Oval Wheel Meter OI UST1 with Universal Smart Transmitter with HART® Communication
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Oval wheel meters now smart Oval Wheel Meter OI UST1 with Universal Smart Transmitter with HART® Communication Designed for the process : • direct measurement of volume resp. of volumetric flowrate • measurement at high viscosities • high accuracy • only 2 moving parts (oval wheels) • 2-wire-technique Measuring principle Oval wheel meters are positive displacement flowmeters. The measuring element consists of two meshing precision oval wheels, driven by the fluid. Each revolution of the oval wheels displaces a precisely known volume of liquid through the meter. The number of revolutions therefore is directly proportional to the measured volume. The pulses generated by a Wiegand pulse transmitter with high pulse resolution are processed in the electronic converter UST1 and converted. Technical Data measured error (accuracy) OI 03, OI 06, OI 1, OI 2: ± 0,3% to ± 1% (depending from flow range and liquid) OI 5, OI 10, OI 50, OI 100, OI 200; OI 400: ± 0,1% to ± 0,3% (depending from flow range and liquid) 0,02 % of measured value operating temperature ambient temperature electrical connection sensor supply 14 – 30 VDC 2 - wire – technique, 4-20 mA, HART® or current pulses ( without HART® ) wetted parts stainless steel 1.4571 OI03 - OI 2: also in brass/bronze safety class electronics housing: cast aluminium DMT 99 ATEX E014X EEx ia IIC T6 DMT 99 ATEX E0125X EEx d [ia] IIC/IIB T6 DMT 99 ATEX E0125X EEx de [ia] IIC/IIB T6 acc. to EMV guidelines 89/336/EWG, 92/3/EWG, 93/68 EWG, EN 50081-1, EN 50082-2, and NAMUR NE 21 DTM-Driver according to FDT-technology 1.2 are available.

Main dimensions The arguments for Oval Wheel Meter OI with UST1 ... based on the proven Oval Wheel Meter principle • direct measurement of volume and flowrate • long meter life and reliability • measurement at high viscosities • measurement of non-conductive liquids • measurement at low flow velocities • highest accuracy/repeatability • no influence of flow profile • no drift of zero point • only 2 moving parts (oval wheels) • non-interacting Wiegand pulse transmitter ... combined with a modern electronics suitable for communication connection diagram Transmitter power supply unit HART...