User's Manual

1 Product Description
This section provides a general description of the Integrated E-Coder R900 MIU register (subsequently
referred to Integrated E-Coder R900 MIU). The Integrated E-Coder R900 MIU by Neptune is an
integrated register that contains both the E-Coder and R900 technologies in one register that collects
meter reading data. It then transmits the data for collection by the meter reader. A walk-by handheld,
mobile or fixed network unit receives the data and stores it to be downloaded into the utility billing system
for processing.
The Integrated E-Coder R900 MIU is easily installed and operates within an RF band which does not
require an operating license. The Integrated E-Coder R900 MIU meets FCC regulations part 15.247,
allowing higher output power and greater range. The Integrated E-Coder R900 MIU uses frequency-
hopping spread spectrum technology to avoid RF interference and enhance security. The transmitted
data is updated at 15 minute intervals and is transmitted every 14 seconds. A unique 10-digit MIU ID is
included in the transmission of data. This allows the meter to be read by a walk-by handheld, mobile or
fixed network data collection units. The Integrated E-Coder R900 MIU is designed to offer advantages to
utility organizations of all sizes:
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Increases meter reading accuracy
Eliminates “hard to read” meters
Protects utility liability by increasing meter reader safety
Requires no external wiring or programming
Provides enhanced 8-digit AMR meter reading
Provides proactive customer service benefits (leak, tamper and backflow detection)
Figure 1 Integrated E-Coder R900 MIU Picture
Integrated E-Coder R900 MIU Programming
The Integrated E-Coder R900 MIU is NOT field-programmable. At the factory, each of the following items
is programmed into the MIU:
Serial number – Each MIU is given a unique serial number/identification number.
Time between MIU transmissions – The time between MIU transmissions is set for
approximately 14 seconds. Custom time is not available.
RF Protocol Error Detection
The RF protocol is comprised of a header, data packet, and an error detection mechanism that reduces
the erroneous data.
RF Frequency Control Algorithm
The MIU’s frequency-hopping, spread-spectrum has a sequence of at least 50 different channels for
transmitting data. Associated with the 50 channels are 50 frequencies that can be pre-selected in a
pseudo random manner. These 50 frequencies are coded into the software.
RF Transmission Period and Randomness
The random period generation uses the same random seed created for the channel definition to generate
the transmission randomness. The randomness algorithm is defined so that no two consecutive
transmissions from two MIUs will interfere with one another.