The Mackwell Emergency Light Auto Test System is used in Fern-Howard's 'Auto Test' emergency fittings. This routinely tests all the fundamental aspects of the luminaire, reporting status through the LED. The unit complies with the draft CELMA specification for Emergency Lighting Testing systems and exceeds its testing requirements.

The Auto Test System goes into self test mode automatically at a suitable time, the test schedule commences within a period of 37 days of commissioning. This is programmed into the modules during manufacture to ensure that no more than 15% of luminaires in an installation are on test in any one day. After this period, tests will be carried out on a 30 day time frame as required, at a period of low risk, normally when the switched supply is off. If a period of low risk does not arise within 7 days of the required test then the test will be carried out immediately. A longer duration test will be carried out every 6th and 12th test.

Three durations of test are provided. Monthly the unit is activated for 5 minutes and the output to the lamp tested at the start and finish; 6 monthly the test will be conducted for 1 hour, and annually the test will be conducted for the full duration of 3 hours.


AUDIBLE ALARM

An audible alarm will sound should a fault condition be found during a test. The alarm will sound for 3 seconds every 35 minutes until the fault condition is rectified and the unit reset.


USER RESET FACILITY

To reset the LED after the fault condition has been rectified, the user simply switches the switched or unswitched supply ON/OFF twice within 10 seconds, either external to or within the luminaire.

Auto test luminaires should be left powered off until the installation is finally commissioned.