Table des Matières
Publicité
IST-2293.PX03.01
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
Infilare il TC011 sul portasensore, regolare il riduttore della Bombola in modo che il flussometro indichi circa 0,3
Fig.3). Controllare, che con i puntali del volmetro sui Test-Point "TESTmA",
l/min
(vedi
Colonna 6 delle Tabelle 3, 4 o 5".
re in mV indicato in
(±0,2mA) e la centrale, cui è collegato il Trasmettitore, indichi circa il valore in %LIE (± 2) indicato in
so, è opportuno effettuare la "Calibrazione". Terminata la "Verifica", chiudere la bombola, togliere il TC011. Considera-
re 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
Aria, l'uscita in mA dovrà essere circa 7,2 mA (ovvero circa 72 mV su "TESTmA").
GB
DESCRIPTION
The TS293P 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 an certified enclosure 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
using for the Test and Calibration routine, protected by a code, and 3 Led shows the working conditions:
Red LED "ALARM":
Green LED "ON":
Yellow LED "FAULT":
NOTES ON THE AVAILABLE MODELS
The above Gas value is on compliance with EN61779-1.
TS293PE is calibrated to detect Acetilene (C
air easily form explosive mixtures. Its density as to air is 0.9 and its LEL (Lower Explosive Limit) is 2.3%v/v (%volume).
TS293PX-S can be calibrated to detect the gases listed in
gases not listed in this table are present in the environment we suggest to use the model TS293PX-H.
TS293PS is calibrated to detect Styrene (C
ent temperature, the vapors 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% v/v (% volume). Its main use is as monomer for the production of many plastics.
TS293PX-H can be calibrated to detect gases in
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 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.
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
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
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, 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
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Istruzione / User's Manual / Manuel d'utilisation
[ovvero che l'uscita in mA aumenti fino a circa il valore indicato nella
20% LEL alarm indication.
normal working condition
the sensor should be faulty, disconnected, out of scale or expired.
H
). It is a colorless gas, lighter than air, highly infiammable. With the
2
2
H
). It is a yellowish transparent oily liquid, which evaporates at ambi-
8
8
Table 4
Note that the LEDs are not visible when the enclosure is closed
on page
1. The replacement procedure is described in the attached manual.
(see Table
2). 2) The "Cartridge Sensor" is not working, please replace with new one. 3) If
Table 1.
On the front panel there are two F1 e F2 key,
Table 3
and is used in low polluted environments. If other
and is used in polluted environments.
Tel: 02/26 92 28 90 Fax: 02/21 33 734
Pag.4/12
circa)
2
Fig.2) si raggiunga il valo-
(vedi
Colonna 7
Colonna 8
]. Se il risultato è diver-
a 0,8%v/v (=20%LIE) in
2
).
Publicité
Table des Matières
