RF-Karte Großkaliber Intelligente Wasserzähler

Intelligent Water Meter The large caliber radio frequency card water meter uses non-touch radio frequency IC card 4442 to transmit data information, the function and features as followings: 1. Auto sampling and measuring 2. Prepayment 3.Alarm Function 4.Close valve and cutting off water supply 5.Check Information function 6.Transcription function 7.Withdrawal function 8.Transfer function 9.Measuring function when valve is abnormal 10. Communicating on Time 11. Magnetic Interference Resisting Function: When there is strong magnetic interference from outside which affects normal sampling, the controller can close the valve automatically. 12. Voltage-lacking indicating and closing the valve Function: Main parameters for the base meter: a)The sampling of double reed switch is: it will send a pulse every 1 m³ (or 10m³,100m³). b)Error limitation: i.At low zone is ≤ ±5% from minimum flow rate to transitional flow rate exclusive boundary; ii.At low zone is ≤ ±2% from minimum flow rate to transitional flow rate; iii.At high zone is ≤ ±2% from transitional flow rate to maximum flow rate. c)The working pressure: ≤ 1.0MPa d)The water temperature: 0 40 Main parameters of the valve: 1.Nominal pressure: 1.0MPA 2.Pressure-resistance intensity: 2.0MPA1min 3.Smallest pressure offset: 0.05MPA 4.Life : 30,000 times for DN40-DN100, 10000times for DN150-DN300 5.Responding Time: <10S(Valve open and closure time), electric machinery movement < 5S 6.Insulation resistance: ≥ 20MΩ(15-35,moisture <85%) 7.Sealing Property: No Leakage 8.Working Voltage: 3V±0.5V 9.Working Current:≤ 50mA