IST-2292.PM01.01
Istruzione / User’s Manual / Manuel d’utilisation
Pag.4/10
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Tel. +39 02 26922890 - Fax +39 02 2133734
Led Giallo acceso:
la calibrazione è fallita. In questo caso, dopo 8 secondi si riavvia automaticamente e dopo il
preriscaldo, ripetere la procedura di “
Calibrazione
” senza reinserire il “
Codice
”. Se la condizione persiste anche dopo
la sostituzione della cartuccia sarà necessario inviare il rilevatore al fornitore per la riparazione.
“VERIFICA”(
Non serve Codice
)
:
questa funzione, serve per controllare la corretta risposta del rilevatore al Gas e
può essere effettuata sia dopo la “
Calibrazione
” sia dopo l’installazione, ma va eseguita soprattutto durante le manu-
tenzioni periodiche, in quanto è l’unico metodo per controllare l’effettivo funzionamento dell’apparato.
La Verifica può essere eseguita utilizzando miscela
Gas Metano 20%LIE (0,88%v/v) in aria (20,9% O
2
circa)
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
indicato in
Tabella 3-
Colonna 6
”
.
[
ovvero che l’uscita in mA aumenti fino a circa il valore indicato nella
Colonna 7
(±0,2mA) e
la centrale, cui è collegato il Trasmettitore, indichi circa il valore in %LIE (± 2) indicato in
Colonna 8
].
Se il risultato è diverso, è op-
portuno effettuare la “
Calibrazione
”. Terminata la “
Verifica
”, chiudere la bombola, togliere il TC011. Considerare che
l’uscita, tornerà progressivamente 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 per Idrogeno, utilizzando una bombola con H
2
a 0,8%v/v (=20%LIE) in
Aria, l’uscita in mA dovrà essere circa 7,2 mA (ovvero circa 72 mV su “
TESTmA
”).
EN
DESCRIPTION
The TS292P series is a three-wire 4÷20mA transmitter 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 laboratories, manufacturing industries and environments to be protected from possible leakage of gas.
The instruments comprise of a thermoplastic case in which the electronic circuit and the terminals are mounted.
The enclosure has 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 out-
put is connectable to a remote Gas Central Unit as listed in
Table 1
.
On the front panel there are two F1 e F2 key,
using for the 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
TS292PM (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%v/v
(%volume
).
TS292PG (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%v/v
for Propane and 1.4%v/v for Butane. Standard calibration to LPG is carried out for Butane gas.
TS292PI (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%v/v
(%volume
).
TS292PB (Unleaded Gasoline/Petrol)
is calibrated to detect Gasoline vapours heavier than air and highly flam-
mable. Its density as to air about 2.8 and its LEL (
Lower Explosive Limit
) is about 1.2%v/v
(%volume
).
TS292PX
can be calibrated to detect the gases listed in
Table 3.
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.
Preheating
: when powered, the sensor needs a time of preliminary heating of about 60 seconds. During this peri-
od the yellow LED “
FAULT
” flashes. After this period, the yellow LED light off, the green LED “
ON
” illuminates to in-
dicate normal functioning. After this period the unit is able to detect gas even if it attains the optimum stability con-
ditions after about 4 hours continual functioning.
Normal operation
: the green LED “ON” should be light on.
The Red LED
(
ALARM
) illuminates when the Gas concentration attains 20%LEL (
only if it be activate by Dip-Switch
).
Faults
:
the instrument signal different kind of failures, as listed below. The Yellow LED illuminates and the "
S
" out-
put falls down to 0mA.
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
in
Table 3
(
2
nd
column)
. 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 on page 1
) these checks are made connecting and discon-
necting 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 (
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
