超声波流量计.pdf

Product Datasheet DAN-GFM-DS-0221-rev1104 November 2004 Gas Ultrasonic Flow Meters ® Daniel SeniorSonic™ Gas Flow Meter with Mark III™ Electronics Product Datasheet DAN-GFM-DS-0221-rev1104 November 2004 ® Daniel SeniorSonic™ Gas Flow Meter with Mark III™ Electronics The Daniel® SeniorSonic™ Gas Flow Meter with Mark SPECIFICATIONS: III™ Electronics is designed for natural gas custody transfer accuracy where high and long-term, reliable Performance–Meter performance is critical. This advanced 4-path meter helps Flow calibrated accuracy is ± 0.1% of reading relative customers reduce lost and unaccounted natural gas with to lab exceptional accuracy and linearity throughout the flow Absolute accuracy is 0.3% including lab uncertainty range. Repeatability is ± 0.2% of reading for Qt to Qmax The SeniorSonic™ Flow Meter measures transit times of All meter sizes with 60° angled transducers are rated to ultrasonic pulses passing through the gas on four parallel 100 fps with over-range of up to 125 fps planes. Daniel carefully chose transducer locations to optimize measurement accuracy. Each of the four paths Performance–Electronics has two ultrasonic transducers acting alternately as Communication protocol: Modbus RTU/ASCII TCP/IP transmitter and receiver, providing accurate measurement Two serial RS-232/485 ports and Ethernet capability* of both upstream and downstream transit times. Serial communication speed: Up to 115 Kbps The difference in transit times of the downstream-directed Ethernet* spe