Emerson 951C User Manual

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Instruction Manual

748214-V

June 2009

Model 951C

NOX Analyzer

http://www.raihome.com

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.

Alconox is a registered trademark of Alconox, Inc.

SNOOP® is a registered trademark of NUPRO Co.

WORLD HEADQUARTERS Emerson Process Management Rosemount Analytical Inc.

6565P Davis Industrial Parkway Solon, OH 44139

T 440 914 1261

T 800 433 6076

F 440 914 1262

E gas.csc@emerson.com

Model 951C

Instruction Manual

748214-V

June 2009

 

HIGHLIGHTS OF CHANGES

 

EFFECTIVE JUNE 10, 2009

 

 

PAGE

SUMMARY

Cover

Updated photo, revision number, and release date

P-6

Removed Compliance section

1-1

Added Mid Range

1-2

Added Mid Range

3-1

Added Mid Range, Backlight over range feature, and a note, using the MID

 

range, set the pressure regulator to 2.5 psig.

3-2

Added a photo of the Signal Board, Added a photo of the Signal Board Test

 

Points, removed the signal board diagnostic jumpers (Figure 3-4)

3-3

Removed the Hi/Lo Range Select Jumper (Figure 3-5), Updated the PPM Range

 

selection switch photo and table, removed the decimal point selection jumpers

 

(Figure 3-7), added Configuration Jumper Settings (Figure 3-7)

3-6

Added step 3 to the Zero Calibration Section (In the Mid Range Configuration,

 

Set the Sample Pressure Regulator to 2.5 psig), Added step 3 to the span cali-

 

bration section (In the Mid Range Configuration, Set the Sample Pressure Regu-

 

lator to 2.5 psig), Added step 6 to the span calibration section (Use R25 and R43

 

for fine adjustments to the display and recorder output.)

4-3

Updated the Signal Conditioning and Display section to reflect the current PCB’s,

 

updated the Circuit function section.

4-5

Updated the Analyzer Signal Conditioning Block Diagram

6-1

Updated the MATRIX

6-3

Updated the Replacement Parts List

List of Drawings

Added Drawing 1-1, 1-2, and1-3

Back Cover

Updated Company addresses and contact information

Rosemount Analytical Inc. A Division of Emerson Process Management

Contents i

Instruction Manual

748214-V

June 2009

Model 951C

TABLE OF CONTENTS

PREFACE...........................................................................................................................................

P-1

Definitions ...........................................................................................................................................

P-1

Safety Summary .................................................................................................................................

P-2

General Precautions For Handling And Storing High Pressure Gas Cylinders .................................

P-5

Documentation....................................................................................................................................

P-6

Condensed Startup And Calibration Procedure .................................................................................

P-7

1.0

DESCRIPTION AND SPECIFICATIONS ..............................................................................

1-1

1-1

Overview................................................................................................................................

1-1

1-2

Typical Applications ...............................................................................................................

1-1

1-3

Specifications.........................................................................................................................

1-2

2.0

INSTALLATION ....................................................................................................................

2-3

2-1

Unpacking..............................................................................................................................

2-3

2-2

location ..................................................................................................................................

2-3

1-3

voltage requirements .............................................................................................................

2-3

1-4

Electrical Connections ...........................................................................................................

2-3

 

a.

Line Power Connections .................................................................................................

2-3

 

b.

Potentiometric Recorder Connections ............................................................................

2-3

 

c.

Current Recorder Connections .......................................................................................

2-3

1-5

Gas Requirements.................................................................................................................

2-5

 

a. Air (U.S.P. Breathing Grade) ..........................................................................................

2-5

 

b.

Span Gas ........................................................................................................................

2-5

1-6

Sample Requirements ...........................................................................................................

2-5

1-7

Gas Connections ...................................................................................................................

2-5

1-8

Leak Test ...............................................................................................................................

2-6

3.0

OPERATION .........................................................................................................................

3-1

3-1

Front Panel Indicators and Controls ......................................................................................

3-1

 

a.

Display ............................................................................................................................

3-1

 

b.

Range Selection..............................................................................................................

3-1

 

c.

Sample Pressure Gauge.................................................................................................

3-1

 

d.

Ozone Pressure ..............................................................................................................

3-1

 

e.

Zero and Span Potentiometers .......................................................................................

3-3

 

f.

Ozone Interlock ...............................................................................................................

3-3

3-2

Startup Procedure .................................................................................................................

3-3

3-3

Calibration..............................................................................................................................

3-6

 

a.

Zero Calibration...............................................................................................................

3-6

 

b.

Upscale Calibration .........................................................................................................

3-6

3-4

Routine Operation .................................................................................................................

3-6

3-5

Converter Temperature Adjustment Procedure ....................................................................

3-6

3-6

Measurement of Converter Efficiency ...................................................................................

3-9

3-7

Recommended Calibration Frequency..................................................................................

3-9

4.0

THEORY................................................................................................................................

4-1

ii Contents

Rosemount Analytical Inc. A Division of Emerson Process Management

Model 951C

Instruction Manual

748214-V

June 2009

4-1

Nitric Oxide Determination by Chemiluminescence Method .................................................

4-1

4-2

Analyzer Flow System ...........................................................................................................

4-1

 

a. Flow of Sample, Standard Gas or Zero Gas to Reaction Chamber ...............................

4-1

 

b.

Ozone Generation...........................................................................................................

4-1

4-3

Signal Conditioning And Display ...........................................................................................

4-2

 

a.

Circuit Functions .............................................................................................................

4-2

4-4

Analyzer Thermal System .....................................................................................................

4-3

5.0

ROUTINE SERVICING..........................................................................................................

5-1

5-1

System Checks and Adjustments..........................................................................................

5-1

 

a.

Display Fullscale Span Adjustment.................................................................................

5-1

 

b.

Overall Sensitivity............................................................................................................

5-1

 

c.

Ozone Output..................................................................................................................

5-2

 

d.

Background Current ........................................................................................................

5-2

5-2

Servicing Flow System ..........................................................................................................

5-2

 

a.

Cleaning Sample Capillary..............................................................................................

5-3

 

b.

Ozone Restrictor Fitting ..................................................................................................

5-3

5-3

Photomultiplier Tube/Reaction Chamber ..............................................................................

5-4

 

a.

Removal ..........................................................................................................................

5-4

 

b.

Cleaning Reaction Chamber ...........................................................................................

5-4

 

c. Photomultiplier Tube and Housing..................................................................................

5-5

 

d. Replacement of Photomultiplier Tube.............................................................................

5-6

5-4

Ozone Generation System ....................................................................................................

5-6

 

a.

Lamp/Housing Removal..................................................................................................

5-6

 

b.

UV Lamp Replacement ...................................................................................................

5-7

 

c.

Power Supply Removal...................................................................................................

5-7

5-5

Converter Assembly ..............................................................................................................

5-7

5-6

Servicing Electronic Circuitry.................................................................................................

5-8

6.0

REPLACEMENT PARTS ......................................................................................................

6-1

6-1

Matrix .....................................................................................................................................

6-1

6-2

Circuit Board Replacement Policy .........................................................................................

6-3

6-3

Replacement Parts ................................................................................................................

6-3

 

a.

Common Parts ................................................................................................................

6-3

 

b.

Photomultiplier Assembly 654062...................................................................................

6-4

 

c.

Converter Assembly 654070...........................................................................................

6-5

 

d.

Temperature Control Assembly 654068 .........................................................................

6-6

7.0

RETURN OF MATERIAL ......................................................................................................

7-2

7-1

return of material ...................................................................................................................

7-2

7-2

customer service ...................................................................................................................

7-2

7-3

Training..................................................................................................................................

7-2

8.0

INDEX....................................................................................................................................

8-1

Rosemount Analytical Inc. A Division of Emerson Process Management

Contents iii

Instruction Manual

748214-V

June 2009

Model 951C

LIST OF ILLUSTRATIONS

Figure 2-1. Power Supply Board Voltage Select Switches ..........................................................

2-2

Figure 2-2. Temperature Control Board .......................................................................................

2-3

Figure 2-3.

Cable Gland ..............................................................................................................

2-3

Figure 2-4. Rear View of Model 951C (cover removed)..............................................................

2-4

Figure 2-5.

Rear Panel Wiring Connections ................................................................................

2-4

Figure 3-1.

Model 951C Controls, Indicators and Adjustments...................................................

3-2

Figure 3-2.

Signal Board..............................................................................................................

3-3

Figure 3-3.

Signal Board Test Points ..........................................................................................

3-3

Figure 3-6.

PPM Range Select Switch ........................................................................................

3-3

Figure 3-7.

Configuration Jumper Settings..................................................................................

3-3

Figure 3-8.

Range 2 Selection Jumpers ......................................................................................

3-3

Figure 3-9.

Power Supply Board .................................................................................................

3-5

Figure 4-1.

Analyzer Block Diagram............................................................................................

4-4

Figure 4-2.

Analyzer Thermal System .........................................................................................

4-5

Figure 6-1.

Major Assemblies of the Model 951C .......................................................................

6-3

Figure 6-2. Photomultiplier Housing Assembly ............................................................................

6-4

Figure 6-3.

Converter Assembly..................................................................................................

6-5

Figure 6-4. Case Heater Temperature Control Assembly ...........................................................

6-6

LIST OF TABLES

Table 3-1. Resistance of Converter Temperature Sensor vs. Temperature .....................................

3-7

LIST OF DRAWINGS

Drawing 1-1 Panel Cutout / Installation Drawing

Drawing 1-2 Flow Diagram, Lo/Mid Range

Drawing 1-3 Flow Diagram, Hi Range

iv Contents

Rosemount Analytical Inc. A Division of Emerson Process Management

Model 951C

Instruction Manual

748214-V

June 2009

Rosemount Analytical Inc. A Division of Emerson Process Management

Contents v

Model 951C

Instruction Manual

748214-V

June 2009

PREFACE

The purpose of this manual is to provide information concerning the components, functions, installation and maintenance of the 951C NOX Analyzer.

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. Read this instruction manual completely.

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

748214-V

June 2009

Model 951C

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.

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.

This instrument was shipped from factory set up to operate on 115 volt 50/60 Hz. For operation on 230 volt 50/60 Hz, refer to Section 2-3.

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

WARNING

INTERNAL ULTRAVIOLET LIGHT HAZARD

Ultraviolet light from the ozone generator can cause permanent eye damage. Do not look directly at the ultraviolet source in ozone generator. Use of ultraviolet filtering glasses is recommended.

P-2 Preface

Rosemount Analytical Inc. A Division of Emerson Process Management

Model 951C

Instruction Manual

748214-V

June 2009

WARNING

TOXIC CHEMICAL HAZARD

This instrument generates ozone which is toxic by inhalation and is a strong irritant to throat and lungs. Ozone is also a strong oxidizing agent. Its presence is detected by a characteristic pungent odor.

The instrument exhaust contains both ozone and nitrogen dioxide, both toxic by inhalation, and may contain other constituents of the sample gas which may be toxic. Such gases include various oxides of nitrogen, unburned hydrocarbons, carbon monoxide and other products of combustion reactions. Carbon monoxide is highly toxic and can cause headache, nausea, loss of consciousness, and death.

Avoid inhalation of the ozone produced within the analyzer and avoid inhalation of the sample and exhaust products transported within the analyzer. Avoid inhalation of the combined exhaust products at the exhaust fitting.

Keep all tube fittings tight to avoid leaks. See Section 2-8 for Leak Test Procedure.

Connect rear exhaust outlet to outside vent by a 1/4 inch (6.3 mm) or larger stainless steel or Teflon line. Check vent line and connections for leakage.

WARNING .

PARTS INTEGRITY

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

WARNING.

HIGH PRESSURE GAS CYLINDERS

This instrument requires periodic calibration with a known standard gas. See Sections 2-5 and 3-3. See also General Precautions for Handling and Storing High Pressure Gas Cylinders, page P-5.

Rosemount Analytical Inc. A Division of Emerson Process Management

Preface P-3

Instruction Manual

748214-V

June 2009

Model 951C

WARNING.

TOXIC AND OXIDIZING GAS HAZARD

The ozone generator lamp contains mercury. Lamp breakage could result in mercury exposure. Mercury is highly toxic if absorbed through skin or ingested, or if vapors are inhaled.

HANDLE LAMP ASSEMBLY WITH EXTREME CARE

If lamp is broken, avoid skin contact and inhalation in the area of the lamp or the mercury spill.

Immediately clean up and dispose of the mercury spill and lamp residue as follows:

Wearing rubber gloves and goggles, collect all droplets of mercury by means of a suction pump and aspirator bottle with long capillary tube. Alternatively, a commercially available mercury spill clean-up kit, such as J. T. Baker product No. 4439-01, is recommended.

Carefully sweep any remaining mercury and lamp debris into a dust pan. Carefully transfer all mercury, lamp residue and debris into a plastic bottle which can be tightly capped. Label and return to hazardous material reclamation center.

Do not place in trash, incinerate or flush down sewer.

Cover any fine droplets of mercury in non-accessible crevices with calcium polysulfide and sulfur dust.

WARNING.

TOPPLING HAZARD

This instrument’s internal pullout chassis is equipped with a safety stop latch located on the left side of the chassis.

When extracting the chassis, verify that the safety latch is in its proper (counter-clockwise) orientation.

If access to the rear of the chassis is required, the safety stop may be overridden by lifting the latch; however, further extraction must be done very carefully to insure the chassis does not fall out of its enclosure.

If the instrument is located on top of a table or bench near the edge, and the chassis is extracted, it must be supported to prevent toppling.

Failure to observe these precautions could result in personal injury and/or damage to the product.

P-4 Preface

Rosemount Analytical Inc. A Division of Emerson Process Management

Model 951C

Instruction Manual

748214-V

June 2009

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°F (52°C). A flame should 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.

Rosemount Analytical Inc. A Division of Emerson Process Management

Preface P-5

Instruction Manual

748214-V

June 2009

Model 951C

DOCUMENTATION

The following 951C instruction materials are available. Contact Customer Service Center or the local representative to order.

748214 Instruction Manual (this document)

P-6 Preface

Rosemount Analytical Inc. A Division of Emerson Process Management

Model 951C

Instruction Manual

748214-V

June 2009

CONDENSED STARTUP AND CALIBRATION PROCEDURE

The following summarized instructions on startup and calibration are intended for operators already familiar with the analyzer.

For initial startup, refer to detailed instructions provided in Section 3.

1.Review the Purchase Order from the 951C Analyzer. Make a note of the Range that was purchase (Low Range, Mid Range, or High Range).

2.Set Range switch on the Signal Conditioning Board to position 4, 250ppm, 500ppm, or 2500 ppm (see Figure 3-2, page 3-2).

3.On the Signal Conditioning Board, Verify that Hi/Mid/Lo Range Configuration Jumpers are installed for the Range that was purchase (Figure 3-7, page 3-3)

4.Apply power to the analyzer. The analyzer will now require approximately one to two hours for temperature equilibrium before being ready for calibration.

5.Verify that the pressure regulator on the cylinder of zero gas (nitrogen or air) or sample gas is set for supply pressure of 10 to 17 psig.

6.Verify that the pressure regulator on the cylinder of air (ozonator supply) is set for supply pressure of 20 to 25 psig.

7.Establish correct pressure of sample gas:

a.Supply sample gas to rear-panel SAMPLE inlet at 10 to 17 psig (normally 15 psig).

b.Adjust SAMPLE Back Pressure Regulator so that SAMPLE Pressure Gauge indicates the value appropriate to the desired operating range (normal operating pressure is 3 to 5 psig). Using the Mid range setting, set the sample pressure regulator to 2.5 psig See Figure 3-1.

8.Establish correct pressure of zero gas:

a.Supply zero gas to rear panel SAMPLE inlet and set to 15 psig.

b.Note reading on SAMPLE Pressure Gauge. It should be the same as in Step 6b. If not, adjust output pressure regulator on the zero gas cylinder as required.

7.Establish correct pressure of upscale standard gas:

a.Supply upscale standard gas to rear panel SAMPLE inlet.

b.Note reading on SAMPLE Pressure Gauge. It should be the same as in Step 7b. If not, adjust output regulator on cylinder of upscale standard gas as required.

NOTE

Supply pressure for sample, upscale standard gas and zero air must be the same. If not, the readout will be in error.

8.Zero Calibration:

a.Set PPM RANGE Switch (Figure 3-6, page 3-3) for range to be used for sample analysis. Set the front panel RANGE1 Control at normal operating setting, if known, or at about middle or the range if normal setting is not known.

b.Supply zero gas to rear panel SAMPLE inlet.

c.Adjust front panel ZERO Control for reading of zero on meter or recorder.

9.Upscale Calibration:

a.Set PPM RANGE Switch (Figure 3-6, page 3-3) at setting appropriate to the particular span gas.

Rosemount Analytical Inc. A Division of Emerson Process Management

Preface P-7

Instruction Manual

748214-V

June 2009

Model 951C

b.Supply upscale standard gas of accu-

rately known NOX content to rear panel SAMPLE inlet.

c.Adjust front panel RANGE1 Control so that reading on meter or recorder is equal to the know parts-per-million concentration of NOX in the span gas.

d.Adjust R25 on the signal board so that the Display value and the recorder output are equal.

NOTE

It is the responsibility of the user to measure efficiency of the NO2-to-NO converter during initial startup, and thereafter at intervals appropriate to the application, normally once a month.

P-8 Preface

Rosemount Analytical Inc. A Division of Emerson Process Management

Model 951C

Instruction Manual

748214-V

June 2009

SECTION 1

DESCRIPTION AND SPECIFICATIONS

1-1 OVERVIEW

The Model 951C NOX Analyzer is designed to measure NOX using one of three sets of ranges designated as Hi, Mid, or Lo. The Hi Range set consists of spans with ranges of 0-100, 0-250, 0-1000, and 0-2500 ppm NOX. The Mid Range set consists of spans with ranges of 0-20, 0-50, 0-200, and 0-500 ppm NOX. The Lo Range set consists of spans with ranges of 0-10, 0-25, 0-100, and 0-250 ppm NOX.

The NOX analyzer continuously analyzes a flowing gas sample for NOX [nitric oxide (NO) plus nitrogen dioxide (NO2)]. The sum of the concentrations is continuously reported as NOX.

The analyzer is based on the chemiluminescence method of NO detection. The sample is continuously passed through a heated bed of vitreous carbon, in which NO2 is reduced to NO. Any NO initially present in the sample passes through the converter unchanged, and any NO2 is converted to an approximately equivalent (95%) amount of NO.

The NO is quantitatively converted to NO2 by gas-phase oxidation with molecular ozone produced within the analyzer from air supplied by an external cylinder. During this reaction, approximately 10% of the NO2 molecules are elevated to an electronically excited state, followed by immediate decay to the non-excited state, accompanied by emission of photons. These photons are detected by a photomultiplier tube, which in turn generates a DC current proportional to the concentration of NOX in the sample stream. The current is then amplified and used to drive a front panel display and to provide potentiometric and isolated current outputs.

To minimize system response time, an internal sample-bypass feature provides high-velocity sample flow through the analyzer.

The Backlight blinks when the analyzer is 10% or more over-range. Selecting a less sensitive (higher) range restores the display function.

The case heater assembly of the Model 951C maintains the internal temperature at approximately 50oC (122oF).

1-2 TYPICAL APPLICATIONS

The Model 951C Analyzer has specific applications in the following areas:

Oxides of nitrogen (NOX) emissions from the combustion of fossil fuels in:

Vehicle engine exhaust

Incinerators

Boilers

Gas appliances

Turbine exhaust

Nitric acid plant emissions

Ammonia in pollution control equipment (with converter)

Nitric oxide emissions from decaying organic material (i.e., landfills).

Rosemount Analytical Inc. A Division of Emerson Process Management

Installation 1-1

Instruction Manual

748214-V

June 2009

Model 951C

1-3 SPECIFICATIONS

 

Ranges

 

LO.........................................

0 to 10, 0 to 25, 0 to 100, 0 to 250 ppm NOX

MID .......................................

0 to 20, 0 to 50, 0 to 200, 0 to 500 ppm NOX

HI .........................................

0 to 100, 0 to 250, 0 to 1000, 0 to 2500 ppm NOX

Repeatability..................................

within 0.1 ppm or ±1% of fullscale, whichever is greater

Zero/Span Drift ..............................

less than ±0.1 ppm or ±1% of fullscale, whichever is greater, in 24

 

hours at constant temperature

 

less than ±0.2 ppm or ±2% of fullscale, whichever is greater, over

 

any 10°C interval from 4 to 40°C (for rate change of 10°C or less

 

per hour)

Response Time

 

(Electronic + Flow) ..............

90% of fullscale in less than 1 minute

Sensitivity ......................................

less than 0.1 ppm or 1% of fullscale, whichever is greater

Detector Operating Pressure.........

atmospheric

Total Sample Flow Rate ................

1 Liter per minute at 20 psig

Sample Pressure ...........................

138 kPa (20 psig)

Ozone Generator Gas ...................

U.S.P. breathing-grade air

Ambient Temperature Range ........

4 to 40°C (40 to 104°F)

Analog Output

 

Potentiometric......................

0 to +5 VDC, 2000 ohm minimum load

Isolated Current ...................

Field-selectable 0 to 20 or 4 to 20 mA, 700 ohm max load

Display .................................

Digital, 4-1/2 digit LCD, readout in engineering units, back-lighted

Power Requirements .....................

115/230 VAC ±10%, 50/60 ±3 Hz, 570 W maximum

Enclosure.......................................

General purpose for installation in weather-protected areas

Dimensions....................................

8.7 in. x 19.0 x 19.0 in. (H x W x D)

 

22.0 cm x 48.3 cm x 48.3 cm (H x W x D)

Weight ...........................................

22.2 kg (49 lbs) approximate

1-2

Description and Specifications

Rosemount Analytical Inc. A Division of Emerson Process Management

Model 951C

Instruction Manual

748214-V

June 2009

SECTION 2

INSTALLATION

2-1

UNPACKING

the Power Supply Board (Figure 3-9, page 3-5)

 

 

position voltage select switches S1, S2, S3

 

Carefully examine the shipping carton and con-

(Figure 2-1, page 2-2) and S3 (located on the

 

tents for signs of damage. Immediately notify

Temperature Control Board (Figure 2-2, page 2-

 

the shipping carrier if the carton or its contents

2) in the 230 VAC position.

 

are damaged. Retain the carton and packing

 

 

material until the instrument is operational.

Refer to Figure 2-4, page 2-3. On the rear of the

 

 

analyzer, remove the 6.25 A fuse (P/N 902413)

2-2

LOCATION

and replace with the 3.15 A fuse (P/N 898587)

 

 

provided in the shipping kit.

 

See drawing 654063 for Outline and Mounting

 

 

dimensions.

2-4 ELECTRICAL CONNECTIONS

 

Install analyzer in a clean area, free from mois-

The power and output (recorder and current)

 

ture and excessive vibration, at a stable tem-

cable glands are supplied loose in the shipping

 

°

kit to allow cable installation to connectors or

 

perature within 4 to 40 C.

 

terminal strips.

The analyzer should be mounted near the sample source to minimize sample-transport time.

A temperature control system maintains the internal temperature of analyzer at 50°C (122°F) to ensure proper operation over an ambient temperature range of 4°C to 40°C (40°F to 104°F). Temperatures outside these limits necessitate use of special temperature-controlling equipment or environmental protection. Also, the ambient temperature should not change at a rate exceeding 10°C/hr.

The cylinders of air and span gas should be located in an area of constant ambient temperature (±10°C).

2-3 VOLTAGE REQUIREMENTS

WARNING

ELECTRICAL SHOCK HAZARD

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

This instrument was shipped from the factory set up to operate on 115 VAC, 50/60 Hz electric power. For operation on 230 VAC, 50/60 Hz, on

Cable

Gland Part No.

Power

899330

Recorder

899329

Remove rear cover to access terminals. Route each cable through the cable gland and connect to the appropriate connector or terminal strip, tighten the gland.

a.Line Power Connections

Refer to Figure 2-3 (page 2-3), Figure 2-4 (page 2-3), Figure 2-5 (page 2-4) and drawing 654063. If this instrument is located on a bench or table top or is installed in a protected rack, panel or cabinet, power may be connected via a 3-wire flexible power cord, minimum 18 AWG (max. O.D. 0.480", min. O./D. 0.270"), through the hole labeled POWER, utilizing connector gland (P/N 899330) provided.

Route the power cable through the cable gland and connect the leads to TB1 on the rear panel. Tighten the cable gland adequately to prevent rotation or slippage of the power cable. Since the rear terminals do not slide out with the chassis, no excess power cable slack is necessary.

Rosemount Analytical Inc. A Division of Emerson Process Management

Installation 2-3

Instruction Manual

748214-V

June 2009

Model 951C

The following power cord and/or support feet (for bench top use) are available:

Power Cord 634061

North American power cord set (10 foot)

Enclosure Support Kit 634958

Enclosure support feet (4)

Power Cord/Enclosure Support Kit 654008

North American power cord set (10 foot)

Enclosure support feet (4)

If the instrument is permanently mounted in an open panel or rack, use electrical metal tubing or conduit.

Set switch window for voltage required.

Figure 2-1. Power Supply Board Voltage Select Switches

S3

Set switch window for voltage required.

Figure 2-2. Temperature Control Board

2-2 Installation

Rosemount Analytical Inc. A Division of Emerson Process Management

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