Capacitance Limit Detection Electronic Insert EC 17 Z

1 TechnicalInformationTI268F/00/enOperatin g Instructions017184-1000 ApplicationThe EC 17 Z Electronic Insert is atransmitter for Capacitance limitdetection in conjunction with the limitswitches Nivotester FTC 470 Z, 471 Z,520 Z, 521 Z and with the SilometerFMC 671 Z, 676 Z or the ProlevelFMC 661 for Limit function or forautomatic calibration and Benefits Approval for use in explosion-hazardous areas (EEx ia, FM IS,CSA IS) Connection to the Nivotester,Silometer, or Prolevel over standardscreened installation cable Applicable over a wide Limit DetectionElectronic Insert EC 17 ZTransmitter for Capacitance probesSuitable for use in explosion-hazardous areas(European and North American certificates)Hauser+EndressThe Power of Know HowMeasuring SystemThe complete measuring systemcomprises: one of the Limit switches mentioned inSect. Application a Capacitance probe an Electronic Insert EC 17 Z, which isnormally fitted in the probe high temperatures affect theprobe head, the Electronic Insert can befitted in a separate protection housing,called the HTC 17 PrincipleThe basis of this technique lies in thephysical properties of a capacitanceCof a capacitor isderived from the distancedof theelectrodes, the surface areaAof theelectrodes and the dielectric constant of the intermediate dielectric.

2 The capacitor used in levelmeasurement generally takes the formof the vessel itself and a probe thatextends into the vessel. The vessel walland the probe form the two the vessel is made from non-conductive material, then a counterelectrode must be fitted (e. g. an earthtube, second probe or metal plate). Thiscan also be the second rod of a doublerod distance between the electrodesand surface area remain constant. Theonly variable is the depth of materialbeing measured, which represents thedielectric between the two and vacuum have a relativedielectric constant, for liquidsand solidsis Capacitance of the capacitortherefore depends on how muchmaterial lies between the probe and thevessel wall, i. e., whether the probe iscovered with or free from capacitor is part of an oscillatingcircuit, whose other components arelocated in the EC 17 Z Electronic a free probe the Capacitance islower and the oscillator has a higherfrequency than with a covered Electronic Insert converts theoscillator frequency into a pulsefrequency signal, which is sent to theNivotester, Silometer, or Prolevelsuperimposed on the basic currentover a two-core r=1 r>1 NivotesterFTC 470 ZFTC 471 ZFTC 520 ZFTC 521 ZorSilometerFMC 671 ZFMC 676 ZorProlevelFMC 661probeelectronic insertEC 17 Z.

3 Fitted inprobe headtwo-core cableexplosion-hazardousareaconnected controland signallinginstrumentsorcoaxialcableNivot esterFTC 470 ZFTC 471 ZFTC 520 ZFTC 521 ZorSilometerFMC 671 ZFMC 676 ZorProlevelFMC 661connected controland signallinginstrumentsexplosion-hazardous areaprobetwo-core cablehightemperaturemains supplyelectronic insertEC 17 Z inseparate protectionhousingHTC17 Zmains supplyMeasuring systemfor Capacitance limitdetection2 Installation andElectrical ConnectionNormally the white Electronic insertEC 17 Z is fitted in the probe head andscrewed fitting, connect the earthconnection between terminal 6 and theprobe head is important to select the correctbridge to terminals 3 to 5:Bridge 4 5 is standard for connectingto Nivotester FTC 470 Z, 471 Z, 520 Z,521 Z, Silometer FMC 671 Z, FMC 676 Z,and Prolevel FMC 3 4 should be connected if theprobe projects into conductive materialthat forms a a two-wire screened installationcable for wiring up the Nivotester,Silometer or the screen at both ends;if this is not possible, ground the screento the sensor housing at one with explosion the housing lid and the cableentries tight to prevent the ingress ofmoisture into the probe head the greatest possible accuracy,recalibrate after replacing the of theelectronic Insert EC 17 Z1.

4 Provide earth connectionIdentification colour:white2. Fit Electronic insertand screw inConnection toprobe headSilometer FMC 671 Z, FMC 676 Z(input level Limit )Nivotester FTC 470 Z, FTC 471 ZNivotester FTC 520 Z, FTC 521 ZEC 17 Zororprobeelectronic Insert EC 17 Zearth connectionbridge 4 5 when connectingFTC 470 Z, FTC 471 Z,FMC 671 Z, FMC 676 Z,FMC 661bridge 3 4 with conductive build-upon the probeorProlevel FMC 661(input level Limit )Connection to theNivotester, Silometer,or Prolevel3 Technical DataSupplementaryDocumentationoNivoteste r FTC 470 Z / 471 ZTechnical Information TI 088F/00/enoNivotester FTC 520 Z / 521 ZTechnical Information TI 081F/00/enoSilometer FMC 671 Z / 676 ZTechnical Information TI 064F/00/enoProlevel FMC 661 Technical Information TI 232F/00/enoSeparate housing for Electronic insertTechnical Information TI 228F/00/enCertificatesoCertificate of conformityPTB No.

5 XZE 095F/00 +HauserGmbH+Co. KGInstruments Box 2222D-79574 Weil am RheinGermanyTel. (0 76 21) 9 75-02 Fax (0 76 21) 9 75-3 (a)017184-1000 CCS/CV5 Hauser+EndressThe Power of Know HowElectronic Insert EC 17 ZHousingplastic, potted electronicsIdentification colourwhiteProtection type to DIN 40050electronics IP 55, terminals IP 00 Weightapprox. 120 gPermissible ambient temperature 25 +70 CCertificatesPTB (Germany), FM (USA), CSA (Canada), shipbuilding approvals byABS, BV, DNV, and GLExplosion protection typeEurope:EEx ia IIC T6 (Zone 0 for rod or rope)North America: IS / Cl. I, II, III / Group A GSupply voltageapprox. VBasic currentapprox. 4 mAOperating frequencyapprox. 300 kHzSignal transmissionpulse-frequency-modulation (PFM)Pulse currentapprox. 10 mAPulse widthapprox. 200 sTransmission frequency185 Hz, equivalent to 20 pF for initial Capacitance (bridge 4 5)Electromagnetic CompatibilityInterference Emission to EN 61326, Electrical Equipment Class BInterference Immunity to EN 61326 Electronic Insert in separate housing HTC 17 ZHousingcast aluminiumProtection type to DIN 40050IP 55 Connection to probe2 m coaxial cable, temperature resistant to +200 C, in a flexibleprotection tubing of galvanised steelCapacitance of the coaxial cableapprox.

6 50 pF/mPermissible ambient temperaturemax. +70 C017184- 1000