AS 4742-2003

1 - AS 4742:2003 EARTH-MOVING MACHINERY - MACHINE-MOUNTED FORWARD AND REVERSE AUDIBLE WARNING ALARM - SOUND TEST METHOD
4 - PREFACE
7 - 1 Scope
7 - 2 Normative references
7 - 3 Definitions
7 - 3.1 machine reference box
7 - 3.2 forward and reverse warning alarm
7 - 4 Apparatus
7 - 4.1 Sound level meter with condenser microphone
7 - 4.2 Acoustical calibrator
7 - 4.3 Windscreen
7 - 4.4 Anemometer
7 - 4.5 Engine rotational frequency indicator
8 - 4.6 Thermometer
8 - 5 Test environment
8 - 5.1 Test area
8 - 5.2 Background noise
8 - 5.3 Climatic conditions
8 - 5.4 Wind
8 - 6 Machine preparation
8 - 6.1 Engine
8 - 6.2 Attachments
8 - 7 Test procedure
8 - 7.1 General
8 - 7.2 Alarm measurement for exterior locations
8 - 7.3 Alarm procedures for operator location
9 - 7.4 Criteria
9 - 7.4.1 Reverse alarm - Exterior test
9 - 7.4.2 Reverse alarm - Operator test
9 - 7.4.3 Forward alarm - Exterior test
10 - Annex A - Data sheet

Specifies the procedure and criteria to evaluate the audible performance of alarms mounted on earth-moving machinery to warn personnel of the hazard of the machine moving under its own power either forward or reverse. It is identical with and has been reproduced from ISO 9533:1989.

First published as AS 4742-2003.