产品名称（Product Name）：Vertical smart card water meter

产品介绍（Product Introduction）：This water meter is a multi-rate water meter. It integrates prepayment, tiered water price billing, fault detection and other functions. It has the characteristics of clear reading, accurate measurement, convenient management and control, beautiful appearance, safety and hygiene.

功能（Function）：

2.1 Alarm function: When the remaining amount reaches the set alarm amount, the water meter will automatically close the valve, cut off the water source, and remind the user to buy water; at this time, you can use the "user card" to swipe the card area as shown in the figure to open the water meter valve.

2.2 Overdraft function: When the remaining amount reaches the set overdraft amount, the water meter will automatically close the valve and cut off the water source. At this time, only by recharging the "user card" to buy water can the water meter valve be opened.

2.3 Protection function: When the water meter encounters magnetic interference, the water meter will automatically close the valve; at the same time, the water meter will record the interference information.

2.4 Battery undervoltage reminder function: When the battery power is low, the valve will automatically close and cut off the water source to remind the user to contact the management department to replace the battery; at the same time, the remaining water volume and the actual water consumption record data will be locked. At this time, use the "user card" to swipe the card area as shown in the figure to open the valve. After the above operation, the water meter can still be used. After three days, the water meter will close the valve and cannot be opened again. After replacing the new battery, the water meter will automatically open the valve, and the original water use information data will be retained.

2.5 Power-off valve closing function: When the water meter is powered off, the water meter will automatically close the valve to prevent accidental or man-made power outages; after powering on again, use the "user card" to swipe the card area as shown in the figure to open the valve. (The power-off valve closing function is optional).

主要技术参数（Main technical parameters）：

3.1 Maximum allowable working pressure: equal to 1MPa.

3.2 Maximum allowable working temperature: 30℃ for cold water meter and 90℃ for hot water meter.

3.3 Metering characteristics: The accuracy level is 2. In the water temperature range of 0.1℃～30℃, the maximum allowable error of the water meter is ±2% in the high zone (Q2≤Q≤Q4) and ±5% in the low zone (Q1≤Q＜Q2). When the water temperature exceeds 30℃, the maximum allowable error of the water meter in the high zone is ±3%, and the low zone is still ±5%.

主要机械参数（Main mechanical parameters）：