Linear DXS-80, Manual

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SECTION 3
LINEAR LLC
FCC ID: EF4 SST00116
3.8 ALARM SILENCE
When the test switch is depressed momentarily during a CO alarm (below 350
ppm), the piezo will be disabled for 7 minutes. Above 350 ppm, the alarm silence
function is inoperative. If the detector comes out of alarm before the 7 minute
delay expires, the 7 minute counter will be re-initialized. If CO concentration
increases to a higher concentration, the detector will exit alarm silence. The
alarm silence function does not affect the visible LED indication.
3.9 LOW
BATTERY
When a battery is first inserted, a low battery test is performed. If the battery
does not pass this test, the unit gives no indication of operation: the unit does not
initiate a low battery status update and the LEDs do not blink at all. A unit that
passes the initial low battery test then tests for a low battery condition once every
65 minutes. The battery voltage has to be at or below 2.7V nominally for two
consecutive low battery tests before a low battery condition is indicated by output
pin 1 being set high and pin 3 set Low. The green LED will turn off and the red
LED will blink every 45 seconds.
If the detector goes into alarm, the LED blink will match the alarm condition.
Once the low battery condition is present for 7 days, the piezo will begin to chirp.
The piezo will chirp every 45 seconds for an additional 30 days, after which the
piezo, LED’s, output pins 1 and 3 lines will be set high, while CO operations
continue. If an alarm is detected after this event, the unit will attempt a full alarm
signal. However, in this mode of operation, neither CO sensitivity nor alarm
function are guaranteed.
3.10 LED
OPERATION
Red LED Green LED
Power On Reset Blinks every 10 seconds Blinks every 10
seconds,
4 times 4 times
Standby Off Blinks every 10 sec.
Alarm/Test Blinks once every second Off
Low Battery Blinks once every 45 seconds Off
CO End of Life Blinks once every 10 seconds Off
3.11 PIEZO OPERATION
Power On Reset Off
Standby Off
Alarm/Test
Temporal 4 pattern.
Low Battery After 7 days, chirps every 45 seconds for 30 days
CO End of Life One chirp every 45 seconds
3.12 OUTPUT PIN CONFIGURATION
Pin 1 Pin 3
Standby High High
Alarm/Test Low Low
Low Battery Low High