IST-2282.KM01.01
Istruzione / User’s Manual / Manuel d’utilisation
Pag.4/9
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Tel. +39 02 26922890 - Fax +39 02 2133734
“VERIFICA” (
Codice
: F2, F1, F2, F1)
:
questa funzione, serve per controllare la corretta risposta del rilevatore al
Gas e può essere eseguita sia dopo la “
Calibrazione
” sia dopo l’installazione, ma va eseguita soprattutto durante le
manutenzioni periodiche, perché è l’unico metodo per controllare l’effettivo funzionamento.
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
(
0,88%v/v Aria
)
, in modo che il flussometro indichi circa
0,3 l/min (
vedi Fig.3
). Controllare, con i puntali del voltmetro sui Test-Point, (
vedi Fig.2
) che raggiunga il 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 è diverso, è opportuno eseguire la “
Calibrazione
”. Terminata la “
Verifica
”, chiudere la bombola, togliere
il TC011 e
premere il tasto
F2
sulla targa per ripristinare le condizioni di funzionamento normale
. Considera-
re che l’uscita, tornerà progressivamente a 4 mA.
EN
DESCRIPTION
The
TS282K
series is a three-wire 4÷20mA transmitter 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, manufacturing industries, etc.
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
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
.
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
TS282KM (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
).
TS282KG (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.
TS282KI (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
).
TS282KB (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
).
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.
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 no 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 described in
Table 3
. The replacement procedure is described in the attached manual.
Yellow LED activates, 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 disconnect-
ing 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 dis-
connect and connect the unit, finally try to replace a new
“Cartridge Sensor
”. If the condition is not change, it will be
necessary to replace the unit and/or send it back to the supplier to repair.
All LED activate (>
24mA output signal
):
this happens when the “
Cartridge Sensor
” is not working or gas concentra-
tion is out of scale (higher than 25% LIE) 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.
