IST-2138.EO01.01
Istruzione / User’s Manual / Manuel d’utilisation
Pag.6/11
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Tel: 02/26 92 28 90 Fax: 02/21 33 734
Note:
the detector is not able to detect Oxygen gas outside the room where it is installed, neither inside walls nor
under the floor.
Sensor operating limits:
the electro-chemical cell, in any case, should not be exposed to temperatures lower than
-40° or higher than 60°C. The electrochemical cell should not be exposed to an over-range concentration of 30 %
O
2
. If this condition occurs, please replace the “
Cartridge Sensor
”.
Safety:
Oxygen sensors contain a small quantity potassium acetate solution which is corrosive. Normally this mate-
rial would only leak out as a result of either mechanical damage or an incorrect instrument use beyond the limits of
its operational functioning. These sensors also contain small amounts of lead, lead oxide, platinum, silver, carbon
and antimony. If the user comes into contact with the oxygen sensor contents the affected area should be washed
with a copious supply of water.
Cross sensitivity to other gases:
The electrochemical cell employed has a good resistance towards products
such as sprays, detergents, ammonia, glues and paints.
However, in case of products containing substances in
great quantity, these could interfere with the Sensor and cause false alarms.
We recommend ventilating the room
when products like these are used. Volatile organic solvents in great quantity cause false alarms, and then the cell
needs one or more hours in clean air to recover the normal sensitivity conditions.
TEST and CALIBRATION
PAY ATTENTION
: This procedure has to be made with extreme attention and by authorized and trained people;
because starting this procedure it will start both Outputs (relays) causing the activation of connected alarm devices.
Operation Check, Calibration in Air and Fine mA ADJ Output:
are different code protected functions. To access
these functions is necessary to insert the relevant “
Code
" through the keys F1s and F2. To have the key pressure
recognized, hold pressing it for around a second (
until the green Led doesn't switch off for a moment
). Then the next key can
be pressed. In case of error all it takes is waiting around 10 seconds and the sequence is automatically erased. The
Calibration Check
is a function code free.
Calibration Kit, Sample Gas Bottles
(
for Calibration Check
) please, only using a mixture
16% volume Oxygen (O
2
) in nitrogen
You can use either the disposable cylinder, with adjust valve or
the high pressure ones with reduction gear. Is also
necessary to use
the calibration kit
Tecnocontrol mod. TC011
.
“INSTRUMENT OPERATION CHECK” (
Check Code
: F2, F2, F1, F1)
:
this function allows to effect a functional test
of the equipment. After having put the system in safety and inserted the "
Code Test
", all Led are switched off and all
the relays are deactivated. Then they will switch on in sequence, the Led, from the yellow up to the 3
rd
red. To the
lighting of the various Led it corresponds the activation of the relevant relays (
relay "FAULT" with the yellow Led, relay
"ALARM1" with the 1° red Led, relay "ALARM2" with the 2° red Led, relay "ALARM3" with the 3° red Led
). At the end all the Led will
remain lighted for around 5 seconds, then the central returns at the conditions of normal operation. It is advisable to
perform this operation every 12 months according to the use.
Note
: this function is not working if the 1° and/or the 2° and/or the 3° red Led have already turned on.
“CALIBRATION IN AIR” (
Calibration Code
: F2, F2, F2, F1, F2, F1)
:
this function allows completely recalibrate the
sensor at 20.9%volume in air. This procedure when it is launched will automatically until the end.
Warning
:
to guarantee that no errors of elaboration happen, the possibility exists that during the Calibration the yellow
Led switch off every 8 seconds, in this case interrupt the procedure, switch off and switch on the instrument and repeat
the Calibration. If condition persists it will be necessary to send the detector to the supplier for the reparation.
Important note:
During Calibration routine the mA output indicates 0mA
.
The “Calibration in Air” can be done in clean air only (
environment without the presence of toxic or other polluting gas
). With
the keys perform the “
Calibration
Code
". Wait until the yellow and green Led switch on fix and the 1
st
red Led starts to
flash (the 3
th
Led red
switch on to indicate the calibration working). Wait while the 1
st
red Led switched off. At this
point we can have two possibilities:
Yellow and green Led illuminates:
the calibration routine is correct.
Wait 8 seconds, until the instrument automat-
ically restores the normal working conditions
.
(
See “
Operational Description > Preheating
”
).
Yellow Led illuminates:
the routine has failed. In this case, wait 8 seconds, until the instrument automatically re-
peat
Preheating
, then repeat the “
Calibration
”
routine without inserting again the code. If condition still persists after
the replacement of the “
Cartridge
”, please send the detector back to the manufacturer for reparation.
Important
:
If the environment is much polluted and there is doubt that the concentration of oxygen is 20.9%v/v, you
can use an air cylinder with
20.9%v/v of O
2
or use a gas balloon (
our code
PA020
) filled with fresh air. In this case,
before executing the "
Calibrating Code
", insert the TC011 on the sensor holder, adjust the flow of air, so that the flow
meter indicates approximately 0.3 l/min (
see Fig.3
).
"
Fine mA ADJ Output”
(
ADJ Code: F2, F1, F1, F2
): This feature allows you to adjust the mA output of ± 0.32 mA cor-
responding to ± 0.5% O
2
, but it should be used only at new installation and if, after the "
Calibration in Air
" (clean air),
the control unit, connected to SE138EO, indicates a value other than 20.9% O
2
.
After entering the "
ADJ
Code
", the yellow Led starts to flash, the output value increases pressing the F1 key, and
decreases pressing F2. Hold down the two F1 and F2 keys simultaneously for 2 seconds to confirm and then check
that yellow Led remains off. This procedure cannot be used, if the yellow Led is already on, or if the O
2
concentra-
tion is less than 20.6% or higher to 21.2%. If this is the case: "
Calibration in Air
" routine must be done first.
“CALIBRATION CHECK” (
no Code required
)
:
although the sensor operation is guaranteed if it is regularly per-
formed successfully "
Calibrating in Air
", it is possible to simulate the response of the detector using sample gas cylin-
