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IST-2220.EO03.01/A
Dopo aver inserito il "Codice Reg. Fine", il Led Giallo inizia a lampeggiare, il valore aumenta con il Tasto F1 e dimi-
nuisce con F2. Per confermare, tenere contemporaneamente premuti i due tasti F1 ed F2 per 2 secondi e dopo
controllare che il Led Giallo rimanga spento.
Questa operazione non può essere usata se è già acceso il Led Giallo, o se la concentrazione di O
20,6 o superiore a 21,2 in questo caso va prima fatta la "CALIBRAZIONE IN ARIA".
"VERIFICA"(non serve codice): anche se il funzionamento del sensore è garantito se viene periodicamente esegui-
ta con successo la "Calibrazione in Aria", è comunque possible simulare la risposta del rilevatore al Gas utilizzando
una bombola con miscela di Gas circa al 15% Ossigeno in azoto.
Con i puntali del volmetro sui Test-Point "TESTmA", (vedi Fig.2) controllare che ci siano circa 174 mV in funziona-
mento normale in aria (20,9% O
morsetti "S e –" verificare che ci siano 17,4mA circa]. Infilare il TC011 sul portasensore, regolare il riduttore della Bombola in
modo che il flussometro indichi circa 0,3 l/min
ca 136mV [ovvero che l'uscita in mA diminuisca fino a circa 13,6 mA]. Terminata la "Verifica", chiudere la bombola, togliere il
TC011. Attendere 3-5 minuti per tornare alle condizioni di funzionamento normale.
EN
DESCRIPTION
The TS220EO series are a Oxygen three-wire 4÷20mA transmitter employing an electrochemical sensor that find
its application in centralized alarm systems for laboratories, industries and environments to be protected from the
Oxygen deficiency, leakage or enrichment and also from presence of inert gases. The instruments comprise of a
thermoplastic case in which the electronic circuit and the terminals are mounted. The enclosure has downward fac-
ing cylindrical sensor housing with inside a "Replaceable Cartridge Sensor".
The instrument has a 4÷20mA linear output (S) with 25.0 % O
Central Unit as listed in
tine, protected by a code, and 3 Led shows the working conditions:
Red LED "ALARM":
Green LED "ON":
Yellow LED "FAULT":
NOTES ON THE DETECTED GAS
Oxygen (O
) is a colourless, odourless gas, a little heavier than air (its density to air is 1.1). Oxygen is not a flam-
2
mable gas, it is a strong oxidant which reacts with reducing and flamable materials, increasing the risk of fire and
explosion. We all need to breathe the oxygen in air to live. Air is made up of several different gases including oxy-
gen. Normal ambient air contains an oxygen concentration of 20.9% v/v. When the oxygen level dips below
19.5%v/v, the air is considered oxygen-deficient. Oxygen concentrations below 16%v/v are considered unsafe for
humans. Oxygen concentrations below 6%v/v cause death. Considered that the Oxygen decreasing may be
caused by combustion, leakage of other gases (toxic and / or flammable) or also displaced by inert gases increas-
ing in the environment (nitrogen, helium, argon etc.). A high concentration, more than 24%v/v O
respiratory tract and can cause effects on the central nervous system, eyes and lungs that can be damaged by the
inhalation of high concentrations.
OPERATIONAL DESCRIPTION
The electrochemical sensor is temperature compensated, but is sensitive to extreme humidity variations.
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 15 minutes continual functioning.
Normal operation: the green LED "ON" should be light on.
The Red LED (ALARM) illuminates when the O
vate by setting ON Dip-Switch n.1).
Faults: the instrument signal different kind of failures, as listed below. The Yellow LED illuminates, the "S" output
falls down to 0 mA
Yellow LED illuminates each 4 seconds (with Green LED activate): this happens when the "Cartridge Sensor" has
overcome its theoretical period of life and its correct operation is not longer guaranteed. The detector keeps on op-
erating normally but it is necessary to replace, as soon as possible, the "Cartridge Sensor" with a new one. The
type to be required is described at
Yellow LED activate, Green LED off (0 mA 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
vice. 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 (0 mA output signal): this happens when the "Cartridge Sensor" is not working.
First try to perform the procedure of " Calibration in Air" as described in the section "Test and Calibration > Calibra-
tion in Air " then disconnect 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.
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Istruzione / User's Manual / Manuel d'utilisation
) [oppure se l'uscita in mA non fosse utilizzata, con i puntali del milliamperometro direttamente sui
2
(vedi Fig.
Table 1.
On the front panel there are two F1 e F2 key, using for the Test and Calibration rou-
22,5% O
2
normal working condition
the sensor should be faulty, disconnected, out of scale or expired.
Pag.
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
3). controllare che si raggiunga in 2÷3 minuti un valore di cir-
F.S. This output is connectable to a remote Gas
2
alarm indication
concentration attains 22,5 %
2
(see Pag.
1) these checks are made switching off and on the de-
2
or
drops below 19,5% (only if it be acti-
Tel. +39 02 26922890 - Fax +39 02 2133734
Pag.4/9
è inferiore a
2
is irritating to the
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