
86
EPSON
S1C60N05 TECHNICAL MANUAL
APPENDIX: TECHNICAL INFORMATION
The following table shows the various values for every 10°C.
Table A.3
Temperature
(
°C)
-30
-20
-10
0
10
20
30
40
50
60
70
103AT Thermistor
R2 resistance (k
)
111.3
67.74
42.45
27.28
17.96
12.09
8.313
5.828
4.161
3.021
2.229
Count value
269
443
706
1099
1670
2481
3608
5147
7209
9930
13459
Linear approximation
coefficient in the specified
temperature range
0.0575
0.0380
0.0254
0.0175
0.0123
0.00887
0.00650
0.00485
0.00368
0.00283
The following example derives a displayed temperature using the
values in the above table.
Example:
Assume the count value after an A/D conversion is 3200. Then, it
is between 3608 and 2481 in the table. As a result the tempera-
ture range is 20° to 30°C.
The count value for the minimum value of the temperature
range: 2481
The count value for the maximum value of the temperature
range: 3608
Then, the linear approximation coefficient of the temperature range
is 0.00887.
As a result, the displayed temperature is derived as follows:
Displayed temperature = (3200 - 2481)
× 0.00887 + 20 (°C) = 26.377 (°C)