IST-2138.EC01.01/C
Istruzione / User’s Manual / Manuel d’utilisation
Pag.10/18
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"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
st
red
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
model, or if the 2
nd
and/or 3th red Led are already ON. In this case, please recalibrate the unit and/or replacing the
“
Cartridge
”. In case the 1
st
red Led will be already ON, only instead of flashing it will switch off for confirmation.
SE138EA-SE138EA-H
SE138EC-S-SE138EC-H
SE138ES
SE138EH
SE138EN
SE138EN
SE138EN2
4.8 mA
(15 ppm NH3)
4.8 mA
(15 ppm CO)
6.4 mA
(3 ppm SO
2
)
4.8 mA
(5 ppm H
2
S)
8 mA
(2.5 ppm HCN)
5.6 mA
(10 ppm NO)
6.6 mA
(5 ppm NO
2
)
“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
st
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 reaches
the value indicates in table below in
column 3
, depending on the model (
see also Fig.3
).
Wait around 3-5 minutes
, until the 3
rd
red Led lights (
and while it is ON
), press the key F2 and hold it pressed until
the 1
st
and 3
rd
red Led are switched off for at least 2 seconds (
but if the 1
st
red Led continues to blink more than 5-6
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 (
see also Fig.3
) and wait until the instrument activates
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
3-Flowmeter ADJ 4-TEST mA 5-mA Output 6-Central Unit Display
SE138EA
100ppm Ammonia (NH
3
) ) in Nitrogen
0.3 l/min
90÷96 mV
9.0÷9.6 mA
100 ppm
(±5)
SE138EA-H
1 l/min
SE138EC-S
300ppm Carbon monoxide (CO) in Nitrogen
0.3 l/min
190÷210 mV
19÷21 mA
300 ppm
(±20)
SE138EC-H
SE138ES
10ppm Sulphur dioxide (SO
2
) in Nitrogen
0.3 l/min
118÷122 mV 11.7÷12.3 mA
10.0ppm (±0.2)
SE138EH
50 ppm Hydrogen sulphide (H
2
S) in Nitrogen
0.3 l/min
117÷123 mV 11.7÷12.3 mA
50 ppm (±2)
SE138EHCN
10 ppm Hydrogen cyanide (HCN) in Nitrogen
0.3 l/min
192÷208 mV 19.2÷20.8 mA
10 ppm (±0.5)
SE138EN
100 ppm Nitric oxide (NO) in Nitrogen
0.3 l/min
192÷208 mV 19.2÷20.8 mA
100ppm (±5)
SE138EN2
30ppm Nitrogen dioxide (NO
2
) in air
1 l/min
190÷210 mV
19÷21 mA
30ppm (±2)
