Tecno Control TS255CB User Manual Download Page 6

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IST-2255.CB01.01

Istruzione / User’s Manual / Manuel d’utilisation

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TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )

Tel. +39 02 26922890 - Fax +39 02 2133734

as sprays, detergents, ammonia, glues and paints. However, in case of products containing substances in great
quantity, these could cause false alarms. We recommend ventilating the room when products like these are used.
Alcohols, Hydrogen and volatile organic solvents in great quantity cause false alarms, and then the sensors needs
one or more

hours in clean air to recover the normal sensitivity conditions.

AFETY

THE

ETROL

SENSOR

(S2)

IS A CATALYTIC SENSOR

that operates only in presence of Oxygen. Do not

use pure gases or a lighter directly on the sensor since they could damage it irremediably. Consider that the sensor
life can be reduced, in polluted environments, or with flammable vapours (

especially solvents

) and in great quantity

can cause false alarms. Some substances cause a permanent reduction in sensitivity. Avoid contacts of the sensor
with vapours of Silicone compounds, Tetra-ethyl Lead (

petrol antiknock additive

) and Phosphate esters, since they can

reduce irremediably its sensitivity. Some substances produce a temporary loss of sensitivity. This “inhibitors”
include Hydrogen sulphides, Chlorine, Chlorinated hydrocarbons and halogenated compounds. The sensitivity is
recovered after a short period of running in clear air.

TEST and CALIBRATION

TTENTION

This procedure has to be made with attention by authorized and trained people; starting this

procedure it will increase mA Outputs causing the activation of connected alarm devices to the Gas Central Unit.

PERATION

HECK

ERO

DJUST

ALIBRATION AND

ALIBRATION

HECKS

(

only for sensor S1

are different code

protected functions. To access these functions is necessary to insert the relevant “

Code

" through the keys F1 and

F2. These two buttons are touching sensitive, to enable the procedure, touch the key with the tip of a finger. To
have the key pressure recognized, hold pressing it for around a second (

until the Green LED doesn't switch off for a moment

with one Buzzer beep for F1 and two Buzzer beeps for F2

). Then the next key can be pressed. Then buzzer beeps along to

confirm the validity of the inserted code. In case of error, it is enough to wait around 10 seconds, and the
sequence, signalled by three Beeps, will be automatically erased.

ALIBRATION

AMPLE

OTTLES

(

for Calibration Check and Calibration

) please, only using two mixture

300ppm

CO in Nitrogen

and

0.88%v/v (20%LEL) Methane in Air.

It is possible to use either the disposable one litre

cylinders with adjust valve or the high pressure ones with reduction gear. Is also necessary the Tecnocontrol
Calibration Kit model TC011.

“INSTRUMENT OPERATION CHECK” (

Check Code

F2, F2, F1, F1

)

this function allows to effect a functional

test of the equipment. After having put the system in safety and inserted the "

Code Test

", all LED are switched off.

Then they will switch on in sequence, the LED, from the yellow up to the red. The two 4÷20mA outputs remain
unchanged. At the end all the LED will remain lighted for around 5 seconds, then the central returns at the
conditions of normal operation. It is advisable to perform this operation every 6-12 months according to the use.

Note: this function is not working if one or both the red LED has already turned on

“ZERO ADJUST” (

Zero Code

F2, F1, F1, F2

)

This function is used to manually adjust the Zero of both sensors

and can be done in clean air only (environment without the presence of toxic gas or other pollutants). Immediately
after having inserted the "

Zero Code

", as a confirmation of the operation carried out there will be 1 flash of the two

red LED and both the outputs will become 4,0 mA. We suggest performing this operation after the installation or
after the change of the cartridge and periodically based on the environmental conditions.

Note

This function is not working if mA output S1 is more than 4.8 mA (15 ppm CO) or S2 is more than

12mA (10%LEL Petrol Vapours) and/or one or both Red LED are already been switched on. In this case, it
will be necessary to recalibrate the unit and/or replacing the corresponding “Cartridge”

“CALIBRATION”

this function allows completely recalibrate the sensors, everyone with their own code and gas

as explain up in the box.

Warning

to guarantee that no errors of elaboration happen, the possibility exists that during the Calibration the

corresponding yellow LED switch off every 8 seconds, in this case interrupt the procedure, switch off and switch on
the instrument and repeat the Calibration. If condition persists it will be necessary to send the detector to the supplier
for the reparation.

Important note:

during Calibration routine the mA output is 0mA

. The “

Calibration

” can be done in clean air only

(

environment without the presence of toxic or other polluting gas

). With the keys perform the respective “

Calibration Code

The

Calibration Code for the Sensor 1 (

placed on the housing

) to CO gas is: __

F2, F2, F2, F1, F2, F1

The

Calibration Code for the Sensor 2 (

located below

) to Petrol Vapours is: __

F2, F1, F1, F1, F2, F1

Wait until the respective Yellow and Green LED switch on fix and the red LED starts to flash. Insert the TC011 into
the respective sensor holder to regulate the influx of the gas the way that the flow meter indicates around 0

l/mins

(

see Fig.3

). Wait around 3 minutes, then when the red LED switch on (

and while it's SWITCHED ON

), press the

key F2 on the instrument and hold it pressed until the Red LED is switched off for at least 2 seconds and the
Buzzer beeps (

if the Red LED continue to flash, repeat the operation

Then, close the gas cylinder and remove TC011.

this point we can have two possibilities:

Yellow and Green LED illuminates:

the calibration routine has correctly been performed.