Thermal Alarm - MSA G1 SCBA Operating Manual

Control Module

Thermal Alarm

WARNING!
Although this thermal alarm provides an indication that the temperature/time curve is exceeded, the
curve may not represent the threshold to injury due to variations in individuals and the protective
clothing worn. Use this alarm as a reference only to increasing temperature/time. Do not use as a
substitute for standard operating procedures regarding escape from temperature/time extremes.
Misuse can result in serious personal injury or death.
The control module can monitor thermal conditions if the thermal alarm option is activated. The
thermal alarm can be set to either a primary alarm or secondary alarm. Secondary alarm is the default
condition. If the user is exposed to more than the pre-set limit of thermal load (temperature/time), the
secondary alarm on the control module will display and the power module will sound a tone every
5 seconds.
The figure below shows the control module thermal alarm activation curve. The temperature/time
limits correspond to this graph. The thermal alarm sounds if the preset limit exceeds the curve
displayed on the graph. The alarm will self-cancel depending on the severity of conditions. This may
occur even though the temperature is above the thermal curve.
US
NOTE: This chart was generated from data obtained in a laboratory setting and is for reference only.
Conditions are highly variable in an actual use scenario. Users of the control module with the thermal
alarm option should develop procedures for the use of this feature.
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G1 SCBA