Indication Of "Not Idle" Sensors; Ir Volumetric Sensor Functioning (T520 E T521); Battery Flat Indications - MetaSystem VESTHA THS501 Manuel D'utilisation

HomeAlarm MetaSystem
2.10. Indications of "not idle" sensors
EN
If, with the system disabled, one of the sensors is in the NOT IDLE condition, the unit signals it on the display
giving the number of the sensor (e.g. magnetic contact that is opened). "SENSORE (N. 03) NOT IDLE" will
appear on the display, or the name assigned to the sensor.
2.11. IR volumetric sensor functioning (T520 and T521)
While the sensors are working normally, at each detection they send the alarm signal to the unit several times
(to increase communication reliability) causing the red indicator light inside the lens to turn on each time.
Once detected and transmitted an alarm, it turns off temporarily to limit the consumption of its battery. In
fact, the sensor adapts automatically to the conditions of the room to control, varying its idle time from time
to time; if the room is crowded for instance, the sensor lengthens the time that elapses between one alarm
transmission and the next up to 4 minutes. Vice versa, when the room is less crowded the time elapsing
between two transmissions is a few seconds less.
ATTENTION: THE VOLUMETRIC SENSORS HAVE A BATTERY FLAT SIGNAL. IF, AFTER EACH DETECTION,
THE RED INDICATOR LIGHT INSIDE THE SENSOR LENS FLASHES FOR ABOUT ONE MINUTE THE
BATTERY NEEDS CHANGING. THE SENSOR ALSO TRANSMITS THE FLAT BATTERY INFO TO THE ALARM
UNIT WHICH, IN TURN, SIGNALS THE ANOMALY ON THE DISPLAY.

2.12. Battery flat indications

Nearly all the VESTHA system peripheral units have batteries.
The peripheral units that are not connected to the mains are designed to have an autonomy of more than 2
years under normal working conditions.
The peripheral units connected to the mains have an internal battery which kicks in whenever there are power
cuts.
When the charge level of a sensor/actuator battery is not optimum, the sensor/actuator transmits this info
to the unit. This transmission occurs before battery performance is unacceptable.
When the unit is disabled, the information received is shown on the display.
Devices that only have an internal battery, from the moment the flat battery indication is sent they still have
enough autonomy until the battery is replaced. When the flat battery indication is displayed it is advisable to
replace it as quickly as possible because some devices could give false alarms or not detect intrusions if the
batteries' charge level is too low.
In security systems it is normally advisable to replace the batteries within the period indicated in the user
manual of the device without waiting for the battery flat messages; this guarantees total system performance.
To not risk a flat battery when you are away for any length of time it is advisable to keep to a scheduled
replacement programme.
Check the expiry date on the batteries or on their pack. Replace the batteries at the latest on the date specified
even if no indication is given that the battery is flat. This will ensure that the system is kept at maximum
reliability.
Do not use batteries that are not new that show signs of leaks and/or mechanical damage. Use alkaline
batteries for the volumetric sensors.
ATTENTION: DUE TO A NORMAL AUTOMATIC DISCHARGE OF THE RECHARGEABLE BATTERIES USED
IN SELF-POWERED PRODUCTS (UNIT, SIRENS, ETC.) IT COULD HAPPEN THAT WHEN INSTALLING YOU
FIND THE BATTERY IS FLAT: KEEP IT POWERED WITH MAINS VOLTAGE FOR AT LEAST 24 HOURS
BEFORE RUNNING ALL THE TESTS.
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