JFRL series RF card circulating hot water meter

The working principle of the RF card circulation heat meter is that when there is no water, the inlet water in the pipeline is not equal to the return water when there is water, and the difference is the water consumption. The LCD display on the main meter directly displays the usage, purchase, and remaining amount. To reduce measurement errors, we used the flow sensor of the heat meter as the base meter and adopted a dynamic error correction method to make the measurement more accurate. The water meter adopts an electric valve, and the pressure loss when the valve is opened is very small. The pressure loss under the nominal flow of the water meter is not greater than 0.1Mpa. The fault content is displayed as battery undervoltage "undervoltage" sign, flow sensor fault "flow" sign; When the valve fails to open, the current status of the valve is displayed as "valve open fault". When the valve is closed, the "valve close fault" sign is displayed. When there is no fault, the "valve" sign is displayed when the valve is open; When the valve is closed, the "valve closed" flag is displayed. Please recharge status. When the remaining amount on the table is less than the alarm parameter value, the "please recharge" flag is displayed