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參數(shù)資料
| 型號(hào)： | FIC03272 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Microprocessor for handling signals from the TGS4161 carbon dioxide sensor |
| 中文描述： | 微處理器處理的TGS4161二氧化碳傳感器信號(hào) |
| 文件頁(yè)數(shù)： | 7/14頁(yè) |
| 文件大?。?/td> | 366K |
| 代理商： | FIC03272 |
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Revised 06/04
7
TECHNICAL INFORMATION FOR FIC03272
4-10
Line test mode (Pin No. 4)
A line test mode can be activated by the input of an
“L” signal to port R70 at the moment of power supply.
Operation of the microprocessor and the surrounding
circuits will be tested according to the schedule
shown in Table 7. After powering on, signal outputs
change from Step 1 to Step 4 according to the table,
with Steps 1-3 lasting 5 seconds each. Afterwards,
Step 4 outputs will be maintained continuously until
the power is shut off.
l
n
m
r
T
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p
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m
a
N
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b
m
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.
N
n
1
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2
p
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3
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4
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2
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1
9
R
5
2
)
m
1
p
*
p
1
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m
p
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1
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C
)
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p
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C
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2
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0
9
R
4
2
0
5
5
2
8
2
1
8
2
1
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3
6
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9
1
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H
(
3
e
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)
H
D
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d
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R
2
6
R
8
1
H
L
(
4
e
N
)
H
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c
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p
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D
0
6
R
6
1
H
L
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5
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)
H
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o
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1
6
R
7
1
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L
(
6
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H
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H
H
Notes:
(1) Please refer to
Sec. 4-1-4 - Input signal for damper control
(2) Please refer to
Sec. 4-4 - Bias signal output
(3) H or L, as input to Pin #10 for initial warmup setting - refer to
Sec. 4-1-1
(4) H or L, as input to Pin #11 for benchmark adjustment - refer to
Sec. 4-1-2
(5) H or L, as input to Pin #12 for benchmark adjustment - refer to
Sec. 4-1-2
(6) H or L, as input to Pin #13 for benchmark reset - refer to
Sec. 4-1-3
(7) Outputs shown are held until power is shut off
Table 7 - Line test mode
5. Electrical Circuit for FIC03272
The following peripheral circuits are suggested when
using the FIC03272 with the TGS4161 sensor.
5-1
Circuit for driving sensor and for processing sensor signals
The block/circuit diagrams for driving the sensor and
processing its signals are shown in Figure 3 (below)
and Figure 4 (Page 8) respectively. Please note the
following items:
a) +5.0V should be applied to Pin No. 6 for the heater
of TGS4161.
b) +3.8V is the specified voltage to sensor pin No. 5
for the built-in thermistor which is connected in
series with an 8.2k
resistor. Output voltage across
the 8.2k
resistor is designed to be input to port
Thermistor
signal (V
T
)
FIC03272
Heater
voltage
(V
H
)
Sensor
voltage
(EMF)
Buffer
circuit
4.5 times
amplification
circuit
+3.8V
+5V
Regulation
circuit
Bias signal (PWM signal)
Convert to DC
Buffer
circuit
+
10 times
amplification
circuit
+
Figure 3 - Block diagram for driving sensor and processing sensor signal
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