350.135UK User Manual
The alarm is designed to record maximum readings and average readings over the last 24-
hour period. This allows you to keep track of the presence of carbon monoxide without
needing to be present in the room. To bring up the reading, simply press and hold TEST
button until “Ph=” is displayed on the front screen.
It will move to the next page to show the peak reading for the past 24 hours automatically
after a short wait, or you can manually press the TEST button to enter the next page if you do
not wish to wait. The following page will display “24H” to indicate it will display the average
reading next. Press the button again or wait and the average reading will show. The “PPM”
will flash on the average reading display to differentiate it from the peak reading.
The following menu option allows you to clear the record. When “clr” appears on the screen,
simply press and hold the TEST button until “P--” is displayed which indicates the record has
been deleted.
Maintenance:
In order to maintain the sensitivity of the alarm, dust needs to be removed from the surface
on a regular basis. To dust use a slightly damp cloth, a brush or brush attachment of a
vacuum cleaner. Do not use any solvent based cleaner as the sensor is sensitive to all active
gas including chemical cleaners. Always perform a manual test after cleaning to ensure the
alarm is working normally. Also, the battery compartment needs to be checked on regular
basis for signs of battery acid leakage. Remove batteries immediately if any signs of leakage
occur. Clean the compartment with a clean tissue/cloth before replacing with new batteries.
Avoid below action to prevent the alarm from damage:
Do not allow the alarm to come into contact with any coloured or heavy smelling gas as
this will contaminate the sensor and false readings will occur.
Do not spray aerosols near the alarm, such as: air freshener, insect killer, perfume, hair
spray etc. as this will result in false readings or contamination of the sensor.
Do not paint over the alarm, always remove alarm from the bracket before painting and
wait for paint to be fully dry before reinstalling the alarm.
Avoid shock or impact on the alarm, if accidentally dropped check if the battery connection
is still intact and perform a manual test to ensure the alarm is working correctly.
Do not attempt to repair or modify the alarm. Any modification may cause alarm to
malfunction and fail to operate in a life-threatening situation, therefore modification and
repair is strictly restricted.
In the event of contamination, leave alarm in fresh air for a minimum of 30 mins to up to a
week to see if it recovers. If readings are still false replace the alarm immediately.
