IST-2293.EO01.01/C
Istruzione / User’s Manual / Manuel d’utilisation
Pag.5/9
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Tel: 02/26 92 28 90 Fax: 02/21 33 734
Yellow and green Led activates (
0 mA output signal
):
this happens when the “
Cartridge Sensor
” is not working.
First try to perform the procedure of “
Calibration in Air
” as described in the section
“
Test and Calibration > Calibration in
Air
”
then disconnect and connect the unit, finally try to replace a new
“
Cartridge Sensor
”. If the condition is not
change, please replace the unit and/or send it back to the supplier to repair.
All Led activates
only if reed Led be activate by Dip-Switch no.1 set to ON
(
>20 mA output signal
):
this happens when the
“
Cartridge Sensor
” is not working or gas concentration is higher than F.S. (30%vol. O
2
) If there are not any gas leaks
and the condition is not change, please replace the unit and/or send it back to the supplier to repair.
INSTALLATION
The detector must be accurately installed and testing according to the national dispositions in force on the safety of
the plants and installation of electric devices in areas with danger of explosion.
Mounting
: The
fig. 2
shows the instrument size. The unit must be positioned vertically with the sensor downwards.
TS203EO positioning:
It should be fixed at 1.60 m from the floor (the
O
2
gas is lighter as air).
Electrical Connection
(
see fig.2
)
: the maximum distance to install each detector from the Gas Central Unit is show
in the
Table 1
. Normally use a tree wire shielded cable.
The terminals (
+ - S
), are polarized plug-in type, it is necessary to extract them to make the connection.
Note: Dip-Switch should be set with instrument powered off. Dip-Switch 1 settled ON activates ALARM red
Led indication (see Table 2).
Important:
Once installation is completed,
power up the unit, wait about 30 to 60 minutes and then to adjust the
sensor to the environment, only if it is necessary,
carry out the
”
Calibration in Air
”
(see ‘
Test and Calibration
).
COMPATIBILITY WITH OTHER CENTRAL UNITS: In case of a central unit other then Tecnocontrol,
please
verify the max load resistor as shown in
fig. 4
.
The max load resistor is 50 ohm with 12Vdc power supply, while is
400 ohm with 24Vdc power supply.
We suggest using 24Vdc power supply.
WARNING
Average life
: In clean air and in normal working condition the
sensor's life is
about 2 years.
After this period the
yellow Led “
FAULT
” flashes every 4 seconds, is necessary replacing the “
Cartridge Sensor
”.
Periodical testing
: we advise to carry out working tests every 6 or 12 months. as explained in chapter “
Tests and
Calibration
”.
Note:
the detector is not able to detect Oxygen gas occurring outside the room where it is installed.
Sensor operating limits:
the electrochemical cell, in any case, should not be exposed to temperatures lower than
-40°C or higher than 60 °C. The electrochemical cell can be damaged, if it is exposed to concentrations over con-
centration of 30 % O
2
. If this condition occurs, we suggest replacing the “
Cartridge Sensor
”.
Safety:
Oxygen sensors contain a small quantity potassium acetate solution which is corrosive. Normally this ma-
terial 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, car-
bon 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 increase mA output 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 era-
sed. 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 detector. After having inserted the "
Code Test
", all Led are switched off. Then Led will switch on in sequence,
from the yellow up to the red. At the end all the Led will remain lighted for around 5 seconds, then the detector re-
turns 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 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 clean 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 yel-
low 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.
