Neptune Technology L900 MIU Pit, Руководство по установке и обслуживанию

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L900 MIU Pit and Wall Installation and Maintenance Guide 1
Chapter 1: Product Description
This chapter provides a general description of the L900™ meter interface unit
(subsequently referred to as L900 MIU).
The L900 MIU by Neptune is a compact electronic device that collects meter
reading data from an encoder register. It then transmits the data for collection by
the meter reader. A walk-by handheld unit (HHU), mobile unit, R900
®
Gateway
collector, or LoRa
®
(Long Range) collector receives the data and stores it to be
downloaded into the utility billing system for processing.
The L900 MIU is easily installed and operates within a radio frequency (RF)
bandwidth which does not require an operating license. Because the L900 MIU can
be mounted as far as 500 feet from the encoder register, optimum broadcast signal
strength is obtainable, ensuring a high percentage of accurate, one-pass readings.
Figure 1 – L900 MIU - Wall Figure 2 – L900 MIU - Pit
The L900 MIU meets FCC regulations Part 15.247, allowing higher output power
and greater range. The L900 MIU uses frequency-hopping, spread-spectrum
technology to avoid RF interference and enhanced security. The L900 MIU reads
the encoder registers at 15-minute intervals and transmits a mobile message that
includes the meter reading data and the unique nine-digit L900 MIU ID every 20
seconds. This allows the meter to be read by an HHU or mobile data collection
unit. The L900 MIU also transmits a high power fixed network message every
seven and one-half minutes on an interleaved basis to an R900 Gateway.
In addition to the mobile message that is transmitted every 20 seconds and the
fixed network message that is transmitted every seven and one-half minutes, the
L900 MIU is capable of supporting fixed network using a LoRa network.