Wireless AMR

Features: collecting, metering, wireless data communication, soft clock, ultra low power consumption, power control, broken line sensing, low cost and multifunction integrated in one module. The module measures the impulse of gas meter，water meter, quantity of heat meter and so on. It transmits the metering data and some related conditions to the concentrator randomly or timely. ======================================================================= Function introduction: *The single module support single meter/double reed switch (HAC-UT ). *Accurate impulse filtering, collecting circuit and metering algorithm, higher exactitude. *Reliable, stable and long distance data transmission. *The communication distance is longer owning to the automatic intermediate function. *Ultra low power consumption, the average is≤30µA. *The function of power sensing will give out a alarm signal when the power of battery is nearly depletion. *If the circuit is broken naturally or from spite, the broken line sensing will sound the alarm. ======================================================================= SPECIFICATIONS: Ⅰ Power Supply: HAC-UT wireless transmit module uses DC power supply with voltage of +2.2~3.6V. Ⅱ Sleeping Current: The definition of the state that module await the opportune moment is: the power supply of RF is shut off and the MCU works in the mode of saving power (The main block stop vibrating, but the 32.768KHZ clock is vibrating from beginning to end). Each I/O port keeps their proper conditions. Sleeping current is 15 µA. Ⅲ Soft Clock Count State: MCU is waked up by the time clock every 62.5ms and it count the soft clock. The awaken time lasts 31.25µs. MCU works while the power supply of RF is still shut off during the awaken time. The working current of MCU is ≤5mA. The average consumptive current during the soft clock's count state is: 5000µA*1.25µs/62500µs=2.5µA Ⅳ RF Transmitting State: The RF circuit transmits one time every 4 hours or when it has measured 0.1 ton of water. Each transmission lasts 400ms and we calculate the transmitting current according to 100mA (actually it is 80mA). Suppose the circuit transmits once in 3 hours on average, the current in transmitting condition is shown below: 100000µA*0.4s/(4*3600s)=2.8µA Ⅴ Total Power Consumption: 15+2.5+2.8=20.3µA The manual gives out the total power consumption of this type:≤30µA We guarantee the overall consumption of the module under normal production is ≤27µA.