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Summary of Contents for Rosemount 7D
- Page 1 Rosemount Analytical ODEL HERMAL ONDUCTIVITY NALYZER XPLOSION ROOF NSTRUCTION ANUAL 748221-L...
- Page 2 OTICE 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. Teflon® is a registered trademark of E.I. duPont de Nemours and Co., Inc.
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Page 3: Table Of Contents
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 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... - Page 4 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 Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L...
- Page 5 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 HEET & S ENERAL RECAUTIONS FOR ANDLING TORING RESSURE YLINDERS ARRANTY IELD ERVICE AND EPAIR ACILITIES 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer...
- Page 6 ONTENTS IGURES 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 ..............
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Page 7: Preface
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. - Page 8 REFACE WARNING: EXPLOSION HAZARD 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. WARNING: EXPLOSION HAZARD This analyzer is of a type capable of analysis of sample gases which may be flammable.
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Page 9: Specifications
Cell 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. 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... -
Page 10: Customer Service, Technical Assistance And Field Service
Technical Services Department at: Rosemount Analytical Inc. Phone: 1-714-986-7600 FAX: 1-714-577-8006 OCUMENTATION 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) Model 7D Thermal Conductivity Analyzer... -
Page 11: Compliances
REFACE OMPLIANCES The explosion-proof Model 7D Thermal Conductivity Analyzer is approved by Factory Mutual Research Corp. (FMRC) for installation in Class I, Groups B, C, and D, Division 1 hazardous locations as defined in the National Electrical Code (NEC), ANSI/NFPA-... - Page 12 REFACE OTES Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L...
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Page 13: Introduction
A Model 7D Analyzer consists of an analyzer module, Section 1.1, and, if ordered, an accessory gas selector panel, Section 1.2. 1.1 ANALYZER MODULE... - Page 14 Rosemount Analytical Thermal Conductivity Analyzer ZERO SPAN ALARM 1 ALARM 2 RANGE 100% 100% Model 7D Rosemount Analytical Thermal Conductivity Analyzer 1-1. M 7D F IGURE ODEL RONT ANEL ONTROLS Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L...
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Page 15: Electronic Circuitry
Bridge Power Supply Master Board REF - Hinge Side AC Power Input Terminal Block TB6 Fuse Temperature Control Assembly Cell Enclosure Alarm Kit 1-2. M 7D M IGURE ODEL AJOR OMPONENT OCATIONS 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... -
Page 16: Gas Selector Panel
Stainless steel construction for use with sealed reference 117195 Brass and Copper construction for use with flowing reference 118210 Stainless steel construction for use with flowing reference 1-1. A ABLE VAILABLE ELECTOR ANELS Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L... -
Page 17: Installation
32 F to 100 F (0 C to 38 OUNTING The analyzer is designed for surface mounting, utilizing the hardware provided. Refer to drawing 654625. 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... - Page 18 SAMPLE UPSCALE CALIBRATION GAS 3.25 [83] Mounting Holes (4) NO. 8 Flat Head Screw Ref Gas Upscale Calibration Gas 2-2. G IGURE ELECTOR ANEL FOR HERMAL ONDUCTIVITY SING LOWING EFERENCE Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L...
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Page 19: Unpacking
NSTALLATION 2.2 UNPACKING The Model 7D Thermal Conductivity Analyzer is a precision instrument and should be handled carefully. Carefully examine the shipping carton and contents for signs of damage. Immediately notify the carrier if the carton or its contents are damaged. -
Page 20: Leak Check
Thermal Conductivity Analyzer Needle Valves Reference Gas Sealed-In Sample In Flowmeter Thermal Conductivity Cell Zero Standard To Vent Span Standard 2-3. C IGURE ONNECTION OF NALYZER SING EALED EFERENCE AS TO SSOCIATED Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L... -
Page 21: Flowing Reference Gas
Sample Gas Sample Reference Flowmeter Flowmeter Thermal Conductivity Cell Downscale Calibration Sample Reference Vent Vent Upscale Calibration 2-4. C IGURE ONNECTION OF NALYZER SING LOWING EFERENCE AS TO SSOCIATED ELECTOR ANEL 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... -
Page 22: Recorder Output Selection And Cable Connections
654642) via a number 22 or number 24 AWG two-conductor shielded cable. Route the cable through conduit to the analyzer, and into the case through the appropriate opening shown in drawing 654625. Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical... -
Page 23: Standard (Non-Linearized) Voltage Output
SOLATED URRENT UTPUT PTIONAL 1. Verify that the Isolated 4 to 20 mA Current Output Board (PN 652816) is properly inserted in J103. 2. On the Master Board (Figure 2-6): 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... -
Page 24: Master Board
Permits adjusting meter fullscale to agree with recorder fullscale DETAIL OF S1 Used to eliminate voltage offset within AR2. Sets the stable ±10 V source. ADJUSTMENTS 2-6. M IGURE ASTER OARD Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L... -
Page 25: Dual Alarms (Optional)
(see Figure 2-5 and Table 2-1). The Form C relay contacts are rated at 5 A, 120 VDC and 1 A, 120 VAC, resistive loads. A lit LED next to the Deadband pots indicates the alarm is activated. 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... - Page 26 2) a contact closure or contact opening for a de-energized relay. For fail-safe applications, the operator must understand which circuit conditions are required to achieve relay de-energization in the event of power failure. Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical...
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Page 27: Linearized Voltage, Two Ranges (Optional)
When input signal moves upscale through this point, the coil of ALARM 2 relay (K2) is energized, providing continuity between the common and normally-closed contacts of the relay. 2-8. T IGURE YPICAL LARM ETTINGS 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... -
Page 28: Linearized Voltage And Isolated 4 To 20 Ma Current Output
TB1-1 or TB1-2 (depending on bridge polarity). This action disconnects power to the bridge (see drawing 654642). To safeguard against filament damage, this lead should remain disconnected until proper gas flow has been established. Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L... - Page 29 POWER POWER SUPPLY LINE 400A 880 951E C2 R10 R11 R7 R8 R17 R16 R12CR R9 R5 T.I.F. HEATER TEST TEMP CONTROL BD 2-9. C IGURE EATER EMPERATURE ONTROL OARD 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer...
- Page 30 NSTALLATION OTES Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L...
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Page 31: Initial
Internal leaks resulting from failure to observe these precautions could result in an explosion causing death, personal injury or property damage. Note: Never apply power to analyzer without gas flowing. The filaments in the cell tend to deteriorate faster than normal. 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... - Page 32 60 ° ° ° ° F (15.6 ° ° ° ° C) within the next six hours, allow a minimum of 12 hours for the instrument to stabilize. Startup is now complete; the analyzer is ready for calibration per Section 3.4. Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical...
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Page 33: Calibration
After the downscale and upscale calibration points have been established, the analyzer is ready for routine operation per Section 4. If the analyzer has Suppressed-Zero Ranges and does not calibrate properly, refer to Section 6.3 for Suppressed Zero Adjustment. 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... - Page 34 NITIAL TARTUP OTES Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L...
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Page 35: Operation
3.3 and calibrate per Section 3.4. 4.3 SHUTDOWN Before turning off sample gas, and flowing reference gas, if used, disconnect power from the analyzer. This precaution minimizes the risk of filament damage. 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... - Page 36 PERATION OTES Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L...
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Page 37: Theory
(see Section 5.2.1). Periodically, downscale calibration gas is passed through the cell, and the front panel ZERO Pot is adjusted for an appropriate reading on the meter or recorder. 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... -
Page 38: Electronic Circuitry
ANGE ROVISIONS In the basic single-range Model 7D, a jumper is connected from TB3-1 to TB3-4, thus routing the unattenuated output from AR1 directly to the non-inverting input of AR2. During factory assembly of a dual-range or triple-range instrument, the jumper is omitted and a front panel RANGE Switch is connected as shown below. -
Page 39: Thermal Conductivity Cell
IAGRAM OF RIDGE IRCUIT Front Panel Zero Potentiometer Reference Flow Resistor values are in ohms. Sample Flow Bridge Power Bridge Power Supply (+) Supply (-) 5-1. T IGURE HERMAL ONDUCTIVITY 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... -
Page 40: Voltage Output Linearizer Board (Optional)
PTIONAL This option provides isolated current output for applications which require 4 to 20 mA into a maximum load of 1500 ohms. This output is NOT linearized. A description of Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L... -
Page 41: Bridge Power Supply
The center tap is the common reference for both the +15 and -15 volt supplies and is applied to pin R of the circuit board and to test point TP2. Both outputs are used for individual amplifiers on the various circuit boards. 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... -
Page 42: Detector Blocks
(7 and 9) are wired at the factory. Connections of the remaining pins depend upon the application. The relays are rated at 1.0 A, 120 VAC and 5.0 A, 120 VDC, form C, resistive loads. Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical... -
Page 43: Section 6. Service And Maintenance
If bridge balance is unobtainable with the fixed resistors, the problem might be the electronic circuitry. Substitute each circuit board, in turn, until proper operation is obtained. 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... -
Page 44: Thermal Conductivity Cell
2. Admit downscale calibration gas to the analyzer at the same flow rate as is used for the sample gas. Wait for the reading on the meter or recorder to stabilize. Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical... -
Page 45: Bridge Voltage Adjustment
Check continuity with ohmmeter. Verify that resistance is approximately 113 ohms at 25°C. EMPERATURE ENSOR This is an RTD and should have approximately 550 ohms at 25°C. Check for continuity with ohmmeter. 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... -
Page 46: Dual Alarm Module (Optional)
LARM ODULE PTIONAL This module is not user-serviceable. If problems occur, contact Rosemount Analytical service. The module has Zero and Span potentiometers that set the 0 to 5 V input. To check these, adjust the analyzer for zero gas, set the Low Alarm (ALARM 1 on the front panel) set point to 0 %, and turn the Deadband counterclockwise. - Page 47 Set the Range Switch to RANGE 2. In step 4, adjust R6, and in step 5, adjust R7. ANGE Set the Range Switch to RANGE 3. In step 4, adjust R26, and in step 5, adjust R9. 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer...
- Page 48 ERVICE AND AINTENANCE OTES Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L...
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Page 49: Replacement Parts
ARTS The following parts are recommended for routine maintenance and troubleshooting of the Model 7D. If the troubleshooting procedures do not resolve the problem, contact your local Rosemount Analytical service office. A listing of Rosemount Analytical Service Centers is located in the back of this manual. -
Page 50: Temperature Control Assembly
Socket, 20 Pin 901913 Dual Alarm Module 901918 Variable Resistor 1K ohm 7.2.4 R ANGE WITCH Refer to Figures 7-1 and 7-2. 633899 Switch Sealed reference cells must be serviced at factory. Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L... -
Page 51: Analyzer Assembly - Door And Pneumatic Components
(Kit 654648) 901917 SPAN Potentiometer RANGE Switch 898672 (Kit 654892) ALARM 2 Potentiometer REF - (Kit 654648) Hinge Side Flame Arrestor 638426 7-1. A IGURE NALYZER SSEMBLY OOR AND NEUMATIC OMPONENTS 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... -
Page 52: Analyzer Assembly - Electronic Components
Master Board 654620 REF - Hinge Side Fuse 000516 (115 VAC) Temperature Control Assembly 801566 (230 VAC) 652270 Cell Enclosure Alarm Kit 654648 7-2. A IGURE NALYZER SSEMBLY LECTRONIC OMPONENTS Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L... -
Page 53: Temperature Control Assembly
EPLACEMENT ARTS Temperature Control Board Sensor 622917 624006 Thermal Fuse 624433 Sensor 622917 (Ref) Fan Assembly 622733 Heater Assembly 622732 7-3. T IGURE EMPERATURE ONTROL SSEMBLY 748221-L Rosemount Analytical December 2000 Model 7D Thermal Conductivity Analyzer... - Page 54 EPLACEMENT ARTS OTES Model 7D Thermal Conductivity Analyzer December 2000 Rosemount Analytical 748221-L...
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