MEASUREMENT SYSTEMS Ethernet/Internet Capable LEFM 880 Flow Meter The LEFM 880 ultrasonic flow meter system provides extremely accurate and reliable flow measurement for large pipes, hydroelectric penstocks and open channels. The LEFM 880 flow meter system consists of electronics and transducers. Each LEFM 880 transmitter is designed to operate with up to 8 pairs of transducers, to allow optimized velocity profile integration in various hydraulic conduits. The LEFM 880 has an integral display and digital and analog output capability. The NEMA 41IP 66 enclosure is designed for rugged or remote applications. The LEFM 880 flow measurement systems incorporate several state-of-the-art features that offer much improved reliability, accuracy and data management over competitive systems. Transit-time flow meters rely on accurate timing of time ultrasonic signals transmitted between pairs of transducers. The advanced signal processing techniques used in the LEFM 880 greatly extend the operating range of the flow meter in applications with solids, aeration, or ray bending. The LEFM 880 uses a cross crosscorrelation method to improve signal-to-noise ratios. noise The system also uses an Automatic Gain Control (AC) and Zero-Crossing detection to provide the highest Crossing possible timing accuracy. The LEFM 880 internal processing is optimized to allow measurements up to 50 Hz. This provides dramatically improved signal and data processing. Up to 8 path capability 240 x 128 graphic display LEFMLink programming interface Watchdog timer Freescale/Alterra processors for high reliability Dual oscillators for timing assurance Advanced signal processing with AGC and cross-correlation cross 50 Hz flow measurement capability LEFM 880 flow meters utilize deviation and median filters to eliminate data errors and provide smooth outputs. These techniques offer improved performance and faster response to actual flow changes compared to less sophisticated averaging and rate-of-change of change velocity or flow filters. The LEFM 880 utilizes dual oscillators to maintain long term accuracy and reliability. This provides a better assurance of timing accuracy than a simple software softwaredriven self test. Digital and analog outputs igital Modbus communications for high speed and reliability USB Memory Dual pipe capability

MEASUREMENT SYSTEMS For more information contact: CALDON Ultrasonics Technology Center Tel: 724.273.9300 | Toll Free: 1.800.654.3760 | www.c-a-m.com/hydro | [email protected] These specifications are subject to change without notice. Check with the factory to verify if they are currently in effect. MEASUREMENT SYSTEMS Houston | 281.582.9500 north i 1.800.654.3760 asia i +603.5569.0501 Europe, i +44.1243.826741 HEAD OFFICE AMERICA _ PACIFIC , l/=> MIDDLE EAST | [email protected] I [email protected] & AFRICA I [email protected] USA • CANADA • UK • CHINA • U A E * ALGERIA • MALAYSIA • INDIA • KENYA...