56 Detection line threshold-adjustment
Conventional fire detection control panel
Chapter 10
Detection line threshold-adjustment
By means of the guided threshold settings procedure, it is possible to configure the intervention thresholds
of the detection lines and I/O lines configured as "INPUT GAS 4-20mA".
From panel: <key>, Programming, Progr. Zone, select a zone, Detection line or I/O line, Modify
levels, Use wizard, Ok
The control panel will ask you to perform a series of operations on the line you are working on (open the
line then press Ok, Balance the line then press Ok, etc.). During each phase, the display will show the
terminal value reading (expressed in Volts), and a graphic bar that indicates the reading.
Once the requested operations have been completed, the display will show the value in volts and the point
on the graphic bar where the various thresholds are set. Each threshold can be adjusted by means of the
UP and DOWN scroll keys. After setting the required value, press OK to confirm the entry.
This threshold-setting procedure will allow you to define the current limit (for each line) that discriminates
standby status from an alarm, etc.
In this way, the control panel can be set up to work with all types of conventional detectors and existent
detection lines with unknown resistance and balancing values. etc.
From panel: <key>, Programming, Progr. Zone, select a zone, Detection line or I/O line, Modify
levels, Import from, Ok
The control panel will allow you to import the thresholds of a previously configured zone.
Attention:
If you change the line type of a zone, the thresholds will be restored automatically to default
values.
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