The series of water meters is used to measure the total quantity of hot potable water meter, consumed in household or a resident unit, passing through the pipeline. Prepaid IC card smart water meter DN15-25 Features:1. Magnet Alarm system. Alarm ring first when strong magnet happen, then the valve will close. All that back to normal until the strong magnet disappear. 2. Function of prepadi card: First , the alarm will ring when the card with less moiney. Second, the stop valve will close when the card is out of money. Third , water meter will contiue to work when the payment is done. 3. Less power dissipation .Use professional MPU, design it as power dissipation , the static electric current ≤3 uA . DNmm152025 Q minM3/h0.03125 0.050.07875 QtM3/h0.05 0.080.126 QnM3/h2.5 46.3 QMaxM3/h3.125 5 7.75 Q3/Q180-100Accuracy class BPressure lossΔp63Sensitivity flow in sectionU10 /D5Temperature class T30( cold ), T90(hot)Enviroment class E1Electric current 15 uAWork votage 3.6vprotect class IP 68ERROR CURVE:a. at low Zone is ±5 %from Qmin to Qt( not contain boundary)b. at high zone is ±2 % from transitional flow(Qt)to maximum flow ( Qmax) Working Conditions : Water temperature≤30°c (cold )Water pressure ≤1.6 Mpa
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