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Idiomas disponibles
Idiomas disponibles
L2: Yellow LED (Fault)
Following, in correspondence to the number of
blinks, is listed the type of fault:
1: Power out of the range
2: Sensor fault
3: Sensor fault + Power out of the range
4: Sensor end life
5: Sensor end life + Power out of the range
6: Sensor end life + Sensor fault
7: Power out of the range + Sensor end life +
Sensor fault
8: Error on flash data writing
9: Error on flash data writing + Power out of
the range
10: Error on flash data writing + Sensor fault
11: Error on flash data writing + Sensor end life
12: Error on flash data writing + Sensor fault +
Power out of the range
13: Error on flash data writing + Sensor end life
+ Sensor fault
14: Error on flash data writing + Power out of
the range + Sensor end life + Sensor fault
Steady on (Fault detector):
Microcontroller code memory error
Ram memory error
Flash memory error
Flash-Data memory error
Off:
No Fault
L3: Red LED (Pre-alarm/Alarm)
Blinking (Pre-alarm):
It indicates that the transmitter has detected a
gas concentration higher than the set pre-alarm
threshold.
Steady on (Alarm):
It indicates that the transmitter has detected a
gas concentration higher than the set alarm
threshold.
L1: Red LED (Auxiliary)
On for 2s:
Manual Reset of sensor life;
Manual Reset sensor parameters (default);
Manual Reset Modbus ® parameters (Add.=01
and Baud Rate=9600);
Module Reset via Modbus ® command;
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BUZZER
(ACIR01 interface required - optional)
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Steady sound:
Alarm
Intermitting sound:
Pre-alarm
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RELAY
(ACIR01 interface required - optional)
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Alarm Relay:
It remains active until the concentration exceeds
the alarm threshold.
Pre-alarm Relay:
It remains active until the concentration exceeds
the pre-alarm threshold.
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MODBUS ® INTERFACE
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On the main board, both the interfaces 4..20mA
and Modbus® are available: through the latter
several parameters can be read and written with
the commands sent via bus.
The Modbus® interface consists in two rotary
switches (tens and units) for the setting of the
device address, two power supply terminals for
the circuit and two terminals (A and B) for the
BUS RS485.
The parameters, like address and baud rate,
can be modified by the user writing in the
respective registers with the function 06.
The changes of the address and baud rate will
be activated just after the reset board command
is sent (COIL-39) or after power up.
The transmitter, through the monitoring of the
additional board ACIR01 (optional), allows the
acoustic signalling of the pre-alarm, alarm and
the activation of two output relays.
The LEDs on the additional board report the
status of the first three LEDs on the main board
(L2-L4).
SY-N000000SE 034969 310720
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4 .. 20 mA MODE
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The device acts as a standard transmitter: the
Alarm and pre-alarm LEDs show the exceeding
of the respective thresholds set by factory
default. These thresholds, if required, are still
editable through Modbus® command.
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MODBUS® MODE
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In this mode, the transmitter parameters can be
read and modified by the control unit.
WARNING
Every 24 hours, the sensor life time will be
updated in the non-volatile memory of the
transmitter; at that moment the transmitter
®
will interrupt the MODBUS
communication
for about 300ms.
Two settings can be selected via Modbus®:
outputs and LEDs.
If the COIL-40 is set to 0, the Alarm/Pre-alarm
relay output and the buzzer, will be controlled by
the transmitter logic according to the set
thresholds; otherwise they will be controlled by
Modbus® according to the value of the registers
40 and 41. In the same way, if the COIL-41 is
set to 0, the LEDs are controlled by the
transmitter logic, otherwise are controlled by
Modbus® according to the content of the
register OutBitReg (REG-01). This function can
be useful to assign for both relays and LEDs,
different transmitters activation characteristics
other than those provided as standard. If the
COIL 42 is set to 0 it will control the buzzer.
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TRANSMITTER DATA RESET
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Setting reset (except the life time of the
sensor):
It is possible to reset the settings memory by
default data, shorting the jumper JP5 for at least
5 seconds during the power-up time (60 sec,
LED L4 blinking green): in this way the
transmitter is brought back to the initial mode
(the modified records are reset by the Modbus®
but not the life of the sensor). The reset is
signalled by the lighting of the auxiliary red LED
L1 (present only on the main board) for 2 sec.
The same function can be activated via
Modbus® writing 1 in the COIL-36.
Sensor life Reset (except the settings):
Short-circuit the JP4 for at least 10 seconds
during the power-up time (blinking green LED)
to reset the life time of the sensor to the
standard
value
written
in
according to the kind of gas selected.
This function allows to reset the life time of a
sensor/nose when it is changed with a new one.
The occurred recovery is displayed with the
lighting of the auxiliary red LED. The same
function can be activated via Modbus®, writing
1 in the COIL-38.
Default transmitter data according to the
installed sensor
CH4
VB
Elapsed Lifetime
0
0
(gg)
Set Lifetime (gg)
1825 1825 1825 1825
Prealarm (ppm)
4400 800
Alarm (ppm)
8800 1600 80
Range Lo (ppm)
22000 4000 300 6750
Range Hi (ppm)
44000 8000 500 13500
F.S. LEL Lo (0.1%)*
500
500
F.S. LEL Hi (0.1%)* 1000 1000
*: The LEL values are expressed in 0.1%
(1000 = 100.0% L.E.L.)
Resetting
Modbus®
setting
Baud Rate = 9600):
Short-circuit JP5 for at least 5 seconds out of
the power-up time (LED L4 fixed green) to reset
the default data communication, this way
bringing it back to normal mode: the occurred
recovery is shown with the lighting of the Red
LED L1 auxiliary for 2 sec.
Pag. 13/32
If the hardware configuration is in use, the
address set in flash will not be considered. The
same function can be activated via Modbus®
writing 1 in COIL-33, followed by the board reset
command (write 1 in COIL-39).
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FUNCTIONAL MAINTENANCE
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The periodical check of the transmitter aims to
verify the correct efficiency both of the basic
functions and the precision of the measurement
(i.e. the current passing through the output in
relation to the measured gas concentration).
The procedure regarding the control with titrated
gas is described in a dedicated paragraph.
Besides the control of concentration value of the
measured gas, it is necessary to periodically
perform the following other operations:
Carefully control the kinds and quantities of
potentially contaminant substances (usually
compounds based on organic solvents) which
may be in the enviroment where the sensor is
installed; the presence of these substances
may alter the operational capability of the
sensor or lead, generally, to a worse
behaviour, or yet require more frequent
calibrations.
Visually inspect each device by which the gas
detection system is made. Pay special
attention to dust, dirt, pollutants, solvents and
accumulation of condensing, which may alter
the operational capability of the sensor.
The frequency with which the inspections and
the recalibration have to be performed, is
under the responsability of the detection
system manager, who must check the
requirements
legislations. For example, in the next section,
there is a summary of what the italian law CEI
31-35 requires:
"The lapse of time between the inspections
and the recalibrations must be set by the user
according to the actual functioning conditions
and to the instructions of the manufacturer;
anyway this must be at least:
- every three months: for systems overseeing
enviroments with first degree emissions (i.e.'
can happen during the normal functioning).
- every six months: for systems overseeing
enviroments with second degree emissions
(i.e. it is unlikely to happen during normal
operation)".
• It is necessary to clean periodically the
equipment to avoid the formation of dust
layers higher than 5mm.
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code
memory
VERIFICATION - Overall view
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By the term 'Verification' is meant the check for the
correct
transmitter
application of a sample gas which concentration is
known and certified and measuring at the same
time the output signal.
In detail, the procedure is articulated in the
following points:
Use of the Zeroing gas
CO
LPG
Verify of the Zero output (4..20mA or
Modbus®)
0
0
Use of the Span gas
Verify of the Span output (4..20mA or
Modbus®)
16
1350
Applicati on
2700
(Combustibles Gases)
Applying the zeroing gas means to put the
transmitter in certainly clean air and verify that
0
500
the output signal indicates a zero concentration.
The transmitter must operate for at least 48
0
1000
hours in clean air and must be placed in its
normal functioning position.
Application of the Span gas (Combustibles
and toxic gases)
(Address=1,
Applying the Span gas means make the
transmitter to be reached by a gas with a known
and certified concentration which value is as
close as possible to the center of the scale
measured by the transmitter.
For the Combustible gases it is mandatory, for
safety reasons, that the gas concentration is
of
the
eventual
national
functioning
through
the
of
the
zeroing
gas
ENGLISH
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