! In addition to this manual, the manuals of all devices necessary for operating the system must be observed. Read all manuals completely to be familiar with the operation of this equipment at hazardous locations.

PREFACE



100 F analyzers intended to be
MLT 2 / BINOS 100 F
Some technical specifications in this manual may be different to those in the associated manuals for the analyzers and additional equipment. In this case the technical specifications listed in this manual are valid only.
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The following definitions apply to WARNINGS, CAUTIONS and NOTES found throughout this publication.
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January 2004

DEFINITIONS

Highlights an operation or maintenance procedure, practice, condition, statement, etc. If not strictly observed, could result in injury, death, or long-term health hazards of personnel.
Highlights an essential operating procedure, condition or statement.
Highlights an operation or maintenance procedure, practice, condition, statement, etc. If not strictly observed, could result in damage to or destruction of equipment, or loss of effectiveness.
NOTE
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MLT 2 / BINOS 100 F
IMPORTANT

SAFETY INSTRUCTIONS

SAFETY SUMMARY
If this equipment is used in a manner not specified in these instructions, protective systems may be impaired.
PRODUCTS DESCRIBED IN THIS MANUAL SHALL NOT BE SUPPLIED WITH EXPLOSIVE GASES!
PRODUCTS DESCRIBED IN THIS MANUAL ARE NOT DESIGNED FOR USE IN ANY LIFE SUPPORT AND/OR SAFETY EQUIPMENT WHERE FAILURE TO PERFORM CAN REASONABLY BE EXPECTED TO RESULT IN PERSONAL INJURY OR DEATH.
AUTHORIZED PERSONNEL
To avoid loss of life, personal injury and damage to this equipment and on-site property, do not operate or service this instrument before reading and understanding this instruction manual and receiving appropriate training. SAVE THESE INSTRUCTIONS.
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MLT 2 / BINOS 100 F

TERMS USED IN THIS MANUAL

ATEX
Directive 94/9/EC, commonly called the ATEX („Atmosphères Explosibles“) products directive.
Area Classification
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Zone 1
Where ignitable concentrations of flammable gases can exist some of the time under normal operating conditions. (A guideline value [not part of a standard ] is 10 to 1.000 hours per year.) Equipment to be used in Zone 1 has to be classified Category 2.
Explosion Protection External Explosion Protection
The „External explosion protection“ serves to prevent penetration of explosive gas mixtures into the analyzer enclosure. In addition it avoids ignition on the surface. For this reason the analyzer is purged with protective gas and held at an internal overpressure compared to the surrounding atmosphere.
Zone 2
Where ignitable concentrations of flammable gases are not likely to exist under normal operating conditions. (A guideline value [not part of a standard ] is less than 10 hours per year.) Equipment to be used in Zone 2 has to be classified Category 3.
Internal Explosion Protection
The „Internal explosion protection“ serves to prevent ignition of gas being present in the analyzer’s Containment System (CS;= sample gas path). Dependent on the gas composition several options are available: None required (if gas is noncombustible), dilution by purge gas or/and internal overpressure of the analyzer’s enclosure compared to the CS.
Containment System
The part of the analyzer containing the gas that may constitute an internal source of release.
Lower Explosion Limit (LEL)
Volume ratio of flammable gas in air below which an explosive gas atmosphere will not be formed: the mixture of gas and air lacks sufficient fuel (gas) to burn.
Upper Explosion Limit (UEL) Volume ratio of flammable gas in air above which an explosive gas atmosphere will not be formed: the mixture of gas and air is too rich in fuel (deficient in oxygen) to burn.
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Terms used in this manual
Flammable Gas(es)
Gases and gas mixtures are assigned to be flammable if they might become ignitable when in a mixture with air.
Protective Gas
Air or inert gas used for purging and maintaining an overpressure and, if required, dilution.
Pre-Purging
The pre-purging phase serves to remove any combustible gas out of the analyzer’s enclosure prior to switching on the analyzer. During this time the housing is purged with 5 times its own volume.
Explosive Gas(es)
Gases and gas mixtures are assigned to be explosive if they consist of a flammable gas in a mixture with air and the concentration is inbetween the explosive limits.
Dilution
The continuous supply of a protective gas, after purging, at such a rate that the concentration of a flammable mixture inside the pressurized enclosure is maintained at a value outside the explosive limits except in a dilution area.
Pressurization Modes
Pressurization mode „Continuous Flow“
In EEx p „continuous flow mode“ the protective gas flows with higher rates through the enclosure. Flow rates are calculated to hold an overpressure of > 1 mbar compared to atmospheric.
Emerson Process Management Manufacturing GmbH & Co. OHG
Pressurization mode „Leakage Compensation“
In EEx p „leakage compensation mode“ just as much protective gas is used to hold an overpressure of > 1 mbar compared to atmospheric.
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TABLE OF CONTENTS

Preface P-1
Definitions ..................................................................................................................... P-2
Safety Instructions ...................................................................................................... P-3
Terms used in this manual ........................................................................................... P-4
SECTION 1
Technical Description 1-1
1-1 Application and Principle of Operation .......................................................... 1-1
1-2 unused .............................................................................................................. 1-2
1-3 Specification .................................................................................................... 1-3
1-3-1 Installation Site ................................................................................................... 1-3
1-3-2 Explosion Protection .......................................................................................... 1-3
1-3-3 Pressurization Conditions ................................................................................... 1-3
1-3-4 Purge Gas Conditions ........................................................................................ 1-4
1-3-5 Sample Gas Conditions ..................................................................................... 1-5
1-3-6 Differential Pressure Monitoring ......................................................................... 1-5
1-4 Additional Safety Measures ............................................................................ 1-6
SECTION 2
Installation 2-1
2-1 General ............................................................................................................. 2-1
2-2 Installation of the Unit...................................................................................... 2-1
2-3 Dimensional Drawings .................................................................................... 2-2
2-3-1 Single Enclosure Analyzer .................................................................................. 2-2
2-3-2 Dual Enclosure Analyzer ..................................................................................... 2-4
2-4 Connection of Sample Gas and Protective Gas (Purge Gas) ....................... 2-6
2-4-1 Hints on Flammable Gases ................................................................................ 2-7
2-4-2 MLT 2 Gas Flow Diagrams ................................................................................. 2-8
2-4-3 BINOS® 100 F Gas Flow Diagrams .................................................................. 2-10
2-5 Safety Device Settings .................................................................................. 2-13
2-6 Special Remarks and Instructions ............................................................... 2-13
2-7 Electrical Connections .................................................................................. 2-14
2-7-1 Cable Gland Assembly Instruction for Shielded Cables ..................................... 2-14
2-7-2 Mains Connection............................................................................................. 2-15
2-7-2-1 Purge System .................................................................................................. 2-15
2-7-2-2 Analyzer ........................................................................................................... 2-17
2-7-3 Pressurization System Alarm Contacts ............................................................. 2-17
2-7-4 Differential Pressure Switch(es) ....................................................................... 2-18
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SECTION 3
Startup 3-1
3-1 Final Check ...................................................................................................... 3-1
3-2 Switching On .................................................................................................... 3-1
SECTION 4
Maintenance 4-1
4-1 Maintenance Interval ....................................................................................... 4-1
4-2 Gasanalyzer ..................................................................................................... 4-1
4-3 Pressurization Systems and Other Additional Equipment ........................... 4-2
4-4 Verifications and Tests on Modified or Repaired Electrical Apparatus ....... 4-2
4-4-1 Preparations ...................................................................................................... 4-2
4-4-2 Overpressure Test .............................................................................................. 4-3
4-4-3 Leakage Test ..................................................................................................... 4-3
4-4-4 Removal of Modifications ................................................................................... 4-4
APPENDIX A-1
A-1 Declarations .....................................................................................................A-1
A-2 Circuit Diagrams .............................................................................................. A-3
A-2-1 MLT 2, single ...................................................................................................... A-3
A-2-2 MLT 2, dual ......................................................................................................... A-7
A-2-3 BINOS® 100 F .................................................................................................. A-11
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SECTION 1
Technical Description

1-1 Application and Principle of Operation

MLT 2 / BINOS 100 F
The gas analyzers of type BINOS 100 F and MLT 2 are intended to measure gas components within gas mixtures. In combination with an approbriate certified purge system (protection method „Pressurized Enclosure“ EEx p) they can be installed and operated in hazardous areas of Zone 2. Pressurization acts as external explosion protection and prevents external explosive atmosphere to penetrate into the analyzer by holding the enclosure at an overpressure compared to the surrounding The type of purge system used varies dependent on the area where the analyzer is intended to be installed. Both systems offer two modes of operation:
EEx p with continuous flow and
EEx p with leakage compensation.
Dependent on the sample gas composition it may be necessary to take care of internal explosion protection which refers to the sample gas path (containment system) in the analyzer.
One of the following protection methods is used:
Nonflammable gases and gas mixtures below the LEL: It must be
ensured that the sample gas in the containment system always remains below the lower explosive limit!
Flammable gases and gas mixtures
may be analyzed when the sample gas is diluted below ¼ LEL outside the analyzer, so the resulting sample gas is to be categorized „nonflammable“. The diluting system must ensure that the gas in the containment system always remains below ¼ LEL.
Flammable gases and gas mixtures
may be analyzed when the analyzer enclosure has an internal overpressure of > 50 Pa over the pressure in the containment system. To ensure this condition a differential pressure switch is used and connected between containment system and analyzer enclosure. In case the pressure decreases below the level of 50 Pa the switch is activated and may be used to activate an alarm or analyzer shut-off.
If more than one switch is needed because more than one flammable gas is supplied to the analyzer, the contacts of these switches have to be connected in series. Purge medium may be inert gas or air. Flame arrestors are required for all gas inlets and outlets carrying flammable gases.
Explosive gases must not be connected to the analyzer!
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1-2 Unused

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1-2 Instrument Layout
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1-3 Specification

1-3 Specification

1-3-1 Installation Site

Hazardous area: Zone 2 (Category 3),

1-3-2 Explosion Protection

MLT 2 / BINOS 100 F
Concepts:
Category 3: Pressurized enclosure
(EEx p) using simplified purge with either leakage compensation mode or continuous flow
Temperature class: T4

1-3-3 Pressurization Conditions

Volume of pressurized enclosure:
single enclosure: approx. 56 l dual enclosure: approx. 112 l
Pre-purge phase:
Duration: single enclosure: 5 minutes dual enclosure: 17 minutes
Options: Intrinsically safe (EEx i) digital,
analog, network or Foundation Fieldbus outputs.
Intrinsically safe (EEx i) para­magnetic Oxygen sensor or ther­mal conductivity sensor.
Applicable Standards:
EN 50014:1997 + amendments 1 & 2, EN 50016:1995, EN 50020:1994
Flow of protective gas:
single enclosure: 8 Nm³/h dual enclosure: 7 Nm³/h
Minimum overpressure during operation:
1 mbar against external Ex Zone and
>50 Pa against Containment System if
flammable gases are supplied.
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1-3-4 Purge Gas Conditions

1-3-4 Purge Gas Conditions
Purge gas: Inert gas (e.g. Nitrogen)
Air (from an ex-free zone)
Temperature: As ambient, but min. 20 °C to 35 °C.
Medium has to be dry and free from dust, oil, corrosive or aggressive components!
Input pressure at inlet of EEx p device: 3,000 to 4,000 hPa (3 to 4 bar)
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Minimum internal overpressure of the enclosure: 1 mbar
Maximum internal overpressure of the enclosure: 25 mbar
Pre-purging phase Single enclosure analyzer Dual enclosure analyzer
Duration of pre-purging phase: 5 min. 17 min.
Flow rate during pre-purging phase: 8 Nm³/h 7 Nm³/h
(= 133.4 l/min.) (= 117 l/min.)
Flow rate during pre-purging phase 22 Nm³/h 22 Nm³/h (@ 25 mbar overpressure): (= 367 l/min.) (= 367 l/min.)
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MLT 2 / BINOS 100 F

1-3-5 Sample Gas Conditions

1-3-5 Sample Gas Conditions
Applicable gases: Nonflammable gases or
gas mixtures which always Flammable gases remain below LEL
Maximum sample
gas pressure: atmospheric or atmospheric or
<1500 hPa at normal <1500 hPa at normal atmospheric pressure, atmospheric pressure, dependend on gas dependend on gas measuring principle measuring principle
and
overpressure < 13 mbar against surrounding atmosphere
Sample gas flow: for all sample gases refer to the corresponding analyzer data sheet

1-3-6 Differential Pressure Monitoring

For analyzers connected to flammable gases (either sample gas or span gas) the operator needs to ensure that the pressure within the containment system always remains at minimum 50 Pa below the pressure within the analyzer enclosure. This ensures that in case of a leak the flammable gas does not enter the enclosure. An additional differential pressure switch is provided to monitor the pressure difference: In case the pressure difference decreases below 50 Pa the contact opens.
It is the user’s responsiblity how to use the signal within his system: The limit of 50 Pa is the least permissible value given by the standards, higher values are acceptable, too. Flame arrestors are required for gas inlets and outlets. Electrical and mechanical connections are shown in section 2 „Installation“.
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1- Additional Safety Measures

1-4 Additional Safety Measures

Exhaust gas lines must end outside the hazardous area at a safe point. Sample gas lines may be returned to the sampling point.
If gas exhaust lines end within the hazardous area gas inlet and outlet have to be equipped with flame arrestors.
The maximum permissible gas pressure depends on the type of connected gas. See section 1-3-5 for detailed information.
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SECTION 2
Installation
Before starting to install this equipment, read the corresponding sections of the
analyzer’s instruction manual and the manuals of the additional equipment! Failure to follow the safety instructions could result in serious injury or death.

2-1 General

Proper functioning of the Emerson Process Management gas analyzers depends on proper installation. All procedures in this section, in the corresponding sections of the analyzer instruction manual and the manuals of the attached safety devices must be followed carefully.

2-2 Installation of the Unit

Install the assembled unit as described in the analyzer’s instruction manual: Refer to the dimensional drawings in this manual (fig. 2-1a/b and 2-2a/b) to ensure the designated location is dimensioned sufficiently. The weight of an assembled unit may be up to approx. 40 kg incl. pressurization system.
Take care to use anchors and bolts specified to be used for the weight of the units!
Take care the wall the unit is intended to be installed at is solid and stable to hold the units!
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2-3 Dimensional Drawings

2-3 Dimensional Drawings

2-3-1 Single Enclosure Analyzer

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Standard version w/o pressurization system
Fig. 2-1a
Single enclosure analyzer (dimensions in mm)
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MLT 2 / BINOS 100 F
2-3-1 Single Enclosure Analyzer
with Category 3 pressurization system
Fig. 2-1b
Single enclosure analyzer (dimensions in mm)
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2-3-2 Dual Enclosure Analyzer

2-3-2 Dual Enclosure Analyzer
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Standard version w/o pressurization system
Fig. 2-2a
Dual enclosure analyzer (dimensions in mm)
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MLT 2 / BINOS 100 F
2-3-2 Dual Enclosure Analyzer
with Category 3 pressurization system
Fig. 2-2b
Dual enclosure analyzer (dimensions in mm)
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MLT 2 / BINOS 100 F

2-4 Connection of Sample Gas and Protective Gas (Purge Gas)

2-4 Connection of Sample Gas and
Protective Gas (Purge Gas)
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When the analyzer with assembled EEx p safety device has been fixed, connect the gas lines according the diagram (fig. 2-3). The following conditions must be observed for trouble free operation:
The operator must ensure the minimum pressure of the protective gas at the point of installation. A pressure of 3,000 ... 4,000 hPa (3...4 bar) must be applied to the protective gas inlet of the EEx p safety device.
The EEx safety device is delivered with fixed basic parameters. The minimum purge gas pressure is preset to 14 mbar. Useful modifications such as increasing the max. purge gas pressure must only be done after studying the appropriate sections of the manual of the EEx p safety device.
Flammable sample gas must not be supplied to the analyzer until the pre­purging phase has ended.
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2-4-1 Hints on Flammable Gases

2-4-1 Hints on Flammable Gases
When applying flammable gases (either as sample gas or span gas) the corresponding gas inlets and outlets must be equipped with flame arrestors.
To avoid internal release of flammable gases the minimum pressure specified for the pressurized enclosure is at least 50 Pa higher than the maximum pressure specified for the containment system. A differential pressure switch is provided with the system to operate if the pressure difference falls below 50 Pa.
MLT 2 / BINOS 100 F
The 50 Pa limit is the value defined by the associated standards. It is not allowed to decrease this value but higher values are allowed and may be set dependent on the application and diffe­rential pressure switch used.
The purpose(s) for which the differential pressure switch is used (i.e. to activate disconnection of power or to sound an alarm or otherwise maintain the safety of the installation) is the responsibility of the user!
Take care of the possible formation of flammable mixtures due to the possibility of air penetration into the containment system and the resulting additional precautions that may be necessary.
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2-4-2 MLT 2 Gas Flow Diagrams

2-4-2 MLT 2 Gas Flow Diagrams
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Fig. 2-3a
Gas Flow Diagram
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2-4-2 MLT 2 Gas Flow Diagrams
2-4-2 MLT 2 Gas Flow Diagrams (cont’d)
MLT 2 / BINOS 100 F
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Fig. 2-3b
Gas Flow Diagram
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2-4-3 BINOS® 100 F Gas Flow Diagrams

2-4-3 BINOS® 100 F Gas Flow Diagrams
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Fig. 2-3c
Gas Flow Diagram
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2-4-3 BINOS® 100 F Gas Flow Diagrams
2-4-3 BINOS® 100 F Gas Flow Diagrams (cont’d)
MLT 2 / BINOS 100 F
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Fig. 2-3d
Gas Flow Diagram
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2-4-3 BINOS® 100 F Gas Flow Diagrams
2-4-3 BINOS® 100 F Gas Flow Diagrams
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Fig. 2-3e
Gas Flow Diagram
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2-5 Safety Device Settings

2-5 Safety Device Settings
MLT 2 / BINOS 100 F
The EEx safety device is delivered with fixed basic parameters. The purge gas pressure is preset to 14 hPa (rel.; for flammable gases). Useful modifications such as increasing the max. purge gas pressure must only be done after studying the appropriate sections of the manual of the EEx p safety device.

2-6 Special Remarks and Instructions

It is not allowed to change the internal purge medium path.
The pressurization system is provided with a bypass function to switch off the automatic monitoring facility. It is therefore also possible to switch on the pressurized system with the housing door open for setting work resp. to keep the analyzer powered even if the front door is opened.
The use of this function is intended for maintenance purposes only!
This facility should however only be used when it has been ascertained that there is no explosive atmosphere in the vicinity of the unit (fire safety certificate).
As the parameters are selected to be in conformance with the type test results, some of them are not allowed to be changed! This applies to the pre-purge time, which is adjusted to ensure a 5 times volume exchange within the analyzer enclosure at a preset purge medium flow!
When maintenance work has been finished is has to be verified that the bypass is turned off!
The pressurization system M code, preset to 0001, must be replaced by an individual code which must then be entered.
The pressurization system by-pass code, preset to 0002, should for safety reasons be replaced by an individual code, unequal Zero.
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MLT 2 / BINOS 100 F

2-7 Electrical Connections

2-7 Electrical Connections
Installation of and connecting the power supply lines and signal lines is permitted to qualified personnel only!
The standard EN 60079-14 „Electrical Installations in Hazardous Areas“ and all related standards have to be observed.
Failure to follow the proper instructions may cause any one of the following situations to occur: Loss of life; personal injury; property damage; damage to this instrument; and warranty invalidation.
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• All connections have to be done according to the schematics delivered together with the equipment.
A mains switch or ciruit-breaker must be provided at the building installation.
• The equipment enclosure must be connected to an earthing or equipotential bonding conductor.
• All cables introduced into the enclosure must be kept as short as possible.
• The cable glands are designed to fix single cables only, with diameters from 7 to 12 mm.
Use only shielded cables for signal lines! To ensure proper electromagnetic compatibility (EMC) it is recommended to follow the installation steps given below.

2-7-1 Cable Gland Assembly Instruction for Shielded Cables

1. Strip the cable insulation
2. Uncover the shielding
3. Feed cable through gland nut and into fixing element
4. Put the shielding net over the element the way that it covers the o-ring 2 mm.
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5. Stick the fixing element into the neck and fix the gland.
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2-7-2 Mains Connection
MLT 2 / BINOS 100 F

2-7-2 Mains Connection

Recommended standard mains connection is done by using separate cords for analyzer and pressurization system. This configuration allows to activate the safety device indepently from the analyzer to purge the analyzer enclosure before switching on.

2-7-2-1 Purge System

Remove the pressurization system control unit’s cover. The mains power line cord has to be connected to the terminals 7 (N) and 9 (L) , the PE conductor is connected to separated terminals in the lower left corner ot the enclosure (fig. 2-4).
In case of pressurization failure the analyzer will not be shut off!
If automatic shut off is required an external switch (relay), additional wiring and use of alarm contacts is needed!
Verify that the mains voltage at the point of installation meets the system nominal voltage!
Re-install the cover!
PE terminals
Fig. 2-4
Terminal location pressurization system control unit
Emerson Process Management Manufacturing GmbH & Co. OHG
Terminal 9 (L; Hi)
Terminal 7 (N; Lo)
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MLT 2 / BINOS 100 F
2-7-2 Mains Connection
2-7-2-2 Analyzer
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The mains power line cord has to be connected to the terminals provided at the analyzer enclosure’s inner left side, near the EMC line filter (fig. 2-5).
Fig. 2-5
Terminal location inside analyzer
Verify that the mains voltage at the point of installation meets the analyzer nominal voltage!
EMC line filter
Terminals
By default the analyzer has to be supplied separatly to the pressurization unit. This
Omitting the pre-purge sequence
The pre-purging sequence can be refrained if it is ensured that at the moment of activating the analyzer the atmosphere inside the enclosure and the appropriate pipes is well below 25 % LEL.
allows to shut on the safety device for pre­purging the analyzer, while this is still shut off!
It is the responsibility of the user to omit pre-purging!
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2-7-3 Pressurization System Alarm Contacts

MLT 2 / BINOS 100 F
In this case the analyzer mains cord may be connected to terminals 8 (L), 10 (N) and PE of the pressurization unit instead of connecting it to a mains outlet. So only one single outlet is required for the system.
2-7-3 Pressurization System Alarm Contacts
The pressurization control unit provides alarm contacts which are widely programmable. Refer to the unit’s instruction manual for information about available options and how to setup the contacts.
In each case applies:
In case of pressurization failure the analyzer will not be shut off!
If automatic shut off is required an external switch (relay), additional wiring and use of alarm contacts is needed!
The purpose(s) for which the alarm contacts are used (i.e. to activate disconnection of power or to sound an alarm or otherwise maintain the safety of the installation) is the responsibility of the user!
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2-7-4 Differential Pressure Switch(es)

2-7-4 Differential Pressure Switch(es)
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The contact of the differential pressure switch is connected to terminals X30 installed inside the analyzer. The contact opens if the differential pressure decreases below 50 Pa. To use this alarm contact the user must connect his external monitoring system to these terminals. Refer to the schematics in appendix to see how to connect the switch.
It is the responsibility of the user to connect other circuitry than specified for scanning the differen­tial pressure switch. Take into account the risk of igniting flammable gas by sparking contacts!
The contacts must be connected to signal circuitry (amplifier, relay) providing output signals according NAMUR resp. EN 50227 only. The standard specifies all essential data and operating conditions.
Consult factory for applicable circuitry which is available from various manufacturers.
The purpose(s) for which the differential pressure switch is used (i.e. to activate disconnection of power or to sound an alarm or otherwise maintain the safety of the installation) is the responsibility of the user!
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SECTION 3
Startup
Startup can only be done properly by personnel being familiar with the contents of all applicable manuals and related instructions!
Especially the warnings provided by the documentation have to be observed!

3-1 Final Check

Make sure that the analyzer and the related pressurization system have been setup as described in section 2 and all covers and doors are closed and fixed. All unused cable glands need to be sealed using the supplied approved sealing plug (part no. ETC00791; fig. 3-1) Unused cable gland openings in the enclosure need to be covered using a special screw (part no. ETC 000790; fig. 3-2).
Fig. 3-1
Cable gland sealing plug
Use only the components listed above as these are ATEX approved for use in hazardous areas!

3-2 Switching On

In a next step the analyzer may be powered by opening the purge gas supply and switching on the power supply.
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Fig. 3-2
Cable gland hexagon socket screw sealing plug
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SECTION 4
Maintenance
After maintenance or replacement of parts concerning explosion protection an authority on explosion protection has to verify that the analyzer still meets the requirements for explosion protection before it is switched on again.
If parts essential for explosion protection are repaired they have to be routine tested!
The authority has to issue a certificate for this and/or attach a test label to the equipment before startup after maintenance or replacement of parts.

4-1 Maintenance Interval

To ensure the performance and safety of the equipment it has to be checked on a regular basis, at least once a year. Special care has to be taken for the EEx p saftey device and parts ensuring explosion protection (e.g. gaskets).

4-2 Gasanalyzer

Refer to the associated manual for detailed information on maintenance, replacement of parts and how to carry out a containment system leak test.
It is the operators/owners responsibility to extend the maintenance interval with respect to negative influences of gases or environment on materials in contact with the sample gas or ensuring explosion protection (e.g. gaskets).
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4-3 Pressurization Systems and
Other Additional Equipment
Refer to the associated manuals for detailed information on maintenance and replacement of parts.
4-4 Verifications and Tests on
Modified or Repaired Electrical Apparatus
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Modifications made on the electrical apparatus affecting the integrity of the type of protection or the temperature of the apparatus shall be permitted only if the modified apparatus is resubmitted to a testing station.

4-4-1 Preparations

To do the routine tests the following steps have to be performed:
Disconnect the analyzer and the pressurization unit from power.
Seal the purge medium outlet at the pressurization unit (1“ opening at the left side).
Disconnect the containment system gas connectors from the external gas lines.
Disconnect one of the containment system gas connectors inside the analyzer and seal the other one.
In the case of repairs of electrical apparatus affecting the type of protection, the parts which have been repaired should be subjected to new routine verifications and tests. These test s need not necessarily be made by the manufacturer.
(Remark: Now it must be possible set the enclosure under pressure by applying an external gas (e.g. compressed air) to the gas connector.)
Connect an external source of compressed air as described in the drawing on the next page (fig. 4-1). The manometer needs to have a measuring range of 50 to 100 mbar with a resolution of 0.1 mbar. The flowmeter needs to have a measuring range of 10 l/min, resolution 0.1 l/min.
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Fig. 4-1
Setup for routine tests

4-4-2 Overpressure Test

A pressure of 37.5 mbar (= 1.5 times the maximum overpressure specified) has to be applied to the pressurized enclosure. To do this the following has to be performed:
Carefully apply a pressure of 37.5 mbar to the enclosure and hold this pressure for a period of 2 minutes +/- 10 seconds.
The test is considered to be satisfactory if no permanent deformation occures which would invalidate the type of protection. Keep the modifications to carry out the leakage test (sec. 4-4-3).

4-4-3 Leakage Test

The leakage of the enclosure has to be measured with an overpressure of 25 mbar applied to the pressurized enclosure. To do this the following steps have to be performed:
Make sure the modifications as described in the section 4-4-1are still existent.
Apply an overpressure of 25 mbar to the analyzer enclosure and take the reading of the flow meter.
The test is considered to be satisfacotry if the measured value is acceptable compared to the following values. Acceptable flow values are:
all analyzers: 3 l/minute maximum
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4-4-4 Removal of Modifications

Remove all the modifications described in section 4-4-1. Take special care of the gas connections to be tightend.
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A-1 Declarations

MLT 2 / BINOS 100 F

APPENDIX

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A-1 Declarations
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A-1 Declarations
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A-2 Circuit Diagrams

A-2-1 MLT 2, single

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A-2 Circuit Diagrams

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A-2-1 MLT 2 Circuit Diagrams
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A-2-1 MLT 2 Circuit Diagrams
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A-2-1 MLT 2 Circuit Diagrams
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A-2-2 MLT 2 Circuit Diagrams

A-2-2 MLT 2, dual

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A-2-2 MLT 2 Circuit Diagrams
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A-2-2 MLT 2 Circuit Diagrams
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A-2-2 MLT 2 Circuit Diagrams
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A-2-2 BINOS® 100 F Circuit Diagrams

A-2-3 BINOS® 100 F

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A-2-2 BINOS® 100 F Circuit Diagrams
MLT 2 / BINOS 100 F
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BINOS 100 F & MLT 2 Addendum Zone 2
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Emerson Process Management Rosemount Analytical Inc.
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Instruction Manual
HAS8xE-IM-A TEX
08/2004
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