Part 1. Purpose; Part 2. Operation - F&F LE-01MW User Manual

domestic and industrial automation

Part 1. Purpose

The LE-01MR v2 is an electronic, legalized (MID declaration) AC electricity meter designed for direct
current measurement in 2-wire system.
The meter provides 4-quadrant energy and power measurement as well as monitoring of many
additional network parameters such as voltage, current, active power, reactive power, apparent power,
frequency, power factor. The meter has additional, resettable active and reactive energy meters. Thanks
to the built-in real-time clock with battery backup, it is possible to measure energy consumption by
user-set four tariff zones. The tariff-switching program can be made date-dependent (e.g. a different
cycle in the summer months, a different one in the winter months) and exceptions can still be made to
this in the form of user-defined holidays with separate tariff distribution. The LE01MW v.2 meter is also
equipped with RS485 communication interface with Modbus RTU protocol support for remote meter
reading and configuration. The touch button located on the front panel of the meter allows you to select
the displayed parameter and change the meter settings. The backlit LCD display makes it easy to read
the measured values. The meter is also equipped with auxiliary energy (active and reactive)
consumption meters, operating independently from the main meter, which can be reset by the user.

Part 2. Operation

Under the influence of the flowing current and applied voltage, the meter measures precisely the
energy consumption and many additional electrical parameters (power, voltage, current, frequency...).
The meter records in non-volatile memory the total (*) consumption of active and reactive energy,
imported and exported active and reactive energy, and active and reactive energy by tariff zone. The
other parameters indicated by the meter are temporary and show the current values of the measured
parameters that are not written to non-volatile memory.
(*) The method of calculating the total energy consumption is set in the meter configuration. By default,
total energy is the sum of energy imported and exported.
LE-01MW v.2 – User manual v.1.0.1 4