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PERI InSite Construction -
Data Acquisition System
Instructions for Installation and Use - Technical Cabinet with Main Unit and Nodes – Preliminary Draft –
Main Unit model L-11
The Main Unit acts as a gateway to the Internet in effect transferring the data collected by the
paired Nodes via the mobile phone network to the Web Portal where it can be accessed by
the user. The Main Unit also acts as a buffer storage for data not yet transferred. If the
communication between the Main Unit and the Internet for some reason is interrupted, the
Main Unit will buffer the collected data until a connection can be re-established.
Normally the Main Unit is powered through the Technical Cabinets built in AC-DC power supply
through the USB cable emerging from the Charging Bay. If the mains supply for some reason
is interrupted an internal back-up battery takes over and provides power for up to 24 hours of
normal operation. How long the back-up battery can uphold normal operation depends on data
load and communication settings.
Figure 3 depicts the Main Unit with the Rocker Switch
[A]
and the LED indicator lamps
[B]
highlighted. The main unit also has a built-in buzzer capable of playing simple tones to indicate
ongoing activity.
Figure 3 - Main Unit model L-11 with the Rocker Switch and the LED indicator lamps highlighted
3.7.2.1 On-Off Rocker Switch
Turning the Main Unit on
When the rocker switch
[A]
is pushed to the
“I”
position the unit is turned on and initiates the
start-up procedure. The buzzer on the Main Unit plays a short series of notes to indicate it has
been turned on while the green LED lamp
[B]
indicates a first connection to the Web Portal is
being initialized.
“
♩
♫
♬
♩
”
Turning the main unit off
When the rocker switch
[A]
is pushed to the
“0”
position the unit initiates the close-down
sequence. A last connection attempt is carried out in order to convey the information that it has
been turned off to the Web Portal. The buzzer plays a two-note signal to indicate that it will
turn OFF after trying to connect a last time.
“
♩
♪
”