Installation; Warning; Test And Calibration - Tecno Control SE137EC-S Manuel D'utilisation

IST-2137.EC03.01/A

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.
Detector positioning: The
downwards. It should be fixed at 1.60 m from the floor (the CO gas is lighter as air).
Electrical Connection
Table 1. If more than one detector is to be powered in parallel, it is necessary to consider the voltage drop a-
the
cross the supply cable. Normally use a two wire cable (not shielded) for power supply + the conductors for output re-
lay. If the output signal is used in mA, please use 3 conductors screened cables + conductors for relay output. The
max load resistor is 50 ohm with 12Vdc power supply, while is 400 ohm with 24Vdc power supply
Power Supply terminals, on the main board, are plug-in type, it is necessary to extract them to make the connec-
tion, pay attention when you insert them again, being polarized. The relays terminals, on outputs board, are fixed.
The sealed relays are tension free SPST (Single Pole Single Throw) contacts and should be set NO (Normally Open) or
NC (Normally Closed) by positioning the 4th Dip-Switch
tration for alarm activations is determined. Some alarms can be set with TLV-TWA and STEL functioning.
Note: Dip-Switch should be set with instrument powered off. Dip-Switch settled in reserved position activate Fault
indications (see "Operational Description > Faults").
Important: Once installation is completed, it is necessary to adjust the sensor to the environment conditions, con-
nect the unit, wait about 30÷60 minutes and the carry out the "Zero Ad just" (see 'Test and Calibration >).

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 SE137EC-S sensor's life is about 3 years, while the SE137ECH one is about 2 years.
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 6 or 12 months. Tests, Zero Adjust and Calibration
with Gas/Air mixture as explained on page 4 chapter "Tests and Calibration".
Note: the detector is not able to detect CO gas outside the room where it is installed, neither under the floor.
Sensor operating limits: the electro-chemical cell, in any case, should not be exposed to temperatures lower
than -40° or higher than 60°C. The electrochemical cell should not be exposed to an over-range concentration of
1500ppm CO. If this condition occurs, we suggest replacing the sensor.
Safety: electrochemical Cell contains a small quantity of sulphuric acid. It is possible that either a very strong me-
chanical action or an incorrect instrument use beyond the limits of its operational functioning could provoke a liquid
leak out of the sensor. Should this event occurs, please avoid touching the come out liquid. Should a contact with
either the skin or eyes occur, wash immediately and abundantly with water.
Cross sensitivity to other gases: this detector is designed to detect CO leaks at a very low concentration. The
electrochemical cell employed has a good resistance towards products such as sprays, detergents, ammonia,
glues and paints. However, in case of products containing substances in great quantity, these could interfere with
the Sensor and cause false alarms. We recommend ventilating the room when products like these are used. Alco-
hols, Hydrogen and volatile organic solvents in great quantity cause false alarms, and then the cell needs one or
more hours in clean air to recover the normal sensitivity conditions.

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 func-
tions is necessary to insert the relevant "Code" through the keys F1s and F2. To have the key pressure recog-
nized, 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.
The Calibration Check is a function code free.
Calibration Kit, Sample Gas Bottles (for Calibration Check and Calibration) please, only using a mixture 300ppm
CO in Nitrogen. 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 and all
the relays are disarmed. Then they will switch on in sequence, the Led, from the yellow up to the 3° red. To the
lighting of the various Led it corresponds the activation of the relevant relays (relay "FAULT" with the yellow Led, relay
"ALARM1" with the 1° red Led, relay "ALARM2" with the 2° red Led, relay "ALARM3" with the 3° red Led). 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 the 1° and/or the 2° and/or the 3° 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). Immediately after having inserted the "Zero
Code", as a confirmation of the operation carried out there will be 1 I flash of the 1° red Led and the output will be-
come 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.
TECNOCONTROL S.r.l. Via Miglioli 47 SEGRATE ( MI )
Istruzione / User's Manual / Manuel d'utilisation
Fig. 2
shows the instrument size. The unit must be positioned vertically with the sensor
Fig.2): the maximum distance to install each detector from the power supply show in
(see
(see Table 2). With the Dip-Switches from 1 to 3 the concen-
Tel: 02/26 92 28 90 Fax: 02/21 33 734
Pag.6/11
(see fig.4).