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

Panasonic Eco Solutions Nordic AB
MEW01622 Rev: -
15.7
15.8
4452: This detector has no analog output.
4400: This detector has a smoke obscuration value output, a
temperature value output, actual area alarm algorithm output and a
CCF (see below) output to the c.i.e.
4401: This detector has a smoke obscuration value output, actual area
alarm algorithm output and a CCF (see below) output to the c.i.e.

Sensitivity compensation

In order to maintain a constant sensitivity regardless of the contami-
nation of the detector, a Contamination Compensation Factor (CCF)
is subtracted from the momentary smoke obscuration values before
evaluated in the alarm algorithms etc.
Compensation Factor (CCF) is calculated during a 36 hours period as
follows:
During 13 minutes, all the momentary smoke obscuration values are
saved and an average value is calculated. The CCF will be changed
directly if the average value is lower than the actual CCF, else no
change.
This is valid for 18 hours. Then the CCF will be changed also if the
average value is higher than the actual CCF. (It will normally be
higher because of contamination.)
After another 18 hours (i.e. in total 36 hours) the CCF will be changed
if the average value is lower or higher than the actual CCF and it will
be saved in the detector's EEPROM, i.e. it can be used e.g. after the
detector has been without power supply.
A new 18 + 18 = 36 hours period starts with an average value
th
calculation every 13 minute.
Max. Contamination Compensation Factor (CCF) is 2 %/m.
Service signal will then be activated and shown in the c.i.e.
The following is valid for the different type of detectors:
4452: This detector has sensitivity compensation. No Service signal.
4400: This detector has sensitivity compensation. Service signal.
4401: This detector has sensitivity compensation. Service signal.

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 the c.i.e.
The following is valid for the different type of detectors:
4452: This detector has no self diagnosis of internal devices.
4400: This detector has self diagnosis of internal devices. A fault
message will be shown in the c.i.e.
4401: This detector has self diagnosis of internal devices. A fault
message will be shown in the c.i.e.
127
EBL128 Planning Instructions V2.0.x
The Contamination
In some modes a separate fault