IST-2293.KM02.01/B
Istruzione / User’s Manual / Manuel d’utilisation
Pag.4/10
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Tel: 02/26 92 28 90 Fax: 02/21 33 734
Led giallo e verde accesi:
la calibrazione è corretta, dopo 8 secondi l’apparecchio si riavvia automaticamente in
funzionamento normale
(
vedi capitolo
FUNZIONAMENTO “ Preriscaldo
”
).
LED giallo acceso:
la calibrazione è fallita
dopo 8 secondi
l’apparecchio si riavvia
automaticamente e dopo il pre-
riscaldo, ripetere la “
Calibrazione
” senza reinserire il “
Codice
”. Se la condizione persiste anche dopo la sostituzione
della “
Cartuccia Sensore
”, inviare il rilevatore al fornitore per la riparazione.
“VERIFICA”(
Codice
: F2, F1, F2, F1)
:
serve per controllare, utilizzando la miscela di gas sopra indicata, la corretta
risposta al gas e può essere effettuata dopo la “
Calibrazione
” o dopo l’installazione, ma va eseguita soprattutto du-
rante le manutenzioni periodiche, in quanto è l’unico metodo per controllare l’effettivo funzionamento del rilevatore.
Con i tasti eseguire il “
Codice Verifica
”. Attendere che il LED giallo lampeggi (il verde rimane fisso). 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.
2si raggiunga un valore tra
184
e
216
mV.
[
ovvero che l’uscita in mA aumenti fino a circa 20 mA (±1,6) e la centrale, cui è collegato il rilevatore, indichi circa 20%LIE (±2)
]. Se il
valore fosse diverso, effettuare la “
Calibrazione
”. Terminata la “
Verifica
”, chiudere la bombola, togliere il TC011 e
premere il tasto F2 per ripristinare le condizioni di funzionamento normale
. L’uscita, tornerà poi a 4 mA.
GB
DESCRIPTION
The
TS293K
series is a gas detector able to detect combustible gases by employing a catalytic sensor calibrated
up to 20% LEL to different gases and find their best application in centralized alarm systems for car parks, manu-
facturing industries, etc.
The instruments is flameproof certified and comprise of an enclosure in which the electronic circuit and the termi-
nals 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
20%LIE
(
Lower Explosive Limit
) F.S. of detected gas. This output
is connectable to a remote Gas Central Unit as listed in
Table 1
.
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.
TS293KM (Methane CH
4
)
is calibrated to detect Methane, a gas lighter than air. Its density as to air is 0.55 and
its LEL (
Lower Explosive Limit
) is 4.4%volume.
TS293KG (GPL)
is calibrated to detect LPG, a gas heavier than air and consists of a mixture of 20-30% Propane
(C
3
H
8
) and 80-70% Butane (C
4
H
10
). Propane density as to air is 1.56 while Butane is 2.05. The LEL is 1.7% vol-
ume for Propane and 1.4% volume for Butane. Standard calibration to LPG is carried out for Butane gas.
TS293KI (Hydrogen H
2
)
is calibrated to detect Hydrogen, is a colourless, odourless, highly flammable gas and is
the lightest gas. Its density as to air is 0.07 and its LEL (
Lower Explosive Limit
) is 4% volume.
TS293KB (Unleaded Gasoline/Petrol)
is calibrated to detect Gasoline vapours heavier than air and highly
flammable. Its density as to air about 2.8 and its LEL (
Lower Explosive Limit
) is about 1.2% volume.
OPERATIONAL DESCRIPTION
The catalytic sensor is practically insensitive to humidity and temperature variations. The calibration is carried 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 pe-
riod 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 after 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 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
or in
Table 3
. 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 (
see Table 3
) 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 dis-
connect 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.