IST-2293.PX03.01
Istruzione / User’s Manual / Manuel d’utilisation
Pag.5/12
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Tel: 02/26 92 28 90 Fax: 02/21 33 734
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.
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 100% LEL) 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.
INSTALLATION
The detector must be accurately installed and testing according to the national dispositions in force on the safety of
the plants and installation of electric devices in areas with danger of explosion.
Mounting
: The
Fig. 2
shows the instrument size. The unit must be positioned vertically with the sensor downwards.
Models TS293PE should be fixed at 20-30 cm from the ceiling (Acetylene is lighter than air).
Models TS293PS should be fixed at 20-30 cm from the floor (Stirene vapours are heavier than air).
Model TS293PX-S and TS293PX-H should be fixed in high position with a gas Vapour Density less than 1 (
the gas is
lighter than air
) or in bottom position with a density greater than 1, (
the gas is heavier than air
)
(
see Table 3, 4 and 5 column n.4
).
Electrical Connection (
see Fig.2
)
: the maximum distance to install each detector from the Gas Central Unit is show
in
table 1
. Normally use a tree wire shielded cable.
The terminals (+
- S
), are plug-in type, it is necessary to extract them to make the connection. Pay attention when
you insert them again, being polarized. With the Dip-Switches the Alarm Red Led activation is determined.
Note:
Dip-Switch should be set with instrument powered off. Dip-Switch 1 settled ON activates ALARM Led indica-
tion (
see Table 2
).
Important:
Once installation is completed,
it is necessary to adjust the sensor to the environment conditions,
con-
nect the unit, wait about 20÷30 minutes and then carry out the
”Zero Adjust”
(see ‘
Test and Calibration >
).
COMPATIBILITY WITH OTHER CENTRAL UNITS: In case of a central unit other then Tecnocontrol,
please
verify the max load resistor as shown in
Fig. 4
. We suggest using 24Vdc power supply.
WARNING
Average life
: The sensitive element used in this detector has an excellent stability in time. In fresh air and in nor-
mal working condition the sensor's life is about 5 years from the date of installation. After this period the yellow LED
“
FAULT
” flashes every 4 seconds, is necessary replacing the “
Cartridge Sensor
”.
Periodical testing
: we advise to carry out working tests every 12 months. Tests, Zero Adjust and Calibration with
Gas/Air mixture as explained in chapter “
Tests and Calibration
”.
Note:
the detector is not able to detect gas leaks occurring outside the room where it is installed, neither inside
walls nor under the floor.
Important:
The catalytic Pellistor sensor operates only in presence of Oxygen. Do not use pure gases or a lighter
directly on the sensor since they could damage it irremediably.
Warning:
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 Hy-
drogen sulphides, Chlorine, Chlorinated hydrocarbons and halogenated compounds. The sensitivity is recovered
after a short period of running in clear air.
TEST and CALIBRATION
PAY ATTENTION
: This procedure has to be made with extreme attention and by authorized and trained people;
because starting this procedure it will start both Outputs (relays) causing the activation of connected alarm devices.
The instrument has three different code protected functions:
Operation Check, Zero Adjust and Calibration
.
Operation Check, Zero Adjust and Calibration:
are different code protected functions. To access these functions is
necessary to insert the relevant “
Code
" through the keys F1s and F2. To have the key pressure recognized, hold
pressing it for around a second (
until the Green Led doesn't switch off for a moment
). Then the next key can be pressed. In
case of error all it takes is waiting around 10 seconds and the sequence is automatically erased.
Calibration Kit, Sample Gas Bottles
(
for Calibration Check and Calibration
)
please, only
using a mixture 20%LEL
(0.88%v/v)
Methane in Air (
20.9% Oxygen
).
Catalytic sensors cannot work without Oxygen
. 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. 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 op-
eration every 6-12 months according to the use.
Note: this function is not working if the red Led is already switched on
“ZERO ADJUST” (
Zero Code
: F2, F1, F1, F2)
:
this function is to adjust the Zero sensor and can be done in clean
air only (environment without the presence of 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 red Led and the output will become
4,0 mA. We suggest performing this operation after the installation or after the change of the cartridge and every 6-
12 months based on the environmental conditions.
Note: This function is not working if mA output is more than 5,6mA (10% LEL) and/or red Led is already
been switched on. In this case, it will be necessary to recalibrate the unit and/or replacing the “Cartridge”
