Spectrum Controls 2080sc-NTC - Manual (Page 11)

Micro800™ 4 Ch Universal Thermistor Input Module 11
Publication 0100198-01 Rev. A
Temperature in Kelvin is determined by the following formula:
( )
B = User-supplied BETA parameter
R
0
= User-supplied resistance at room temperature (T
0
).
T
0
= (constant) Room temperature (25
˚ C) in Kelvin (298.15).
R = Measured resistance.
After solving for T, it is then converted to Celsius: T - 273.15
Steinhart-Hart
If the Equation is set to Steinhart-Hart, all three COEFF strings are used.
The module uses the following formula to determine temperature:
( ) ( ( ))
A, B, C = Coefficients from thermistor specification.
R = Measured resistance
T = Temperature in Kelvin.
The final result is then converted to degrees Celsius: T - 273.15
The above formula images were copied from Wikipedia:
http://en.wikipedia.org/wiki/Thermistor
Resistance
If the Equation is set to Resistance, all COEFF strings are ignored and
only the actual measured resistance is displayed.
Maximum Range (S1_CFG_CH_n_Params[1])
Minimum Range (S1_CFG_CH_n_Params[2])
Since this module provides general purpose measurements, it is
necessary to know the maximum and minimum displayed values to allow
for status processing of over and under range as well as Raw
Proportional. The thermistor type will determine what the optimal
displayed values are. The displayed reading shall be clipped to these
values. By default, Maximum Range is set to 19016, Minimum Range is
set to 0.