Copyright HK Instruments 2023 www.hkinstruments. Installaon version 4.0 2023
INSTALLATION
INSTRUCTIONS
Measurement probe
FloxactTM
• READ THESE INSTRUCTIONS CAREFULLY BEFORE
ATTEMPTING TO INSTALL, OPERATE OR SERVICE THIS
DEVICE.
• Failuretoobservesafetyinformaonandcomplywith
instruconscanresultinPERSONALINJURY,DEATHAND/OR
PROPERTY DAMAGE.
• Toavoidelectricalshockordamagetoequipment,disconnect
powerbeforeinstallingorservicinganduseonlywiringwith
insulaonratedforfulldeviceoperangvoltage.
• Toavoidpotenalreand/orexplosiondonotuseinpotenally
ammableorexplosiveatmospheres.
• Retaintheseinstruconsforfuturereference.
• Thisproduct,wheninstalled,willbepartofanengineered
systemwhosespecicaonsandperformancecharacteriscs
arenotdesignedorcontrolledbyHKInstruments.Review
applicaonsandnaonalandlocalcodestoassurethatthe
installaonwillbefunconalandsafe.Useonlyexperiencedand
knowledgeabletechnicianstoinstallthisdevice.
To measureair ow accurately in a venlaonduct, use a special
FloXact™measurementprobetogetherwithaDPT-Flowtransmit-
ter.
TherearetwoFloXact™modelsavailable:RmodelforroundductsandLforrectangularducts.Inordertoachievethebestaccuracy,itis
recommendedtousetwoFloXact™-Lprobesiftheheightofarectangularductismorethan350mm,threeprobesiftheductsizeis700mmor
more,andfourprobesiftheductsizeis1000mmormore.
FloXact™-R modelsavailable:100,125,160,200,250,315,400and450andallotherstandardroundductsizesupto1200mm.
FloXact™-L modelsavailable:250,300…1200(50mmsteps)
Lengthoftheprobe(L)isdenedbythewidth(W)oftheduct.(Seestep5).
Othersizesareavailableonrequest.
Example:
fora160mmroundduct,chooseFloXact-R160probe,andfora500x400mmrectangularduct,choosetwoFloXact-L500probes.
step 2: SELECTING THE CORRECT DPT-FLOW MODEL
INTRODUCTION
STEp 1: SELECTING THE CORRECT FLOXACTTM PROBE
WARNING
ItisrecommendedtouseDPT-Flow-1000-AZ-DmodelwithFloXactTMprobesbecausedynamicductpressureisrarelyover500Pa.Typical
pressurerangeinavenlaonductis0…250Pa.
ThemeasurementrangeofDPT-Flow-1000-AZ-Dis0...1000Pa.
Copyright HK Instruments 2023 www.hkinstruments. Installaon version 4.0 2023
STEP 3: INSTALLATION - MOUNTING THE PROBE MOUNTING THE PROBE continued
Figure 1 - Mounng
Figure 2 - Air ow direcon
1)CheckthatthesizeoftheFloXact™probecorrespondswiththe
ductorterminaltowhichitisgoingtobeinstalled.
2)Drillaø25mmholeintotheduct
3)PlacetheFloXact™probe(s)intotheductthroughthehole.
6)ConnectthetubesfromtheFloXact™pressureinletstotheinletin
thepressuretransmier.Connecttheplustubetotheplusinletand
theminustubetotheminusinlet.
• IfmorethanoneFloXactTMprobesused,uset-hoseconnectorto
connecttubesfromseparateprobes.
5)Aachtheprobe(s)intotheductwithtwoscrews.
Figure 3 - Aaching with screws
• Forroundducts,werecommendinstallingtheFloXact™probe
horizontallyintheduct.
4)Checkthatairowdireconintheductcorrespondswiththe
indicaonontheFloXact™probe.
Figure 4
FloXactTM-Lmounng
FloXactTM-Rmounng
When do I need more than one probe? – Check step 1.
• Fornonstandardapplicaons,pleasecontactyournearest
distributororthefactory.
FloXactTM-Rmounngwithtwoprobes.
Copyright HK Instruments 2023 www.hkinstruments. Installaon version 4.0 2023
STEP 4: CORRECT POSITIONING OF THE PROBE
Figure 5 - Correct posioning of the probe: minimum straight duct approach
Roundducts:
D=ductdiameter
Rectangularducts:
Ifthereisahorizontalcurveorchangeintheductsize,D=widthoftheduct
Ifthereisavercalcurveorchangeintheductsize,D=heightoftheduct
Copyright HK Instruments 2023 www.hkinstruments. Installaon version 4.0 2023
Thesellerisobligatedtoprovideawarrantyofveyearsforthedeliv-
eredgoodsregardingmaterialandmanufacturing.Thewarrantyperiod
isconsideredtostartonthedeliverydateoftheproduct.Ifadefect
inrawmaterialsora producon aw isfound, theseller isobligated,
whentheproductissenttothesellerwithoutdelayorbeforeexpira-
onofthewarranty,toamendthemistakeathis/herdiscreoneither
by repairing the defecve product or by delivering free of charge to
thebuyeranewawlessproductandsendingittothebuyer.Delivery
costsfortherepairunderwarrantywillbepaidbythebuyerandthe
return costs by the seller. The warranty does not comprise damages
causedbyaccident,lightning,oodorothernaturalphenomenon,nor-
malwearandtear,improperorcarelesshandling,abnormaluse,over-
loading,improperstorage,incorrectcareorreconstrucon,orchanges
andinstallaonworknotdonebytheseller.Theseleconofmaterials
fordevicespronetocorrosionisthebuyer’sresponsibility,unlessother-
wiseislegallyagreedupon.Shouldthemanufactureralterthestructure
ofthedevice,thesellerisnotobligatedtomakecomparablechanges
todevicesalreadypurchased.Appealingforwarrantyrequiresthatthe
buyerhascorrectlyfullledhis/herduesarisenfromthedeliveryand
stated in the contract. The seller will give a new warranty for goods
thathavebeenreplacedorrepairedwithinthewarranty,howeveronly
totheexpiraonoftheoriginalproduct’swarrantyme.Thewarranty
includestherepairofadefecvepartordevice,orifneeded,anewpart
ordevice,butnotinstallaonorexchangecosts.Undernocircumstance
isthesellerliablefordamagescompensaonforindirectdamage.
STEP 5: Selecting the kv value
WARRANTY POLICY
Figure 6 - Rectangular duct
InFloXact™-RmodelsthereisonlyoneKVvalueanditreadsonthelabeloftheprobe.FortheFloXact™-LKVvaluemustbedeterminedbydimen-
sions(widthandheight)oftheduct.
RECYCLING/DISPOSAL
The parts le over from installaon should be
recycled according to your local instrucons.
Decommissioned devices should be taken to a
recyclingsitethatspecializesinelectronicwaste.
Theairvolumecanbedeterminedwiththe
followingformula:
Q = KV x √Pfs
Q=airvolumeinl/s
K
V=KVvalueinl/s/Pa
Pfs=pressuredierence
measuredbytheFloXactsck
in Pa
Thetableisforairwith1.20kg/m3density
(20°C,50%rHand1013mbar).
TheK-valuefordierentdensiesisdeter-
minedwiththefollowingformula:
CorrectedK-value=Kv*√(ρ/1.20)
K-factor=921xBx(H-0,025n)l/s
B=ductwidthinmeter
H=ductheightinmeter
n=numberofFloXactused
Forintermediatesizes,contactouroce.
Figure 7 - Round duct
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