RTD Tolerance according to IEC751


#1

Tolerance table for types of RTD’s according to IEC751.

Standard DIN EN 60751:2009 (based on IEC 60751:2008) defines Pt100 resistance accuracy Classes AA, A, B and C and corresponding tolerances.

Temperature 1/10 Din (±ºC) 1/5 Din (±ºC) 1/3 Din (±ºC) Class A (±ºC) Class B (±ºC)
-100ºC 0.080 1.160 0.267 0.350 0.800
-50ºC 0.055 0.110 0.183 0.250 0.550
0ºC 0.030 0.060 0.100 0.150 0.300
50"C 0.055 0.110 0.183 0.250 0.550
100ºC 0.080 0.160 0.267 0.350 0.800
150ºC 0.105 0.210 0.350 0.450 1.050
200ºC 0.130 0.260 0.433 0.550 1.300
250ºC 0.155 0.310 0.517 0.650 1.550
300ºC 0.180 0.360 0.600 0.750 1.800
350?C 0.205 0.410 0.683 0.850 2.050
400"C 0.230 0.460 0.767 0.950 2.300

#2

what is mean by 1/10 Din?


#3

Standard DIN EN 60751:2009 (based on IEC 60751:2008) defines Pt100 resistance accuracy Classes AA, A, B and C and corresponding tolerances. Before standard update the most accurate class was A and all definitions more accurate were non-standardized, divided Class B values.

  • 1/3 DIN is a divided value, based on Class B , not applicable over the whole measuring range. This divided accuracy is only defined at the point: 0 °C = ± 0,3/3 °C= ± 0,1 °C. Class B 1/3 DIN is not a standardized class.

  • 1/10 DIN is a divided value, based on Class B , not applicable over the whole measuring range. This divided accuracy is only defined at the point: 0 °C = ± 0,3/10 °C = ± 0,03 °C. Class B 1/10 DIN is not a standardized class.

The standardized Class AA since standard update has made the divided values 1/3 DIN dispensable.