4.2 AUDIBLE ALARMS
The SCOTT INSTRUMENTS
-The preset gas alarm level is exceeded (ALARM)
-The Time Weighted Average (TWA) is exceeded
-The Short Term Exposure Limit (STEL) is exceeded
-The battery is exhausted
-The sensor is missing or incompatible
In addition, each time the instrument is turned ON, the audible alarm will pulse three times.
The following describes the function of the Audible Alarm during the alarm conditions listed above:
GAS ALARM – The Audible Alarm sounds when a gas concentration is de- tected that exceeds the chosen alarm level, or when a TWA or STEL alarm value is exceeded. A repetitive pulsing tone will occur at one (1) second intervals while the alarm condition exists.
In the LATCHING alarm mode, selected in the Alarm Setpoint Menu, after an alarm condition has cleared, the alarm indication will continue until the alarm is acknowledged by depressing a pushbutton. In the
When an Audible Alarm sounds, depressing either pushbutton on the instru- ment will silence the Audible Alarm for thirty (30) seconds. If the original alarm condition still exists after the thirty (30) second silence period, the Audible Alarm will sound again. The Audible Alarm can be silenced repeat- edly by depressing a pushbutton.
LOW BATTERY – An Audible Alarm tone will pulse once every fifteen (15) seconds to indicate when less than 10% of battery life remains.
MISSING SENSOR – The Audible Alarm for a missing or incompatible sen- sor is identical to the pulsing one (1) second tone that occurs during an ALARM condition. Depressing a pushbutton to acknowledge the condition turns the unit OFF.
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