Home Technical Information Resistance Thermometers 5. Basic values for standardised resistances according to DIN EN 60751

Technical Information

5. Basic values for standardised resistances according to DIN EN 60751

For this standard the following connection between temperature and electrical resistance is core fixed:

For the temperature range -200 °C to 0 °C:

Rt = R0 (1 + At +Bt2 + C (t-100°C) t3)

For the range from 0 - 850°C:

Rt = R0 (1 + At + Bt2)

For the platinum quality generally used in the industry the following constants are valid in the equation:

A = 3,9083 *10-3 °C-1
B = -5,775 * 10-7 °C-2
C = -4,183 * 10-12 °C-4

a = (R100- R0)(100 * R0)-1 = and has the value 0,00385°C-1

R100: Resistance at 100°C
R0: Resistance at 0°C

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