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  • Application 143 EN - KROHNE...KROHNE 5/2010-143-Subject to change without notice. 3. KROHNE Solution KROHNE supplied 7 OPTIWAVE 7300 C radar level measuring devices and one BM 26 W
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Tank farm for solvents at a road building materials manufacturer • Continuous monitoring of current tank inventory • 2-wire connection technology • Maintenance-free, non-contact level measurement 1. Background A Swiss customer operates a tank farm for solvents required in the production of road building materials. In the past, measuring devices based on mechanical measuring principles were used to measure the levels in the tanks. They were extremely inaccurate and required significant maintenance. The end products are • standardised, special binding agents for road surfaces containing bitumen, • bitumen emulsions for repairing and building roads, • special emulsions for surface recycling and slurry surfacing. • binders for the surface treatment as well as • special products to protect, repair and reconstructing road surfaces. 2. Measurement requirements Radar level measuring devices were the only option when it came to upgrading the tank farm as ultrasonic devices are not suited to the properties of the products. Non-contact measurement was also an important requirement for using radar measuring devices. One further requirement was the two-wire connection technology used to keep wiring costs to a minimum. A special measuring principle was required for the lower chamber of one 2-chamber tank. This level measurement now takes place using a bypass measuring device which also meets the requirements outlined above. The measuring devices must be easy to configure using communication technology from one measuring station and they must support the remote retrieval of measured values. APPLICATION NOTE Chemicals Bypass measurement on a 2-chamber tank

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Page 1: Application 143 EN - KROHNE...KROHNE 5/2010-143-Subject to change without notice. 3. KROHNE Solution KROHNE supplied 7 OPTIWAVE 7300 C radar level measuring devices and one BM 26 W

Tank farm for solvents at a road building materials manufacturer

•Continuousmonitoringofcurrenttankinventory•2-wireconnectiontechnology•Maintenance-free,non-contactlevelmeasurement

1. Background ASwisscustomeroperatesatankfarmforsolventsrequiredintheproductionofroadbuildingmaterials.Inthepast,measuringdevicesbasedonmechanicalmeasuringprincipleswereusedtomeasurethelevelsinthetanks.Theywereextremelyinaccurateandrequiredsignificantmaintenance.

Theendproductsare•standardised,specialbindingagentsforroadsurfacescontainingbitumen,•bitumenemulsionsforrepairingandbuildingroads,•specialemulsionsforsurfacerecyclingandslurrysurfacing.•bindersforthesurfacetreatmentaswellas•specialproductstoprotect,repairandreconstructingroadsurfaces.

2. Measurement requirements

Radarlevelmeasuringdevicesweretheonlyoptionwhenitcametoupgradingthetankfarmasultrasonicdevicesarenotsuitedtothepropertiesoftheproducts.Non-contactmeasurementwasalsoanimportantrequirementforusingradarmeasuringdevices.Onefurtherrequirementwasthetwo-wireconnectiontechnologyusedtokeepwiringcoststoaminimum.Aspecialmeasuringprinciplewasrequiredforthelowerchamberofone2-chambertank.Thislevelmeasurementnowtakesplaceusingabypassmeasuringdevicewhichalsomeetstherequirementsoutlinedabove.Themeasuringdevicesmustbeeasytoconfigureusingcommunicationtechnologyfromonemeasuringstationandtheymustsupporttheremoteretrievalofmeasuredvalues.

APPLICATION NOTE Chemicals

Bypass measurement on a 2-chamber tank

Application 143 EN.indd 1 05.05.2010 15:32:07 Uhr

Page 2: Application 143 EN - KROHNE...KROHNE 5/2010-143-Subject to change without notice. 3. KROHNE Solution KROHNE supplied 7 OPTIWAVE 7300 C radar level measuring devices and one BM 26 W

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3. KROHNE Solution

KROHNEsupplied7OPTIWAVE7300CradarlevelmeasuringdevicesandoneBM26Wradarbypassmeasuringdevice.

AlldevicesfunctionbasedontheFMCWradarmeasuringprinciple.

ThePACTwareandDTMsincludedasstandardmakeitpossibletoconfigureandrecordthemeasuredvaluesofthelevelmeasuringdevicesfromthemeasuringstation.

4. Customer advantages

Fromthemeasuringstationitisnowpossibletocontinuouslymonitorthecurrentinventory.Assoonasthepresetmaximumlimithasbeenreachedwhenfillingthetank,thepumpsareswitchedoff.Thiseliminatestheneedfortime-consumingon-sitemonitoring.Oncethepresetminimumlevelhasbeenreached,newsuppliescanbeordered.Thebypasssolutionforthe2-chambertankwiththeBM26WfunctionsasreliablyastheKROHNEOPTIWAVE7300CFMCWradarmeasuringdevicesinstalledonthetanks.

Themeasuringdeviceshavealreadyproventhemselvesinpracticeandareworkingsmoothly.

5. Products used

OPTIWAVE 7300 C • Precisemeasurementindifficultconditions–evenintankswithagitatedsurfaces,foamorinternalobjects

• Producttemperatureupto200°Candoperatingpressureupto40bar• Measuringrangeupto80m• PACTwareandDTMsarepartofthestandardscopeofdelivery• Standardmeasurementdeviation≤±3mm• 2-wireconnectiontechnology,minimalwiringexpense• Maintenancefree

BW 26 W• Precisemeasurementindifficultconditions• Producttemperatureupto300°Candoperatingpressureupto120bar• Measuringrange0.5to6m• PACTwareandDTMsarepartofthestandardscopeofdelivery

Contact

PleasevisitourwebsiteforacurrentlistofallKROHNEcontactsandaddresses.

APPLICATION NOTE

Installation on top of tanks

OPTIWAVE 7300 C

BM 26 W

Application 143 EN.indd 2 05.05.2010 15:32:15 Uhr


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