12
UNDERSTANDING THE
PRODUCT’S INDICATORS
Digital Display
TheLCDscreenhasmanyiconswithoneor
morebeingshownatanyonetime.
Bar Graph to show early build up of CO
To understand the role of the product
indicators please refer to section ‘Carbon
Monoxideandhowitcanaectyourfamily’
onpage3.Thealarmhasabargraphwhich
mimics the way CO levels build up in the
blood stream. The response times of the
alarm are determined by the European
Standard EN 50291-1: 2010 so the alarm
will only sound when it has detected CO
for a prescribed length of time, the higher
the level of CO thequicker the alarm must
sound. However with FireAngel’s CO-9D
there is an early visual warning that CO is
present.WhenCOisrstdetectedthealarm
indicatesit’spresencebydisplayingthelevel
on the screen in parts per million (ppm). If
CO continues tobe present additional bars
will appear on the graph. When the graph
isfulli.e.the6thsegmentisshowntheunit
thealarmisworkingcorrectly.Ifyouhaveany
questions about testing the sensor please
contactthetechnicalsupportteam(seepage
21forfreephoneandemailcontactdetails).