13
3 – REDi Functions
3.1 – Downloading Wireless Data Loggers
The REDi uses a short wave radio signal to communicate with Wireless Mini data
loggers (MI-IN-D-2-LR8, MI-OE-D-2-LR8, MI-IN-D-LR9 and MI-OE-D-LR9).
Radio communication depends on communication distance, interference by other
objects and other radio waves. Metal and water (rain) especially can disturb the
signal. Further, both the orientation of the REDi and the logger antenna strongly
influence the quality of the communication. There should be at least 0.5m of clear
space around the antenna. To improve communication, get closer to the logger,
remove obstacles in the way or metal in the surrounding area, and hold the REDi
at different angles for each attempt.
The first screen, referred to as the main menu screen, is the first visible menu
(which follows the System Info, see 4.7) after initiating your REDi device and
allows for two download options ‘Read New’ and Read All’.
3.1.1 - Read New
The ‘Read New’ option allows you to locate and download loggers that have not
previously been downloaded by a specific REDi unit. The highlight bar
automatically defaults to the first option (Read new) on the main menu.
If you select ‘Read New’ and press ‘OK’, the next screen displayed is the ‘search’
screen. REDi communicates with the loggers in range and checks their serial
numbers against all records already in the REDi memory. Connection will only be
established with loggers that cannot be found in the REDi memory already. The
device then displays the ‘Connected to loggers’ screen (see figure 3.1). Once the
REDi has downloaded all data of new loggers, you are given the option to either
view the data just downloaded with ‘View recent’, or view all of the data stored in
the REDi memory (see 3.2.1 and 3.2.2) using ‘View all’. ‘Exit’ will take you back
to the main menu.