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Datasheet of LEM-1 Electric Module for Prepaid Water Meter


1. Basic Function

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




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