6 thermistor resistance – Seiko Instruments LTP F Series User Manual
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3-26
3.6.6 Thermistor
Resistance
The resistance of the thermistor at the operating temperature T
X
(
°C) is determined using the following
equation (7).
Equation (7):
R
X
:
Resistance at operating temperature Tx (
°C)
R
25
:
30 k
Ω ± 5% (25°C)
B:
3950 K
± 2 %
T
X
:
Operating temperature (
°C)
EXP (A) : The Ath power of natural logarithm e (2.71828)
[Rating]
Operating temperature range: -40
°C to +125 °C
1
10
100
0
10
20
30
40
50
60
70
80
90
100
‰ ·
“ x i Ž j
’ïR
’li
‚‹
Ħj
Figure 3-14 Thermistor Resistance vs. Temperature
1
1
R
X
=R
25
× EXP B ×
−
273+T
X
298
Res
is
tanc
e
(k
Ω
)
Temperature (
°C)