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• Afterthewarm-upphaseisover,the“0”symbolflashesonthescreen,indicatingthattheinstrumentisreadyforuse;thebuzzericonislit,
andtheinstrumentmakesasoundeverysecond.Youcanpressthe“MUTE”buttontomutethebuzzer.Ifthebuzzerisalreadymuted,press
the “MUTE”buttonagaintoreactivatethebuzzer.
• Bydefault,theinstrumentassoonasitisturnedonwillperformasensorautozero,andtheautozeroicon(A)willbelitred.However,the
autozerofunctioncanbedisabledbyholdingdowntheautozerobutton“RESET”foratleastthreeseconds;thentheinstrumentwillbein
themanualautozeromode.Theautozeroinmanualmodecanbedonebybrieflypressingthe“RESET”button;pressingthisbuttonforthree
secondswillre-enabletheautozeromode.Whentheinstrumentisrestarted,theautozeromode(A)willberestored.
• Afterthewarm-upphase,thesensitivityicon(S)willbered,indicatingthatthedeviceisatitsmaximumsensitivity.
• Placethenoseoftheprobewherealeakismostlikelytohaveoccurred.Iftheinstrumentdetectsaleak,itwillreportaleaklevelonthe
displaythatisproportionaltotheamountofgasdetectedandwillemitasound;thegreatertheleak,thesharperthesoundemittedbythe
instrument.Itisrecommendedtomovetheinstrumentoutoftheareaoftheleakforatleast10secondsbeforemakinganewdetectionpass.
• Whentheworkisnished,pressthe“OFF/ON”button3secondstoturnofftheinstrument.
Note:Removetheinsulationsheetfromthebatterycompartmentbeforerstuse.
CAUTION:Pressingthe“SENS”buttoncyclesbetweenthreelevelsofinstrumentsensitivity(green=minimum,yellow=medium,red=maximum).
4.1 Gas detection method
Thegurebelowexempliesthemethodofleakdetection:
• Bendtheexibleendoftheinstrumentintotheshapethatbestsuitsthecaseathand;slowlymovetheprobeclosertotheleakage
point.
• Iftheinstrumentdetectsaleakitwillsignalthisbyshowinganumberfrom1to7onthedisplay,where1istheminimumconcentration
leveland7isthemaximum.Atthesametime,theinstrumentwillemitasoundtosignalthepresenceofgas,thehigherthefrequency
the higher the gas concentration.
• Standbackandapproachtheareaofsuspectedgasleaktoconrmthatthereisindeedaleakatthatlocation.
• Whenthesourceoftheleakhasbeenfound,itisnecessarytoreportitandchecktheentiresystemuntilallleakshavebeenfoundand
properly reported.
4.2 Automatic and manual autozero setting
Soastoavoidtheinterferenceondetectioncausedbyrefrigerantintheenvironment,thedetectorallowsthesensortoautomatically
self-zero.
Automaticautozero(Default): When the AIconisturnedon,theinstrumentwillautomaticallyautozerotheroomgasconcentration
and,onlywhenitdetectsahigherconcentration,itwillactivatethebuzzer.Thisoptionisonbydefault;todiasttivateitandbringthe
instrumentintomanualautozeromode,pressthe“RESET”buttonfor3seconds.
Reset(Autozero)manual:Incasethemanualmodeison,sensorzeroingcanbedonebybrieypressingtheautozero“RESET”button.
When the screen shows ‘8’,itmeansthatthezeroinghastakenplacecorrectly.Atthispoint,agasconcentrationhigherthantheambient
concentrationcanbedetected.Toreturntheinstrumenttoautozeromode,pressthe“RESET”keyfor3seconds.
Note:Ifthegasconcentrationintheenvironmentisverylow,theAutozrerofunctionwillmaketheinstrumentmoresensitive,andviceversa,
ifthereisahighgasconcentrationintheenvironment,theinstrumentwillbelesssensitive.