Functionality - Emerson Rosemount 648 Quick Start Manual

February 2019
1.0

Functionality

The intended use of this WDM special is to provide a solution for real-time
monitoring of applications in underground water level and pressure
management of an embankment dam to determine the stability of its structure.
An Impress strain gauge pressure sensor is connected directly to the WDM
which excites the sensor and measures the output. The WDM converts the
measured voltage to a pressure reading in PSI, meters of water or other units
and wirelessly transmits the reading as well. This solution eliminates the need
for solar panels and associated costly materials making it an inexpensive and
easy solution.
1.1 Wireless considerations
Power up sequence
The Rosemount WDM Special and all other wireless devices should be installed
only after the Wireless Gateway ("Gateway") has been installed and is
functioning properly. Wireless devices should also be powered up in order of
proximity from the Gateway, beginning with the closest. This will result in a
simpler and faster network installation. Enable active advertising on the
Gateway to ensure new devices join the network faster. For more information,
see the Gateway
Antenna position
The special is offered with both the external antenna (WK1) and the extended
range antenna (WM1). The antenna should be positioned vertically, either
straight up or straight down, and it should be approximately 3 ft. (1 m) from any
large structure, building, or conductive surface to allow for clear
communication to other devices.
Figure 1. Antenna Position
Reference Manual.
Quick Start Guide
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