Analog Data Output; Sensitivity Compensation; Self Diagnosis Of Internal Devices - Panasonic EBL128 Planning Instructions

Panasonic Electric Works Nordic AB
MEW01090 Rev: 3
15.6
15.7
15.8

Analog data output

The smoke obscuration value (%/m) and the temperature (°C) can be
shown via EBL128. A new value is calculated every second but the
displayed smoke obscuration value is an average value for the last
four seconds.)
The following is valid for the different type of detectors:
4352: This detector has no analog output.
4350: This detector has no analog output.
4301: This detector has a smoke obscuration value output in the
NORMAL mode.
4300: This detector has a smoke obscuration value output and a
temperature value output in the NORMAL mode.

Sensitivity compensation

In order to maintain a constant sensitivity regardless of the contami-
nation of the detector, a Contamination Compensation Factor (CCF)
is calculated during a 36 hours period as follows:
During 13 minutes, all smoke obscuration values are saved and an
average value is calculated. The CCF will be changed if it is lower
than the actual CCF, else no change.
After 18 hours, the CCF will be changed if it is lower or higher than
the actual CCF. (It will normally be higher by contamination.)
After 18 hours more (totally 36 hours) the CCF will be changed if it is
lower or higher than the actual CCF and it will be saved in the
detector's EEPROM, so it can be used e.g. after the detector has been
without power supply. A new 36 hours period starts.
Max. compensation is 2 %/m. A service signal will then be activated
and shown in EBL128.
The following is valid for the different type of detectors:
4352: This detector has no sensitivity compensation.
4350: This detector has sensitivity compensation (but no service
signal output).
4301: This detector has not this sensitivity compensation in the
NORMAL mode. See chapter "Service signal", page 100 and "Analog
smoke detectors", page 81.
4300: This detector has not this sensitivity compensation in the
NORMAL mode. See chapter "Service signal", page 100 and "Analog
smoke detectors", page 81.

Self diagnosis of internal devices

The detectors perform an internal check of some vital functions and
components (e.g. the IR-LED).
message will be shown in EBL128.
The following is valid for the different type of detectors:
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EBL128 Planning Instructions V1.1.x
In some modes a separate fault