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Idiomas disponibles
Idiomas disponibles
Where:
Bottle Concentration (ppm):
Concentration in ppm of the sample gas
applied to the detector (in ppm). This data can
be found on the certificate of the cylinder.
F.S. (ppm):
Value in ppm of the transmitter full-scale that
is being calibrated. This data can be found on
the label of the product itself.
Regulate the 'SPAN' trimmer (shown in Fig.
9b) until the multimeter shows a current equal
to the one calculated with the formulas. If the
operation is not succsessful at the first try,
repeat the procedure again, putting the
sensor in clean air and powered for at least
10 minutes.
Make sure that on the unit the concentration
value (in ppm) measured by the related
transmitter is equal to the value of the gas
used for the test with an error margin equal to
±2% of the full-scale (e.g.: FS = 500 ppm,
error = 500 * 2 / 100 = ±10 ppm.
Place
back
the
cover
checking the tightness of the closure.
SPAN
Fig. 9b: Position of the Span control on the
sensor for toxic gases.
WARNING
It is possible to repeat the procedure as
many times as it is necessary, before
finishing the calibration phase.
It is strongly suggested to perform a
check up after the calibration with the
purpose to check the correctness of the
latter.
If the Zero or Span current values, and/or
the measured concentration value do not
fall within the expected values even after
calibration and the consequent control, the
transmitter is to be considered faulty and
so it must be sent to the manufacturer or
to an authorized servicing center to be
repaired or to be replaced.
The verification or calibration procedures
cannot
be
done
using
the complement to the gas must be
titrated air (possibly synthetic) because,
e.g. the catalytic sensors need oxygen to
work
properly.
Never
contained in lighters.
The flux of gas applied to the transmitter
sensor must remain steady during the
entire test in the interval 0.2 .. 0.4 l/min.
When the detection devices must be
deactivated even temporarily to allow the
maintenance procedure, it is necessary to
pay particular attention in activating an
alternative
detection
guarantees the safety continuity against
gas
l eaks.
As
countermeasure during the maintenance
operations it is possible to implement
more aeration or to exclude possible
sources
of
gas
leaks
chances.
Maintenance
operations
jeopardize the safety of the area under
protection. In case of doubts contact the
distributor or the manufacturer before
proceeding.
It is the system manager responsibility to
adopt all countermeasures which might
SY-N000000SE 034969 310720
grant an acceptable safety level for people
involved as well as for the environment
itself.
Never open the case unless the explosion
risk has been previously removed and no
residual risk is present.
It is highly advisable to log the results of
the maintenance operations on a specific
register, according to the current national
standards and laws.
All
instruction manual must be carried out by
skilled personnel, which should have been
adequately instructed.
The installation and the maintenance of
the
accordingly
( i n s t a l l a t i o n )
(maintenance), and be limited to what
expressly written in the instruction and
safety manual of the manufacturer.
──────────────────────────────────
TRAINING INSTRUCTIONS
──────────────────────────────────
and
screw
it,
It is necessary to verify, both when operating for
the first time and periodically, that the personnel
who uses this device have understood the
meaning of this user manual and therefore
comply with its content.
──────────────────────────────────
MODBUS ® COMMUNICATION
──────────────────────────────────
Interface:
Communication
speed:
Protocol:
Minimum polling time at 9600 baud = 200 ms
for 56 byte reading.
Minimum polling time at 38400 baud = 60 ms
for 56 byte reading.
About the detail of the registers allocation and
the implemented functions, see the table at
the end of this manual.
Writing
communication stop for about 200 ms. See
the table at the end of this manual on the
column "Description".
For any other detail related to Modbus®
communication refer to the official site
www.modbus.org.
──────────────────────────────────
FEATURES AND LIMITATIONS
──────────────────────────────────
This transmitter must be used to measure the
gas for which it has been calibrated (see the
marking on the device for the kind and range of
the gas).
Response time T
Functioning temp. range:
Humidity functioning range:
pure
gases;
Pressure functioning range:
Supply voltage:
use
the
gas
Power consumption:
Without expansion board:
With expansion board:
Activation time:
Stabilization time:
Output (4..20mA): 4 .. 20mA:
system
which
an
al ter nati ve
(Modbus ®):
Protection degree: Plast. case IP54
and
ignition
Size:
must
never
Weight:
Long term stability: In normal functioning
conditions
substances in the environment, which may alter
the operation, the catalytic sensor has a good
operations
described
in
transmitter
must
be
performed
to
the
EN60079 -14
a n d
E N 6 0 0 7 9 - 1 7
RS485
9600, 8, N, 1
Modbus ®
some
register
implies
:
<60 s (CH4).
90
See product
label.
20% .. 90% RH
(non-condensing)
800 .. 1100 hPa
12V= -10% ..
24V=+10%
2.3 W max.
4.3 W max.
60 s.
48 h.
measure
0 mA:
loop interruption
1 mA:
sensor end-life
2 mA:
fault (*)
22 mA:
over range
See Modbus ®
table
Allum. case IP66
Plast. case 98x98x54 mm
Allum. case 100x100x59 mm
Plast. case 380 g. ca.
Allum. case 487 g. ca.
and
without
potential
Pag. 15/32
long term stability of 5 years starting from the
installation and when put in operation for the
first time.
──────────────────────────────────
STORAGE
──────────────────────────────────
Temperature:
-20°C .. +55°C.
Humidity:
20% .. 90% RH
(non-condensing)
this
Pression:
800 .. 1100 hPa.
Long term drift in air: tip.-5% of the signal / year
──────────────────────────────────
SPECIAL EMPLOYMENT CONDITIONS
──────────────────────────────────
This paragraph shows all the special conditions
that may correspond to an improper use and
must be carefully avoided in order not to use the
device in an improper or unsafe way.
It is extremely important to underline that all
the catalytic sensors are able to work
correctly only if Oxygen (O2) is present; for
this reason and to obtain correct indications
from the device, the installer must be
absolutely sure that, in the environment in
which the sensor is installed, a sufficient
Oxygen concentration is present, equal to the
normal concentration in the atmosphere
v
(20.9%
/
).
v
Both during the normal operations and during
the maintenance, the presence of other
gases in the atmosphere, different from those
that are being detected, may alter the
precision
of
the
operations. Please consider that all the
catalytic sensors have a crossed sensibility
that changes in relation to several other
gases. In case of doubts please contact the
dealer.
As the sensor can detect different kind of
hydrocarbons (HC) at the same time, is
crucial for the user to consider the resulting
cumulative effect and also to evaluate the
crossed sensibility to the different gases of
the sensor.
the
As soon as the power supply is connected a
pre-heating phase starts during which the
sensor cannot detect any gas.
The response of the sensor might be
temporarily compromised when it is detecting
some
substances
among these, can be found the halogenated
gases, Sulfur Dioxide, Chlorine, Chlorinated
Hydrocarbons (Trichlorethylene and Carbon
Tetrachloride). Ask the dealer in case of
doubts.
The response of the sensor might, instead,
be definitively damaged in case it detects
some substances so called 'contaminants':
among
these
can
Silicone compounds, Tetraethyl Lead and
Phosphate esters.
toxic
measurement
or
the
so
called
'inhibitors':
be
found
several
ENGLISH
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