Description; Notes On The Detected Gas; Operational Description - Tecno Control TS220EA Manuel D'utilisation

IST-2220.EA01.01
Led Giallo e Verde accesi: la calibrazione è stata eseguita correttamente, dopo 8 secondi l'apparecchio si spe-
gne e si riavvia automaticamente in funzionamento normale (vedi capitolo FUNZIONAMENTO " Preriscaldo").
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 sarà neces-
sario sostituire e/o inviare il rilevatore al fornitore per la riparazione.
"VERIFICA"(non serve codice): serve per controllare la corretta risposta del rilevatore al Gas e può essere effet-
tuata sia dopo la "Calibrazione" sia dopo l'installazione, ma va eseguita soprattutto durante le manutenzioni perio-
diche, in quanto è l'unico metodo sicuro per controllare l'effettivo funzionamento del sensore.
La Verifica va eseguita utilizzando la miscela Gas NH
Infilare il TC011 sul portasensore, regolare il riduttore della Bombola in modo che il flussometro indichi circa 0,3
(vedi Fig. 3 Controllare che il multimetro, con i puntali sui Test-Point "TEST mA"
l/min
nuti i 90÷96 mV. [ovvero che l'uscita in mA aumenti fino a circa 9,3 mA e la centrale, cui è collegato il Trasmettitore, indichi circa
100ppm (±5)]. Se il valore è molto diverso è opportuno effettuare la "Calibrazione". Terminata la "Verifica", chiudere
la bombola, togliere il TC011. Attendere 3-5 minuti per tornare alle condizioni di funzionamento normale.
GB

DESCRIPTION

The TS220EA series is a Ammonia three-wire 4÷20mA transmitter employing an electrochemical sensor. This
model is employed in gas monitoring systems for laboratories, industries and environments to be pro-
tected from the presence of NH
cuit 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 300 ppm NH
Gas Central Unit as listed in
tion routine, 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

The above Gas value is on compliance with EN61779-1.
) is a toxic gas, colourless and with a characteristic pungent smell. This gas is irritating to the eyes
Ammonia (NH
3
and mucous membranes (respiratory and digestive tracts). It is lighter than air, its density is 0.6 relative to air. Its
LEL (Lower Explosivity Limit) is 15% v/v (volume). The TWA is 25ppm and STEL is 35ppm.
Ammonia is used in industrial refrigeration applications. it is also used as fertilizers (as its salts), as a component
in paints, for the production of plastics and polymers, or as solvent or as cleaners.

OPERATIONAL DESCRIPTION

The electrochemical sensor is temperature compensated, but is sensitive to extreme humidity variations. The cali-
bration is carried out with NH
the same environment as listed in
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 NH
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 Page1. The replacement procedure is described in the attached manual.
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
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
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 "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.
Only with Red set-up "activate" all LED activates (>24 mA output signal): this happens when the "Cartridge Sensor"
is not working or gas concentration is out of scale (higher than 300ppm) 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.
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Istruzione / User's Manual / Manuel d'utilisation
. The instruments comprise of a thermoplastic case in which the electronic cir-
3
Table 1.
On the front panel there are two F1 e F2 key, using for the Test and Calibra-
50 ppm alarm indication
normal working condition
the sensor should be faulty, disconnected, out of scale or expired.
gas. Anyway, it can contemporaneously detect other gases that should be present in
3
table 4.
concentration attains 50 ppm (only if it be activate by setting ON Dip-Switch
3
(see Table 2). 2) The "Cartridge Sensor" is not working, please replace with new one. 3) If a
(see Table
100 ppm in azoto.
3
F.S. This output is connectable to a remote
3
3) these checks are made switching off and on the device. If
Fig.2) raggiunga in 2÷3 mi-
(vedi
Tel: 02/26 92 28 90 Fax: 02/21 33 734
Pag.4/9