Datasheet of LEM-1 Electric Module for Prepaid Water Meter

1. Basic Function

u Measurement function
u Charging function
u Overdraw function
u Friendly features (support grace period) 
u Real-time clock with temperature compensation
u Magnetic attack detection function
u Low-power alarm function
u Insufcient Water Warning
u Emergency Water (Overdraft)
u Anti-Stock (Purchase Limitation)
u Low Battery Detection & Warning
u Non-switch of during holidays, weekend & off-duty time
u Social Amount (Monthly Free Consumption Management)

2. Performance index

Content	Unit	Metric
Working Temperature	℃	-10~60
Storage Temperature	℃	-20~70
Quiescent Dissipation	uA	≤ 23
Clock Precision	normal atmospheric temperature	5ppm @1s or 0.5s @1day
	Full temperature area	12ppm @1s or 1.2s @1day
Minimum Pulse Equivalent	M3/pulse	0.1
LCD Display (in amount)	L E	9999 999 .999
LCD Display (volume)	M3	9999 999 .9
Service Voltage	V	DC 3.6
Output Power	dBm	26.5