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American Sensor Laser and Microwave Meter MWS3000K24 User Manual
American Sensor Laser and Microwave Meter MWS3000K24 User Manual
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557 Long Road Pittsburgh, PA 15235, USA Email: [email protected] www.americansensors.com Tel: 412-242-5903 fax: 412-242-5908 2014 MWS-3000-K -24 1 MWS-3000-K-24 MICROWAVE LEVEL METER FEATURES: FMCW to enhance precision Measurements unaffected by environmental conditions such as dust, heat, noise, vapor, or light Simple configuration for easy installation and maintenance Minimal maintenance APPLICATIONS: Measurement of distance, level, and volume of liquids, pastes, and solids
557 Long Road Pittsburgh, PA 15235, USA Email: [email protected] www.americansensors.com Tel: 412-242-5903 fax: 412-242-5908 MWS-3000-K -24 2 of 4 DESCRIPTION The MWS-3000-K-24 gauge is a level meter based upon FMCW (frequency modulated continuous wave) radar signal. It is designed for measuring distance, level, volume and reflectivity of liquids, pastes, slurries, and solids. It can also form part of an overfill protection system. The MWS-3000-K-24 is a new-generation level meter with a wizard-driven setup, fully potted electronic subassemblies. Today most popular sensors types at industry applications that could meet the performance requirements for high- accuracy non-contact level measurement are laser, acoustic, microwave radar. While laser and acoustic sensors work well in liquid level measurement, they become helpless at conditions of high dust level, strong air current and extremely high noise. The whole measuring system consists of a flange system and a signal converter. The flange system includes the microwave window, which protects the converter electronics from the process and the antenna system. The compact signal converter contains the microwave generator and the entire signal processing system, including provision of a 4-20mA DC output signal or digital interface. OPERATING PRINCIPLE The FMCW-radar transmits a high frequency signal whose frequency increases linearly during the measurement phase. The signal emitted via an antenna, is reflected on the measuring surface and received after a time delay t. For further signal processing, the difference df is calculated from the actual transmit frequency and the received frequency. The difference is directly proportional to the distance, i.e., a large frequency difference corresponds to a large distance and vice versa. The frequency difference is transformed via a Fourier transformation (FFT) into a frequency spectrum and then the distance is calculated from the spectrum. Internal Signal Processing
557 Long Road Pittsburgh, PA 15235, USA Email: [email protected] www.americansensors.com Tel: 412-242-5903 fax: 412-242-5908 MWS-3000-K -24 3 of 4 TYPICAL APPLICATIONS Any level Measurement when a very good accuracy is needed Level measurement using plate at 45° angle for signal reflection
557 Long Road Pittsburgh, PA 15235, USA Email: [email protected] www.americansensors.com Tel: 412-242-5903 fax: 412-242-5908 2014 MWS-3000-K -24 4 SPECIFICATIONS: Microwave oscillation power 5mW Measures per second 1 Wires 2 Accuracy 3mm ±0.03% of measured distance (if > 10 m) Measuring range 0.5 to 80m (1,5 to 262 ft) Output 4-20mA or 3.8 - 20.5mA / HART Error signal 3.6mA and 22mA Ambient temperature -40 to 80°C (-40 to 175°F) Flange temperature -40 to 200°C (-40 to 300°F) Operating pressure -1 to 40 bar Antenna type Length: 125mm Diameter: 75mm (3) Weight 11kg (24.3 lb) Length 305 mm (12) Frequency 24GHz Sweep (resolution) 2GHz A/D converter 16 bits Gain steps 8 Extensions - Transmission angle (with the vertical) 5° Expansion 8cm/m Curved Extension No CONNECTION AND DIMENSIONS ORDERING 24VDC