AS/NZS 4641(Int):2005

AS/NZS 4641(Int):2005 ELECTRICAL APPARATUS FOR DETECTION OF OXYGEN AND OTHER GASES AND VAPOURS AT TOXIC LEVELS-GENERAL...

PREFACE

CONTENTS

SECTION 1 SCOPE AND GENERAL

1.1 SCOPE

1.2 REFERENCED DOCUMENTS

1.3 DEFINITIONS

1.3.1 Gas properties

1.3.2 Types of instruments

1.3.3 Sensors

1.3.4 Supply of gas to instrument

1.3.5 Signals and alarms

1.3.6 Special state

1.3.7 Times

1.3.8 Miscellaneous

1.4 GENERAL

SECTION 2 REQUIREMENTS PRIOR TO TESTING

SECTION 3 PERFORMANCE TESTS

3.1 UNPOWERED STORAGE

3.2 STANDARD TEST GAS

3.3 FLOW RATE FOR TEST GASES

3.4 INITIAL CALIBRATION

3.5 CALIBRATION CURVE (LINEARITY TEST)

3.6 STABILITY

3.7 ALARMS

3.8 TEMPERATURE VARIATION TEST

3.9 PRESSURE

3.10 HUMIDITY

3.11 AIR VELOCITY

3.12 FLOW RATE

3.13 ORIENTATION

3.13.1 Portable apparatus

3.13.2 Fixed and transportable apparatus

3.14 VIBRATION

3.15 DROP TEST FOR PORTABLE AND TRANSPORTABLE APPARATUS

3.16 WARM-UP TIME

3.17 TIME OF RESPONSE

3.18 RECOVERY TIME

3.19 MINIMUM TIME TO OPERATE (SPOT-READING APPARATUS)

3.20 HIGH GAS CONCENTRATION OPERATION ABOVE THE MEASURING RANGE (NOT APPLICABLE TO 100% RANGE)

3.20.1 Non-ambiguity test

3.20.2 Residual effect test

3.21 BATTERY CAPACITY FOR BATTERY-POWERED PORTABLE CONTINUOUS DUTY APPARATUS

3.22 POWER SUPPLY VARIATION TEST

3.23 POWER SUPPLY INTERRUPTIONS

3.24 ADDITION OF SAMPLING PROBE

3.25 EFFECT OF OTHER GASES/CROSS SENSITIVITY

SECTION 4 FIELD CALIBRATION KIT

APPENDIX A - EVALUATION OXYGEN GAS MONITOR WORKSHEET

APPENDIX B - EVALUATION GAS MONITOR WORKSHEET