Rosemount 7D User manual

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: 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: [phone]
FAX: [phone]
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)