метр беспроводной газа

wireless gas meterFUNCTIONAL CHARACTERISTIC♦Accurately record the value showedon the meter screen. No lamp-house direct reading sensoror dithering defense two pulse counter are used in meter system. The reading dates are debugged ahead in wireless transfer circuit. Epistasy dates are checked time after time in order to confirm accuracy; ♦Save historical datas; ♦Wireless communication, recorded data can be completed without entrance house; ♦Wide-range control; ♦Low-power design, great continuity; ♦Great reliability and stability;♦Build-in antenna; ♦Very easy operation.QUALIFICATION nominal flow rate: 1.6m3/h, 2.5m3/h, 4 m3/h max operating pressure: 10KPa measuring accuracy: B grade pressure loss: <250pa reading accuracy: 100%center distance: 130 mmscrew thread: M30x2Center Frequency: 470MHzoperating electric current dormancy status: <3.8uA receiving signal:<12mA radioactive signal:<50mA average operating electric current:<25uA wireless communication speed rate:<100kbit/Scenter frequency: 470MhzCommunication Speed: 20 KhzReception sensitivity: -104dBcommunication distance: distance between antenna and earth is 2 m, unobstructed communication distance is 1000 mBattery capacity and operating life lithium battery capacity: 7500mAh / each lithium battery life span: 10years lithium batteryl operating life: more than 8years standard:GB/T6968-1997(diaphragm type gas meter) JJD-577-2005 (diaphragm type gas meter certification) INSTALMENT OPERATING REQUIREMENT♦ Keep the gas meter to standing status in transportation and installation. Don’t converse and invert. Don’t dash and shock; ♦ The gas meter should be install at drafty environment. Don’t install at bathroom, bedroom and combustible region; ♦ Take care of inlet and outlet direction. Inlet had been signed “inlet” at the side of meter shell. The distance to fire source should beyond 1.5m; ♦ It must be test carefully when installation finished. It can be used if no air leak but no direct-fired test; ♦ Keep away from damp and mordant environment in order to avoid gas meter corrosion when gas meter entrance warehouse, storage and transportation.APPLICATION:Natural gas, LPG and coal gas can be measured by the meter. Wireless meter system is made of basic meter, meter reading, wireless communication module, handy-meter and meter main station system.