IST-47RTS282K
Istruzione / User’s Manual / Manuel d’utilisation
Pag.6/10
Comelit Group S.p.A
. - Via Don Arrigoni 5 - 24020 Rovetta S. Lorenzo BG Italy
Tel. +39 0346 750 011 - Fax +39 0346 71436
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 con-
nected 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 F1s and F2. To have the key pres-
sure 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%v/v)
Methane in Air (20.9% Oxygen).
Catalytic sensors cannot work in oxygen deficiency
. It is possible to use either the disposable cylinders with
adjust valve or the high pressure ones with reduction gear. It is also necessary to use
the calibration kit
model
TC011
(
for non-corrosive gases
) or
TC014
(
Stainless steel
).
“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 flash of the 1° red Led and the output will be-
come 4,0 mA.
We suggest performing this operation
only if the 1st Red LED is on
(or output is different from 4mA)
after the in-
stallation or after the change of the cartridge and every 6-12 months based on the environmental conditions.
Note
:
This function is not working if the 2° e/o the 3° red Led have already been switched on .In case the 1°
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.
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 Led switch on fix and the 1° red Led starts to
flash. Insert the TC011 into the sensor holder to regulate the influx of the gas (
0.88%v/v methane in air
), the way that
the flow meter indicates around 0.3 l/mins (
see Fig.3
). Wait around 3 minutes, then when the 3° red Led switch on
(
and while it's SWITCHED ON
), press the key F2 on the instrument and hold it pressed until 1° and 3° Red Led are
switched off for at least 2 seconds (
if the 1° Red Led continue to flash, wait that the 3° Red Led switch on again and repeat the op-
eration
).
Then, close the gas cylinder and remove TC011
. At this point we can have two possibilities:
Yellow and Green Led illuminates:
the calibration routine has correctly been performed.
Wait 8 seconds, until
the instrument automatically 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, it will be necessary to send the detector back to the manufacturer for reparation.
“CALIBRATION CHECK” (
Cal Check Code
: F2, F1, F2, F1)
:
this operation allow to effect a real functional test of
the equipment with gas
after the "
Calibration
" routine, or after the installation. The “
Calibration Check
” routine should
be done during the periodic maintenances because this is the only method to verify the instrument real functioning.
With the keys perform the "
Cal Check Code
". Wait until the Yellow Led starts to flash (the green one remain fix) In-
sert the TC011 over the sensor holder, adjust the sample gas bottle valve (
0,88%v/v methane in air
), 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 Description
”.
If the result is different, is necessary to recalibrate the sensor (
see “Calibration”
).
Then, close the gas bottle, remove TC011,
press the key F2 on the instrument 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.
