Rosemount 340 Trace Moisture Analyzer-Rev R Manuals & Guides

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Instruction Manual

081854-R May 2002

Model 340

Trace Moisture Analyzer

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ESSENTIAL INSTRUCTIONS

READ THIS PAGE BEFORE PROCEEDING!

Rosemount Analytical designs, manufactures and tests 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 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 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.

• To 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 Rosemount. Unauthorized parts and procedures can affect the product’s performance, place the safe operation of your process at risk, and VOID YOUR WARRANTY. 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.

Teflon® is a registered trademark of E.I. duPont de Nemours and Co., Inc. Viton® is a registered trademark of E.I. duPont de Nemours and Co., Inc. Freon12® is a registered trademark of E.I. duPont de Nemours and Co., Inc. SNOOP

Emerson Process Management

Rosemount Analytical Inc. Process Analytic Division

1201 N. Main St. Orrville, OH 44667-0901 T (330) 682-9010 F (330) 684-4434 e-mail: gas.csc@EmersonProcess.com

http://www.processanalytic.com

is a registered trademark of NUPRO Co.

Model 340

PREFACE...........................................................................................................................................P-1

Definitions ...........................................................................................................................................P-1

Safety Summary .................................................................................................................................P-2

General Precautions For Handling And Storing High Pressure Gas Cylinders .................................P-4

Documentation....................................................................................................................................P-5

1-0 DESCRIPTION AND SPECIFICATIONS..............................................................................1-1

1-1 Overview................................................................................................................................1-1

1-2 Instrument Configurations .....................................................................................................1-1

1-3 Sample Gases .......................................................................................................................1-4

a. Suitable Sample Gases ..................................................................................................1-4

b. Unsuitable Sample Gases ..............................................................................................1-4

1-4 Specifications ........................................................................................................................1-5

a. Performance....................................................................................................................1-5

b. Alarm Option (panel mount analyzers only)....................................................................1-5

c. Sample ............................................................................................................................1-5

Instruction Manual

081854-R May 2002

2-0 INSTALLATION ....................................................................................................................2-1

2-1 Facility Preparation................................................................................................................2-1

a. Outline and Mounting Dimensions ..................................................................................2-1

b. Interconnection Diagram (Explosion Proof Analyzers Only)...........................................2-1

c. Location...........................................................................................................................2-1

d. Utility Specifications ........................................................................................................2-1

2-2 Unpacking..............................................................................................................................2-2

2-3 Electrical Connections ...........................................................................................................2-2

a. Output Selection and Cable Connections for Potentometric Recorder ..........................2-5

b. Output Selection and Cable Connections for Current Recorder (AC Analyzers Only)...2-6

c. Alarm Output Connection and Alarm Function Selection (Optional, for Panel

Mounted Analyzers Only)................................................................................................2-7

d. Setting the Deadband .....................................................................................................2-8

e. Electrical Interconnection for Explosion Proof Analyzer .................................................2-8

f. Electrical Power Connection ...........................................................................................2-8

2-4 Sample Connections and Sample Handling recommendations ............................................2-9

2-5 Purge Connections and Requirements .................................................................................2-10

3-0 OPERATING CONTROLS AND INDICATORS....................................................................3-1

3-1 Range Selector Switch and Meter.........................................................................................3-1

3-2 Sample Flow Control Valve and Sample Flowmeter.............................................................3-1

3-3 Bypass Flow Control Valve and Bypass Flowmeter..............................................................3-1

3-4 Controls of Alarm Setpoint Accessory (Panel Mount Analyzers Only).................................3-1

Rosemount Analytical Inc. A Division of Emerson Process Management Contents i

Instruction Manual

081854-R May 2002

4-0 STARTUP..............................................................................................................................4-1

4-1 Systems Utilizing Pressurized Gas Sample ..........................................................................4-1

a. Initial Dry-Down...............................................................................................................4-1

b. System Leak Check ........................................................................................................4-3

c. Instrument Calibration .....................................................................................................4-4

d. Computation of Sample Flowmeter Settings ..................................................................4-4

e. Pressure (Elevation) Corrections To Computed Flowmeter Values ...............................4-6

f. Experimental Calibration of Sample Flowmeter..............................................................4-6

g. Temperature Corrections (Portable Analyzers Only)......................................................4-7

4-2 systems utilizing the low pressure sampling accessory ........................................................4-8

a. Calibration Procedure for Sample Flowmeter.................................................................4-9

b. Operating Parameter Selection.......................................................................................4-10

Vacuum Reading.............................................................................................................4-10

Sample Flowmeter Setting..............................................................................................4-10

c. Setup for Normal Operation ............................................................................................4-11

5-0 OPERATION .........................................................................................................................5-1

5-1 Recommended Calibration Frequency..................................................................................5-1

5-2 Shutdown...............................................................................................................................5-1

Model 340

6-0 THEORY................................................................................................................................6-1

6-1 Principle of Operation ............................................................................................................6-1

6-2 Flow System ..........................................................................................................................6-1

6-3 Electronic Circuitry.................................................................................................................6-3

a. Electrolytic Call and Switch Assembly (All Analyzers)....................................................6-3

b. Amplifier Circuit Board (All Analyzers)............................................................................6-3

c. Current Output Board (Optional for AC Analyzers Only) ................................................6-4

d. ±15 Volt Power Supply (AC Analyzers Only)..................................................................6-5

e. Alarm Setpoint Accessory and Universal Alarm Board (Optional, for Panel Mount

Analyzers Only)...............................................................................................................6-5

7-0 MAINTENANCE AND SERVICE ..........................................................................................7-1

7-1 Maintenance ..........................................................................................................................7-1

a. Care of the Electrolytic Cell.............................................................................................7-1

b. Replacing Electrolytic Cell ..............................................................................................7-1

c. Cleaning and Re-sensitizing Electrolytic Cell, Using PN 642257 Kit ..............................7-1

7-2 Service...................................................................................................................................7-3

a. Subnormal or Zero Meter Reading .................................................................................7-3

b. Off-Scale Meter Reading ................................................................................................7-3

c. Erratic Meter Reading .....................................................................................................7-3

8-0 REPLACEMENT PARTS ......................................................................................................8-1

8-1 Matrix .....................................................................................................................................8-1

8-2 Circuit Board Replacement Policy .........................................................................................8-2

8-3 Selected Replacement Parts.................................................................................................8-2

a. Door Assembly – Panel Mount Instruments ...................................................................8-3

b. Chassis Assembly...........................................................................................................8-4

c. 193005 Portable AC Trace Moisture Analyzer ...............................................................8-6

d. 194772 Flowmeter Accessory.........................................................................................8-8

ii Contents Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

9-0 RETURN OF MATERIAL ......................................................................................................9-1

9-1 Return Of Material .................................................................................................................9-1

9-2 Customer Service ..................................................................................................................9-1

9-3 Training..................................................................................................................................9-1

Figure 1-1. Panel Mounted Trace Moisture Analyzer .............................................................. 1-2

Figure 1-2. Explosion-Proof Trace Moisture Analyzer ............................................................. 1-2

Figure 1-3. Portable Trace Moisture Analyzer and Flowmeter Accessory............................... 1-3

Figure 2-1. Interior of Panel Mount Analyzer ........................................................................... 2-2

Figure 2-2. Interior of Explosion Proof Analyzer ...................................................................... 2-3

Figure 2-3. Amplifier Board – Location of Selector Plugs ........................................................ 2-3

Figure 2-4. Current Output Board - Location of Selector Plugs ............................................... 2-4

Figure 2-5. Universal Alarm Board (PN 193913) - Locations of Alarm Selector Plugs............ 2-4

Figure 2-6. Universal Alarm Board (PN 620695) – Location of Alarm Select Jumpers and

Figure 2-7. Connections for Potentiometric Recorder with Intermediate Span........................ 2-6

Figure 2-8. Installation of Purge Kit........................................................................................ 2-10

Figure 3-1. Operating Controls of Model 340 Panel Mount Analyzer ...................................... 3-2

Figure 3-2. Operating Controls of Explosion Proof Analyzer ................................................... 3-3

Figure 3-3. Operating Controls of the Portable Analyzer and Flowmeter Accessory .............. 3-3

Figure 4-1. Interconnection of Low Pressure Analysis System................................................ 4-8

Figure 5-1. Ice Point vs. Parts-Per-Million H

Figure 6-1. Schematic Diagram of Internal Flow System......................................................... 6-2

Figure 8-1. 194782 Door Assembly – Panel Mount Instrument............................................... 8-3

Figure 8-2. Chassis Assembly ................................................................................................. 8-5

Figure 8-3. 193005 Portable AC Trace Moisture Analyzer ...................................................... 8-7

Figure 8-4. 194772 Flowmeter Accessory ............................................................................... 8-8

Instruction Manual

081854-R May 2002

LIST OF ILLUSTRATIONS

Deadband Adjustment Potentiometer.................................................................... 2-5

O by Volume...................................................... 5-3

LIST OF TABLES

Table 2-1. Accessory Devices for Sample Pressure Ranges............................................... 2-11

Table 4-1. Typical Settings for Sample Flowmeter ................................................................. 4-4

Table 4-2. Normal Barometric Pressures for Various Elevations ........................................... 4-5

Table 5-1. Conversion Factors for Water Vapor Concentrations............................................ 5-2

Rosemount Analytical Inc. A Division of Emerson Process Management Contents iii

Instruction Manual

081854-R May 2002

193136 Installation Drawing - Model 340 Panel Mount 194745 Pictorial Wiring Diagram - Trace Moisture Analyzer, Portable AC 194749 Schematic Diagram - Portable DC 194754 Schematic Diagram - Trace Moisture Analyzer (sheet 1 only) 194757 Schematic Diagram - Trace Moisture Analyzer, Portable AC 194759 Interconnect Diagram - Trace Moisture Analyzer, Explosion Proof 194760 Schematic Diagram, Alarm Setpoint Assembly (sheet 3 only) 194761 Pictorial Wiring Diagram - Trace Moisture Analyzer, Panel Mount 194771 Board Assembly, Battery Pack 194775 Installation Drawing - Model 340 Portable 194789 Installation Drawing - Model 340 Explosion Proof 619710 Schematic Diagram - ±15V Power Supply 620696 Schematic Diagram - Universal Alarm 624265 Board Assembly, Amplifier (sheet 2 only) 654443 Schematic Diagram, Current Output Board 780213 Schematic Diagram, 230 VAC Operation 780796 Pictorial Wiring Diagram, 230 VAC Operation

Model 340

LIST OF DRAWINGS

iv Contents Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

The purpose of this manual is to provide information concerning the components, functions, installation and maintenance of the Model 340.

Some sections may describe equipment not used in your configuration. The user should become thoroughly familiar with the operation of this module before operating it.

Some sections pertain to models that are no longer available. This information is included for those instruments still in use.

Read and understand this instruction manual completely.

Instruction Manual

081854-R May 2002

PREFACE

DEFINITIONS

The following definitions apply to DANGERS, WARNINGS, CAUTIONS and NOTES found throughout this publication.

DANGER .

Highlights the presence of a hazard which will cause severe personal injury, death, or substantial property damage if the warning is ignored.

WARNING .

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.

CAUTION.

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

Highlights an essential operating procedure, condition or statement.

Rosemount Analytical Inc. A Division of Emerson Process Management Preface P-1

Instruction Manual

081854-R May 2002

SAFETY SUMMARY

If this equipment is used in a manner not specified in these instructions, protective systems may be impaired.

AUTHORIZED PERSONNEL

To avoid explosion, loss of life, personal injury and damage to this equipment and on-site property, all personnel authorized to install, operate and service the this equipment should be thoroughly familiar with and strictly follow the instructions in this manual. SAVE THESE INSTRUCTIONS.

DANGER.

Model 340

ELECTRICAL SHOCK HAZARD

Do not operate without doors and covers secure. Servicing requires access to live parts which can cause death or serious injury. Refer servicing to qualified personnel.

For safety and proper performance this instrument must be connected to a properly grounded three-wire source of power.

Alarm switching relay contacts wired to a separate power source must be disconnected before servicing.

WARNING.

POSSIBLE EXPLOSION HAZARD

This analyzer is of a type capable of analysis of sample gases which may be flammable. If used for analysis of such gases, the detection section of the analyzer must be either in an explosion proof enclosure suitable for the hazard classification of the gas, or protected by a continuous dilution purge system in accordance with Standard ANSI/NFPA-496-1986 (Chapter 8) or IEC Publication 792-1983 (Section Three).

If explosive gases are introduced into this analyzer, the sample containment system must be carefully leak checked upon installation and before initial startup, during routine maintenance and any time the integrity of the sample containment system is broken, to ensure that the system is in leak proof condition. Leak check instructions are provided in Section 4-1b, page 4-3.

Internal leaks resulting from failure to observe these precautions could result in an explosion, causing death, personal injury or property damage.

P-2 Preface Rosemount Analytical Inc. A Division of Emerson Process Management

Instruction Manual

Model 340

WARNING.

HIGH PRESSURE GAS CYLINDERS

Fuel, air and calibration gas cylinders are under pressure. Mishandling of gas cylinders could result in death, injury or property damage. See General Precautions for Handling and Storing High Pressure Cylinders, page P-4.

CAUTION

PARTS INTEGRITY

Tampering or unauthorized substitution of components may adversely affect safety of this product. Use only factory documented components for repair.

081854-R May 2002

Rosemount Analytical Inc. A Division of Emerson Process Management Preface P-3

Instruction Manual

081854-R May 2002

Model 340

GENERAL PRECAUTIONS FOR HANDLING AND STORING HIGH

PRESSURE GAS CYLINDERS

Edited from selected paragraphs of the Compressed Gas Association's "Handbook of Compressed Gases" published in 1981

Compressed Gas Association 1235 Jefferson Davis Highway Arlington, Virginia 22202

Used by Permission

1. Never drop cylinders or permit them to strike each other violently.

2. Cylinders may be stored in the open, but in such cases, should be protected against extremes of weather and, to prevent rusting, from the dampness of the ground. Cylinders should be stored in the shade when located in areas where extreme temperatures are prevalent.

3. The valve protection cap should be left on each cylinder until it has been secured against a wall or bench, or placed in a cylinder stand, and is ready to be used.

4. Avoid dragging, rolling, or sliding cylinders, even for a short distance; they should be moved by using a suitable hand-truck.

5. Never tamper with safety devices in valves or cylinders.

6. Do not store full and empty cylinders together. Serious suckback can occur when an empty cylinder is attached to a pressurized system.

7. No part of cylinder should be subjected to a temperature higher than 125 never be permitted to come in contact with any part of a compressed gas cylinder.

8. Do not place cylinders where they may become part of an electric circuit. When electric arc welding, precautions must be taken to prevent striking an arc against the cylinder.

F (52°C). A flame should

P-4 Preface Rosemount Analytical Inc. A Division of Emerson Process Management

Instruction Manual

Model 340

DOCUMENTATION

The following Model 340 instruction materials are available. Contact Customer Service Center or the local representative to order.

081854 Instruction Manual (this document)

081854-R May 2002

Rosemount Analytical Inc. A Division of Emerson Process Management Preface P-5

Instruction Manual

081854-R May 2002

Model 340

P-6 Preface Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

Instruction Manual

081854-R May 2002

SECTION 1

DESCRIPTION AND SPECIFICATIONS

1-1 OVERVIEW

The Model 340 Trace Moisture Analyzer automatically and continuously measures water vapor concentrations, up to a maximum of 1000 ppm, in a gaseous sample stream. The determination is based on the simultaneous absorption and electrolysis of water. The instrument has a wide range of applications, in monitoring many gases used in manufacturing processes. (Suitable and unsuitable sample gases are listed in Section 1-3, page 1-4.)

Permissible sample pressure range for the standard instrument is 10 to 100 psig. Optional sampling accessories permit monitoring gas streams at atmospheric or sub-atmospheric pressures.

The analyzer provides direct readout on a front panel meter and a selectable output for an accessory potentiometric recorder. With all AC operated versions of the analyzer, a selectable output for a current type recorder is obtainable through use of an optional plug in the circuit board.

2. The 193004 Explosion Proof Analyzer, Figure 1-2 on page 1-2.

NOTE

The Model 340 TMA Explosion Proof (PN

193004) is no longer available.

Designed for use in the chemical, petrochemical, and petroleum industries, in applications where the sample stream contains flammable gases, or where explosive vapors may be present at the installation site. Control section is similar to that of the Panel Mounted Analyzer. Detector section is contained in an explosion proof housing that meets the requirements for installation under hazardous conditions specified as Class 1, Group D, Division 1, in the National Electrical Code. Flow system is of stainless steel.

3. Portable Analyzer, Figure 1-3 on page 1-3.

1-2 INSTRUMENT CONFIGURATIONS

The Model 340 Analyzer is made in the following configurations:

1. Panel Mounted Analyzer, Figure 1-1 on page 1-2, with detector, electronic circuitry, and operating controls housed in a single purgeable case. Available with internal flow system of either stainless steel (193000 Analyzer) or brass (193001 Analyzer).

Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-1

The Model 340 TMA Portable (PN 193005) is no longer available.

Available for operation on either 115 VAC, 50/60 Hz (193005 Analyzer) or ±15 VDC from a self contained battery pack (193006 Analyzer).

Except where specifically stated otherwise, information in this manual applies to all versions of the instrument.

NOTE

Instruction Manual

081854-R May 2002

Alarm Setpoint Accessory

Model 340

Note: Illustration applicable to part numbers 193000 and 193001 Analyzers

Figure 1-1. Panel Mounted Trace Moisture Analyzer

Alarm Setpoint Accessory

Detector Section Control Section

Note: This instrument is no longer available – Consult Factory

Figure 1-2. Explosion-Proof Trace Moisture Analyzer

1-2 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

Instruction Manual

081854-R May 2002

Notes: Illustration applicable to part numbers 193005 and 193006 Analyzers

This instrument is no longer available – Consult Factory

Figure 1-3. Portable Trace Moisture Analyzer and Flowmeter Accessory

Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-3

Instruction Manual

081854-R May 2002

Model 340

1-3 SAMPLE GASES

WARNING

POSSIBLE EXPLOSION HAZARD

This analyzer is of the type capable of analysis of sample gases which may be flammable. If used for analysis of such gases, the detection section of the analyzer must be either in an explosion proof enclosure suitable for the hazardous classification of the gas , or, protected by a continuous dilution purge system in accordance with Standard ANSI /N FPA-496

-1986 (Chapter 8) or IEC Publication

79-2-1983 (Section Three).

Internal leaks resulting from failure to observe these precautions could result in an explosion causing death, personal injury or property damage.

Determination of whether a sample stream of a particular composition is suitable for monitoring depends on its compatibility with the construction materials in a) the detector cell, and b) the instrument flow system. In all instruments, the detector cell utilizes a thin film of phosphorous pentoxide (P rhodium electrodes. Depending on the intended application of a given instrument version, its internal flow system is constructed of either stainless steel (for corrosion resistance) or brass (for non-corrosive sample gases only).

2O6

) on

a. Suitable Sample Gases

Elemental Gases

Argon, Helium, Neon, Nitrogen, Oxygen, Hydrogen.

Inorganic Gaseous Mixtures and Compounds

Air, Carbon Dioxide, Carbon Monoxide, Sulphur Dioxide, Sulphur Hexafluoride.

Organic Gaseous Compounds

Butane, Ethane, Freon 12 , Methane, Propane, Halogenated Hydrocarbons.

b. Unsuitable Sample Gases

Gases that react with P206 to produce additional water

Example: alcohols, HF.

Gases that react with construction materials of the instrument

Gases that react with P

2O6

to alter required absorption characteristics of the P

2O6

film

Examples: ammonia, amines.

Gases that polymerize to form a solid or liquid phase (they gradually desensitize the detector cell by coating or clogging)

Example: Unsaturated hydrocarbons alkynes, alkadienes and alkenes.

Gases that contain particulate solid or liquid materials such as dust and dirt found in furnace atmosphere gases.

These must be avoided or filtered out upstream; oil mist or dust from some types of dryers can clog the detector cell or desensitize the P

film by forming a

2O6

layer over the film.

1-4 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

1-4 SPECIFICATIONS

a. Performance

Instruction Manual

081854-R May 2002

Ranges .......................................... 0 to 10, 0 to 50, 0 to 100, 0 to 500, 0 to 1000 ppm H

Accuracy........................................ ±5% of fullscale (not applicable to 0 to 10 ppm range or to

hydrogen or oxygen sample stream containing less than 25 ppm H

Sensitivity ...................................... Less than 1 ppm

Bypass Flow .................................. Adjustable of 0 to 2 cubic feet per hour (940 cc/min.) is standard in

non-portable instruments, and is obtainable for portable instruments through use of optional flowmeter accessory

Ambient Temperature.................... 0°F to 120°F (-18°C to 49°C)

Recorder Potentiometric Output.... All analyzers provide selectable output of 0 to 10 mV, 0 to 100 mV,

0 to 1 V, or 0 to 5 V

Recorder Current Output Option (for AC power analyzers only)

Plug-in circuit board provides 4 selectable outputs:

Output (mA) Maximum Permissible Load (ohms) 0 to 5 800 1 to 5 8000 4 to 20 2000 10 to 50 700

b. Alarm Option (panel mount analyzers only)

Setpoint Accuracy ......................... ±1/2 of fullscale, or 25 mV

Repeatability.................................. 1% of fullscale

Setpoint Range.............................. 0 to 100% or 0 to 5 VDC, displayed on front panel meter

Hysteresis...................................... 2% of fullscale is standard, adjustable by changing resistor on

circuit board

Output............................................ (1) isolated (2) 190 VDC or VAC maximum, (3) 1.5 amperes AC or

DC maximum

O by volume

c. Sample

Sample Flow Rate ......................... 100 cc/minute

Sample Pressure........................... Standard range 10 to 100 psig (69 to 690 kPa).

Low Pressure Sampling Accessory provides range of 10 inches mercury vacuum to +10 psig.

Sample Temperature..................... 32°F to 120°F (0°C to 80°C)

Sample Inlet/Outlet Connections... 1/8 inch bulkhead tube fittings (Double ferrule compression type)

Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-5

Instruction Manual

081854-R May 2002

Model 340

1-6 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

Instruction Manual

081854-R May 2002

SECTION 2

INSTALLATION

Sections 2-1a through 2-1d provide information that may be required prior to installation.

2-1 FACILITY PREPARATION

a. Outline and Mounting Dimensions

For significant dimensions of the instrument, refer to the appropriate Drawing at the back of the manual.

b. Interconnection Diagram (Explosion

Proof Analyzers Only)

Drawing 194759 shows electrical interconnection for the 193004 Explosion Proof Analyzer.

NOTE

Separate conduits should be used for the power cable and the interconnection cable.

c. Location

193000 and 193001 Panel Mounted Analyzers

Install in a clean area, not subject to excessive vibration or extreme temperature variations. Preferably, the instrument should be mounted near the sample stream, to minimize transport time.

193004 Explosion Proof Analyzer

Detector Section: Criteria for installation

site are proximity to sample point, protection from environment, and accessibility for servicing. Protect the unit adequately against shock and extreme vibration.

Control Section: Principal criteria for the installation site is that it must be outside the hazardous area. Hazardous locations are defined in Article 500 of the National Electrical Code. An additional consideration is convenience in taking readings and servicing the unit.

Ambient temperature range for all analyzers is 0°F to 120°F (-18°C to 49°C). Additional requirements, specific to the various analyzer configurations, are given in the following:

193000 and 193001 Panel Mounted Analyzers 193004 Explosion Proof Analyzer

193005 Portable Analyzer 107 to 127 VAC, 50/60 Hz, 20 watts

193006 Portable Analyzer ± 15 VDC from self contained battery pack

Rosemount Analytical Inc. A Division of Emerson Process Management Installation 2-1

d. Utility Specifications

Electrical power requirements are listed in the following table:

107 to 127 VAC 50/60 Hz, 80 watts

Instruction Manual

081854-R May 2002

Model 340

2-2 UNPACKING

Examine the shipping carton and contents carefully for any signs of damage. Save the carton and packing material until the analyzer is operational. If carton or contents damage (either external or concealed) is discovered, notify the carrier immediately.

2-3 ELECTRICAL CONNECTIONS

Depending on the particular options used, electrical setup may entail insertion of various selector plugs into appropriate positions in the associated circuit boards. Locations of circuit boards and other components within the several analyzer configurations are shown in Figure 2-1 below and Figure 2-2 on page 2-3. Locations of selector plugs on the individual board are shown in Figure 2-3 on page 2-3, Figure 2-4 on page 2-4, Figure 2-5 on page 24, and Figure 2-6 on page 2-5. Make electrical connections in the following sequence:

1. If a recorder is to be used, select the particular output required and make the appropriate cable connections as explained in Section 2-3a on page 2-5 (potentiometric recorder) or Section 2-3b on page 2-6 (current recorder). All analyzers provide potentiometric output. Current output is obtainable from AC operated instruments only, through use of the optional current output circuit board.

2. If an alarm system is to be used, select the desired function and connect the output as explained in Section 2-3c on page 2-7. Alarm output is obtainable from panel mounted instruments only, through use of the Alarm Setpoint Accessory and Universal Alarm Board in combination.

3. With Explosion Proof Analyzer, interconnect detector and control modules per Section 2-3e on page 2-8.

4. Supply electrical power to analyzer per Section 2-3f on page 2-8.

TB1 TB2

Partial view of inside door

±15V Power Supply

Alarm Setpoint Accessory

J5 (shorting plug shown)

Universal Alarm Board

Amplifier Board

Cell Holder

Figure 2-1. Interior of Panel Mount Analyzer

Sample Flowmeter

Bypass Flowmeter

2-2 Installation Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

Instruction Manual

081854-R May 2002

Figure 2-2. Interior of Explosion Proof Analyzer

CUR. BD.

YES

10 MV

100 MV

Current Board Yes/No

Potentiometric Output

Figure 2-3. Amplifier Board – Location of Selector Plugs

Rosemount Analytical Inc. A Division of Emerson Process Management Installation 2-3

Instruction Manual

081854-R May 2002

Recorder Milliampere Selector Plug Assembly

Live Zero/Dead Zero Selector

Model 340

LIVE ZERO DEAD

Note: The Current Output Board is an option for AC Analyzers only.

Figure 2-4. Current Output Board - Location of Selector Plugs

Normally Open/Normally Closed Selector Plug for High Level Alarm Function. Low level alarm function not used.

LOW

N.C.

N.O.

N.C.

N.O.

Figure 2-5. Universal Alarm Board (PN 193913) - Locations of Alarm Selector Plugs

2-4 Installation Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

Instruction Manual

081854-R May 2002

Alarm Selection

Deadband Adjustment

Figure 2-6. Universal Alarm Board (PN 620695) – Location of Alarm Select Jumpers and Deadband

Adjustment Potentiometer

a. Output Selection and Cable

Connections for Potentometric Recorder

To use a potentiometric recorder:

1. At multi-pin receptacle on amplifier circuit board, Figure 2-3 on page 2-3, insert two shorting plugs as follows:

a. Insert plug between pair of pins

designated NO in area marked CUR. BD. YES/NO. (This connection routes amplifier output signal through voltage divider, as explained in Section 6-3c on page 6-4.)

b. Insert plug between pair of pins

with labeled designation that corresponds to desired output. Options are 10 mV, 100 mV, 1 volt, and 5 volts.

2. Connect appropriate leads of shielded recorder cable to POT. REC. and terminals, and SHLD terminal, on output terminal strip.

3. Connect recorder end of output cable as required for the particular recorder span:

a. For recorder with span of 10 mV,

100 mV, 1 volt, or 5 volts, connect cable directly to recorder input terminals, making sure polarity is correct.

b. For recorder with an intermediate

span, i.e., between the specified values, connect cable to recorder via a suitable external voltage divider, as shown in Figure 2-7 on page 2-6.

Rosemount Analytical Inc. A Division of Emerson Process Management Installation 2-5

Instruction Manual

081854-R May 2002

Model 340

R1 Output Cable From Trace Moisture Analyzer

Voltage Divider

(Customer Supplied)

Output Selected on

Amplifier Board

10 MV

100 MV

1V 5V

Example: To permit use of 50 mv recorder, 100 mv output is selected on Amplifier Board; 500 ohm resistors are used for R1 and R2.

Figure 2-7. Connections for Potentiometric Recorder with Intermediate Span

Min. Permissible

Resistance R1 plus R2

100 ohms

1,000 ohms 10,000 ohms 50,000 ohms

Input Terminals

Potentiometric

Recorder

b. Output Selection and Cable

Connections for Current Recorder (AC Analyzers Only)

To use a current recorder:

1. Connect appropriate leads of shielded recorder cable to CUR. REC. and "-" terminals, and SHLD terminal, on output terminal strip. For location of terminal strip, refer to appropriate

Recorder Span (ma) Maximum Permissible Load (ohms)

0 to 5 800 1 to 5 8000

4 to 20 2000

10 to 50 700

2-6 Installation Rosemount Analytical Inc. A Division of Emerson Process Management

illustration of Figure 2-1 through Figure 2-6.

2. Connect recorder end of output cable to recorder input terminals, making sure polarity is correct.

NOTE

Combined resistance of recorder and associated interconnection cable must not exceed value in following table.

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3. At multi-pin receptacle on amplifier circuit board, Figure 2-3 on page 2-3, insert shorting plug between pair of pins designated YES in area marked CUR. BD. YES/NO. (This connection routes amplifier output signal through current output board.)

4. Verify that current output board is properly in place in its connector.

5. On current output board, Figure 2-4 on page 2-4, insert two plugs in their receptacle, in the position appropriate to the desired recorder:

a. Live Zero/Dead Zero Selector: For

0 to 5 mA recorder, orient plug so its arrow points to end of receptacle labeled DEAD. For 1 to 5, 4 to 20, or 10 to 50 ma recorder, orient plug so arrow points to end labeled LIVE.

b. Recorder Milliampere Selector:

Orient plug so that the side with the labeled designation corresponding to the desired ma current range faces outward, and covers the REC MA label on the current output board. Sides of plug are labeled 0-5, 1 -5, 4-20, and 10-50.

c. Alarm Output Connection and Alarm

Function Selection (Optional, for Panel Mounted Analyzers Only)

The optional Alarm Setpoint Accessory and Universal Alarm Board are used in combination to provide an alarm output that actuates an external, customer supplied alarm and, or process control device whenever the water vapor concentration of the sample stream exceeds a pre-selected level.

If so specified, the analyzer is factory assembled to include the Alarm Setpoint Accessory and Universal Alarm Board. Alternatively, these two items are obtainable in the form of the 630695

Alarm Kit, intended for subsequent installation in an analyzer not originally equipped with alarm function.

Setup procedure for alarm systems is described in the following steps. If internal alarm components have been installed previously in the analyzer, proceed directly to Step 4; otherwise, first perform Steps 1 through 3.

1. Mount Alarm Setpoint Accessory in cutout in analyzer door. Refer to appropriate illustration of Figure 1-1 through Figure 1-3.

2. Refer to Figure 2-1 on page 2-2. At receptacle J5 remove shorting plug. Insert plug P5 of multi-conductor cable from Alarm Setpoint Accessory into J5.

3. Insert Universal Alarm Board into corresponding connector. Refer to appropriate illustration of Figure 2-1, or Figure 2-2.

4. Connect input leads from external alarm system to ALARM OUTPUT terminals on terminal strip TB1. For location of terminal strip, refer to appropriate illustration of Figure 2-1 or Figure 2-2.

5. At multi-pin receptacle on universal alarm board, Figure 2-5 on page 2-4 or Figure 2-6 on page 2-5, insert the function jumper in the position appropriate to the desired alarm function.

a. If ALARM OUTPUT terminals are

to provide a normally open circuit, place jumper El in the A, B position. The ALARM OUTPUT circuit will now close when water vapor content exceeds preselected level.

b. If ALARM OUTPUT terminals are

to provide a normally closed circuit (as in a fail-safe system), insert jumper El in the C, D position. The

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ALARM OUTPUT circuit will now open when water vapor content exceeds the pre-selected level

NOTE

In Trace Moisture Analyzers, the LOW N.O. and LOW N.C. positions are normally not used.

Selection of the desired alarm setpoint is explained in Section 3-4 on page 3-1.

d. Setting the Deadband

The desired deadband may be set with the appropriate adjustment of R4 on the Universal Alarm Board (Figure 2-6 on page 2-5). The deadband may be adjusted from 2% of fullscale (counterclockwise limit) to 10% of fullscale (clockwise limit).

e. Electrical Interconnection for

Explosion Proof Analyzer

Interconnect detector and control modules as shown in Drawing 194759. The PN 835495 Interconnection Cable is supplied, as ordered, in any desired length up to a maximum of 1000 feet (305 M).

Within the detector module, a user supplied 14 gauge ground lead must be connected to the marked ground terminal and securely attached to a suitable earth ground.

CAUTION

The explosion proof detector module must be wired in accordance with the requirements of the National Electrical Code (NEC) (NFPA No. 70) for Class 1, Group D, Division 1 hazardous locations, especially Sections 501 -4 and 501 -5, and any other applicable national and/or local codes.

f. Electrical Power Connection

DANGER

ELECTRICAL SHOCK HAZARD

For safety and proper performance AC instruments must be connected to a properly grounded three wire source of electrical power.

AC Analyzers. Connect to an AC source of 107 to 127 volts, either 60 ±0.5 Hz or 50 ±0.5 Hz Panel mounted instruments require field wiring by installer. Portable AC analyzer has integral North American 3 prong power cord. If power outlet does not have third (ground) contact, use an adapter to provide proper grounding.

Portable DC Analyzer. Insert battery pack in place.

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2-4 SAMPLE CONNECTIONS AND SAMPLE

HANDLING RECOMMENDATIONS

Locations of sample inlet and outlet ports in the various analyzer configurations are shown in the engineering drawings located at the back of the manual. All analyzers have 1/8 inch bulkhead, compression type tubing fittings.

A suitable gas handling system is required to deliver sample to the analyzer at the proper pressure and flow rate. Acceptable sample pressure range for the standard analyzer is 10 to 100 psig. A sample pressure outside this range necessitates installation of an appropriate accessory. Refer to Table 2-1.

Accessory Devices for Sample Pressure

Ranges on page 2-11.

Although installation of a sampling system is essentially straightforward, problems resulting from an improperly designed system can have a highly adverse effect on analyzer performance. Therefore, special care in planning the installation is required to ensure maximum reliability and accuracy.

In designing a sample system, refer to the following general rules, which are applicable to all installations and all analyzer configurations.

1. Use of stainless steel tubing throughout is strongly recommended. Its smooth walls and passive surfaces minimize moisture adsorption. Other metals, and plastics, increase system response time and decrease accuracy. Some plastics are entirely unsatisfactory, because of permeability to water vapor.

solution) through tubing until effluent is essentially colorless.

c. Rinse with water and then with

acetone.

d. Purge with clean, dry, nitrogen or air.

3. Minimize internal surface area of sample system by using minimum length, minimum diameter lines. Generally, 1/8 inch o.d. tubing is recommended.

4. Provide high velocity sample flow. Where pressure reduction is required before sample enters the instrument, an important factory is to locate the pressure regulator as near the process stream as possible.

5. Use minimum number of valves and fittings, each is a potential source of leaks.

6. Select components for minimum leakage and moisture absorption. With pressure regulators: (a) advise manufacturer of extreme low leakage requirements, (b) choose units with metallic, not elastomeric, diaphragms. Use packless valves wherever possible. Where pipe fittings are required, seal with Teflon tape, not pipe thread compound.

7. Avoid dead ended passages, voids, and blind holes. They permit accumulation of stagnant gases, resulting in sluggish system response.

2. Tubing and other components in contact with sample must be scrupulously clean. Dirt and oil absorb water. Recommended cleaning procedure for tubing is as follows:

a. Wash with acetone.

b. Pass cleaning solution (10% nitric acid

and 5% hydrofluoric acid in aqueous

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2-5 PURGE CONNECTIONS AND REQUIRE-

MENTS

If required for safety, the detector and/or control section(s) of any non-portable

A. Option with Flow Indicator B. Option with Pressure Indicator or Alarm

Affix Warning Label

Analyzer Door

190697 Purge Inlet Fitting

Flow Indicator

191342 Purge Outlet Fitting

Purge Supply

Components in dashed line are supplied by customer.

Affix Warning Label

Analyzer Door

instrument except the Explosion Proof Analyzer may be purged with clean, dry air or suitable inert gas. For locations of purge fittings, refer to the Outline and Mounting Dimension Drawings located at the back of the manual.

190697 Purge Inlet Fitting

Purge Supply

191342 Purge Outlet Fitting

Pressure Indicator or Alarm

Figure 2-8. Installation of Purge Kit

If equipped with PN 191343 optional air purge kit and installed with user provided components per these instructions, the analyzer may be located in a Class 1, Division 2 area as defined by the National Electrical Code (ANSI/NFPA 70). This kit is designed to provide Type Z protection in accordance with Standard ANSI/NFPA 496-1986, Chapter 2,

flammable samples the analyzer must be equipped with a continuous dilution purge system in accordance with ANSI/NFPA 496-1986 Chapter 8 or IEC Publication 79-2 (1983) Section Three. Consult factory for recommendations on sample flow limitations and minimum purge flow requirements. This kit consists of the following items:

when sampling nonflammable gases. For

PART NUMBER DESCRIPTION

190697 Purge Inlet Fitting 191342 Purge Outlet Fitting 082787 Warning Label 856156 Sealant

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Installation options are shown in Figure 2-8 on page 2-10. Use only clean, dry, air or suitable inert gas for the purge supply. Recommended supply pressure is 20 psig., which provides a flow of approximately 4 liters per minute (8.4 cfh), and a case pressure of approximately

0.2 inch H20 (50 Pa). With a flow rate of 4

liters per minute, four case volumes of purge gas pass through the instrument case in ten minutes.

SAMPLE PRESSURE ACCESSORY DEVICE

Low Pressure Sampling Accessory

10 inches Hg vacuum to + 10 psig

10 to 100 psig None required. 100 to 2500 psig A suitable pressure reducing regulator.

Table 2-1. Accessory Devices for Sample Pressure Ranges

(630600 Accessory, for 60 Hz operation; or 630601 Accessory, for 50 Hz operation)

All conduit connections through the instrument case must be sealed thoroughly with a suitable sealant. The sealant, to be applied from the interior of the case, must thoroughly cover all exiting leads as well as the conduit fitting.

NOTE

The warning label must be attached by the user in order to conform to requirements of the standard.

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SECTION 3

OPERATING CONTROLS AND INDICATORS

Preparatory to startup and operation, it is recommended that the operator familiarize himself with the instrument controls, described in this section.

All Trace Moisture Analyzers incorporate similar operating controls; however, locations of these controls differ in the various instrument configurations. Refer to appropriate illustration of Figure 3-1 on page 3-2, Figure 3-2 on page 3-3, and Figure 3-3 on page 3-3.

3-1 RANGE SELECTOR SWITCH AND METER

The Range Selector Switch provides a choice of five operating ranges: 1000, 500, 100, 50 or 10 ppm. Range designations signify the value of a fullscale meter reading, in parts per million of water by volume (v/v). The meter scale is calibrated from 0 to 100%.

The STDBY position deactivates instrument readout, but maintains the electronic circuitry in energized condition, permitting immediate resumption of operation when Range Switch is turned to a numbered position. In standby mode, current flows continuously through the electrolytic cell to keep it dry.

CAUTION

SAMPLE FLOW CONTROL VALVE

To avoid damage to valve stem and seat, never over-tighten Sample Flow Control 'Valve.

The Sample Flowmeter is a standard feature in all panel mount instruments. For use with portable instruments, the Sample Flowmeter is incorporated into the optional Flowmeter Accessory.

The Sample Flow Control Valve adjusts the flow of sample gas through the electrolytic cell. The Sample Flowmeter indicates resultant nominal flow. Refer to Section 4-1c on page 4-4.

3-3 BYPASS FLOW CONTROL VALVE AND BY-

PASS FLOWMETER

The Bypass Flow Control Valve and Bypass Flowmeter are standard features of all panel mount instruments. For use with portable instruments, these two items are incorporated into the optional Flowmeter Accessory.

At all times when sample gas is flowing through the cell, electrical power should be on and Range Selector Switch should be at either a numbered position or the STDBY position. Unless an electrical current is drying the cell, a prolonged flow of wet sample gas could wash the desiccant coating from the cell electrodes.

The OFF position removes electrical power from all circuits. Normally, this switch position is used only during instrument servicing, and then but briefly.

3-2 SAMPLE FLOW CONTROL VALVE AND

SAMPLE FLOWMETER

The Sample Flow Control Valve is provided in all instruments.

Rosemount Analytical Inc. A Division of Emerson Process Management Operating Controls and Indicators 3-1

The valve adjusts the bypass flow. Resultant flow rate is indicated by the flowmeter. Bypass flow is adjustable from 0 to 2 cubic feet per hour (approximately 940 cc/min). Increasing the bypass flow decreases system response time.

3-4 CONTROLS OF ALARM SETPOINT ACCES-

SORY (PANEL MOUNT ANALYZERS ONLY)

The Alarm Setpoint Accessory is used, in combination with the Universal Alarm Board, to actuate various alarm and, or, control systems.

Initially, the Alarm Setpoint Switch is turned to position A, causing the meter to display the

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Model 340

Alarm Setpoint Accessory

alarm setpoint. Then, Setpoint Adjustment A is turned with a screwdriver to obtain the desired meter reading. Afterward, the Alarm Setpoint Switch is turned to OPERATE. During subsequent operation, if the water vapor concentration of the sample stream exceeds the selected level, the alarm circuit will actuate the external alarm system.

Meter

Setpoint Adjustment B (not used)

Setpoint Select Switch

Setpoint Adjustment A

NOTE

In Trace Moisture Analyzers, position B of the Alarm Setpoint Switch, and Setpoint Adjustment A, are inoperative.

Bypass Flow Meter*

Bypass Flow Control Valve*

Sample Flowmeter*

Sample Flow Control Valve

Range Selector Switch

*Visible through window, access by opening door.

Figure 3-1. Operating Controls of Model 340 Panel Mount Analyzer

3-2 Operating Controls and Indicators Rosemount Analytical Inc. A Division of Emerson Process Management

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Figure 3-2. Operating Controls of Explosion Proof Analyzer

Note: This instrument is no longer available – consult factory.

Figure 3-3. Operating Controls of the Portable Analyzer and Flowmeter Accessory

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3-4 Operating Controls and Indicators Rosemount Analytical Inc. A Division of Emerson Process Management

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SECTION 4

STARTUP

4-1 SYSTEMS UTILIZING PRESSURIZED GAS

SAMPLE

DANGER

POSSIBLE EXPLOSION HAZARD

This analyzer is of the type capable of analysis of sample gases which may be flammable. If used for analysis of such gases, the detection section of the analyzer must be either in an explosion proof enclosure suitable for the hazard classification of the gas, or, protected by a continuous dilution purge system in accordance with Standard ANSI/NFPA 496-1986 (Chapter 8) or IEC Publication 79-2-1983 (Section Three).

Internal leaks resulting from failure to observe these precautions could result in an explosion causing death, personal injury or property damage.

NOTE

If the instrument does not function properly during startup and calibration procedure, use the tests and adjustments described in Section 7-2 Service, on page 7-3.

This section is applicable to all analysis systems except those utilizing the Low Pressure Sampling Accessory. If this

accessory is used, refer to Section 4-2 on page 4-8.

Before attempting operation, complete the following procedures, in the sequence given.

1. Initial dry-down, Section 4-1a below.

2. System leak check, Section 4-1b on page 4-3.

3. Instrument calibration, by appropriate procedure of Section 4-1c on page 4-4.

a. Initial Dry-Down

CAUTION

ELECTROLYTIC CELL DAMAGE

To avoid damaging the electrolytic cell, read the following instructions before beginning the dry-down procedure.

1. Before supplying gas to sample inlet,

close Sample Flow Control Valve, but do not over-tighten. Turn Range Selector Switch to STDBY. Current will now flow through electrolytic cell, thus drying it.

2. Dry down the sample line and other

elements of the sample handling system as follows:

a. Supply purging gas to sample

inlet at a pressure of between 10 and 100 psig. Use of dry inert gas such as bottled nitrogen is recommended, particularly if sample contains corrosive or reactive components such as chlorine, hydrogen chloride, hydrogen sulfide, hydrogen, oxygen or unsaturated hydrocarbons. However, if sample stream consists of an non-reactive substance such as

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nitrogen, argon, helium, freon, methane, etc, use of bottled inert gas is unnecessary; the sample stream itself may be used as the purge gas.

b. Establish a considerable bypass

flow (2 cfh if sufficient gas is available). With panel mounted analyzer (or portable analyzer utilizing bypass feature of Flowmeter Accessory) bypass is initiated by opening the Bypass Flow Control Valve. Purge system for several hours.

3. Check dry-down of electrolytic cell by turning Range Selector Switch to 1000 ppm position; meter should read on-scale. As cell dries down, turn Range Selector Switch to successively lower numbered positions, always keeping the meter on-scale. Continue until meter reads on-scale on desired operating range.

4. Check dry-down of the sample handling system as follows:

a. Slightly open the Sample Flow

Control Valve to obtain a comparatively low flow; i.e., about 20 cc/min as indicated by Sample Flowmeter (or other flow measuring device used with portable analyzer).

b. Turn Range Selector Switch to

1000 ppm; meter should read on-scale.

When meter reads on-scale on 1000 ppm range, turn Range Selector Switch to successively lower numbered positions, always keeping the meter onscale. Continue until meter reads on-scale on desired operating range.

5. Prepare for sample monitoring as follows:

a. Return Range Selector Switch to

1000 ppm.

b. Pass sample gas through

instrument, if a different purge gas has been used during drydown.

c. Set Sample Flow Control Valve

for flow of approximately 1000 cc/min, as indicated by Sample Flowmeter (or other auxiliary flow measuring device used with portable analyzer). Exact flow required for accurate readout will be determined subsequently, as explained in Section 4-1c on page 4-4.

d. Turn Range Selector Switch to

successively lower numbered positions, always keeping meter on-scale, until meter reads onscale on desired operating range.

At levels below 10 ppm, a longer period of time is required to reach a constant reading. This is due to the need to establish an equilibrium between the low level of moisture being measured and the sample line components in contact with the sample. To demonstrate this, apply a heat gun to the incoming sample line and observe the moisture change. This procedure can also be used to accelerate the dry-down time of a "wet" sampling system.

When monitoring gas cylinders or in other non-continuous sampling, use of a nitrogen purged manifold to keep the amount of sample line exposed to ambient air as small as possible will help reduce dry-down time.

CAUTION

If meter goes off-scale on 1000 ppm range, sample handling system is insufficiently purged. To avoid damaging electrolytic cell, close Sample Flow Control Valve, continue the purging per Step 2.

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b. System Leak Check

An essential part of startup is elimination of even the smallest leaks from the sample handling system, both internal and external to analyzer. Note that water vapor will diffuse through a leak into a high pressure gas system even though the overall gas flow is outward from the system. Movement of moisture through the leak is determined by the difference in water vapor partial pressure across the leak, not the total pressure differential.

Small, hard to detect leaks are generally more troublesome than gross leaks; gas from a large leak tends to sweep away humid air from the vicinity and provide a surrounding blanket of sample gas. However, no leakage should be tolerated.

Leak detection and elimination can be time consuming and frustrating. To minimize expenditure of time, use either or both of the following leak check procedures.

Soap Solution or SNOOP Method

To test for leakage:

1. Connect sample handling system to sample source and to Trace Moisture Analyzer. Sampling system should utilize a packless block valve for connection to the source, and will probably incorporate a pressure regulator and/or a relief valve.

2. Adjust sample pressure to a value slightly below the setting of the pressure relief valve (if provided) or to about 50 psig (350 kPa) (if relief valve not provided).

4. Apply soap solution or SNOOP (PN

837801) to all fittings and connections.

5. Tighten any fittings where leakage is evident by bubbling or foaming.

Variable Bypass Method

The following alternative or supplemental leak test is applicable to all panel mounted analyzers, and also to portable analyzers that utilize the bypass feature of the Flowmeter Accessory. Usually, leakage from a given source into the sample system is relatively constant. Thus, leakage may be detected by varying the bypass flow rate while maintaining a constant sample flow rate through the electrolytic cell. For example, assume the sample stream has a given moisture level, and that a leak passes a small, constant flow of water vapor into the sample system.

With a high bypass flow, a large percentage of the water entering the system through the leak passes through the bypass flowmeter to vent, and does not go through the electrolytic cell. If the bypass flow rate is reduced, however, a greater amount of the water vapor that leaks into the system is carried through the cell. Consequently, indicated moisture level is higher with a low bypass flow rate than with a high bypass flow rate.

Thus, the criterion for absence of leakage in the system is that indicated moisture level must be independent of bypass flow rate. After each change of bypass flow rate, allow sufficient time for the sample system to equilibrate before reading the meter.

3. Close Sample and Bypass Flow Control Valves on Trace Moisture Analyzer.

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c. Instrument Calibration

Trace Moisture Analyzers are calibrated for direct readout in ppm H volume, based on a sample flow of 100 cc/min at 70°F (21°C) and 14.7 psia (760 mm Hg). If sample conditions are other than those stated, appropriate corrections must be made.

Nominal flowmeter setting required for air sample gas under the specified conditions is 100. Compensation for the particular sample gas and, or, barometric pressure is made by using an appropriately chosen flowmeter setting, which may offer considerably from the nominal value of 100. If great accuracy is not required, the flowmeter setting required may be computed as explained in Sections 4-1d below and 41e on page 4-6. For utmost accuracy, however, the flowmeter should be calibrated experimentally, as explained in Section 4-1f on page 4-6.

Temperature corrections, (applicable to portable analyzers only), are explained in Section 4-1f on page 4-6.

d. Computation of Sample Flowmeter

Settings

Typical sample flowmeter settings required for various gases at a pressure of 14.7 psia (760 mm Hg, normal value at sea level) are listed in Table 4-1 below.

O by

FLOWMETER

SAMPLE GAS

Air 100 Argon 127 Carbon Dioxide 86 Hydrogen 46 Helium 103 Nitrogen 97 Oxygen 115 Methane 61 Propane 52 Butane 49 Sulfur Hexafluoride 100 Natural Gas 60

Table 4-1. Typical Settings for

Sample Flowmeter

Values are flowmeter readings corresponding to 100 cc/min flows of the gases listed, with sample outlet vented to atmospheric pressure at sea level (14.7 psia). Values are applicable only to Brooks flowmeters, These values were determined experimentally, on a single flowmeter. For greatest accuracy, proper setting for the individual flowmeter should be determined experimentally, by the most appropriate method of Section 4-1f on page 4-6.

SETTING

(CC/MIN)

4-4 Startup Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

ABOVE SEA

LEVEL (FEET)

0 14.7 760 30.0 350 14.5 750 29.5 700 14.3 740 29.2

1050 14.1 730 28.9 1400 13.9 720 28.4 1750 13.7 710 28.0 2100 13.5 700 27.5 2450 13.3 690 27.2 2800 13.2 680 26.8 3200 13.0 670 26.4 3600 12.8 660 26.1 4000 12.6 650 25.7 4400 12.4 640 25.3 4800 12.2 630 24.9 5200 12.0 620 24.5 5600 11.8 610 24.1 6050 11.6 600 23.7 6500 11.4 590 23.3 6920 11.2 580 22.9 7410 11.0 570 22.5 7900 10.8 560 22.1

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NORMAL BAROMETRIC PRESSUREELEVATION

PSIA MM OF MERCURY INCHES OF MERCURY

Table 4-2. Normal Barometric Pressures for Various Elevations

For gases not listed in Table 4-1, the approximate flowmeter setting required under standard conditions may be

Viscosity values are determined from handbook data; units must be the same for both air and sample gas.

computed from the following equation:

sample

Where:

sample

air

= FS

air

sample

air

= Flowmeter setting for

sample gas

= Flowmeter setting for air

Example: Sample gas is hydrogen, viscosity 90 micropoise at 25°C; viscosity of air at this temperature is 182 micropoise.

= 100 x = 49.5

sample

182

(nominal value is 100)

sample

air

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= Viscosity of sample gas

= Viscosity of air

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e. Pressure (Elevation) Corrections To

Computed Flowmeter Values

The sample flowmeter is factory calibrated at sea level, with outlet end vented to atmospheric pressure (14.7 psia). At elevations appreciably above sea level, the flowmeter setting must be changed appropriately to compensate for reduced barometric pressure. The required sample flowmeter setting may be determined from the following equation:

= FS

Where:

cal

barometric pressure at instrument

= sample flowmeter setting required

for operation

= sample flowmeter setting during

cal

calibration as determined from Table 4-1 on page 4-4, computed from the equation of Section 4-1d on page 4-4.

14.7 psia

Model 340

f. Experimental Calibration of Sample

Flowmeter

For utmost accuracy, the sample flowmeter should be calibrated experimentally, at the installation site, with the particular sample gas. Such calibration compensates automatically for effects of sample gas and barometric pressure. Alternative methods are the following:

Liquid Displacement

This method is suitable for all sample streams except those containing water soluble gases, such as SO graduated cylinder filled with water is inverted into a beaker of water. Gas from the instrument outlet is brought by hose to the bottom of the cylinder. The time required to displace a given quantity of water from the cylinder is a measurement of the flow rate. (An error, negligible for most applications, is introduced by the pressure of the water column in the cylinder and by the small amount of sample gas that dissolves in the water.)

Soap Bubble Flow Measurement

or CO2. A

If actual barometric pressure at the installation site is not known, use Table 4-2 on page 4-5 to determine normal barometric pressure at the elevation involved.

The following example will clarify use of the equation.

Example: What flowmeter setting is required for carbon dioxide sample gas in an instrument at an elevation of 4000 feet?

Solution: From Table 4-1 on page 4-4, flowmeter setting required for CO

sea level is 86.

Therefore,

setting for 4000 feet = 86 x = 100.3

14.7

12.6

This method is suitable for all sample streams except those containing water soluble gases or hydrogen (which diffuses through the soap film). The method requires use of a 50 cc laboratory burette, preferably fitted with a 3-way stop cock.

The detergent or solution will move up the burette in a series of flat film disks, ultimately traveling about 1/2 to 1 inch apart. With a stopwatch, time one of these "plates" as it passes the initial 50 cc mark and ascends to the 0 cc graduation. Repeat the procedure until reproducibility is satisfactory. Back pressure is insignificant, and corrections for atmospheric pressure and temperature usually are not necessary.

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g. Temperature Corrections (Portable

Analyzers Only)

Operation of portable analyzers at temperatures above or below 70°F results in a readout error. Factors involved are the gas law influence and the effect on the flowmeter.

It is desired to correct for temperature effects, take all meter readings with sample flowmeter set at the correct value for operation at 80°F. Then, algebraically add the following correction to each meter reading.

Correction = 0.003 x (actual reading) x (actual temperature, °F - 70)

Example 1: Meter reads 50 ppm at 90°F

Required correction = 0.003 x 50 x (90-70) = + 3 ppm

Corrected reading = 50 + 3 = 53 ppm

Example 2: Meter reads 100 ppm at 50°F

Required correction = 0.003 x 100 x (50-70) = 6 ppm

Corrected reading = 100 - 6 = 94 ppm

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4-2 SYSTEMS UTILIZING THE LOW PRESSURE

SAMPLING ACCESSORY

NOTE

If the instrument does not function properly during startup and calibration procedure, use the tests and adjustments described in Section Nine, Service.

The Low Pressure Sampling Accessory permits use of a Model 340 Trace Moisture Analyzer to monitor gas sources at reduced pressures ranging from 10 inches of mercury vacuum to + 10 psig. Typical applications include measuring moisture concentrations in blanketing gases and in dry boxes.

The accessory is available in two versions: 630600 Accessory for 115 VAC, 60 Hz operation; and 630601 Accessory for 115 VAC, 50 Hz operation. They differ only in the electrical frequency requirement.

Normally, startup and operation of a low pressure trace moisture analysis system entail use of two different interconnection configurations, in turn.

1. Preparatory to initial operation, the system is temporarily connected as shown in A of Figure 4-1A below, to obtain an exact, experimental calibration of the Sample Flowmeter in the Trace Moisture Analyzer. In this configuration, the accessory supplies pressurized sample to the analyzer inlet.

2. For subsequent normal operation, the system is connected as shown Figure 4-1B below. In this configuration, the accessory applies a vacuum to the analyzer outlet, thus establishing a pressure differential which causes sample to enter the analyzer inlet.

To set up the analysis system for operation, perform the procedures described in the following Sections, in the sequence given.

Low

Pressure

Sample Source

Low

Pressure

Sample Source

Soap Bubble Flowmeter or other Flow Measuring Device

Sample Out

Packless Block

Valve

Packless Block

Valve

Vacuum

Gau

Vacuum

LOW PRESSURE ACCESSOR Y

MOISTURE

Sample In

ANALYZER

TRACE

Variable Restr ictor Valve (Closed)

Vacuum Pump

Sample Out

Pressure

Sample In

Vacuum

TRACE

MOISTURE

ANALYZER

Vacuum

Gau

LOW PRESSURE ACCESSOR Y

Figure 4-1. Interconnection of Low Pressure Analysis System

Variable Restr ictor Valve (Partially Open)

Vacuum Pump

Pressure

To Vent

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Instruction Manual

081854-R May 2002

a. Calibration Procedure for Sample

Flowmeter

To permit computation of the correct flowmeter setting required for low pressure operation, it is necessary first to determine the setting required for a flow of 100 cc/min of the particular gas, with flowmeter outlet vented to atmospheric pressure. The latter value is listed, for various pure gases, in Table 4-1 on page 4-4 . Generally, these data are accurate to better than ± 10 %. If greater accuracy is desired, or if the application involves a sample gas of unknown characteristics, the Sample Flowmeter should be calibrated experimentally, as explained in the following steps.

1. Connect Trace Moisture Analyzer, Low Pressure Accessory, and soap bubble flowmeter (or other accurate flow measuring device) in calibration configuration, Figure 4-1A on page 4-8. Analyzer Sample Flowmeter now discharges to atmospheric pressure.

2. On Trace Moisture Analyzer, turn Range Selector Switch to STDBY; fully close Sample Flow Control Valve; fully open Bypass Flow Control Valve (if provided).

NOTE

At all times when gas is flowing through the analyzer, electrical power should be on, and Range Selector Switch should be at either STDBY or a numbered position. This precaution protects the electrolytic cell from possible overloading with excessive I moisture.

b. Start vacuum pump.

c. Close Variable Restrictor Valve.

4. Adjust controls on Trace Moisture Analyzer as follows:

a. Adjust Sample Flow Control

Valve so Sample Flowmeter reads approximately 100.

b. Close Bypass Flow Control

Valve.

c. Readjust Sample Flow Control

Valve so Sample Flowmeter gain reads approximately 100.

d. Measure actual flow rate with

soap bubble flowmeter, or by gas or liquid displacement (Section 4-1f on page 4-6). On basis of the result obtained, readjust Sample Flow Control Valve to obtain actual flow of approximately 100 cc/min. Such trial and error adjustment can be continued until an exact flow of 100 cc/min is obtained; however, this approach can be time consuming. Therefore, a suggested alternative method is to measure the flow at several different settings on the Sample Flowmeter. Plot a curve of actual flow values versus Sample Flowmeter settings. Interpolation on this curve will indicate the Sample Flowmeter setting required for a sample flow of 100 cc/min.

5. Turn off vacuum pump.

CAUTION

3. Adjust controls on Low Pressure Accessory as follows:

a. Fully open Variable Restrictor

Valve.

Rosemount Analytical Inc. A Division of Emerson Process Management Startup 4-9

Do not run vacuum pump longer than is required to obtain flowmeter calibration. Prolonged operation under these conditions may damage pump.

PUMP DAMAGE

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081854-R May 2002

6. Connect Trace Moisture Analyzer and Low Pressure Accessory in normal operating configuration, Figure 4-1B on page 4-8. Hereafter, system will remain in this configuration unless recheck of flowmeter calibration is desired.

b. Operating Parameter Selection

Proper operation of the low pressure analysis system is dependent on selection of a compatible combination of readings on: (1) the Vacuum Gauge of the Low Pressure Accessory, and (2) the Sample Flowmeter of the Trace Moisture Analyzer. The following Sections explain selection of these parameters.

Vacuum Reading

Model 340

Sample Flowmeter Setting

Model 340 Trace Moisture Analyzers are factory calibrated for direct readout in ppm H20 by volume, based on a sample gas flow of 100 cc/min at a pressure of 30 inches of mercury (normal barometric pressure at sea level). Compensation for the particular operating pressure is made through use of an appropriately chosen setting for the Sample Flowmeter. Compute the proper operating setting from the following equation.

atm

-P

atm

Where:

= FS

atm

Within the Trace Moisture Analyzer, the Sample Flowmeter discharges directly to the sample outlet, (as shown in Figure 6-1 on page 6-2). Therefore, during the flow measurement procedure of Section 5.1, the Sample Flowmeter discharged to atmospheric pressure as shown in Figure 4-1A on page 4-8.

During subsequent operation, the Sample Flowmeter will discharge into a vacuum, indicated on the gauge of the Low Pressure Accessory, as shown in Figure 4-1A on page 4-8. The vacuum is adjustable via various valves in the system. Proper vacuum reading depends on sample supply pressure. Basic consideration is that the pressure differential must be sufficient to ensure adequate sample and bypass flows through the analyzer. Commonly, a vacuum of 10 inches Hg is used, at least for initial trial operation.

= Required reading on Sample

Flowmeter for normal operation (with reading of P gauge of Low Pressure Accessory).

= Reading obtained on Sample

atm

Flowmeter, during calibration, with actual sample flow of 100 cc/min discharged to atmospheric pressure.

= Absolute atmospheric pres-

atm

sure, in inches of mercury. For maximum accuracy, use the actual barometric pressure at the installation site. If this value is not known, use Table 4-2 to determine the normal barometric pressure at the particular elevation.

= Reading on vacuum gauge of

Low Pressure Accessory during normal operation.

on vacuum

4-10 Startup Rosemount Analytical Inc. A Division of Emerson Process Management

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Instruction Manual

081854-R May 2002

Example:

2. Adjust controls on Low Pressure Accessory as follows:

At a sea level installation, an instrument system is connected in the calibration configuration, Figure 4-1A on page 4-8. With the particular sample gas flowing, the soap bubble flowmeter indicates an actual flow of 100 cc/min discharged to atmospheric pressure, while the Sample Flowmeter in the analyzer reads 85.

a. Fully open Variable Restrictor

Valve.

b. Start vacuum pump.

c. Adjust Variable Restrictor Valve

for reading of 10 inches Hg (or other selected value) on Vacuum

Gauge. The system is now connected in the operating configuration, Figure 4-1B on page 4-8.

3. On Trace Moisture Analyzer, open Bypass Flow Control Valve until ball Bypass Flowmeter is within the

What is the required reading on the Sample Flowmeter?

upper third of the flowmeter tube, but not against the upper stop. Before proceeding further, allow

Solution:

instrument to dry down for at least one hour, and preferably for several

= 85

atm

= 30 in. Hg. (normal value

atm

at sea level)

hours.

4. On Trace Moisture Analyzer, open Sample Flow Control Valve until Sample Flowmeter indicates the

= 10 in. Hg.

value calculated from the equation given in Section 4-2b, paragraph

Substituting these values in the equation,

= 85 x = 128

(30 – 10)

“Sample Flowmeter Setting” on page 4-10.

5. Note reading on vacuum gauge of Low Pressure Accessory; if unchanged from Step 2c, proceed directly to Step 6.

c. Setup for Normal Operation

If reading has changed, re-compute

With Trace Moisture Analyzer and Low Pressure Accessory connected in normal operating configuration, Figure 4-1A on page 4-8, proceed as follows:

the sample flowmeter setting by substituting the present vacuum reading in the equation. Then, readjust the Sample Flow Control Valve to obtain the calculated

1. Set controls on Trace Moisture Analyzer as follows:

reading on the Sample Flowmeter. To obtain the particular flowmeter setting at the given vacuum

CONTROL POSITION

Range Selector Switch STDBY Sample Flow Control Valve Bypass Flow Control Valve

FULLY CLOSED

reading, it may be necessary to adjust valves in the following sequence:

•

Sample Flow Control Valve on analyzer

•

Bypass Flow Control Valve on analyzer

•

Variable Restrictor Valve on accessory

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Model 340

6. Turn Range Selector Switch to

lowest range which gives an onscale reading. Allow instrument to dry down for at least several hours, and preferably overnight.

7. Check reading on Sample

Flowmeter; if other than correct value, readjust Sample Flow Control Valve as required.

8. Turn Range Selector Switch to

lowest range which gives an onscale reading.

System is now in operation. For additional information on routine operation, refer to Section 5 Operation.

If the system utilizes a portable Trace Moisture Analyzer, and if the operating temperature differs appreciably from 70°F, temperature corrections may be desirable. Refer to Section 4-1g on page 4-7.

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SECTION 5

OPERATION

After completing system startup, use following operating procedure:

Turn on sample gas.

Verify that sample flowmeter reading is equivalent to 100 cc/min at 14.7 psia (760 mm Hg) and 70°F (21.1°C). Refer to Section 4-1c on page 4-4. (If Low Pressure Sampling Accessory is used, check readings on both its vacuum gauge and the sample flowmeter of the Trace Moisture Analyzer. Refer to Section 4-2b on page 4-10.)

Turn Range Selector Switch to appropriate position. Meter (and recorder, if used) will now automatically and continuously indicate the water vapor content of the sample stream, in parts-per-million by volume. To convert readings into weight-per-volume or weight-per-weight units, multiply by the appropriate factor from Table 5-1 on page 5-2. To convert readings into ice point temperatures, use the curve of Figure 5-1 on page 5-3.

5-1 RECOMMENDED CALIBRATION FRE-

QUENCY

At least once a week, note reading on sample flowmeter. If reading deviates from correct value, as previously determined, readjust Sample Flow Control Valve.

Less frequently, calibration of the sample flowmeter should be rechecked by one of the methods from Section 4-1f on page 4-6. Flowmeter characteristics may change gradually with internal deposition of dirt and other contaminants. Proper frequency for the calibration check depends on the particular sample stream, and is therefore best determined by experience.

5-2 SHUTDOWN

Normally, electrical power is never removed from the analyzer. Exceptions are (1) brief power turn off as required for routine maintenance; and (2) power turn off during prolonged shutdown of several weeks or more.

During periods of inactivity, Range Selector Switch should be left at STDBY. In standby mode, current flows through the electrolytic cell, thus keeping it dry and ready for immediate use upon resumption of operation.

If analyzer is to be used on a semi-continuous basis, e.g., during daylight working hours only, sampling system should incorporate shutoff valve(s) to prevent entry of moist air during inactive periods.

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Model 340

TO CONVERT B TO A

MULTIPLY BY:

(MW/1.8) x 10

1.25 x 10

PPM (v/v) Volume % 10

PPM (v/v) Weight % (1.8/MW) X 10

PPM (v/v) ml/Liter 10

PPM (v/v) mg/Liter 8.04 x 10

35.4 PPM (v/v) ml/Cu. Ft. 2.83 x 10

43.8 PPM (v/v) mg/Cu. Ft. 2.28 x 10

2.86 x 10

(MW/1.8) x 10

(MW/8.2) x 10

PPM (v/v) Grain/Cu. Ft. 3.5 x 10

PPM (v/v) mg/Gram (1.8/MW) x 10

PPM (v/v) Gram/Pound (8.2/MW) x 10

TO CONVERT A TO B

MULTIPLY BY:

-4

-3

-4

-2

-4

(MW/1.26) x 10 PPM (v/v) Grain/Pound (1.26/MW) x 10

(MW/1 .8) x 10

20 PPM (v/v) Pound/MMCF (CF x 106)5 x 10

PPM (v/v) Pound/Pound (1.8/MW) x 10

-2

Note: MW = molecular weight of the gas involved.

Table 5-1. Conversion Factors for Water Vapor Concentrations

-3

-2

-3

-1

-6

5-2 Operation Rosemount Analytical Inc. A Division of Emerson Process Management

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Figure 5-1. Ice Point vs. Parts-Per-Million H2O by Volume

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SECTION 6

THEORY

6-1 PRINCIPLE OF OPERATION

Trace moisture determination is based on the simultaneous absorption and electrolysis of water. The sensor is an electrolytic cell. Inside the molded plastic cell, the sample flows through a tube formed of two slightly separated rhodium wire helices. The outer surface of the tube is a substrate that firmly secures the wires in place. The inner surface is a thin film of desiccant, meta phosphoric acid, which absorbs water vapor from the sample.

A regulated DC voltage is applied between the helical electrodes, causing a current to flow through the film and thus electrolyze the absorbed water. The current is directly proportional to the water vapor content of the sample. The instrument is calibrated to provide direct readout of sample moisture in ppm by volume (for sample flow of 100 cc/min at 70°F and 14.7 psia). If desired, readings may be converted into various weight-per-volume and weight-per-weight units through use of the corresponding conversion factors listed in Table 5-1 on page 5-2.

6-2 FLOW SYSTEM

Internal flow system of the analyzer is shown in Figure 6-1 on page 6-2. To provide sample flow through the system, a suitable pressure differential must be established between sample inlet and outlet. In most applications, the inlet is connected to a pressurized sample source; the outlet discharges to atmospheric pressure. In applications utilizing the Low Pressure Sampling Accessory, the inlet is connected to a comparatively low-pressure sample source; and a vacuum is applied to the outlet.

conditions (70°F, 14.7 psia). The sample flowmeter is calibrated by its manufacturer for direct readout in cc/min under the following conditions: 1) sample gas, air; 2) temperature, 70°F, (21.1°C); 3) flowmeter outlet vented to atmospheric pressure at sea level (14.7 psia). For ultimate accuracy, however, the user should recalibrate the sample flowmeter for the particular sample gas, and for the actual discharge pressure if significantly less than

14.7 psia. In an analyzer used to monitor sample from a pressurized source, the flowmeter outlet is at the local barometric pressure. This may be considerably less than

14.7 psia if the installation site is at an appreciable elevation above sea level. Refer to Section 4-1c on page 4-4. With the Low Pressure Sampling Accessory, the flowmeter outlet discharges into a vacuum, necessitating the special calibration considerations explained in Section 4-2b on page 4-10.

To stabilize sample flow at the established level, the system incorporates a flow controller. The controller has two sides, separated by a diaphragm. One side connects to the upstream end, and the other side to the downstream end, of the Sample Flow Control Valve. Any pressure imbalance across the diaphragm causes an internal valve within the controller to open or close until equilibrium is achieved. At equilibrium, reached after initial flow through the system, a constant flow is maintained through the cell.

The Bypass Flow Control Valve and bypass flowmeter, if used, permit a portion of the sample to circumvent (bypass) the cell. Opening the bypass valve results in a high velocity flow through the sample lines, thus minimizing transport time lag.

The Sample Flow Control Valve is adjusted so that flow through the electrolytic cell is equivalent to 100 cc/min under standard

Rosemount Analytical Inc. A Division of Emerson Process Management Theory 6-1

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Model 340

Sample Out

Electrolytic

Cell

Sample Flowmeter

Sample Flow Control Valve

Flow

Controller

Sample In

Bypass Flowmeter

Bypass Flow Control Valve

Sample

Out

Electrolytic

Cell

Flow

Controller

Sample Flow

Control Valve

Sample Outlet

Sample Flowmeter

Bypass Flowmeter

Bypass Flow Control Valve

Sample In

Figure 6-1. Schematic Diagram of Internal Flow System

6-2 Theory Rosemount Analytical Inc. A Division of Emerson Process Management

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6-3 ELECTRONIC CIRCUITRY

The following Sections discuss electronic circuitry of the Trace Moisture Analyzer. For overall schematic and pictorial diagrams of the

INSTRUMENT SCHEMATIC DIAGRAM

Panel Mounted and Explosion Proof Analyzers DWG 194754

AC Operated Portable Analyzer DWG 194757

DC Operated Portable Analyzer DWG 194749

a. Electrolytic Call and Switch Assembly

(All Analyzers)

During operation, the electrolytic current flows through the cell and through one of five range resistors, depending on the setting of Range Selector Switch S1. The resultant signal developed across the particular range resistor is applied to the input of a DC operational amplifier circuit utilizing a high gain DC amplifier on the amplifier circuit board (Section 6-3b below). Switch S1 provides the capability of changing the sensitivity of the current measuring circuitry, to permit selection of different operating ranges.

Switch S1 and range resistors R3 through R7 are contained in the Switch Assembly. Also mounted on the switch assembly are resistors R1 and R2, which constitute a feedback divider for the amplifier circuit.

b. Amplifier Circuit Board (All Analyzers)

The amplifier circuit board, DWG 624265, contains the following circuits and components:

1. High Gain DC Amplifier. Utilized in the

amplifier circuit described in Section 63a above.

2. Potentiometric Output Selector. The

Potentiometric Output Selector consists of a multi-pin receptacle and two associated shorting plugs. The

particular instrument version, refer to the appropriate figures listed in the following table. Details of individual circuits are shown in separate schematic and pictorial diagrams, as referenced in the overall diagrams.

3. combination constitutes a switch, labeled S1 on the circuit board. Plug functions are the following:

a. Plug for CUR BD, YES/NO

Selector. If potentiometric output is desired, the plug is inserted between the pair of pins labeled NO. This connection routes the amplifier output signal through a voltage divider to circuit ground.

If current output is desired, the plug is inserted between the pair of pins labeled YES. This connection routes the amplifier output signal to the current output board, described in Section 6-3c on page 6-4.

b. Plug for Numbered Pairs of Pins.

To match instrument output of the desired potentiometric recorder, a shorting plug must be inserted between the corresponding pair of numerically labeled pins, thus selecting the appropriate tap on the voltage divider mentioned in item "a", proceeding. Choices are 10 mV, 100 mV, 1 V and 5 V. Circuit parameters are such that, with the plug in the position appropriate to the particular recorder, a signal voltage level of + 5 V at the amplifier output results in a fullscale recorder deflection.

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c. Current Output Board (Optional for AC

Analyzers Only)

The current output circuit board, DWG 624263, contains the following circuits and components.

1. Emitter follower stage. Darlington connected transistors Q23 and Q24 are used to convert the signal from the amplifier board into an output suitable for driving a current recorder.

To protect Q23 and Q24 from accidental overload, a current limiting circuit is provided. An increase in output current causes a corresponding increase in voltage across resistor R1 33, and therefore in the emitter to base voltage for transistor Q27. If output current momentarily becomes excessive, conduction through Q27 increases sufficiently to render Q23 and Q24 non-conducting, thereby decreasing output current.

2. Diode rectifiers CR10, CR11, and filter capacitor C30. These elements, together with one center-tapped secondary of transformer T2 of the ±15 Volt Power Supply (Section 6-3d on page 6-5), constitute a floating power supply for the emitter follower stage.

3. Offset current generator, providing

the capability of an output compatible with a live zero, current type recorder. Distinguishing

characteristics of the live zero systems is that when input to the amplifier is zero, the signal applied to the recorder is not zero. Instead, it is equal to 20% of the recorder input current required for a fullscale deflection. Thus, zero signal current is 1 mA for a 1 to 5 mA recorder, 4 mA for a 4 to 20 mA recorder, and 10 mA for a 10 to 50 mA recorder.

The offset current generator provides a choice of three constant currents. An

exact -10 volts is applied to the base of Q20A by a network consisting of reference diode CR12 and associated resistors (R83, R84, R85, and R86), connected between ground and the -15 volt supply. The collector voltage of Q20B drives the base of Q21; the emitter of Q21 drives the base of Q22 to maintain the required voltage at the base of Q20B. Section S913 of Recorder Milliampere Selector S9 selects the appropriate constant current by connecting the corresponding resistor: R86 for 1 mA, or R88 for 10 mA. (The output selection function of S9 is performed by Section 6-3c, item

5. below.)

4. Live Zero/Dead Zero Selector. This combination of a multi-pin receptacle and an associated reversible plug constitutes a switch, labeled S10 on the current output circuit. Alternative choices are the following:

a. A DEAD ZERO switch position

(used only with a 0 to 5 mA recorder) connects the recorder between the emitter follower output and the load resistance.

b. A LIVE ZERO switch position (used

with 1 to 5, 4 to 20 and 10 or 50 mA recorders) connects the recorder between ground and the negative terminal of the emitter follower power supply.

5. Recorder Milliamp Selector. This combination of a multi-pin receptacle and an associated 4-position plug constitutes a switch, labeled S9 on the circuit board. The plug provides a choice of four outputs, to permit use of a current recorder with a fullscale span of 0 to 5, 1 to 5, 4 to 20 or 10 to 50 mA. Circuit parameters are such that, with the plug in the position appropriate to the particular recorder, a signal voltage level of +5 volts at test point TP11 of the current output board results in a fullscale recorder deflection.

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d. ±15 Volt Power Supply (AC Analyzers

Only)

The ±15 Volt Power Supply provides power for the electronic circuitry of AC operated analyzers. (Power for the portable DC analyzer is normally provided by a ±15 volt battery pack.)

As shown in DWG 619710, power transformer T1 has three secondaries, used as follows:

1. A 38 VAC center tapped secondary powers both 15 volt supplies through diode bridge CR1 and filter capacitors C1 and C4.

The adjustable positive regulator, VR1, is set by voltage divider R1, R2 and R3, and its output is applied to pin A of the PCB and to test point TP1. R2 is adjustable and should be set to 15 ±0.75 VDC.

The negative DC, regulated by VR2, is applied to pin D of the PCB.

The center tap is the Common reference for both + 15 and - 15 volt supplies and is applied to pin B of the PCB and to test point TP2.

Both outputs are used by amplifier board. In addition the -15 volt output is used by the offset current generator in the optional Current Output Board (Section 6-3c on page 6-4).

2. The 90 volt secondary drives a rectifier circuit consisting of diodes CR10 and CR11, and filter capacitor C30. These components are on the optional Current Output Board. This transformer winding and its associated circuit components constitute a floating power supply for the emitter follower stage. Refer to Section 6-3c on page 6-4.

3. The 9.5 VAC secondary drives a + 5 volt supply not used in this instrument.

e. Alarm Setpoint Accessory and

Universal Alarm Board (Optional, for Panel Mount Analyzers Only)

The Alarm Setpoint Accessory, DWG 194760, and the Universal Alarm Board are used in combination to provide the basis for various alarm and/or control systems. Such systems are completed by the addition of appropriate, external, customer supplied components, depending on the requirements of the application and the preferences of the user.

For versatility in use with diverse instruments, the Alarm Setpoint Accessory incorporates two independent, adjustable, setpoint circuits, designated "A" and "B". If both circuits are used, each drives a separate Universal Alarm Board. However, the Trace Moisture Analyzer uses only circuit "A" and a single Universal Alarm Board to provide the high level alarm function.

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SECTION 7

MAINTENANCE AND SERVICE

7-1 MAINTENANCE

Most maintenance of the Trace Moisture Analyzer involves the electrolytic cell. This section describes recommended maintenance procedures. For location of cell and associated holder in the particular instrument configuration, refer to Figure 2-1 on page 2-2, or Figure 2-2 on page 2-3.

a. Care of the Electrolytic Cell

To minimize absorption of moisture, the cell should be kept sealed. Never leave it open to air longer than absolutely necessary. Adherence to this practice will increase cell life, and will cause response time to be dependent primarily n the dryness of the gas handling system external to the instrument.

b. Replacing Electrolytic Cell

To replace the electrolytic cell:

down procedure of Section 4-1a on page 4-1.

6. Make leak check of Section 4-1b on page 4-3. Analyzer is now ready for normal operation.

c. Cleaning and Re-sensitizing Electrolytic

Cell, Using PN 642257 Kit

The following instructions are shipped with the kit. The kit contains enough material for three recharges.

WARNING

HAZARDOUS CHEMICAL

Phosphoric acid (H3P04) is irritating to the skin, mucous membranes, eyes and respiratory tract. Direct contact causes burns. Avoid contact with eyes and skin and avoid breathing fumes. Use in hood or well ventilated place. Wear goggles, rubber gloves and protective clothing.

1. Remove electrical power from analyzer.

2. Unscrew cell holder and remove cell. If cell is to be re-sensitized, use procedure of Section 7-1c below.

3. Remove and discard old 0-rings; replace with new ones.

NOTE

New 0-rings should be installed whenever cell is replaced. New 0-rings are supplied with each replacement cell. O-rings are also obtainable separately under Part 834499 (two required).

4. Set replacement or re-sensitized cell in position. Tighten cell holder.

5. If, inadvertently, cell has been subjected to prolonged exposure to high moisture levels, repeat initial dry-

Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 7-1

In event of contact flush with water and obtain medical assistance.

1. Remove cell from instrument.

2. Flush cell with distilled water until effluent no longer gives acidic indication on litmus paper or pH meter.

3. Flush with 10 CC of distilled water. Blow cell interior dry with dry nitrogen.

4. Aspirate full concentration (85%) Reagent Grade phosphoric acid (H inner bore completely with acid.

5. Push a 6 inch (152 mm) length of teflon coated fiberglass string, supplied, through bore of cell so at least 1/2 inch (13 mm) projects from each port of cell. String will remain in place until completion of Step 8.

), supplied, through cell to fill

3PO4

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6. With a tissue, wipe off any excess acid displaced from cell. Resistance from either cell terminal to the metal shell of the hygrometer cell should be greater than 10 megohms. If not, clean cell exterior with a cotton swab wetted with distilled water.

7. Set flow controller on instrument for zero flow, then replace cell in instrument.

8. Supply nitrogen to instrument and set flow controller for 10 cc/min. Apply power to instrument and allow to dry down for 24 to 48 hours.

9. Remove cell from instrument; remove string from cell; replace cell in instrument.

10. With cell now recharged, instrument may be restored to operation. If recorder trace is noisy, i.e., noise level greater than 3% of fullscale;

a. Remove cell from instrument.

b. Run a 6 inch (152 mm) length of

the Teflon coated fiberglass string back and forth within the cell bore, as with use of dental floss.

c. Again restore instrument to service

and check noise level. It may be necessary to repeat this step.

11. Do not re-use the string as excess acid may be introduced into the cell.

7-2 Maintenance and Service Rosemount Analytical Inc. A Division of Emerson Process Management

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7-2 SERVICE

WARNING

ELECTRICAL SHOCK HAZARD

Servicing this instrument requires access to shock hazard level voltages which can cause death or serious injury. Refer servicing to qualified personnel.

Alarm switching relay contacts wired to a separate power source must be disconnected before servicing.

The most common symptoms of a malfunctioning analyzer are subnormal or zero meter reading, Section 7-2a below; off-scale meter reading, Section 7-2b below; and erratic meter reading, Section 7-2c below.

a. Subnormal or Zero Meter Reading

The most probable causes of subnormal or zero meter reading are the following:

1. Lack of power supply output voltage. To check, measure voltage. Zero voltage may be due to the following:

a. Instrument is not plugged in, or is

not turned on.

b. Fuse is burned out.

2. Cell element has become coated with inert material, has been "poisoned" by sample gases, or has lost its desiccant film. Refer to Section 7-1c on page 7-1 for instructions in cell cleaning and resensitizing.

b. Off-Scale Meter Reading

Possible causes of an off-scale meter reading are the following:

1. Electrolytic cell is partially shortcircuited. Remove cell. With an ohmmeter, measure resistance between cell terminals. Resistance should be 5,000 to 20,000 ohms or more; if less than this, clean and resensitize cell (per Section 7-1c on page 7-1) or replace it.

2. Moisture content of sample stream or sample handling system exceeds 1000 ppm. Run dry nitrogen, cylinder gas, or other suitable dry gas through sampling system and analyzer to determine if instrument dries down properly. Meter should read on-scale within 20 to 30 minutes.

c. Erratic Meter Reading

Erratic readings may be caused by any of the following factors,

1. Flow control is poor. Test as follows:

a. Perform leak check as explained in

Section 4-1b on page 4-3.

b. At instrument inlet, connect a

suitable dry gas with a pressure regulator. Pressure should be variable from 10 to 100 psig.

c. Bring pressure to 10 psig. Vary the

Sample Flow Control Valve setting. Flow rate should be adjustable above and below 100 cc/minute.

d. Bring pressure to 100 psig. Vary

Sample Flow Control Valve setting. Flow rate should be adjustable above and below 10 cc/minute.

e. Again bring pressure to 10 psig. Set

flow rate to 100 cc/minute. Vary inlet pressure from 10 to 100 psig. Flow rate should not vary more than ±10 cc/minute.

f. If flow control is unsatisfactory, clean

flow controller.

2. Electrolytic cell is partially plugged. Remove and inspect cell; if plugged, clean it as directed in Section 7-1c on page 7-1.

3. Cell is partially short-circuited. Remove cell. With an ohmmeter, measure resistance between cell terminals. Resistance should be 5,000 to 20,000 ohms or more; if less than this, clean and re-sensitize cell or replace it.

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7-4 Maintenance and Service Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

Instruction Manual

081854-R May 2002

SECTION 8

REPLACEMENT PARTS

The following parts are recommended for routine maintenance and troubleshooting of the Model 340 Trace Moisture Analyzer. If the troubleshooting procedures do not resolve the problem, contact your local Rosemount Analytical service office.

8-1 MATRIX

340TMA MODEL 340 TRACE MOISTURE ANALYZER

Code Ranges

01 0-10, 0-50, 0-100, 0-500, 0-1000 ppm 99 Special

Code Output

01 Voltage: 0-10 mV, 0-100 mV, 0-1V, 0-5 VDC 02 Current: 0-5, 1-5, 4-20 or 10-50 mA 99 Special

Code Alarm Relays

00 None 01 Single 99 Special

WARNING

PARTS INTEGRITY

Tampering or unauthorized substitution of components may adversely affect safety of this product. Use only factory documented components for repair.

Code Case

01 General Purpose, NEMA-3R 02 General Purpose, with Tropicalization 99 Special

Code Operation

01 117V, 50/60 Hz 02 230V 50/60 Hz 99 Special

340TMA 01 01 01 01 01 Example

Rosemount Analytical Inc. A Division of Emerson Process Management Replacement Parts 8-1

Instruction Manual

081854-R May 2002

Model 340

8-2 CIRCUIT BOARD REPLACEMENT POLICY

In most situations of circuit board malfunction, it is more practical to replace the board than to attempt isolation and replacement of the individual component. The cost of test and replacement will exceed the cost of a rebuilt assembly from the factory. As standard policy, rebuilt boards are available on an exchange basis. The price, with return of a repairable board, is less expensive than that of a new assembly. Each rebuilt assembly carries a one-year warranty.

Because of the exchange policy covering circuit boards, the following list does not include individual electronic components. If circumstances necessitate replacement of an individual component which can be identified by inspection or from the schematic diagrams, obtain the replacement component from a local source of supply.

8-3 SELECTED REPLACEMENT PARTS

Flow Regulator Diaphragm

Order the replacement flow regulator diaphragm directly from Brooks. The part number for the Viton diaphragm (used in brass regulators) is Brooks part number 8206h18084. For the Teflon diaphragm (used in the stainless steel regulators), request the equivalent part number.

Heater - 45 Watt

The built-in thermoswitch (set for 140°F ±5°) mounted on the bottom of the regulator (PN

193123) is attached with RTV silastic rubber.

Needle Valves – Sample Flow

The part number for brass is 876807, for stainless steel is 876806.

O-Rings – Analyzer Cell

The part number is 834499.

Batteries – DC Operation

The mercury battery part number is 652347 (package of two). The 7.5 VDC batteries used in older analyzers are no longer available. A conversion to mercury batteries kit (PN

652329) is available.

Cell - Analyzer

The part number for the cell is 193190.

8-2 Replacement Parts Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

a. Door Assembly – Panel Mount Instruments

Refer to Figure 8-1 below.

Instruction Manual

081854-R May 2002

Item

1 193152 Door, Instrument 1

2 194781 Meter 1

3 190889 Door Lock 1

4 816808 Knob 1

5 816816 Knob, Skirted 1

6 194746 Nameplate 1

7 193169 Window 1

8 823481 Connector – 15 Pin (J1, J2, J4) 3

9 000596 Clamp, Cable 2

10 194756 Harness, Wiring 1

11 193154 Door, Chassis 1

12 193170 Bracket, Support 1

13 193155 Switch, Attenuator 1

Part Number Description Qty

Figure 8-1. 194782 Door Assembly – Panel Mount Instrument

Rosemount Analytical Inc. A Division of Emerson Process Management Replacement Parts 8-3

Instruction Manual

081854-R May 2002

b. Chassis Assembly

Refer to Figure 8-2 on page 8-5.

Model 340

Item

1 193175 Collar, Flowmeter 1111

2 194779 Holder, Lamp 2222

6 193123 Heater (R1) 1111

7 193159 Shield, Lamp 1111

8 860001 Lamp, Incandescent (DS1) 1111

11 194723 Chassis 1111

13 193189 Manifold Assembly 1111

14 193195 Pin, Contact 2222

15 193158 Bracket, Manifold 1111

17 194766 Diode Assembly 1111

18 001867 Terminal Block (TB1, TB2) 1221

Part Number Description

810156 Fitting, Tee 2200

016487 Fitting, Tee 0022

866025 Flowmeter SS 1100

866024 Flowmeter 0011

630184 Tubing, SS – Sample In 1100

630185 Tubing – Sample In 0011

194735 Flowmeter Assembly SS 1100

194736 Flowmeter Assembly 0011

193183 Tubing 1100

193184 Tubing 0011

866026 Fitting, Elbow 1100

812890 Fitting, Elbow 0011

630181 Tubing – Sample Out 1100

630182 Tubing – Sample Out 0011

805947 Fuseholder 0110

008395 Fuse 1 Amp (F1) 0110

829587 Fitting, Combination 1100

817743 Fitting, Combination 0011

194776 194777 194778 194784

Qty

8-4 Replacement Parts Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

Instruction Manual

081854-R May 2002

Figure 8-2. Chassis Assembly

Rosemount Analytical Inc. A Division of Emerson Process Management Replacement Parts 8-5

Instruction Manual

081854-R May 2002

c. 193005 Portable AC Trace Moisture Analyzer

Refer to Figure 8-3 on page 8-7.

Item Part Number Description Qty

1 193129 Cover 1

2 193150 Nameplate 1

3 816816 Knob, Skirted 1

4 194753 Meter (M1) 1

5 095845 Gasket, Meter 1

6 823690 Knob 1

7 193179 Bezel 1

8 816951 Bumper 2

9 194748 Regulator, Flow 1

10 812890 Fitting, Elbow 1

11 193146 Manifold Assembly 1

12 193138 Harness, Wiring 1

13 823481 Connector (J1, J2, J3) 3

14 866016 Spacer, Threaded 4

15 809892 Screw, Pan Head

16 808264 Washer, Split-Lock No. 4

17 811756 Washer, Flat No. 4

18 079350 Clamp, Cable

19 079347 Washer, Cable Clamp

20 809916 Screw, Pan Head 6-32 x 1 / 4

21 809889 Screw, Pan Head 4-40 x 3/8

22 193114 Panel, Front 1

23 193155 Switch, Attenuator 1

24 630190 Tubing, Outlet 1

25 866021 Fitting, Combination 1

26 193195 Pin, Contact

27 193141 Panel 1

Model 340

8-6 Replacement Parts Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

Instruction Manual

081854-R May 2002

Figure 8-3. 193005 Portable AC Trace Moisture Analyzer

Rosemount Analytical Inc. A Division of Emerson Process Management Replacement Parts 8-7

Instruction Manual

081854-R May 2002

d. 194772 Flowmeter Accessory

Refer to Figure 8-4 below.

Item Part Number Description Qty

1 810062 Flowmeter 1

2 023381 Flowmeter 1

3 025033 Window 1

4 023377 Knob 1

5 193173 Bracket 1

6 016488 Fitting, Elbow 1

7 630192 Tube, Outlet 1

8 630193 Tube, Inlet 1

9 810156 Fitting, Tee 1

Model 340

Figure 8-4. 194772 Flowmeter Accessory

8-8 Replacement Parts Rosemount Analytical Inc. A Division of Emerson Process Management

Model 340

Instruction Manual

081854-R May 2002

SECTION 9

RETURN OF MATERIAL

9-1 RETURN OF MATERIAL

If factory repair of defective equipment is required, proceed as follows:

1. Secure a return authorization from a Rosemount Analytical Inc. Sales Office or Representative before returning the equipment. Equipment must be returned with complete identification in accordance with Rosemount instructions or it will not be accepted.

Rosemount CSC will provide the shipping address for your instrument.

In no event will Rosemount be responsible for equipment returned without proper authorization and identification.

2. Carefully pack the defective unit in a sturdy box with sufficient shock absorbing material to ensure no additional damage occurs during shipping.

3. In a cover letter, describe completely:

• The symptoms that determined the

equipment is faulty.

• The environment in which the

equipment was operating (housing, weather, vibration, dust, etc.).

• Site from where the equipment was

removed.

• Whether warranty or non-warranty

service is expected.

• Complete shipping instructions for the

return of the equipment.

4. Enclose a cover letter and purchase order and ship the defective equipment according to instructions provided in the Rosemount Return Authorization, prepaid, to the address provided by Rosemount CSC.

Rosemount Analytical Inc.

Process Analytical Division

Customer Service Center

1-800-433-6076

If warranty service is expected, the defective unit will be carefully inspected and tested at the factory. If the failure was due to the conditions listed in the standard Rosemount warranty, the defective unit will be repaired or replaced at Rosemount’s option, and an operating unit will be returned to the customer in accordance with the shipping instructions furnished in the cover letter.

For equipment no longer under warranty, the equipment will be repaired at the factory and returned as directed by the purchase order and shipping instructions.

9-2 CUSTOMER SERVICE

For order administration, replacement Parts, application assistance, on-site or factory repair, service or maintenance contract information, contact:

Rosemount Analytical Inc.

Process Analytical Division

Customer Service Center

1-800-433-6076

9-3 TRAINING

A comprehensive Factory Training Program of operator and service classes is available. For a copy of the Current Operator and Service Training Schedule contact the Technical Services Department at:

Rosemount Analytical Inc.

Customer Service Center

1-800-433-6076

Rosemount Analytical Inc. A Division of Emerson Process Management Return of Material 9-1

Instruction Manual

081854-R May 2002

Model 340

9-2 Return of Material Rosemount Analytical Inc. A Division of Emerson Process Management

WARRANTY

Goods and part(s) (excluding consumables) manufactured by Seller are warranted to be free from defects in workmanship and material under normal use and service for a period of twelve (12) months from the date of shipment by Seller. Consumables, glass electrodes, membranes, liquid junctions, electrolyte, o-rings, etc., are warranted to be free from defects in workmanship and material under normal use and service for a period of ninety (90) days from date of shipment by Seller. Goods, part(s) and consumables proven by Seller to be defective in workmanship and/or material shall be replaced or repaired, free of charge, F.O.B. Seller's factory provided that the goods, part(s) or consumables are returned to Seller's designated factory, transportation charges prepaid, within the twelve (12) month period of warranty in the case of goods and part(s), and in the case of consumables, within the ninety (90) day period of warranty. This warranty shall be in effect for replacement or repaired goods, part(s) and the remaining portion of the ninety (90) day warranty in the case of consumables. A defect in goods, part(s) and consumables of the commercial unit shall not operate to condemn such commercial unit when such goods, part(s) and consumables are capable of being renewed, repaired or replaced.

The Seller shall not be liable to the Buyer, or to any other person, for the loss or damage directly or indirectly, arising from the use of the equipment or goods, from breach of any warranty, or from any other cause. All other warranties, expressed or implied are hereby excluded.

IN CONSIDERATION OF THE HEREIN STATED PURCHASE PRICE OF THE GOODS, SELLER GRANTS ONLY THE ABOVE STATED EXPRESS WARRANTY. NO OTHER WARRANTIES ARE GRANTED INCLUDING, BUT NOT LIMITED TO, EXPRESS AND IMPLIED WARRANTIES OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Limitations of Remedy. SELLER SHALL NOT BE LIABLE FOR DAMAGES CAUSED BY DELAY IN PERFORMANCE. THE SOLE AND EXCLUSIVE REMEDY FOR BREACH OF WARRANTY SHALL BE LIMITED TO REPAIR OR REPLACEMENT UNDER THE STANDARD WARRANTY CLAUSE. IN NO CASE, REGARDLESS OF THE FORM OF THE CAUSE OF ACTION, SHALL SELLER'S LIABILITY EXCEED THE PRICE TO BUYER OF THE SPECIFIC GOODS MANUFACTURED BY SELLER GIVING RISE TO THE CAUSE OF ACTION. BUYER AGREES THAT IN NO EVENT SHALL SELLER'S LIABILITY EXTEND TO INCLUDE INCIDENTAL OR CONSEQUENTIAL DAMAGES. CONSEQUENTIAL DAMAGES SHALL INCLUDE, BUT ARE NOT LIMITED TO, LOSS OF ANTICIPATED PROFITS, LOSS OF USE, LOSS OF REVENUE, COST OF CAPITAL AND DAMAGE OR LOSS OF OTHER PROPERTY OR EQUIPMENT. IN NO EVENT SHALL SELLER BE OBLIGATED TO INDEMNIFY BUYER IN ANY MANNER NOR SHALL SELLER BE LIABLE FOR PROPERTY DAMAGE AND/OR THIRD PARTY CLAIMS COVERED BY UMBRELLA INSURANCE AND/OR INDEMNITY COVERAGE PROVIDED TO BUYER, ITS ASSIGNS, AND EACH SUCCESSOR INTEREST TO THE GOODS PROVIDED HEREUNDER.

Force Majeure. Seller shall not be liable for failure to perform due to labor strikes or acts beyond Seller's direct control.

Instruction Manual

081854-R May 2002

Model 340

Emerson Process Management

Rosemount Analytical Inc. Process Analytic Division

1201 N. Main St. Orrville, OH 44667-0901 T (330) 682-9010 F (330) 684-4434 E gas.csc@emersonprocess.com

ASIA - PACIFIC Fisher-Rosemount Singapore Private Ltd.

1 Pandan Crescent Singapore 128461 Republic of Singapore T 65-777-8211 F 65-777-0947

http://www.processanalytic.com

Fisher-Rosemount GmbH & Co.

Industriestrasse 1 63594 Hasselroth Germany T 49-6055-884 0 F 49-6055-884209

EUROPE, MIDDLE EAST, AFRICA Fisher-Rosemount Ltd.

Heath Place Bognor Regis West Sussex PO22 9SH England T 44-1243-863121 F 44-1243-845354

LATIN AMERICA Fisher - Rosemount

Av. das Americas 3333 sala 1004 Rio de Janeiro, RJ Brazil 22631-003 T 55-21-2431-1882

Rosemount 340 Trace Moisture Analyzer-Rev R Manuals & Guides

Specifications and Main Features

Frequently Asked Questions

User Manual

ESSENTIAL INSTRUCTIONS

TABLE OF CONTENTS

LIST OF ILLUSTRATIONS

LIST OF TABLES

LIST OF DRAWINGS

PREFACE

DEFINITIONS

SAFETY SUMMARY

AUTHORIZED PERSONNEL

DOCUMENTATION

DESCRIPTION AND SPECIFICATIONS

1-1 OVERVIEW

1-2 INSTRUMENT CONFIGURATIONS

1-3 SAMPLE GASES

a. Suitable Sample Gases

b. Unsuitable Sample Gases

1-4 SPECIFICATIONS

a. Performance

c. Sample

INSTALLATION

2-1 FACILITY PREPARATION

a. Outline and Mounting Dimensions

c. Location

d. Utility Specifications

2-2 UNPACKING

2-3 ELECTRICAL CONNECTIONS

d. Setting the Deadband

f. Electrical Power Connection

Table 2-1. Accessory Devices for Sample Pressure Ranges

OPERATING CONTROLS AND INDICATORS

3-1 RANGE SELECTOR SWITCH AND METER

STARTUP

a. Initial Dry-Down

b. System Leak Check

c. Instrument Calibration

Table 4-2. Normal Barometric Pressures for Various Elevations

b. Operating Parameter Selection

Vacuum Reading

Sample Flowmeter Setting

c. Setup for Normal Operation

OPERATION

5-2 SHUTDOWN

Table 5-1. Conversion Factors for Water Vapor Concentrations

THEORY

6-1 PRINCIPLE OF OPERATION

6-2 FLOW SYSTEM

6-3 ELECTRONIC CIRCUITRY

MAINTENANCE AND SERVICE

7-1 MAINTENANCE

b. Replacing Electrolytic Cell

7-2 SERVICE

a. Subnormal or Zero Meter Reading

b. Off-Scale Meter Reading

c. Erratic Meter Reading

REPLACEMENT PARTS

8-1 MATRIX

8-2 CIRCUIT BOARD REPLACEMENT POLICY

8-3 SELECTED REPLACEMENT PARTS

b. Chassis Assembly

c. 193005 Portable AC Trace Moisture Analyzer

d. 194772 Flowmeter Accessory

RETURN OF MATERIAL

9-1 RETURN OF MATERIAL

9-2 CUSTOMER SERVICE

9-3 TRAINING

WARRANTY