IST-2282.PM01.01
Istruzione / User’s Manual / Manuel d’utilisation
Pag.5/10
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Tel. +39 02 26922890 - Fax +39 02 2133734
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 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.
Model TS282PG
should be fixed at 20-30 cm from the floor (LPG gas is heavier than air).
Model TS282PM
should be fixed at 20-30 cm from the ceiling (Methane gas is lighter than air).
Model TS282PI
should be fixed at 20-30 cm from the ceiling (Hydrogen gas is lighter than air).
Model TS282PB
should be fixed at 20-30 cm from the floor (Petrol vapours are heavier than air).
Model TS282PX
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
– 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
Red LED indication (
see Table 2
).
Important
:
Once installation is completed,
power up the unit,
wait about 20÷30 minutes and then,
only if it is
necessary
,
to adjust the sensor to the environment conditions,
carry out the
Zero Adjust
(
see
Test and Calibration
)
.
COMPATIBILITY WITH OTHER CENTRAL UNITS:
In case of a central unit other than 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 increase mA Output causing the activation of connected
alarm devices to the gas Central Unit.
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).
Pellistor sensors cannot work in oxygen deficiency
. It is possible to use either the disposable one litre cylin-
ders with adjust valve or the high pressure ones with reduction gear. It is also necessary to use
the calibration kit
Tecnocontrol model TC011
(
for non-corrosive gases
) or
TC014
(
Stainless steel
).
“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
only if the output is different from 4mA
after the installation or af-
ter the change of the cartridge and every 6-12 months based on the environmental conditions.
