10
2.3 OPTICAL PORT
There is an optical port (fig. 2) for connection to computer, which also used for testing. The adapter
“Opticalport-USB” connected to the USB-port of computer carries out connection between the optical port
and computer.
“Vega LoRaWAN Configurator” application allows reading and changing the meters parameters. See
detailed application description in a part 3.
The opto-emitter of the optical port is used as a technological optical pulse output for checking the
meter during production. During operation, the meter is verified by the comparison method.
2.4 INTERNAL CLOCK
Time on internal clock may set automatically when the device connects to the “Vega LoRaWAN
Configurator” application and may corrected via LoRaWAN network.
“IoT Vega TimeCorrector” application
carries out
an autocorrecting procedure via LoRaWAN
network. The device sends time correction request once a week.
2.5 ELECTRONIC MAGNETIC SEAL
The meter has a Hall sensor for fixing of the external magnetic field and it is located under faceplate
of the device (fig.2). That function named as an electronic magnetic seal.
From the 1
st
second of external magnetic field influence, which strong enough, the meter LED
indicator displays warning symbol “
b
” at the high order digit place (first index) but readings still displaying.
If the external magnetic field influence continues more than 5 minutes, then device locks LED
indicator and send emergency message with lock flag. Herewith, the LED indicator displays warning symbol
“
b
” but readings not displaying. Only the dispatcher via the LoRaWAN network can unblock a LED indicator
using a special command.
There are device controlling functions, which activated by a magnet getting on external magnetic
field reception area in table 2.
Table 2
Time of external magnetic
field influence
Event
Comment
Less than 2 seconds
Optical port activation for 20
seconds
After 20 seconds, the optical port is
deactivated if it is not in use
From 15 to 20 seconds
Emergency communication
session, switching from
“Storage” mode
While communication session the LED
indicator displays
warning symbol “
p
” at
the high order digit place but readings
still displaying
5 minutes and more
Lock of the LED indicator
The LED indicator displays warning
symbol “
b
” but readings not displaying
2.6 LORAWAN
2.6.1 CONNECTION TO THE NETWORK
Meter supports two activation methods in the LoRaWAN network:
•
ABP (Activation By Personalization)
– meter sends data to the LoRaWAN network according to pre-
configured schedule (every 12 hours by default)
.
