Kamstrup MULTICAL 603 - Leakage Limits (V1, V2) >M

MULTICAL®603
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46
KamstrupA/S∙Technicaldescription∙5512‐2029_A1_GB_06.2017
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3.2.8 Leakagelimits(V1,V2)>M<
MULTICAL®603canbeusedforleakagemonitoringwhentwoflowsensorsareconnectedtoMULTICAL®603onthe
inputsV1andV2. Notethatitisonlypossibletoconnecttwoflowsensorsonthecalculatortypes603‐E/F.Seethe
typenumberoverview
inparagraph3.1.
TheMcodedefinestheleakag elimit,i.e.thesensitivityoftheleakagemonitoring.Ifaleakageisdetectedinthe
system,aninfocodeindicatingleakageorburstisactivated,dependingonthesizeoftheleakage.Theleakagesearch
isbasedonadifferencein
mass(ΔMass)betweenthecalculatedmassofV1andV2,respectively.Thecalculationof
thismassdifferenceisperformedover24hours,theresponsetimeoftheinfocodeindicatingaleakagethusbeing24
hours.TheburstsearchisbasedonadifferenceinflowofV1andV2,
respectively.Theburstsearchisperformedover
aperiodof120s.Readmoreabouttheseinfocodesintheinfocodeoverviewinparagraph7.7.
ThesensitivityofaleakagecanbeadjustedviatheM‐code,whereasthesensitivityofaburstisclearlydefined.This
alsoappears
fromthe tableoftheM‐codebelow. Itispossibletodetectleakagesdownto15kg/h throughthe
connectionofthetwoflowsensorsofqp1.5m³/h. Bothinfocodesforleakageandburstcanbedeactivatedviathe
M‐code(M=0).
Leakagelimits (V1,V2)
 M‐code 
Leakage Burst 
Noactiveleaksearch Noactiveburstsearch 0
ΔMass≈> 1.0%ofqp+20%q Δflow>20%ofqp 1
ΔMass≈> 1.0%ofqp+10%q Δflow>20%ofqp 2
ΔMass≈> 0.5%ofqp+20%q Δflow>20%ofqp 3
ΔMass≈> 0.5%ofqp+10%q Δflow>20%ofqp 4
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Permanentoperationalmonitoring
Leakagemonitoringcanwithadvantagebeextendedtoincludepermanentoperationalmonitoringasitjustrequires
theinstallationofasetofthreesensorsinsteadofasensorpair.InDenmark,forexample,thepermanent
operationalmonitoringreducesthenumberofrandomsamplestothreemetersper
randomsamplinglot,regardless
ofthesizeofthemeasuringlot.Readmoreintheinstallationguideforpermanentoperationalmonitoring(Kamstrup
guide5511‐730_DK).Thepurposeoftheseinstructionsistoprovidec aretakers,installersandconsultingengineers
withtheinformationneededaboutKamstrup'sleakagemonitoringsystemandpermanentoperational
monitoring.
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Sensitivity
(∆flow≈∆Masse)
[l/h≈kg/h]
Averageflowperday(q)
[l/h]
Leakagelimit forqp1,5m³/h
M‐kode=2(1,0%afqp+10%q)