IST-2293.EA01.01/C
Istruzione / User’s Manual / Manuel d’utilisation
Pag.8/15
TECNOCONTROL S.r.l. - Via Miglioli, 47 20090 SEGRATE (MI) ITALY
Tel: 02/26 92 28 90 Fax: 02/21 33 734
tridge connections and compatibility (
see on page 1
) these checks are made switching off and on the device.
If the
condition does not change, it will be necessary to replace the unit and/or send it back to the supplier to repair.
Yellow and green Led activates (
0 mA output signal
):
this happens when the “
Cartridge
” is not working. First try to
perform the procedure of “
ZERO
” as described in the section
“
Test and Calibration
> Zero adjust
”
then disconnect and
connect the unit, finally try to replace a new
“
Cartridge
”. 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
” is not working or gas concentration is higher than F.S. If there are not any gas leaks and the condition is
not change, it will be necessary to 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.
TS293EA and TS293EA-H positioning:
should be fixed at 30÷50 cm from the ceiling (
NH
3
gas is lighter than air
).
TS293EC-S and TS293EC-H positioning:
should be fixed at 1.60 m from the floor (
CO
gas is a little lighter than air).
TS293ES positioning:
should be fixed at 30÷50 cm from the floor (
SO
2
gas is heavy as air)
TS293EH positioning:
should be fixed at 30-50 cm from the floor (
H
2
S
gas is heavier than air).
TS293EHCN positioning:
should be fixed at 1.60 m from the floor for the protection of persons or over the likely
point of emission. (
HCN
gas is a little lighter than air
).
TS293EN positioning:
should be fixed at 1.60 m from the floor
(
NO
gas is heavy as air).
TS293EN2 positioning:
should be fixed at
30÷50
cm from the floor
(
NO
2
gas is heavier 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
”
Zero Adjust
”
(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. Tests, Zero Adjust and Calibration
with sample gas bottle, as explained in the next chapter “
Tests and Calibration
”.
Note:
the detector is not able to detect gas leaks occurring outside the room where it is installed, neither inside
walls or under the floor.
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 the
limit specified in the table, depending on the model. If this condition occurs, please replace the “
Cartridge Sensor
”.
TS293EA - TS293EA-H
TS293EC-S - TS293EC-H
TS293ES
TS293EH
TS293EHCN
TS293EN
TS293EN2
500 ppm NH
3
>1000 ppm CO
150 ppm SO
2
500 ppm H
2
S
100 ppm EHN
1000 ppm NO
150 ppm NO
2
Safety:
electrochemical Cell contains a small quantity of acid. It is possible that either a very strong mechanical
action or an incorrect instrument use beyond the limits of its operational functioning could provoke a liquid leak out
of the sensor. Should this event occurs, please avoid touching the come out liquid. Should a contact with either the
skin or eyes occur, wash immediately and abundantly with water.
Cross sensitivity to other gases:
this detector is designed to detect gas leaks at a very low concentration. The
electrochemical cells employed have a good resistance towards products such as sprays, detergents, 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. Alcohols, Hydro-
gen and 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, Zero Adjust, and Calibration
:
are different code protected functions. To access these func-
tions 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.
