Tech Guide - Technical Bulletins

Audible Alarm Environmental Tests

For the LSC/MSO/MSR/SBM/SC/SCE/SNP/VSB/ZA series, the following environmental tests are used during the validation and verification design phases:

Test Name Description of Test
Surge Voltage 15% over maximum rated voltage applied for one minute.
Reverse Voltage Maximum reverse polarity equal to rated voltage for one minute.
Intermittent RT Life A duty cycle of 1 second on and 1 second off, for a minimum of 25,000 times at room temperature at maximum rated voltage.
Hot Life* 250 hours continuous operation at maximum rated operating temperature and maximum rated voltage.
Cold Life* 250 hours continuous operation at maximum rated operating temperature and minimum rated voltage.
Hot Storage* 250 hours at maximum rated hot storage temperature (no voltage applied)
Cold Storage* 250 hours at maximum rated cold storage temperature (no voltage applied)
Humidity 95% relative humidity @ 40C for 100 hours (no voltage applied).
Salt Spray 96 hours in an atomized 5% salt spray solution at 35C (no voltage). Test not applicable to MSO, MSR, SBM, SNP, & VSB series.
Terminal Strength 5 lbs applied axially for a period of 5 minutes

*For the SC Rugged/Military series, Life and Storage test times are extended to 500 hours.

For all other Mallory alarm series, the following environmental tests are used:

Test Name Description of Test
Cold Life 100 hours at maximum rated cold storage temperature
Hot Life 100 hours at maximum rated hot storage temperature
RT Life 1000 hours at maximum rated voltage at room temperature
Humidity 100 hours at 95% relative humidity @ 40C
Drop Test A natural drop from 75cm down to the ground
Vibration 2kHz per min; 2mm amplitude applied in X, Y, & Z directions for 30 mins each.

Call 317-612-1000 or contact us for more details