Smart Prepaid RF Water Meter can record and electronically display the water consumption, and can also automatically control the water consumption according to the agreement, and automatically complete the water fee calculation of the stepped water price. The data transmission and transaction settlement are carried out through the card. It can realize the change from the staff's door-to-door meter reading fee to the user's own payment to the business office.
Installation method of prepaid water meter:
① When installing a water meter on a newly laid pipeline, the sundries in the pipeline must be cleaned and installed.
② The maximum operating water temperature and maximum operating water pressure at the installation site must meet the requirements of the water meter.
③ Water meters installed outdoors should be protected from exposure to sunlight and freezing. Generally, protective boxes should be installed. At the same time, they should be installed in places where they are protected against sediment, underground water, and insects.
④ The installation location of the water meter should avoid corrosion of corrosive gas, and there should be anti-theft facilities.
⑤ The prepaid water meter installed near the boiler should be installed with a check valve after the meter to prevent the hot water from flowing back.
Main technical data
(Ⅰ) Technical specifications
Item | Unit | Details | ||
Nominal diameter | mm | 15 | 20 | 25 |
Q3/Q1 | R80/R100 | |||
Overload flow(Q4) | m³/h | 3.125 | 5 | 7.875 |
Nominal flow(Q3) | m³/h | 2.5 | 4 | 6.3 |
Transitional flow(Q2) | m³/h | 0.05 | 0.08 | 0.13 |
Minimum flow(Q1) | m³/h | 0.031 | 0.05 | 0.08 |
Accuracy class | Class 2 | |||
Maximum indication | m³ | 99999 | ||
Temperature class | T30,T90 | |||
Pressure class | MAP 10/MAP16 | |||
Pressure loss class | ΔP63 | |||
Flow prefile sensitivity class | U10/D5 | |||
environmental class | Class B | |||
Electromagnetic environment class | E1 | |||
Static current | uA | <10 | ||
(Ⅱ) Relative error
· Maximum permissible error between Q1 and Q2(excluded) is ±5% in flow low area.
· When the water temperature is not higher than 30℃, maximum permissible error between Q2 and Q4(included) is ±2% in flow high area.
· When the water temperature is higher than 30℃, maximum permissible error between Q2 and Q4(included) is ±3% in flow high area.
(Ⅲ) Working temperature: cold water (0.1~30)℃
(IV) Operating ambient temperature: (5~55)℃
(V) Storage environmental temperature: (-5~55)℃
Fault handling instructions
Item | Fault display | Fault explanation | Elimination methods |
1 | Under voltage | Low battery | Contact the manufacturer |
2 | Flow | Flow sensor signal failure | |
3 | Valve open/close | Valve sticking rusting or scaling | |
4 | Can not read the card | Write card error take the wrong card | Go to the water supply department to test the card |
Outline dimensional drawing
Nominal Diameter | Length L | Length L1 | Width B | Height H1 | Height H2 | Connecting Thread | |
mm | d | D | |||||
15 | 258 | 165 | 90 | 112 | 184 | R1/2 | G3/4B |
20 | 299 | 195 | 90 | 112 | 184 | R3/4 | G1B |
25 | 345 | 225 | 90 | 114 | 186 | R1 | G11/4B |
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