Alarm relay
The alarm relay
is activated when the
concentration
%
L
.
E
.
L
.
of the sensed area
exceeds the alarm level
(10%
or
20%)
.
The
relay
returns
to normal operation when the
gas concentration returns to normal levels
.
If the
latch function has been selected
via
the
S
3
switch
,
then
the relay remains
activated even if the gas levels return to
normal
.
When
we
connect the device to a fire
detection panel, the device needs to have an
alarm lock. This
happens
that the user can
understand which device has given an alarm.
Fault Relay
The fault relay has one contact that is closed
(
N
.
C
.)
when the system is powered and there
are no malfunctions
.
This contact opens when
there is no power or there is a malfunction
.
Green LED
(
operation indicator
)
The green LED indicates the presence of the
power supply and special operation states as
described in table 2.
Red
LED
(
alarm indicator
)
The red LED is activated when the gas
concentration of
%
L
.
E
.
L
.
in the covered area
exceeds the selected alarm level
(10%
or
20%).
The LED
is
deactivated when the gas
concentration returns to normal levels
.
If
the
latching function
has been selected via
the S3 micro switch then the LED remains
active (
blinks every second
)
even if the gas
concentration drops to a safe level.
Yellow
LED
(
Fault indicator
)
T h e y e l l o w L E D
i n d i c a t e s a s y s t e m
malfunction or fault and also some special
states as shown in table 3.
System Calibration
WARNING
!!!
The calibration procedure of the
detector must be done by qualified personnel
that have previously read the user manual.
-
The special calibration function is not
available to the user if there are faults in the
system.
-For the calibration procedure using a
reference gas, the OL-11 calibration kit is
required.
(
figure
6
).
-For the calibration procedure using a
reference gas, a mixture
20% or 50% L.E.L.
with oxygen and nitrogen is used
. The
explosive gas catalytic sensors do not operate
without oxygen.
Page
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7
Yellow LED Operation
Permanently activated
Problem with the system settings
.
Repeat the clear air and reference gas calibration
procedure.
Probable cause:
-The power supply of the system is out of operation limits
(
in combination with the green led operation
).
Check the power supply of the system.
-gas sensor malfunction
.
Replace sensor.
-Central processor malfunction
.
Service required.
Explanation
TABLE 3
Intermittent brief
illumination once a minute
The current concentration of gas has exceeded the
high detection limit of the device that is
50%
L
.
E
.
L
.
Normal operation is restored
automatically when
the gas concentration drops to within the measuring
limits of the unit.
Intermittent operation
every second
Green LED Operation
Permanently activated
Intermittent operation
every second
The system is powered
Explanation
TABLE 2
The system is in the initialize pre-heat phase
of the sensor
.
This phase last for 60 seconds
Intermittent brief
illumination once a minute
The supply of the system is out of limits
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500
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