Eltek Delta OP User Manual page 29

Due to environmental pollution, (e.g. dust, cigarette smoke, etc.) the monitors'
response may be gradually altered, producing higher analogue values.
In order to reduce the occurrence of false alarms, '(/7$ 23 incorporates the
facility of individually adjusting the pre-alarm and alarm limits of the monitors.
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For security reasons, adjusting alarm limits is considered as access level 3, and
requires a password. Only authorised personnel may have access.
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Alarm limits must be adjusted within the ranges below; otherwise, the values
will not be accepted by the system:
PRE-ALARM LIMIT should normally be 20 analogue units (±10 %) above the
adjusted normal level, and should be between 30 and 55 a.u.
ALARM LIMIT should normally be 30 analogue units (±10 %) above the
adjusted normal level, and should be between 45 and 65.
For information about the normal level, turn to page 27.
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The adjusted values will be stored in the system's memory (EEPROM) and will
be UHPHPEHUHG, even if the control panel is powered-down.
In order to give you useful information about the number and type of detectors
connected to a loop, '(/7$ 23 incorporates following menu option:
On the keypad, press the following keys:
For each loop, you will be able to access the address of the last detector and
total number of detectors of each type — smoke, heat detectors, manual call
points, etc.
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For information about how to access system information, take a look at, '7KH
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