BS ISO 9533:2010 pdf download – Earth-moving machinery — Machine-mounted audible travel alarms and forward horns — Test methods and performance criteria
188.8.131.52 Method 2 — Self-adjusting sound level alarm The recorded values from “Alarm On” shall be a minimum of 3 dB greater than the measured values from “Alarm Off” at each test measurement location.
7.5.3 Reverse warning alarm — Operator location test The recorded values from “Alarm On” shall be no more than 3 dB greater than the measured values from “Alarm Off” at test measurement location 9.
7.5.4 Forward horn — Exterior test The forward horn A-weighted sound pressure level shall exceed the A-weighted sound pressure level of the machine at maximum governor engine speed (high idle) by at least 10 dB at test measurement location 8. NOTE Mandatory national and/or regional provisions could also apply to forward horns.
7.5.5 Travel warning alarm — Exterior test
184.108.40.206 General The A-weighted sound pressure level determined at test measurement locations 5, 10 and 11 for the alarm activation test shall meet the sound pressure level criterion given in 220.127.116.11 or 18.104.22.168, as appropriate.
22.214.171.124 Method 1 — Fixed sound level alarm The recorded values from “Alarm On” shall be greater than or equal to the recorded values from “Alarm Off” at each test measurement location.
126.96.36.199 Method 2 — Self-adjusting sound level alarm The recorded values from “Alarm On” shall be a minimum of 3 dB greater than the measured values from “Alarm Off” at each test measurement location.
8 Alarm activation requirements
8.1 Reverse warning alarm The reverse warning alarm shall be automatically activated upon the machine being activated for travelling in reverse. For machines with two independent propel drive systems, e.g. hydrostatic and hydraulic propel drive systems, the reverse warning alarm does not need to be activated and begin sounding until both propel drive systems are activated for reverse travel. Slow reverse movement is allowable without the reverse warning alarm sounding on some types of travel control systems, e.g. mechanical controls, based on a risk assessment having been performed. The reverse warning alarm shall continue to sound until the machine is deactivated for travelling in reverse. 8.2 Forward horn The forward horn shall be manually activated by a dedicated control and continue to sound as long as the operator activates the control within the limits of the horn itself. If the horn is to be used for a security alarm system for the machine, the duty cycle should be set by the horn manufacturer so that the alarm will not permanently damage the horn.
8.3 Travel warning alarm Travel warning alarms shall be automatically activated upon activation of the machine travel control. For machines with two independent propel drive systems, e.g. hydrostatic and hydraulic, the travel warning alarm need not be activated and begin sounding until both propel drive systems are activated for travel. Slow movement is allowable without the travel warning alarm sounding on some types of travel control systems, e.g. mechanical controls. The travel warning alarm signal may have a time limit. This time limit can be either automatic or manual with the following provisions.
⎯ The alarm signal shall be active for at least 5 s.
⎯ The alarm system shall automatically return to normal operation status when the travel control is in neutral or deactivated.
⎯ The alarm shall automatically return to normal operation status when the machine is shut down or turned off (i.e. on machine restart, the alarm will sound during machine travel movement under power).
⎯ The manual control for shutting off the alarm after sounding the required time, if provided, shall be guarded, located or interlocked to avoid unintended activation. This manual control shall be labelled to indicate its purpose and instructions on its use shall be provided in the operator’s manual.
9 Information to be reported Annex A gives the typical format of a test worksheet using this International Standard. The information recorded therein should include the following:
⎯ machine type and serial number (e.g. PIN) and attachment tested;
⎯ engine idle and maximum governor speed (high idle);
⎯ audible travel alarm(s) and forward horn, manufacturer(s) and model(s);
⎯ measurement levels for all test measurement locations for “alarm on” and “alarm off”;
⎯ observations of environmental conditions (temperature, wind speed etc.);