“ZY-DN*0, ZY-DN*5 no reflection plate ultrasonic heat meter” main technique parameters 1. Structure ·Flow sensor: straight through type inwall reflection ultrasonic flow sensor with no reflection plate stand and beam pieces ·Temperature sensor: PT***0 temperature sensor pair ·Optical interface, M-bus interface for data communication 2. Flow ·Rated flow: 1.5~3.5m³/h ·Rated flow and min flow proportion is **0. 3. Temperature and temperature difference ·Temperature measurement range: 4~*5℃ ·Temperature difference: 3~*0℃ ·Thermal coefficient: Along with inlet and outlet water 4. Connection mode ·Installation position: inlet or outlet as instructed(optional) ·Connection type: threaded connection ·Max working pressure: 1.6MPa 5. Service condition ·Environment condition: Class A 6. Display ·Display: LCD, 8 digits, special symbols ·Dimension: kWh, MJ ·Resolution (1)Heat: 1kWh or 1MJ (2)Cumulative flow: 0.*1m³ (3)Temperature: 0.1℃ (4)Temperature difference: 0.1K 7. Data storage ·Data storage: ROM ·Store at least *8 months’data 8. Intensity and tightness ·No damage and leakage when the medium temperature is *0℃ less than the max working temperature and the pressure is 1.6 times greater than the max working pressure. 9. Accuracy ·Metering accuracy is Class 2 *0. Pressure loss ·Pressure loss＜*0kPa (Industrial standard: Max allowed pressure loss is *5kPa ) *1. Power supply ·Built-in lithium battery(3.6VDC/3.8Ah), external remote data acquisition system power supply is possible ·Battery life: ≥*0 years(Industrial standard: built-in battery life＞5*1years ) ·Working current: *0~*0μA *2. Safety requirements ·When the power supply is stoped, the record data of heat, cumulative flow and corresponding time before power off. Can reform normal metering after power is restored ·The metering characters will not be affected when the magnetic interference strength is not greater than **0KA/m ·The enclosure protection grade is IP*4 ·According to relevant national standard, in the environment condition of dry heat, cooling, steady damp-heat, cyclic damp-heat and cryogenic storage, when the analog parameters are input, the heat meter can work normally. ·According to relevant national standard, in the environment condition of line-voltage variation, electrical fast transient, electromagnetic field, electric surge, power frequency magnetic field and electrostatic discharge, the heat meter can work normally.
