Echotel Model355 Non-ContactUltrasonic Two …

1 D E S C R I P T I O NEc hotel model 355 is a two -w ire, lo op -po wered,no n-con tact ultrasonic tran smit ter th at performsli quidlevel,vol ume,andopench ann el fl ow meas ur an smi tt ers feature a pow erful60 kHz ultr aso nictr an sdu cer andadvanc ed dig ita l sign al proc ess ing toreli ab ly measureout to a 20 feet (6 m) maximum Mo del 355pr ovidesunsurpassedeaseofcon figuratio n wi theitherthemenu-driven4-push-button,2-l ine 16- characterdi splay, HART di gi tal com mun ica tions, or PA CTware . Thisenab les acomplete configurationto be pe rformedvi a the localuse r int erface, or re mot ely wi th the extr a capabili ty ofca ptu ri ng echowaveforms, an d viewingtrenddata,diagnosticcon ditions, andall tr ans mittercon figu rationpa ram in teg ral mountelectronics ar e ho usedin eitheracas t al uminum housing or Lex an th er moplasti chou sing.

2 Thein tel li gentel ec tr onicsana ly ze theul tra so nicec hoprofile , applyte mperaturecompensat ion,rejectechoes fro m fal se tar gets,and thenpr ocesses the trueechofro m th e li in an ex tre me ly rel iab le measurementevenwh en applicationsdi fficulties lik e turb ulence,rapidlevelch anges, or ech oes fro m fals e targets 60 kHz ultrasonictransduceris of fe redinpo lypropylene,or Kyn ar Flexfor super ior performancein ha rsh envir onments. Thesepowerfultra nsduce rsfeature a 10 con ic al be am and 10"(2 50 mm)bl ocki ngdi stance to maxi mi ze measuremen t capabilitiesin awi de va rietyof appl icat ion P P L I C A T I O N S Ch em ical storagetanks Po nd or ri ver levelmonit or in g Pa int , ink and so lven t tanks In du st rial was tewater processi ng Volu me in bat ch an d day tan ks Openchannelfl ow wei rs an d flu mesF E A T U R E S Tw o-wir e, lo op-power ed trans mit ter for level ,vo lu me an d open ch an nel flo w measurem en t Maxi mu m ran ge of 20 feet (6 met ers)

3 PA CTwarePC pro gram usin g HA RT Communicat ionsfor rem ote co nfig uratio n an d tro ublesh oo tin g Men u- driven4-p ush-b utto n, 2- lin e 16-char acterLC D user in terface Pat ent -pen din g tem per atu re co mpensatedech orejectio n tech nique id en ti fies true echofro m su rf ace Tw o 7-d ig it flo w to talizers, on e resettabl e, and onenon-res et tab le Common tan k sh ap es an d 20- poi nt custom tabl e forfas t an d accurat e vo lu me co nfig urat ion 60 kHz tran sducer wit h 10 beaman gle an d 10"(250 mm) blo cki ng distan ce Dy nam ic basel ine noise compe nsation pr ovide s reliabl epe rformance in the pr ese nce of elect romagneti c noise Gen er ic Dis char ge Flow Equat ion and 35 flum e/weirprim ar y el ements for open ch an nel flow app li cati on sEchotel model 35 5 Non- Cont act UltrasonicTwo- Wi re Tr ansmitterfor Level , Vol um e, orOpen ChannelFl owCastaluminumhousingwithKynarFlex transducerLexan housingwithpolypropylenetransducerRangeB lockingDistanceDistance(measured)Level(r ange- distance)

4 model 355 FlowParshallFlumeLe vel /V olum e App lic ationOpenChan ne l Flow ApplicationT E C H N O L O G YNon-con tact ultr asonicme as urement is obtainedby emit -ti ng an ultr asonicpulsefr om the tra nsducer and mea suringthe tim e requiredfor the ec ho to re flec t fromthe liq uid sur -fac e andreturnto e Mo del355mea suresthe timeof the ro un d tri p pulse,andcalculatesthe dista nce us ing the eq uat io n:D = Dist anceto targetVa= Velo cit y of soundthrough air (1,128ft /sec.)T = Ti me for oneroundtri p so un d pulseSi ncethe speedof sou nd is tem pe rat ure dependent,th etransdu ceral so measures thete mperatureat thetra ns duc er to pr ov ide com pe nsa ti on fo r changing airte vel is computedby the 355electronicsusingthe me asur ed dis ta nc e and the con figuration datathat has been ent er ed for the ves sel in putt in g th e tan k shap e an d 1- 3 dimensions,the elec -tron ic s can calculate the li qu id vol umein th e vess el.

5 In asim ilar oper at io n, th e model 355 can perf ormop en ch an -nel fl ow measurem en t by con ver tin g the levelread in g intounit s of vo lume per tim e. Common tankshapes, flumesand we irs are storedin the 355 20-pointcus -tom tab le is als o avai lab le for unu sual tanksor primaryfl ow elemen ts .D=VaT2P E R F O R M A N C EModel355 Transmitt ers ar e highperformanceunitsthatfe aturea powerful 60 kHz tra nsd ucer, and advanceddigital se fe aturesallowthe 355 toac curat ely tra ck the li qui d levelin di fficult applicat ion slik e turb ulence,rapidlevelch angesor whenech oes fromfals e targ et s ex is t.

6 Thenar row10 beaman gle, sh ownonthe righ t, all ow s the 355 to be us ed in applicatio ns whereoth er un its withwid er beaman gl es fail dueto falserefl ecti ons fromobs tr uct io ns in the tan Radius(r ) vs. Distancer= feetr= E A S U R E M E N T R A N G E C A L C U L A T I O N SUl tr asonic non -co ntac t tra ns mitters ar e typ ical ly rate d fora maximumrangein id eal co ndi ti en ce hassh owntha t the maximu m ran ge mustbe red ucedforcer ta in factors. Alt hou gh th e ma ximum ran ge rating isso me wh at con se rva ti ve,ea ch applicationmustbeeva lu at ed for specif ic co ndi ti ons in th e tan ve ral appl icat io n para me te rs thataffectult rasonicper fo rmance ar e sho wn in the tankat the se pa ra meters is as signeda Pe rfor man ce Multiplierinthe chartbel tip ly th e max imu m po ten ti al range(2 0 feet)of the Mode l 355 by ea ch of the applicablePer for ma nc e Mul ti pli ersto calc ulatethemaximumallo wa ble rang e for the ap pl icati on.

7 PERFORMANCEOP ER AT ING PARAMETE RCONDITIONMULTIPLIERSURFACE AGITATIO N:Sur face agitationor wavescan de gra dethe per fo rma nc e. Moderateagita tion resultsin onl y slight de gr ada -tion of perfor wo rst case is when th e surfaceis a goo dref lect or, but in the wr ong ORS AND STEAM:Vap ors can causeprob lem s when theliqui d proc ess tempe ratur e is well abovethe temp erat ur e of theairsp ace. The gre ate r the difference, th e more expe cte d va porprobl em s. The probl ems result fro m con de nsa tion or lay eri ng in thesou nd pa th, bo th of which atten uate the soun d signal,an d degradeperfo rm an ce.

8 If a vent is us ed, be sure that it is wel l away fro m thetran sd uc AD INT ERF ERENCE:It is recommended that noobst ruc ti on s, such as ladd er run gs, fill pipes, sup port strut s, etc., beallowed within th e 10 ultr asonicbeam an ob structionisunavoi dab le, mak e it as far awa y as possiblefrom the trans du erfe re nce fr om agitatorbladesis onl y an intermittentinterferencethat usually has lit tle effec t on per spec ial so ftware alg o-rith m can also help sup press false echo es fro m agitatorblad es thatare withi n th e beam M:Foam can att enua te th e ultr asoundand rend er th e syst emino perat ive.

9 If po ssible , moving the tr ansdu cer to an ar ea in the tankwhere the re is less fo am will improve the perfo rma nce. Thick, heavy-dens it y foa ms can some time s producea reflection from the to p ofthe foa m. The mul tipl iers show n at right are generalguidel ine s. Forfurth er assistance con sult th e facto , glass- like surface.. agitat ion, choppiness.. vort ex .. condensation .. con densation.. condensation/ foggy appearance .. interference within 5 half beam angle.. speedless than 60 RPM .. speedgreaterthan 60 RPM.

10 ConsultfactoryInterference outside2 , far fromtransducer (in bottomthird of range).. outside2 , near totransducer (in top third of range).. foam.. fr oth, less than " thick .. fo am, less th an " thick .. fo am, more th an 1" thick .. :A slightlyagitated12-foottank with no condensation,no interference,and a light froth on the :20' = feetSince the maximumallowablerange is feet, the 355 is suitablefor this spreadinterferenceBeam spreadinterferenceVapor sFoamSurfaceagitationNOTE : The multip lie rs sho wn above are ge neral gu furtherassistance consultthe factor te ns ive Sel ect ion of Pr imar y Flow ElementsWi th a totalof 35 flumeand weir cur vesstoredin theel ectronics, it wouldbe hardto fi nd an openchannel flowapplic atio n tha t cannotbe handle d by the 35 5 tran sm it te flow applic at ionscan readilybe accomplishe dthro ugh th e use of eith er th e 20-p ointCu stomTableor theGen eri c Discharge Flo w Equatio n w