11
WIRELESS COMMUNICATIONS – GSM VERSIONS ONLY
Access via GSM
Commissioning test for signal strength
This provides a means of carrying out a radio
signal test for selecting the optimum location for
the antenna. The system can be tested in its final
commissioned location and state (e.g. manhole
cover closed and any local comms equipment
disconnected from the meter, etc).
Menu 12 controls the GSM features.
Go to Menu 12 and select the Signal Test Wait
Time [>354]. Enter here the time in seconds that
the system will wait before starting the signal test.
A count down starts from the selected Wait time to
zero. This count down is shown on the LCD
Display. At this point the installation should be
closed up into its commissioned state. When the
count reaches zero, a radio signal strength
measurement is taken and the result is shown on
the Display for 30 seconds (long enough to open
the door or meter cover to inspect the result).
The highest signal strength is represented by a
value of 31; the poorest strength is a value
below 5.
SIM Numbers
Data-enabled SIMs sometimes have both a Voice
Telephone Number and a Data Telephone
Number. In such cases, use the Voice Number for
Remote Access via SMS Text; use the Data
Number for Remote Dial Up operation e.g. using
LogMaster.
GSM WakeUp Control
Battery-Powered Meters
To conserve battery power, the GSM radio module
is normally powered down. To operate remote
communications (SMS Requests, Auto Report or
Remote Dial Up), the GSM radio module can be
woken either by going to menu 12 and requesting
a Manual Wakeup [>358=1] - which forces the
module to wake up for the WakeUp Duration
[>352] - or by setting a programmable WakeUp
schedule as shown in the following diagram. The
WakeUp Schedule [>353] can be programmed for
wake ups every 12 hours, 1 day or Always Off.
The Base Time [>351] sets the time of day for the
wake ups. The Base day [>347] sets the day of the
week for the Auto Reports.
Mains Powered Meters
When the meter is mains powered, the GSM radio
module is continuously powered and is able to
handle remote communications (SMS Requests,
Auto Report or Remote Dial Up). If mains power is
interrupted and the meter is powered from the
back up battery, the GSM module will not operate.
Note
. On mains powered GSM units the
module is automatically rebooted at
midday every day. This process takes
approx 1 minute and it is therefore
recommended that the Base Time
should be set to avoid the period around
midday.
WakeUp Duration
The power supply to the transmitter may have
been ordered as one of the following types :
Mains with Battery Backup
Battery only (dual internal cells)
External Battery Pack with Backup
For Mains powered units with battery backup, the
WakeUp Duration does not apply as the GSM
module is either continuously powered (whilst
there is mains power present) or not powered
(whilst on backup battery).
For Battery only units, powered either by 2 internal
cells or by an external battery pack, the WakeUp
Duration (>352) has a range of 3 to 23 minutes.
Schedule [>353]
ON
Time
Base Time [>351]
Base Day [>347]
ON
OFF
On Time [>352]
