METER EM50 Series - 6.7 Download Collected Data

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EM50
The two-way modes generally consume the most power. The Em50R is designed to work for
several months in the two-way modes.
6.2.1 TWOWAY RADIO MODES
Use the Radio settings section of ECH20 Utility to choose one of the following radio modes
that support two-way communication.
Two-Way 24-hour: The radio logger listens for connection attempts every 45 s for 24 h
a day. This mode uses a substantial amount of batter power. Expect batteries to last for
approximately 3 months.
Two-Way 6:00-18:00: The radio logger listens for connection attempts every 45 s between
6 AM and 6 PM. The logger does not use the radio between 6 PM and 6 AM to conserve
battery power, by not listening for connection attempts during the night. Expect batteries to
last for approximately 6 months in this mode.
Transmit + two-way and CD Transmit + two-way: These modes combine the two-way
Radio modes and the Transmit Radio modes. You could use these modes while configuring
and testing your radio network. You should not leave your radio logger in these modes
because they use the most battery power of all the radio modes. Expect batteries to last for
approximately 3 months in this mode.
NOTE: Using Transmit + two-way and CD Transmit + two-way radio modes with the wake interval set to 1 or 2 can
cause the batteries of your logger to drain very rapidly.
6.2.2 TWOWAY BEST PRACTICES
Two-way modes is most useful when you have a small number (one, two, or three) of remote
radio loggers you wish to contact. If you have three or more loggers installed within radio
range of each other, consider using one of the Transmit modes. The two-way modes also
allow you to mount an Rm-1 in your vehicle and interact with the remote logger while in
radiorange.
See Section4.2.1 for establishing a two-way connection with a remote radio logger.
6.3 RADIO SETTINGS
For two radio devices to communicate they must share the same radio settings. An
Rm-1 radio modem can only connect to a remote radio logger with the same radio settings. A
DataStation only receives data from loggers with the same radio settings as the DataStation.
Set the Radio Channel to the same value for all the devices on the same network. Set the
Radio Subchannel to the same value for all the devices on the statement network.