Magnetostriktiven Messumformer für Flüssigkeitsfüllstand

1. Principal The magnetostrictive Level transmitter will precisely sense the position of an external float by applying an interrogation pulse to a waveguide medium. This current pulse causes a magnetic field to instantly surround the waveguide. The magnet installed within the float also creates a magnetic a magnetic field. Where the magnetic fields from the waveguide and float intersect, a rotational force is created (waveguide twist). This, in turn, creates a torsional-sonic pulse that travels along waveguide as shown in Figure 1 Principal of magnetostrictive. The head of the sensing element houses the sensing circuit, which detects the torsional-sonic pulse and converts it to an electrical pulse. The distance from a reference point to the float is determined by measuring the time interval between the initiating current pulse and the return pulse and precisely knowing the speed of these pulses. The time interval is converted into a 4-20 mA loop signal. The Level transmitter offers level, interface, or temperature outputs. There are current loops available; any output may be assigned to either of the two loops. 2. Features and Applications 2.1 Features Modular design High accuracy and repeatability level and interface Measurement Temperature Measurement Explosion-proof and/or Intrinsically Safe No maintenance required 2.2 Applications Process Level Measurement Bulk Storage Magnetic Level Gauge Transmitters Pharmaceutical Biotech Semiconductor Speciality Chemical Process Chemical LPG 3. Specifications l Input voltage range: 24V±2.4V.DC l operating temperature: Electronics: normal temperature0 + 70 wide temperature:40 + 8 Sensor: 40 110 l Length (including housing) 100mm5000mm l output 420mA05V010V l Non-linearity ≤±0.05%FS Or ≤150μm (length ≤ 300mm) l z Repeatability ≤±0.002%FS l z Temperature Drift: 50ppm/ l Power Consume ≤50mA l Wave of output ≤20mV l Dead area up dead area,42mmdown dead area,30mm l loads 420mA load resistance≤500Ω l 05V,010Vimpedance<20Ω l sensors material 0Cr18Ni91Cr18Ni9Ti or by user l Electronics material 1Cr18Ni9Ti or by user l Wiring: 1: 4-wire connection, shielded cable,standard 1.5m, Max: 20m 2: aviation connecter l Materials (wetted parts) 1Cr18Ni9Ti0Cr17Ni12Mo200Cr17Ni14Mo2 l Mounting M18×1.5M20×1.53/4-16UNF-2A l Explosion-proof rating ExdIIBT5 l Ingress Protection IP65