IST-2138.KM02.01/B Istruzione / User’s Manual / Manuel d’utilisation Pag.6/11
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI ) Tel: 02/26 92 28 90 Fax: 02/21 33 734
tacts of the sensor with vapours of Silicon (found in paints, sealants and greases), Tetraethyl lead, and Phosphate
esters. Other substances cause a temporary loss of sensitivity, these "inhibitors" include halogens, Hydrogen sul-
phide, Chlorine, Chlorinated hydrocarbons (Trichloroethylene or Carbon tetrachloride). After a short time in fresh air,
the sensor resumes its normal operation.
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.
Operation Check, Zero Adjust, Calibration Check and Calibration: are different code protected functions. To ac-
cess these functions is necessary to insert the relevant “Code" through the keys F1 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% volume) Methane in Air (20.9% Oxygen)
You can use either the disposable cylinder, Tecnocontrol mod. BO200, complete with adjust valve or the high
pressure ones with reduction gear. Is also necessary to use the calibration kit Tecnocontrol model TC011.
“INSTRUMENT OPERATION CHECK” (Check Code: F2, F2, F1, F1): this function allows to effect a functional test
of the detector. After having inserted the "Check Code", all LEDs are switched off and all the relays are disarmed.
Then they will switch on in sequence, the LEDs, from the yellow up to the 3rd red. To the lighting of the LEDs, it cor-
responds the activation of the relevant relays (relay "FAULT" with the yellow LED, relay "ALARM1" with the 1st red LED, relay
"ALARM2" with the 2nd red LED, relay "ALARM3" with the 3rd red LED). At the end all the LEDs will remain lighted for around 5
seconds, and then the detector returns at the conditions of normal operation. It is advisable to perform this opera-
tion every 12 months according to the use.
Note: this function is not working if the 1st and/or the 2nd and/or the 3rd red LED have already turned 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). Consider that the SE138P has a sophisticated follower
of zero, that every hour will reset the sensor, if of course there is the presence of gas. If necessary, perform this op-
eration after installation or after changing the “Cartridge” or every 6-12 months depending on environmental condi-
tions. After entering the "Zero Code" as confirmation of the operation, there will be a flashing 1st red LED and the
output becomes 4.0 mA.
Note: This function is not working if the 2nd e/o the 3rd red LEDs have already been switched on. In case
the 1st red LED is already switched on only, instead of flashing it will switch off for confirmation.
“CALIBRATION” (Calibration Code: F2, F2, F2, F1, F2, F1): this function allows completely recalibrate the sensor
using the gas mixture indicated above.
Warning: to guarantee that no errors of elaboration happen, the rare possibility exists that during the Calibration
the yellow LED switch off every 8 seconds, in this case interrupt the procedure, switch off and witch on the instru-
ment 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 indicates 0mA.
The “Calibration” can be done in clean air only (environment without the presence of flammable or other polluting gas). With the
keys perform the “Calibration Code ". Wait until the yellow and green LEDs switch on fix and the 1st red LED starts to
flash. Insert the TC011 on the sensor holder and adjust the influx of the gas the way that the flow meter indicates
around 0.3 l/min (see Fig.3). Wait around 3 minutes, until the 3rd red LED lights (and while it's ON), press the key F2
and hold it pressed until 1st and 3rd red LEDs are switched off for at least 2 seconds (but if the 3
rd
red LED contin-
ues to blink more than 4-5 minutes means that the gas flow is not constant or unsatisfactory, or the concentration is
not as required, stop the operation, turn off the instrument and recalibrate). Then, close the gas cylinder and re-
move TC011. At this point we can have two possibilities:
Yellow and green LEDs illuminates: the calibration routine is correct. Wait 8 seconds, until the instrument auto-
matically restores the normal working conditions. (See “Operational Description > Preheating”)
Yellow LED illuminates: the routine has failed. In this case, wait 8 seconds, until the instrument automatically re-
peat Preheating, then repeat the “Calibration” routine without inserting again the code. If condition still persists after the
replacement of the cartridge, please send the detector back to the manufacturer for reparation.
“CALIBRATION CHECK” (Cal Check Code: F2, F1, F2, F1): using the gas mixture indicated above, this function is
used to control, the correct response to the gas and can be made after the "Calibration" or the installation. But should
be done during the periodic maintenances, as it is the only method to verify the effective functioning of the detector.
With the keys perform the "Cal Check Code". Wait until the yellow LED starts to flash (the green one remain fix) Insert
the TC011 over the sensor holder, adjust the sample gas bottle valve as the flow meter indicates around 0.3 l/mins
(see Fig.3), wait for 3 minutes and check that the instrument activates Alarms as shown in chapter “Operational De-
scription”. If the result is different, it is necessary to recalibrate the sensor (see “Calibration”). Then, close the gas bot-
tle, remove TC011, press the key F2 to restore the normal working conditions.
NOTE: further to the above, If the mA output is also used, verify with a voltmeter connected to the Test-Point
“TESTmA”, the value reach a value between 184 and 216mV, [corresponding to 20mA (±1.6) output and the central
unit should be display about 20% LEL (±2)]. Then, the mA output will slowly decrease up to 4mA.
To Next Page
Loading...