MSA ORION Manuale utente

FIRE AND RESCUE NSW

RECOMMENDED PRACTICE

FOUR-HEAD GAS DETECTOR

MSA ORION

VERSION 02, ISSUED: FEBRUARY 2011, CID: 06553

This work may be freely reproduced and distributed for most purposes, however some restrictions apply. See the

General Copyright Notice on www.fire.nsw.gov.au or contact Fire and Rescue NSW (FRNSW).

This Recommended Practice contains information, data, documents, pages and images prepared by FRNSW for

training, occupational health and safety, and reference purposes. The material it contains may be incomplete,

inaccurate, or out of date. The State of NSW accepts no responsibility or liability in relation to the use of any

information contained in this document.

Published by:

Specialised Operations

Fire and Rescue NSW

Amarina Avenue

(Locked Bag 13)

Greenacre NSW 2190

Telephone: (02) 9742 7155

Facsimile: (02) 9742 7380

Document Control:

Ve r s i o n A , J a n 2 0 0 5

Version 02, February 2011. (Comprehensive review, update contact details, revisions to troubleshooting and risk

management.)

Supply Catalogue CID:

06553

Acknowledgements:

Mine Safety Appliance Company

Senior Firefighter Daren Ellen

Station Officer Stuart Harvey

Station Officer Timothy Climo

Senior Firefighter Matt Dahlberg

Senior Firefighter Glenn Jackson

Senior Firefighter Andrew Johnson

Senior Firefighter Richard Neville

Filing:

NFB/08514

Working file located at Equipment Development Unit, Greenacre (filed by CI number)

This document rescinds:

Operations Bulletin 2008/07: Orion gas detector extension probe, Ver 01.

Recommended practice: Orion four-head gas detector, Ver A.

Has this document been printed or copied?

Check you have the most recent version by comparing the version number and the issue date on the footer with

those of the document on station portal on the Intranet. The online document is the master.

This document was produced using Adobe Framemaker™ version 8.0. It is intended for release as an electronic

PDF document for online viewing. It is formatted for double-sided printing on station printers. Copies are

available through the Electronic Supply Catalogue.

Four-Head Gas Detector: MSA Orion iii

D.I. Recommended Practice Version 02 Issued February 2011

FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\OrionTOC.fm © Copyright State of NSW (Fire and Rescue NSW) 2011

CONTENTS

Using this Document v

Warnings, Cautions and Notes v

Electronic navigation v

Document control vi

Specific Equipment Warnings vii

Section 1 Introduction 1

1.1 Manual structure 1

1.2 General 1

1.3 Limitations 2

1.3.1 Intrinsic safety 3

1.4 Reading 3

1.5 Contact 3

Section 2 Equipment Fact Sheet 4

2.1 Kit contents 4

2.2 Main features 5

2.3 Control layout 6

2.3.1 The LCDs 6

2.3.2 Control buttons 8

2.4 Specifications 9

2.4.1 Calibration / challenge test gas specification 9

2.4.2 Orion specifications 9

2.4.3 Sensor specifications 10

2.5 Principles of operation 11

2.5.1 The Orion 11

2.5.2 Principles of calibration 11

2.5.3 Explosive limits 11

Section 3 Operations 12

3.1 Safety 12

3.1.1 Risk management 12

3.1.2 Protective clothing 13

3.2 Navigating LCD pages 14

3.3 Before operations 15

3.3.1 Assembling the wand 15

3.3.2 Turning on and pre-operational checks 16

3.3.3 Zero the Orion 17

3.3.4 Challenge test 18

3.3.5 Field calibration 20

3.3.6 Clearing peaks 21

3.3.7 Clearing STEL and TWA 22

3.3.8 Test the pump 23

iv Four-Head Gas Detector: MSA Orion

D.I. Recommended Practice Version 02 Issued February 2011

FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\OrionTOC.fm © Copyright State of NSW (Fire and Rescue NSW) 2011

3.4 Operations 24

3.4.1 Operational hints 24

3.4.2 Heartbeat indicator 24

3.4.3 Alarms – general 24

3.4.4 Gas concentration alarms 25

3.4.5 Battery condition and alarm 26

3.4.6 Datalogging 27

3.5 Turning Off 27

Section 4 Maintenance 28

4.1 Maintenance schedule 28

4.2 After use 29

4.3 Changing batteries 29

4.4 Changing filters 31

4.4.1 External water stop 31

4.4.2 Dust filter 31

4.4.3 Internal water stop 32

4.5 Changing time and date 32

4.6 Downloading data 33

4.7 Troubleshooting 33

4.8 Resupply 34

4.8.1 Calibration gas 34

4.8.2 Other consumables 34

Appendix A Principles of Gas Detection 35

A.1 Short Term Exposure Limit 35

A.2 Time Weighted Average 36

A.3 Combustible gas sensor 36

A.4 Oxygen and toxic gas sensors 37

A.5 Orion sensor configuration 38

A.6 Orion LEL correlation factors 38

A.7 Cross sensitivity 40

A.8 Temperature class 40

Glossary 41

References 43

Index 44

Four-Head Gas Detector: MSA Orion v

D.I. Recommended Practice Version 02 Issued February 2011

FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\How to Use.fm © Copyright State of NSW (Fire and Rescue NSW) 2011

USING THIS DOCUMENT

Warnings, Cautions and Notes

Throughout this manual, the reader will find statements titled: WA R N I NG,

CAUTION or NOTE. These consist of a short piece of information highlighting a

hazard or providing additional clarification, or both. Each of these statements has a

particular meaning, as follows:

WARNING

PERSONAL INJURY MAY RESULT if warnings are not carefully

heeded. Warnings give you precautions for avoiding injury. While the

emphasis of warnings is on avoiding injury, the situations described

may also involve damage to equipment.

CAUTION

EQUIPMENT MAY BE DAMAGED if these recommended

procedures are not carefully followed. Cautions tell you what to do

to avoid such damage. Personal injury is not expected.

NOTE

OPERATIONAL PROCEDURES are clarified. Neither personal

injury nor equipment damage is involved.

Electronic navigation

This document has been produced in PDF format. The electronic document has a

number of features which aid navigation.

• In the left frame of the

Acrobat Reader window are

bookmarks which replicate

the contents page. Click the

bookmark to go to that

heading.

• To expand a bookmark to a

list of subheadings, click the

‘ ’ beside the bookmark.

• In the body of the document

you will find cross references.

For instance: See ‘Electronic

navigation’, highlighted in

blue. Your cursor icon will change to a pointing finger when over a link. Click

these to go to the referenced section, table or figure.

Figure: Selecting bookmarks

vi Four-Head Gas Detector: MSA Orion

D.I. Recommended Practice Version 02 Issued February 2011

FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\How to Use.fm © Copyright State of NSW (Fire and Rescue NSW) 2011

•Thecontentspagehaslivelinks to the referenced pages. Your cursor icon will

change to a pointing finger when over a link. Click the heading to go to that

page.

•Theindexisarrangedalphabetically and has live links to the source text. Your

cursor icon will change to a pointing finger when over a link. Click the page

number to go to the text.

• To return to either the index or contents page, click any other bookmark, and

then click the index or contents bookmark.

Document control

This Recommended Practice is a Fire and Rescue NSW managed document. This

document will become uncontrolled if printed, saved, copied or emailed.

Wherever possible, users should refer to the Fire and Rescue NSW Intranet: Station

Portal for Recommended Practices.

NOTE

If this document has been printed, copied or emailed, check the

validity by confirming the version number and the issue date in the

footer with the those of the document on Station Portal on the

Intranet. Station Portal will always display the most recently

approved document.

Four-Head Gas Detector: MSA Orion vii

D.I. Recommended Practice Version 02 Issued February 2011

FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\Equip Warnings.fm © Copyright State of NSW (Fire and Rescue NSW) 2011

SPECIFIC EQUIPMENT WARNINGS

This is a summary of important warnings and cautions regarding the

Orion four-head detector. It is not an exhaustive list of all the warnings

and cautions you will find as you read the recommended practice.

WARNING

Always wear breathing apparatus (BA) when there is any

possibility of a hazardous atmosphere.

WARNING

The Orion must only be used by personnel trained in its operation.

WARNING

Before use:

•zerotheOrion

• conduct challenge test

• clear peaks, TWA and STEL

• test the pump.

WARNING

The Orion can only detect and measure:

• combustible gases and certain combustible vapours

• oxygen concentration

• carbon monoxide

• hydrogen sulphide.

Do not attempt to measure other gases with the Orion.

WARNING

Changing batteries is not intrinsically safe. Do not change

batteries in a potentially flammable atmosphere.

viii Four-Head Gas Detector: MSA Orion

D.I. Recommended Practice Version 02 Issued February 2011

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This page has been intentionally left blank.

Four-Head Gas Detector: MSA Orion 1

D.I. Rec-ommended Practice Version 02 Issued February 2011

FILE: W:\NB\RP HMRU\Orion\Frame Ver 02\Orion.fm © Copyright State of NSW (Fire and Rescue NSW) 2011

SECTION 1: INTRODUCTION

1.1 Manual structure

This manual consists of five sections:

Section 1: Introduction

Section 2: Equipment Fact Sheet

Section 3: Operations

Section 4: Maintenance

Appendix: Principles of Gas Detection

Index

1.2 General

This Recommended Practice instructs firefighters in the use of the Mine Safety

Appliances Company Orion four-head gas detector (Orion). For how you will use

the Orion at an incident, refer to your training material.

Figure 1 The Orion four-head gas detector

Sampling wandSampling hose

Orion, in

protective

rubber boot

Carry strap Attached

quick start

instructions

2Four-Head Gas Detector: MSA Orion

D.I. Recommended Practice Version 02 Issued February 2011

WARNING

The Orion must only be used by people trained in its operation.

The Orion has a simple, two button operation. It is powered by three AA alkaline

cells. It features an automatic datalogging facility. The Orion uses four sensors to

detect:

• oxygen (O2) percentage in the atmosphere

• carbon monoxide (CO), in parts per million

• hydrogen sulphide (H2S), in parts per million

•combustiblegasesandsomecombustiblevapours as a percentage of the Lower

Explosive Limit (LEL).

The Orion continuously monitors these four conditions. The instrument alarms

when any one condition reaches preset alarm levels. These levels are given in Table

6: Gas concentration alarms, on page 25.

In addition, the oxygen concentration shown by the Orion can be used as an

indicator of other contaminants. See Section 3.4.1: ‘Operational hints’ on page 24

for more information.

Use the Orion when your dynamic risk assessment indicates one of the above

hazardous atmospheres might exist and that atmospheric monitoring is a suitable

control measure. Atmospheric monitoring is mandatory in confined spaces.This

monitoring helps determine:

• the hot zone boundary

•safeOHSlimitsfortheuseofrespiratory and personal protective equipment for

these hazards

• render safe.

Consider adequate fire protection.

If a toxic gas alarms sounds, notify the Incident Controller (IC) and continue

monitoring.

When operating in an ambient temperature above 40 oC and your 10% LEL alarm

sounds, stop your activity and reassess your dynamic risk assessment and incident

action plan. If required, exit and/or seek specialist advice from HMRU on the nature

of the contaminant.

When operating at any ambient temperature in an environment which may contain

carbon disulphide, exit the area if the 10% LEL alarm sounds.

See A.8: ‘Temperature class’, on page 40, for temperature classes of gases.

1.3 Limitations

The Orion indicates the presence of, but does not identify, combustible gases.

The Orion does not measure the toxicity of combustible gases.

Response time is 30 to 45 seconds.

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