E+E Elektronik THERMOPORT 20 Manuel page 34

Manual
Important: the determination of the
coefficients A,B,C and R0 must only be
carried out by accredited laboratories.
Calibration of the PT100 channel by means of coefficients
CAL1 LH: Every characteristic curve of a PT100 sensor can be
defined by a polynomial. Polynomials are used for minimizing errors
and non-linear behaviour of a sensor element.
For temperatures -200°C...0°C
PT100 corresponds to the following polynomial:
Rt = R0 [1 + At + Bt² + C(t-100°C) t³]
For temperatures > 0°C the polynomial is:
Rt = R0 [1 + At + Bt²]
Rt is the resistance at temperature t, R0 resistance at temperature
0°C. A,B and C are coefficients of the polynomial equation.
In menu CAL1 LH these coefficients as well as the value R0 can
be set.
THERMOPORT 20 english
the characteristic of a
(-328...32°F)
page 34