Owner`s manual
- 12 -
DISPLAY MEMORY BUTTON: To manually display the highest CO level detected,
press the DISPLAY MEMORY button once. The LCD will display the recorded data in the
following order:
1. The highest CO level detected from 5 to 500 PPM.
2. The total length of time the monitor has detected the highest CO level, within 10%
of the peak, from 0 to 999 minutes.
Each reading will appear for five seconds. To erase the record in memory, press the
TEST/RESET/MUTE button when the readings are displayed. The monitor will burst a
long beep, and the display reads .
9. TEST AND MUTE MONITOR
To test the monitor, press the TEST/RESET/MUTE button on the cover and hold it down
for a minimum of 2 seconds or until the monitor starts beeping and ALARM red LED
flashes, then release. This test will simulate a CO concentration of approximately 100
ppm CO gas. If all of the electronic circuitry and buzzer are working correctly, the
monitor will sound 4 short beeps and will flash ALARM red LED at the same time,
followed by a 5 second pause, and then repeat 4 more short beeps with flashing ALARM
red LED.
To mute the audible horn during an alarm signal, press the TEST/RESET/MUTE button.
The ALARM red LED will flash 4 times, display will read for 5 seconds, and horn
will be temporarily silenced. The audible alarm signal will be automatically reactivated
within 12 hours if a CO level of 15-24 ppm continues to be detected, or within 5 minutes
if 25 ppm or more. The alarm mute feature is disabled at CO levels of 100 PPM or
more. See Section 10 WHAT TO DO WHEN THE ALARM SOUNDS.
To mute the audible horn during a low battery signal ( ) condition, press the
TEST/RESET/MUTE button. The POWER green LED will blink for 5 seconds, monitor will
display at the same time, and horn will be temporarily silenced for 24 hours. The
LCD will continuously display low battery signal symbol , and current CO level if 5
PPM or more is detected. When the audible signal reactivates, you can continue to
mute the horn for an additional 24 hour period by again pressing the TEST/RESET/MUTE
button. The horn can only be turned off during the first 7 days of a low battery signal
activation. After 7 days, the monitor will return to its normal low battery signal condition;
1 chirp per minute, POWER green LED blinks for 5 seconds, continuously displays .
To test the monitor during a low battery signal condition, press and hold
TEST/RESET/MUTE button for minimum 2 seconds when audible signal is not sounding.
To mute the audible signal during an “End-of-Life” condition, press the
TEST/RESET/MUTE button. The SERVICE red LED will glow for 5 seconds, monitor will
display at the same time, and horn will be temporarily silenced for 60 hours. When
the audible signal reactivates, you can continue to mute the horn for an additional 60
hour period by again pressing the TEST/RESET/MUTE button. The horn can only be
turned off during the first 30 days of the “End-of-Life” signal activation. After 30 days,
the monitor will return to its normal “End-of-Life” condition; 1 chirp per minute, SERVICE
red LED glows for 5 seconds at the same time, and continuously displays “End”.










