Rosemount 7D Manuale utente

Rosemount Analytical

MODEL 7D

THERMAL CONDUCTIVITY

ANALYZER

EXPLOSION PROOF

INSTRUCTION MANUAL

748221-L

NOTICE

The information contained in this document is subject to change without notice.

This manual is based on the production version of the Model 7D Thermal Conductivity Analyzer. Hardware

and/or software changes may have occurred since this printing.

Manual Part Number 748221-L

December 2000

Printed in U.S.A.

Rosemount Analytical Inc.

4125 East La Palma Avenue

Anaheim, California 92807-1802

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

SNOOP® is a registered trademark of NUPRO Co.

CONTENTS

748221-L Rosemount Analytical December 2000 i

Model 7D Thermal Conductivity Analyzer

PREFACE

PURPOSE/SAFETY SUMMARY........................................................................P5

SPECIFICATIONS..............................................................................................P3

CUSTOMER SERVICE, TECHNICAL ASSISTANCE AND FIELD SERVICE....P4

RETURNING PARTS TO THE FACTORY.........................................................P4

TRAINING ......................................................................................................P4

DOCUMENTATION............................................................................................P4

COMPLIANCES .................................................................................................P5

SECTION 1. INTRODUCTION

1.1 ANALYZER MODULE .................................................................................1

1.1.1 Thermal Conductivity Cell..............................................................1

1.1.2 Electronic Circuitry.........................................................................3

1.2 GAS SELECTOR PANEL............................................................................4

SECTION 2. INSTALLATION

2.1 FACILITY PREPARATION..........................................................................5

2.1.1 Installation Drawings......................................................................5

2.1.2 Customer Electrical Connections...................................................5

2.1.3 Flow Diagrams...............................................................................5

2.1.4 Location and Mounting...................................................................5

2.2 UNPACKING...............................................................................................7

2.2.1 Gas Requirements General...........................................................7

2.2.2 Calibration Gas Requirements.......................................................7

2.2.3 Leak Check....................................................................................8

2.2.4 Gas Connections ...........................................................................8

CONTENTS

ii December 2000 Rosemount Analytical 748221-LModel 7D Thermal Conductivity Analyzer

SECTION 2. (CONTINUED)

2.3 RECORDER OUTPUT SELECTION AND CABLE CONNECTIONS.......... 10

2.3.1 Standard (Non-linearized) Voltage Output .................................... 11

2.3.2 Linearized Voltage Output (Optional)............................................ 11

2.3.3 Isolated 4 to 20 mA Current Output (Optional).............................. 11

2.3.4 Dual Alarms (Optional).................................................................. 13

2.3.5 Linearized Voltage, Two Ranges (Optional).................................. 15

2.3.6 Linearized Voltage and Isolated 4 to 20 mA Current Output

(Optional)...................................................................... 16

2.4 ELECTRICAL POWER CONNECTIONS.................................................... 16

SECTION 3. INITIAL STARTUP

3.1 ANALYZER CONTROLS AND ADJUSTMENTS........................................ 19

3.2 GAS SELECTOR PANEL CONTROLS ...................................................... 19

3.3 STARTUP PROCEDURE ........................................................................... 19

3.4 CALIBRATION............................................................................................ 21

SECTION 4. OPERATION

4.1 ROUTINE OPERATION.............................................................................. 23

4.2 RECOMMENDED CALIBRATION FREQUENCY....................................... 23

4.3 SHUTDOWN............................................................................................... 23

SECTION 5. THEORY

5.1 THERMAL CONDUCTIVITY CELL AND ASSOCIATED BRIDGE

ADJUSTMENTS........................................................................... 25

5.2 ELECTRONIC CIRCUITRY ........................................................................ 26

5.2.1 Master Board................................................................................. 26

5.2.2 Voltage Output Linearizer Board (Optional) .................................. 28

5.2.3 Isolated 4 to 20 mA Current Output Board (Optional) ................... 28

5.2.4 Bridge Power Supply..................................................................... 29

5.2.5 ±15 Volt Power Supply.................................................................. 29

5.2.6 Detector Blocks............................................................................. 30

5.2.7 Case Temperature Controller Assembly....................................... 30

5.2.8 Dual Alarms (Option)...................................................................... 30

CONTENTS

748221-L Rosemount Analytical December 2000 iii

Model 7D Thermal Conductivity Analyzer

SECTION 6. SERVICE AND MAINTENANCE

6.1 THERMAL CONDUCTIVITY CELL..............................................................32

6.2 ELECTRONIC CIRCUITRY.........................................................................32

6.2.1 Amplifier Zero Adjustments............................................................32

6.2.2 Bridge Balance and Range Sensitivity Adjustments......................32

6.2.3 Bridge Voltage Adjustment ............................................................33

6.2.4 Case Temperature Controller ........................................................33

6.2.5 Dual Alarm Module (Optional)........................................................34

6.3 SUPPRESSED ZERO ADJUSTMENT........................................................34

SECTION 7. REPLACEMENT PARTS

7.1 CIRCUIT BOARD REPLACEMENT POLICY ..............................................37

7.2 REPLACEMENT PARTS.............................................................................37

7.2.1 Selected Replacement Parts .........................................................37

7.2.2 Temperature Control Assembly.....................................................38

7.2.3 Alarm Option..................................................................................38

7.2.4 Range Switch Kit............................................................................38

DATA SHEET

GENERAL PRECAUTIONS FOR HANDLING & STORING HIGH PRESSURE CYLINDERS

WARRANTY

FIELD SERVICE AND REPAIR FACILITIES

CONTENTS

iv December 2000 Rosemount Analytical 748221-LModel 7D Thermal Conductivity Analyzer

FIGURES

1-1. Model 7D Front Panel Controls.................................................................. 2

1-2. Model 7D Major Component Locations...................................................... 3

1-3. Typical Gas Selector Panel........................................................................ 4

2-1. Gas Selector Panel for Thermal Conductivity Cell with

Sealed-In Reference Gas............................................................. 6

2-2. Gas Selector Panel for Thermal Conductivity Cell Using

Flowing Reference Gas................................................................ 6

2-3. Connection of Analyzer Using Sealed-In Reference Gas to

Associated Gas ............................................................................ 8

2-4. Connection of Analyzer Using Flowing Reference Gas to

Associated Gas Selector Panel.................................................... 9

2-5. Electrical Connections ............................................................................... 10

2-6. Master Board ............................................................................................. 12

2-7. Alarm Adjustments..................................................................................... 13

2-8. Typical Alarm Settings............................................................................... 15

2-9. Case Heater Temperature Control Board.................................................. 17

5-1. Thermal Conductivity Cell.......................................................................... 27

7-1. Analyzer Assembly - Door and Pneumatic Components........................... 39

7-2. Analyzer Assembly - Electronic Components............................................ 40

7-3. Temperature Control Assembly................................................................. 41

TABLES

1-1. Available Gas Selector Panels................................................................... 4

2-1. Alarm Output Connections......................................................................... 14

5-1. Range Switch Connections........................................................................ 26

DRAWINGS (LOCATED IN REAR OF MANUAL)

613561 Schematic Diagram, Bridge Power Supply - Regulated 5 to 15V

619710 Schematic Diagram, 15V Power Supply

624003 Schematic Diagram, Temperature Controller

652813 Schematic Diagram, Isolated Current Output

652863 Schematic Diagram, Linearizer Board

654616 Schematic Diagram, Master Board

654625 Installation Drawing, Model 7D

654642 Wiring Diagram, Model 7D

PREFACE

748221-L Rosemount Analytical December 2000 P1

Model 7D Thermal Conductivity Analyzer

PURPOSE/SAFETY SUMMARY

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 Model 7D Thermal

Conductivity Analyzer should be thoroughly familiar with and strictly follow the instructions

in this manual. Save these instructions.

If this equipment is used in a manner not specified in these instructions, protective

systems may be impaired.

DANGER is used to indicate the presence of a hazard that will cause severe

personal injury, death, or substantial property damage if the warning is ignored.

WARNING is used to indicate the presence of a hazard which can cause severe

personal injury, death, or substantial property damage if the warning is ignored.

CAUTION is used to indicate the presence of a hazard which will or can cause minor

personal injury or property damage if the warning is ignored.

NOTE is used to indicate installation, operation or maintenance information which is

important but not hazard-related.

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.

Note:

Before supplying electrical power to the analyzer, remove power to the bridge

by disconnecting the red lead from the bridge to TB1-1 or TB1-2 (depending on

the bridge polarity). See drawing 654642. To safeguard against filament

damage, this lead should remain disconnected until proper gas flow has been

established.

WARNING: ELECTRICAL SHOCK HAZARD

PREFACE

P2 December 2000 Rosemount Analytical 748221-LModel 7D Thermal Conductivity Analyzer

Do not operate the Model 7D Explosion-Proof Analyzer without the lens cover

and door in place with all bolts secured, unless location have been determined

to be non-hazardous.

This analyzer is of a type capable of analysis of sample gases which may be

flammable. If used for analysis of such gases, the instruments explosion-proof

enclosure must be suitable for the gas.

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 the system is in leak-proof condition.

Leak-check instructions are provided in Section 2.2.3.

Internal leaks resulting from failure to observe these precautions could result in

an explosion causing death, personal injury or property damage.

Tampering or unauthorized substitution of components may adversely affect

safety of this product. Use only factory documented components for repair.

This analyzer requires periodic calibration with known zero and standard gases.

Refer to General Precautions for Handling and Storing High Pressure Cylinders,

at the rear of this manual.

WARNING: EXPLOSION HAZARD

WARNING: PARTS INTEGRITY

WARNING: HIGH PRESSURE GAS CYLINDERS

PREFACE

748221-L Rosemount Analytical December 2000 P3

Model 7D Thermal Conductivity Analyzer

SPECIFICATIONS

REPRODUCIBILITY

±0.5% of fullscale

ZERO DRIFT1

±1% of fullscale per 24 hours

SPAN DRIFT1

±1% of fullscale per 24 hours

NOISE Less than ±0.5% of fullscale

CELL RESPONSE TIME2

30 seconds for 95% response, with sample flow of 250 cc/min.

SAMPLE FLOW

Nominal, 50 to 350 cc/min; recommended, 250 cc/min.

CALIBRATION GAS FLOW

Nominal, 50 to 350 cc/min; recommended, 250 cc/min.

REFERENCE GAS FLOW (IF REQUIRED)

5 to 50 cc/min.

SUPPLY PRESSURE

10 to 50 psig (69 to 345 kPa)

METER Indicating analog meter is standard.

OPERATING RANGES

Various zero-based and zero-suppressed ranges, from 0% to 100%, are

available. Single range is standard; switch-selectable dual or triple range is

optional.

AMBIENT TEMPERATURE RANGE

32°F to 100°F (0°C to 38°C). Case Temperature controlled at 117°F (47°C).

OUTPUT VOLTAGE (STANDARD NON-LINEARIZED)

Switch selectable: 0 to 10 mV, 0 to 100 mV, 0 to 1V or 0 to 5V DC

OUTPUT VOLTAGE (OPTIONAL LINEARIZED)

Switch selectable: 0 to 10 mV, 0 to 100 mV, 0 to 1V or 0 to 5V DC

ISOLATED CURRENT OUTPUT (OPTIONAL)

4 to 20 mA, maximum load 1500 ohms

DUAL ALARMS (OPTIONAL)

Relay contact rating: 1.0 A, 120V AC; 5.0 A, 120V DC, resistive loads

CELL MATERIALS (STANDARD CELL)

316 stainless steel block with tungsten or Hitempco filaments. Corrosion-

resistant filaments available on order

POWER REQUIREMENTS

115/230 VAC ±10%, 50/60 Hz, 250 Watts

ENCLOSURE

Class I, Groups B, C and D, Division 1 hazardous locations (ANSI/NFPA 70)

1Zero and Span drift specifications based on ambient temperature shifts of less than 18 Fahrenheit degrees (10 Celsius

degrees) at a maximum rate of 18 Fahrenheit degrees (11 Celsius degrees) per hour.

2Cell response time is less than 45 seconds for 95% response, with sample flow rate of 250 cc/min, for the following gas

combinations: Argon and air, nitrogen, or oxygen; carbon dioxide and argon, nitrogen, or oxygen; helium and methane;

hydrogen and methane.

PREFACE

P4 December 2000 Rosemount Analytical 748221-LModel 7D Thermal Conductivity Analyzer

CUSTOMER SERVICE, TECHNICAL ASSISTANCE AND FIELD 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

RETURNING PARTS TO THE FACTORY

Before returning parts, contact the Customer Service Center and request a Returned

Materials Authorization (RMA) number. Please have the following information when

you call: Model Number, Serial Number, and Purchase Order Number or Sales Order

Number.

Prior authorization by the factory must be obtained before returned materials will be

accepted. Unauthorized returns will be returned to the sender, freight collect.

When returning any product or component that has been exposed to a toxic, corrosive

or other hazardous material or used in such a hazardous environment, the user must

attach an appropriate Material Safety Data Sheet (M.S.D.S.) or a written certification

that the material has been decontaminated, disinfected and/or detoxified.

Return to:

Rosemount Analytical Inc.

4125 East La Palma Avenue

Anaheim, California 92807-1802

USA

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.

Phone: 1-714-986-7600

FAX: 1-714-577-8006

DOCUMENTATION

The following Model 7D Thermal Conductivity Analyzer instruction materials are

available. Contact Customer Service or the local representative to order.

748221 Instruction Manual (this document)

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