1. IntrodUCtIon
ThisinstallationguidedescribeshowtoinstallUltrasonicGasLeakDetectorsGassonicMM0100/EH6028
andhowtomakethenecessarychecksandadjustmentstoensureoptimalperformance.
2. desCrIptIon of GassonIC MM0100 / eH6028
TheGassonicMM0100/EH6028detectsleaksfrompressurisedgassystemsbysensingtheairborne
ultrasoundproducedbythegasescaping.ThisdetectionmethodisOmni-directional.Itcanfunctionin
extremeweatherconditionsandisidealformonitoringleaksfromvalvesandangesincomplexpipeline
systems,bothonshoreandoffshore.
TheGassonicMM0100detectorhasanadjustablealarmtriggerlevelsetting(7levels,from44to104dB
in10dBsteps)andaninternaladjustablealarmdelayfrom0–480seconds.Iftheinternalalarmdelay
issettozero,analarmdelayofatleast15secondsshouldbeintroducedatthecontrolsystem.These
functionsenablethedetectortorecogniseleaksmoreeasilyandpreventtheoccurrenceoffalsealarms.
TheGassonicEH6028detectorhasanadjustablealarmtriggerlevelsetting(10levels,from54to99dB
in5dBsteps)andnointernalalarmdelay.Itisnecessaryforanalarmdelayofatleast15secondstobe
introduced at the control system.
Ex approved isolators must be used to limit the current and voltage to the detector. These isolators need
tobeinstalledinthenon-hazardousarea.ThedetectorssatisesATEX–EEx ib IIC T6andUL/ULC–Class
1/Div. 1/ Group ABCD classifications. It is certified by DEMKO (certificate no. DEMKO 02 ATEX 131173X
andULFile/NO.E228468).CopiesofthecerticatesareavailableonrequestfromyourlocalGassonic
representative.
3. InstallInG tHe deteCtor
3.1. Area Monitored by Gassonic MM0100 / EH6028
Sound in Air:
Soundpressurelevels(SPL)decreaseby
approximately6dBeachtimethedistance
is doubled.
This means that if a gas leak generates
aSPLof100dBat1metretheSPLwill
dropby6dBeverytimethedistancefrom
thegasleakisdoubled.Asillustratedin
thediagram,theSPLat2metreswillbe
94dB.
