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FIC03272 の電気的特性と機能

FIC03272のメーカーはETCです、この部品の機能は「Microprocessor」です。


製品の詳細 ( Datasheet PDF )

部品番号 FIC03272
部品説明 Microprocessor
メーカ ETC
ロゴ ETC ロゴ 




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FIC03272 Datasheet, FIC03272 PDF,ピン配置, 機能
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TECHNICAL INFORMATION FOR FIC03272
Technical Information for FIC03272--microprocessor for
use with TGS4161 in automatic CO2 monitors
The FIC03272 is a microprocessor
for handling signals from the
TGS4161 carbon dioxide sensor.
This microprocessor enables
maintenance-free automation of
the air quality control in buildings
when connected with appliances
such as ventilation fans, air
cleaning systems, etc.
Page
Introduction.........................................................................................2
Features................................................................................................2
Basic Function...............................................................................................3
Pin Arrangement...........................................................................................3
Pin Functions
Pins for the initial setting of operational conditions....................................3
Gas sensor signal Vg input .........................................................................5
Thermistor signal VT input .......................................................................5
Bias signal output......................................................................................5
Manual benchmark reset signal input........................................................5
Sensor signal output....................................................................................5
LED display signal output..........................................................................6
Malfunction signal output.........................................................................6
Benchmark renewal status signal output........................................................6
Line test mode...........................................................................................7
Electrical Circuits for FIC03272........................................................................7
Hardware Specifications....................................................................................12
Revised 06/04
IMPORTANT NOTE: OPERATING CONDITIONS IN WHICH FIGARO SENSORS ARE USED WILL VARY
WITH EACH CUSTOMER’S SPECIFIC APPLICATIONS. FIGARO STRONGLY RECOMMENDS
CONSULTING OUR TECHNICAL STAFF BEFORE DEPLOYING FIGARO SENSORS IN YOUR APPLICATION
AND, IN PARTICULAR, WHEN CUSTOMER’S TARGET GASES ARE NOT LISTED HEREIN. FIGARO
CANNOT ASSUME ANY RESPONSIBILITY FOR ANY USE OF ITS SENSORS IN A PRODUCT OR
APPLICATION FOR WHICH SENSOR HAS NOT BEEN SPECIFICALLY TESTED BY FIGARO.
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TECHNICAL INFORMATION FOR FIC03272
1-3 Two output signals
FIC03272 generates two separate output signals:
a) For calculating CO2 concentrations, a pulse width
modulated (PWM) signal is output.
b) An On/Off signal is generated as a control signal
for devices such as ventilation fans, dampers, etc.
4-1 Pins for the initial setting of operational conditions
To optimize sensor performance, the following pins
are provided for setting operational conditions at the
time of power-on. No change can be made to
operational conditions after the initial setting without
powering off and then repowering the device.
Notes:
1) The microprocessor is designed to assume the
highest value of EMF reading is representative of
400ppm of CO2 (ambient air levels). As a result, an
accurate reading cannot be expected if the sensor is
used in an environment where CO2 constantly exists
at higher concentrations than can be found in a
normal clean environment.
2) This device is not suitable for usage in life saving
equipment.
4-1-1 Input signal for setting the sensor’s initial warm-
up time (Pin No. 10)
Initial warm-up time, which is necessary to stabilize
the sensor’s output signal after an unpowered period,
is set by input of a signal to port R43 (see Table 2).
No signal can be taken from the microprocessor’s
output ports during initial warm-up time.
Setting
Signal Input
"H" "L"
2. Basic Functions
2-1 Initial setting of operational conditions
In order to achieve optimal performance of the sensor,
manual preset of operational conditions is provided.
2-2 Automatic operation
Once power is supplied, an initial warm-up timer is
activated. When the initial warm-up time is finished,
the microprocessor will automatically begin
operation and commence generating the two output
signals mentioned above.
2-3 Line test
The microprocessor has the ability to perform a line
test for checking the functionality of the
microprocessor and the surrounding circuits. This
allows users to eliminate tool testing which is
normally done on the production line after assembly.
Initial warm-up
time (T1)
30 minutes
120 minutes
Table 2 - Initial warm-up time setting (AM-4-4161 default = "L")
4-1-2 Input signals VL and TK for benchmark adjustment
(Pins No. 11 and 12)
The benchmark level is normally set at the lowest
value of the sensor’s signal (Vg), which is considered
as 400ppm of CO2 (ambient levels). The benchmark
level Vg is renewed whenever a lower signal voltage
than the present benchmark level is read from the
sensor (as described in Sec. 1-Automatic calibration).
If the benchmark level Vg is not renewed for a pre-
set period of time (TK), it is automatically adjusted
upward by a pre-set voltage (VL) which corresponds
to an equivalent concentration of CO2. Table 3 shows
the user-determined settings for VL and TK which
can be selected by applying a signal to Ports R50 and
R51 respectively.
3. Pin Arrangement
Pin arrangement of FIC03272 is shown in Figure 1.
4. Pin Functions
The basic pin functions of FIC03272 are shown in
Table 1 (shown on Page 4).
Setting
Benchmark
adjustment level
(VL)
Benchmark
adjustment time
(TK)
Terminal
Symbol Pin No.
Signal input
"H" "L"
R50
11
5ppm
20ppm
equivalent equivalent
R51
12
1 day
7 days
Table 3 - Benchmark adjustment level and timer setting
(AM-4-4161 default = 20ppm equiv. and 1 day)
Revised 06/04
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TECHNICAL INFORMATION FOR FIC03272
concentration readings. The pulse width against a
cycle corresponds to the CO2 concentration as shown
in Figure 2. This pulse width is then converted to an
analog output voltage between 0 ~ 3V by the circuit
(please refer to Sec. 5-4 - CO2 concentration circuit).
4-6-2 Damper control signal output (Pin No. 16)
The output from port R60 is set to “H” under normal
conditions in a clean environment, indicating that the
damper should be closed. When a CO2 reading
exceeds the preset level of the Open Damper
Threshold (Cd1) as shown in Table 2, an “L” signal is
output from port R60 as a signal for opening the
damper. When CO2 drops below the preset level of
the Close Damper Threshold (Cd2), the output from
port R60 returns to an “H” signal for closing a
damper. “H” is also output from port R60 during
initial warm-up time and whenever a malfunction
signal is output.
4-7 LED display signal output (Pin Nos. 18 & 19)
The following LED display signals are output from
port R62 (red LED) and port R63 (green LED):
H
L
AB
C
Approx. 65 msec.
A: [(CO2 concentration) / 3000] x C
B: C - [(CO2 concentration) / 3000] x C
C: approx. 65msec.
Figure 2 - PWM signal for CO2 concentration
continuously from R63 during this period.
4-8 Malfunction signal output (Pin No. 17)
An “H” signal is output from port R61 under normal
operation conditions. When a malfunction is detected on
the benchmark level Vg, an “L” signal is output from port
R61. The following condition would generate a
malfunction signal:
Benchmark level Vg malfunction—when the
benchmark level Vg (gas sensor’s signal) cannot
be adjusted in the range between 25 and 51 counts
at AD converted value within 10 minutes after
the adjustment is started, a malfunction is
considered to have occurred.
4-7-1 Initial warm-up time
During the initial warm-up period (see Sec. 4-1-1),
an alternating H/L signal is output from port R63
every 0.5 seconds, causing the green LED to alternate
between on and off every 0.5 seconds. “L” is output
continuously from R62 during this period.
4-7-2 Normal operation mode
When the CO2 concentration is lower than the preset
threshold level for the damper control (Cd1), “L” is
output from port R62 and “H” is output from the
R63, causing the green LED to be lit continuously.
Conversely, if the CO2 concentration is higher than
the preset threshold level for the damper control
(Cd1), “H” is output from port R62 and “L” is output
from port R63, causing the red LED to be lit
continuously.
4-7-3 Malfunction mode
When a malfunction has been detected (see Sec. 4-8),
an alternating H/L signal is output from port R62
every 0.5 seconds, causing the red LED to alternate
between on and off every 0.5 seconds. “L” is output
The relationship between signal output ports and
their output signals under malfunction mode can be
seen in Table 6.
Because a thermistor is not built into the TGS4161, a
heater breakage detection circuit cannot be used in
conunction with TGS4161.
Terminal
CO2 concentration
signal (R91)
Damper control
signal (R60)
Red LED (R62)
Green LED (R63)
Bias signal (R90)
Signal
“L” signal
“H” signal
Alternate H/L signal
(0.5 sec./0.5 sec.)
“L” signal
Hold the level
Indication
0ppm
Close
On/Off
Off
Off
Table 6 - Malfunction signal
4-9 Benchmark renewal status signal output (Pin No. 26)
When the benchmark level has been renewed, an “L”
signal is output from port R92 for one second to
indicate the status. An “H” signal is normally output
from this port.
Revised 06/04
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FIC03272

Microprocessor

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