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15
Special fittings for the external antenna
The SMA connector that is present on the board usually requires a mating connector that is too large to fit
through the standard M12 cable glands that are supplied. We can provide a M12 to M16 gland adaptor that
allows fitting of this.
4
Using the unit and commissioning
4.1
How it works
Unit Asleep &
modem off
Wake up interval
–
powers the
sensors and takes
readings
Transmit interval
–
(or upon alarm) it
powers up
Unit Asleep &
modem off
The wakeup interval and transmit intervals operate independently. So it is possible to wake up and check the
sensors many times per day, but only transmit far less frequently.
Between each wake up interval and each transmit interval, the unit is effectively shut down to minimise the
power required. During this time, no communication (SMS or GPRS) will be possible to or from the unit. The
only exception to this is if you have configured polling mode, where the modem is continuously powered.
4.2
Using the menus and buttons
Up
Select the highlighted
option
Down
Go back a menu
level
Use the arrow buttons on the front of the display to navigate the menus. When wanting to leave a menu
selection, or return to the previous menu, you will need to press and hold the left button.
Multi-tasking
- The Metron2 can only do one thing at once, and there are times when it may be taking actions
in the background
. For example if you have Idle set to 1 in the ‘system configuration’ command then at power
up the unit will be setting up the gsm modem in order to make it pollable and you may find it is a little slow to
respond to any button presses.
4.2.1
Menu structure and functions