Panasonic FP-X0 L14R User Manual page 28

2.4.4 Thermister Input
Connect a thermister and resistor to the analog input connector externally to load the change in the
resistance values of thermistor as analog input values.
Circuit diagram
Thermister resistance and digital conversion value
Use the following formula to convert the thermister resistance and digital conversion value.
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Digital conversion values vary between K0 and K1012.
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Thermister resistance (kΩ) = ―――――――― − R (kΩ)
Connected thermister
[Example] R = 2.2kΩ
Thermisters whose resistance is between 200 and 75kΩ can be used.
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Type of thermister (B constant)
3390K
3450K
4300K
5133K
Thermister measurement temperature - A/D conversion table
[Example] Thermister B constant : 3450K, external resistance: R=2.2kΩ
Temperature (°C)
50
60
70
80
90
100
110
120
130
140
150
Note) The digital value does not include (Total accuracy of A/D converter with built-in microcomputer:
±5LSB) + (Thermister accuracy).
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Do not connect anything with the 5/6 and 7/8 pins.
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It is recommended to use approx. 2 kΩ as external resistance.
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1012 x R (kΩ)
Digital value + 1
Thermister resistance (kΩ)
4.3560
3.1470
2.3170
1.7340
1.3180
1.0170
0.7940
0.6277
0.5017
0.4052
0.3305
Reference of measuring range (°C）
-50 to +100 °C
50 to +150 °C
+100 to +200 °C
+150 to +300 °C
Digital value after conversion
344
421
497
573
640
690
752
797
834
865
890