ConnectMe Tunstall Vi+ Installation and Programming Manual
36
Backup battery monitoring
The unit battery low feature provides the following alerts:
1.
Under mains failure condition
– home unit alerts monitoring centre when
the home unit battery reaches 1/3 of its capacity and therefore has
approximately 13 hours remaining back up time. This alert is in addition to the
existing alerts provided during a mains failure situation.(Code JB)
2.
Battery terminal voltage too high or too low
– this alert is provided at any
time when the battery voltage goes above or below set limits indicating a unit
battery fault or failure.(Code J8)
If mains failure alerts are received close to the ‘System Battery Low’ and ‘Battery or
Unit
Failure’ messages then it can be assumed that the message relates to the
battery backup time remaining during a power failure. Therefore this alerts the
monitoring centre that there is only 13 hours battery time remaining until the unit will
shut down unless the mains power is restored.
Alerts received when no mains failure alerts have been received relate to a battery
fault or failure. Such alerts should be dealt with promptly by replacing the unit’s back
up battery. These can be ordered from Tunstall using part number D3316093A.
This supports battery management procedures and in particular avoids the need to
carry out the 6 monthly unit battery tests as previously recommended and will also
raise alerts to any battery failures at the earliest opportunity.
