Prepaid Water Meter

Standard and main parameters
Technical standard: CJ/T133-2001 and GB/T778.1-1996
Water maters with the allowably maximal error which accords with the standard GB/T778.1B
Conditions of using: The allowably maximal temperature (MAT)40
The allowably maximal pressure(MAT)1MPa
Working Voltage: DC3V±0.6V 
Static current: 10uA
Working current: 50mA
Precision permitted: 0.1%
Endurable capability:  panel10000 times
Valve controled by electrcity: 1000 times
Loss of pressure: 0.1Mpa

FUNCTION OF USING

New meters insert card for the first time,please writer the card number and meter number into new meter to make sure one household can use 8 meters at the same time. 
Function of purch asing water 
Water meter will add the volume of water automatically and show the remaining as soon as the consumers insert IC cards purchased. 
Enquire the remaining 
Water meter will quikly show the remaing volume of water consumers can use as soon as one insorts the card. 
Enquiry card 
When water meter turns unregulatly.Management people can judge the system regular or not by "enquiry card". 
Function of renewing
When consumers lose the card,they can renew ti. 
Function of storing
The data stored in water meter can be kept for over 10 years in the situation of loss of electricity.