IST-2293.PX04.01/B
Istruzione / User’s Manual / Manuel d’utilisation
Pag.4/11
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Tel: 02/26 92 28 90 Fax: 02/21 33 734
“VERIFICA”(
Non serve Codice
)
:
serve per controllare, utilizzando la miscela di gas sopra indicata, la corretta rispo-
sta al gas e può essere eseguita dopo la “
Calibrazione
” o dopo l’installazione, ma va eseguita soprattutto durante le
manutenzioni periodiche, in quanto è l’unico metodo per controllare l’effettivo funzionamento del rilevatore.
Infilare il TC011 sul portasensore, regolare il riduttore della Bombola in modo che il flussometro indichi circa 0,3
l/min (
vedi Fig.3
).
Controllare, che con i puntali del volmetro sui Test-Point “
TESTmA
”, (
vedi Fig.2
) si raggiunga il valore
in
mV
(± 0,2%)
indicato in
Colonna 8-Tabelle 3 o 4
”
.
[
ovvero che l’uscita in mA aumenti fino al valore indicato nella
Colonna 9
(±0,2mA)
e la centrale, cui è collegato il rilevatore, indichi il valore in %LIE (± 2) indicato in
Colonna 10
].
Se il valore fosse diverso, eseguire la
“
Calibrazione
”. Terminata la “
Verifica
”, chiudere la bombola e togliere il TC011. L’uscita, tornerà poi a 4 mA.
Se si usa la specifica miscela Gas/Aria del gas da rilevare, il segnale d’uscita dovrà corrispondere al gas utilizzato
.
(Esempio
se si deve verificare un rilevatore tarato per Idrogeno, utilizzando una bombola con H
2
a 0,8%
volume
(=20%LIE) in Aria, l’uscita in mA dovrà essere circa 7,2 mA (ovvero circa 72 mV su “
TESTmA
”).
DESCRIPTION
The
TS293P
series is a is a gas detector able to detect combustible gases by employing a catalytic Pellistor sensor
calibrated up to 100% LEL to different gases and find their best application in centralized alarm systems for laborato-
ries, manufacturing industries and environments to be protected from possible leakage of gas.
The instruments is flameproof certified and comprise of an enclosure in which the electronic circuit and the terminals
are mounted and a downward facing cylindrical sensor housing with inside a replaceable “
Cartridge Sensor
”.
The instrument has a 4÷20mA linear output (
S
) with
100%LEL
(
Lower Explosive Limit
) F.S. of detected gas. This output
is connectable to a remote Gas Central Unit as listed in
Table 1
.
On the Printed Circuit Board, F1 and F2 key using for Test
and Calibration routine protected by a code and 3 LED shows the working conditions:
Red LED "ALARM":
20% LEL alarm indication.
Green LED "ON":
normal working condition
Yellow LED "FAULT":
the sensor should be faulty, disconnected, out of scale or expired.
NOTES ON THE AVAILABLE MODELS
The above Gas value is on compliance with EN61779-1.
TS293PE
is calibrated to detect
Acetylene (C
2
H
2
).
It is a colourless gas, lighter than air, highly inflammable. With the air easily form explosive mixtures. Its density as to
air is 0.9 and its LEL (
Lower Explosive Limit
) is 2.3%volume (
see Table 3
).
TS293PS
is calibrated to detect
Styrene
(
C
8
H
8
).
It is a yellowish transparent oily liquid, which evaporates at ambient temperature, the vapours are heavier than air,
toxic and flammable. Its density as to air about 3.6 and its LEL (
Lower Explosive Limit
) is about 1.1%volume (
see Table
4
). Its main use is as monomer for the production of many plastics.
TS293PX-H
can be calibrated to detect gases in
Table 3
and is used in polluted environments.
OPERATIONAL DESCRIPTION
The catalytic Pellistor sensor is practically insensitive to humidity and temperature variations. The calibration is car-
ried out for the specific gas to be detected. Anyway, it can contemporaneously detect any other flammable gas that
should be present in the same environment.
Note
that the LEDs are not visible when the enclosure is closed
Preheating
: when powered, the sensor needs a time of preliminary heating of about 60 seconds. During this period
the yellow LED “
FAULT
” flashes. After this period, the yellow LED light off, the green LED “
ON
” illuminates to indicate
normal functioning. After this period the unit is able to detect gas even if it attains the optimum stability conditions af-
ter about 4 hours continual functioning.
Normal operation
: the green LED “
ON
” should be light on.
Alarm
:
when Gas concentration attains 20% LEL the red LED “
ALARM
”
illuminates (
only if it be activate by Dip-Switch
).
Faults
:
the Yellow LED illuminates and the "
S
" output falls down to 0mA. (The different faults are listed below).
Yellow LED illuminates each 4 seconds (
with green LED activate
):
this happens when the “
Cartridge Sensor
” has
overcome its period of life (about 5 years) and its correct operation is not longer guaranteed. The detector keeps on
operating normally but it is necessary to replace, as soon as possible, the “
Cartridge Sensor
” with a new one. The type to
be required is listed
on page 1
. The replacement procedure is described in the attached manual.
Yellow LED activate, green LED off (
0mA output signal
):
this signal different kind of faults.
1)
The Dip Switch set
up is wrong, please verify (
see Table 2
).
2)
The “
Cartridge Sensor
” is not working, please replace with new one.
3)
If a
new
“
Cartridge Sensor
” is installed or it is not correctly connected or a not compatible one is mounted. Please check
the cartridge connections and compatibility these checks are made connecting and disconnecting the device.
If the
condition does not change, please replace the unit and/or send it back to the supplier to repair.
Yellow and green LED activates (
0mA output signal
):
this happens when the “
Cartridge Sensor
” 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 Sensor
”. If the condition is not change, please replace the
unit and/or send it back to the supplier to repair.
All LED activates (
>24mA output signal
):
this happens when the “
Cartridge Sensor
” is not working or gas concentra-
tion is out of scale (higher than 100% LEL) If there are not any gas leaks and the condition is not change, please re-
place the unit and/or send it back to the supplier to repair.
GB
