8
UPTIME
The third page of the LCD screen shows the uptimes. The uptimes can be used to monitor the amount of time the
liner has been curing. The uptime begins to run when the respective P# switch is pressed. The uptime resets to zero if
the respective P# switch is pressed again or if the Sentinel device is rebooted.
DETAILS
The fourth page of the LCD screen shows some useful pieces of information, such as the GSM network signal, the
serial number of the device, and the GSM number of the SIM card. Some network operators do not save the GSM
number to the SIM card. In this case, the GSM number will be shown as unknown.
You may write the number of the
SIM card to the quick help sticker located in the Sentinel case instead.
Line
Explanation
Signal: 0
-
10
GSM signal strenght
Serial:
Serial number
GSM#:
SIM card number
The Sentinel Guard device has two stages should an alarm occur. First,
the device will alert with sound and light sig-
nals for two minutes.
Second, if the cause of the alarm has not been fixed within the two minutes,
the device will
start sending alert messages.
The alert messages are sent via the GSM network. The alert messages will include the
cause of the alarm.
Along with sending alert messages, the device will call the number for a short amount of time.
If the cause of the alarm is fixed after the messages have been sent,
the Sentinel device will send messages noti-
fying that the alarm condition has been fixed.
ALARM
The final page of the LCD screen shows all the numbers in the SIM card memory. The numbers are shown as a list,
and if more than 4 numbers have been added, the page will scroll down for a new set of numbers.
GSM NUMBERS
The Sentinel Guard device works in the GSM network.
Therefore, it is imperative to have a GSM network signal.
The
signal level can be seen in the details page of the LCD screen by pressing the INFO button. Should the signal drop be-
low 2, the LCD screen will turn red and the signal level is being flashed in the details page of the LCD screen.
The antenna is located on the inner lid of the Sentinel device, to which it is attached with a black velcro tape.
If the
signal is too weak, you can try to either reposition the Sentinel device, or take out the antenna and move it around
to find a high signal spot.
GSM NETWORK SIGNAL & ANTENNA
The Sentinel Guard device can monitor either the pressure of a liner or a compressor.
To connect the pressure to
the Sentinel Guard, use a T –adapter.
Both measuring and monitoring the pressure is possible with the Sentinel Guard device. To measure the pressure,
simply connect a pressure connector to one of the pressure ports of the Sentinel Guard device. To monitor the pres-
sure, simply connect a pressure connector to one of the pressure ports and push down the respective P# switch.
Should the pressure drop below the low limit, or rise above the high limit, the device will begin the alarm procedu-
re.
The pressures can also be checked remotely by sending an SMS command
“
Pressure
”
to the device. The device will
then respond with a message
“
Pressure (kPa): #1 xx, #2 yy
”
where xx and yy are the pressures of the sensors #1 and
#2.
PRESSURE MONITORING
