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IST-2282.KM01.01(Rev.1)
TS282KG (GPL) is calibrated to detect LPG, a gas heavier than air and consists of a mixture of 20÷30% Propane
(C
H
) and 80÷70% Butane (C
3
8
Propane and 1.4%v/v for Butane. Standard calibration to LPG is carried out for Butane gas.
TS282KI (Hydrogen H
the lightest gas. Its density as to air is 0.07 and its LEL (Lower Explosive Limit) is 4%v/v (%volume).
TS282KB (Unleaded Gasoline/Petrol) is calibrated to detect Gasoline vapours heavier than air and highly
flammable. Its density as to air about 2.8 and its LEL (Lower Explosive Limit) is about 1.2%v/v (%volume).
OPERATIONAL DESCRIPTION
The catalytic sensor is practically insensitive to humidity and temperature variations. The calibration is carried out for
the specific gas to be detected. Anyway, it can contemporaneously detect any other flammable gas that should be
present in the same environment.
Preheating: when powered, the sensor needs a time of preliminary heating of about 60 seconds. During this period
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 the Gas concentration attains 20%LEL (only if it be activate by Dip-
Switch). Faults: the instrument signal different kind of failures, as listed below. The Yellow LED illuminates and the
"S" output falls down to 0mA.
Yellow LED illuminates each 4 seconds (with Green LED activate): this happens when the "Cartridge Sensor"
has overcome its period of life (about 5 years) and its correct operation is no longer guaranteed. The detector keeps
on operating but it is necessary to replace, as soon as possible, the "Cartridge Sensor" with a new one. The type to
be required is described in
Yellow LED activates, Green LED off (0mA output signal): this signal different kind of faults. 1) The Dip Switch
set up is wrong, please verify
3) If 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
the device. 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 (0mA 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
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
concentration is out of scale (higher than 25% LIE) 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 TS282KG positioning: it should be fixed at 20-30 cm from the floor (LPG gas is heavier than air).
Model TS282KM positioning: it should be fixed at 20-30 cm from the ceiling (Methane gas is lighter than air).
Model TS282KI positioning: it should be fixed at 30-40 cm from the ceiling (Hydrogen gas is lighter than air).
Model TS282KB positioning: it should be fixed at 30-40 cm from the floor (Petrol gas is heavier than air).
Electrical Connection
(see
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
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
WARNING
Average life: The sensitive element used in this detector has an excellent stability in time. In fresh air and in normal
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".
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Istruzione / User's Manual / Manuel d'utilisation
H
). Propane density as to air is 1.56 while Butane' is 2.05. The LEL is 1.7%v/v for
4
10
) is calibrated to detect Hydrogen, is a colourless, odourless, highly flammable gas and is
2
Table
3. The replacement procedure is described in the attached manual.
2). 2) The "Cartridge Sensor" is not working, please replace with new one.
(see Table
Fig.2): the maximum distance to install each detector from the Gas Central Unit is show
2).
Fig.
4. We suggest using 24Vdc power supply.
(see Table
3) these checks are made connecting and disconnecting
Tel. +39 02 26922890 - Fax +39 02 2133734
Pag.5/8
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