Copyright © 2000 Tunstall Group Ltd.
Lifeline 4000 Advanced User Guide (B)
55
Temperature monitoring
Two different temperature settings can be monitored using a Lifeline
4000. For example, you could have one temperature sensor
monitoring the temperature in a greenhouse, while another monitors
the temperature in the kitchen or hall. Alternatively, you could set up
two temperature sensors in the hall, one that triggered when the
temperature was too high and the other that triggered when the
temperature was too low. In this way a control centre would know
whether the temperature was too high or too low, rather than whether
the temperature is just
out of the acceptable range.
Another configuration is to have a temperature sensor that
monitors temperature while the resident is at home, and another
that monitors temperature when the resident is away (i.e. when the
Away
feature is turned on). As you might expect, the acceptable temperature when the resident is
at home would be higher than the lowest temperature allowed when the resident is away.
Multiple sensors.
Although Lifeline can monitor two different temperature settings, this does
not mean that only two temperature sensors can be registered with a Lifeline 4000. For example,
you could register ten temperature sensors as
Extension Radio Triggers
(see the section on
Triggers
earlier in this chapter) and distribute them in the rooms of a large house. If any of these sensors
detected a temperature out of range it would send a radio trigger to Lifeline, and the Lifeline
4000 would raise an alarm.
Setting temperature limits.
A Lifeline 4000 cannot be used to set the temperature limits for
temperature monitoring. The temperature at which an alarm will be triggered is set in the
temperature sensor itself. Once a limit has been exceeded (so that the temperature is either too
high or too low) the temperature sensor will send a radio trigger message to the Lifeline 4000
which will then raise an alarm.
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1
0
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1
Parameter 132 allows you to turn temperature monitoring on and off for the two temperature
settings,
A
and
B
. For each temperature setting,
A
and
B
, you can enable monitoring by entering
a
1
, or disable monitoring by entering a
0
, for both the
Home
and
Away
states. In the example
above,
Temperature A
is set for both
Home
and
Away
.
Temperature B
, however, is only set to be
turned on when the resident is away. Typically, monitors configured to act as Temperature B sensors
would be set to trigger when the temperature drops several degrees below normal room
temperature. Consequently, if this setting is enabled when the resident is away, and has turned off
the central heating, it would probably raise a false alarm.
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