Tecno Control SE138E Series User Manual page 10

IST-2138.EC01.01/C
"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 detector returns at the conditions of normal operation. It is advisable to perform this operation
every 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 toxic gas or other pollutants). Consider that the SE138E series have a sophisti-
cated follower of zero, that every hour will reset the sensor, if of course there is the presence of gas. If necessary,
perform this operation after installation or after changing the "Cartridge" or every 6-12 months depending on envi-
ronmental conditions. After entering the "Zero Code" as confirmation of the operation, there will be a flashing 1
Led and output becomes 4.0 mA.
Note: This function is not working if mA output is higher than the value shown in the table below, depending on the
nd
model, or if the 2 and/or 3th red Led are already ON. In this case, please recalibrate the unit and/or replacing the
st
"Cartridge". In case the 1
SE138EA-SE138EA-H SE138EC-S-SE138EC-H
4.8 mA
(15 ppm NH3)
"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 possibility exists that during the Calibration the yel-
low Led switch off every 8 seconds, in this case interrupt the procedure, switch off and switch on the instrument 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 toxic or other polluting gas). With the
keys perform the "Calibration Code". Wait until the yellow and green Led switch on fix and the 1
flash. Insert the TC011 on the sensor holder and adjust the influx of the gas the way that the flow meter reaches
the value indicates in table below in column 3, depending on the model
Wait around 3-5 minutes, until the 3
st rd
the 1 and 3 red Led are switched off for at least 2 seconds (but if the 1
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 remove TC011. At this point we
can have two possibilities:
Yellow and green Led 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 CHECKS" (no Code required): using the gas mixture indicated above, this function is used to con-
trol, 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. Insert
the TC011 on the sensor holder and adjust the sample gas bottle's valve, so that the flow meter reaches the value
indicates in table below in column 3, depending on the model
alarms as shown in chapter "Operational Description". If the result is different, is necessary to recalibrate the sensor
(see "Calibration"). Then, close the gas bottle and remove TC011, wait 3÷5 minutes until the instrument restores the
normal working conditions.
NOTE: further to the above, If the mA output is also used, check that the voltmeter, with probes connected on tests
points "TEST mV", (see fig.2) reaches (in 3÷5 minutes) the value shown in column 4, depending on the model, [corre-
sponding to mA output indicated in column 5 and the Central Unit which is connected to the detector, displays the value indicated in col-
umn 6]. If the result is different, is necessary to recalibrate the sensor (see "Calibration"). Then, close the gas bottle,
remove TC011. The mA output will slowly decrease up to 4 mA (normal working conditions).
1-Model 2-Sample gas bottle to be use
SE138EA
100ppm Ammonia (NH
SE138EA-H
SE138EC-S
300ppm Carbon monoxide (CO) in Nitrogen
SE138EC-H
SE138ES
10ppm Sulphur dioxide (SO
SE138EH
50 ppm Hydrogen sulphide (H
SE138EHCN
10 ppm Hydrogen cyanide (HCN) in Nitrogen
SE138EN
100 ppm Nitric oxide (NO) in Nitrogen
SE138EN2
30ppm Nitrogen dioxide (NO
TECNOCONTROL S.r.l. - Via Miglioli, 47 20090 SEGRATE (MI) ITALY
Istruzione / User's Manual / Manuel d'utilisation
red Led will be already ON, only instead of flashing it will switch off for confirmation.
SE138ES
4.8 mA
(15 ppm CO) (3 ppm SO
rd
red Led lights (and while it is ON), press the key F2 and hold it pressed until
) ) in Nitrogen
3
) in Nitrogen
2
S) in Nitrogen
2
) in air
2
SE138EH
6.4 mA 4.8 mA
) (5 ppm H S)
2 2
(see also
st
(see also Fig.3) and wait until the instrument activates
3-Flowmeter ADJ 4-TEST mA
0.3 l/min
90÷96 mV
1 l/min
0.3 l/min 190÷210 mV
0.3 l/min 118÷122 mV 11.7÷12.3 mA
0.3 l/min 117÷123 mV 11.7÷12.3 mA
0.3 l/min 192÷208 mV 19.2÷20.8 mA
0.3 l/min 192÷208 mV 19.2÷20.8 mA
1 l/min 190÷210 mV
SE138EN SE138EN
8 mA 5.6 mA
(2.5 ppm HCN) (10 ppm NO)
st
Fig.3).
red Led continues to blink more than 5-6
5-mA Output 6-Central Unit Display
9.0÷9.6 mA
19÷21 mA
19÷21 mA
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Pag.10/18
st
red
SE138EN2
6.6 mA
(5 ppm NO )
2
red Led starts to
100 ppm (±5)
300 ppm (±20)
10.0ppm (±0.2)
50 ppm (±2)
10 ppm (±0.5)
100ppm (±5)
30ppm (±2)