| Input T |
REAL (temperature in °C) |
| RS |
REAL (Resistance at TS °C) |
| TS |
REAL (temperature at RS) |
| Output |
REAL (resistance) |
|
RES_SI calculates the resistance of a SI-resistance sensor from the input values T (temperature in °C) and RS, resistance at TS in °C. In contrast to the modules RES_NI and RES_PT which R0 is given at 0°C, the resistance specified for RS for SI sensors at different temperatures (eg 25°C for KTY10). Therefore, the module has an input for RS and another for TS. |
| The calculation is done using the formula |
|
|
RES_SI = RS + A(T-TS) + B(T-TS)² |
|
A = 7.64E-3 |
|
B = 1.66E-5 |
|
The calculation is suitable for a temperature range of -50 .. +150°C. |
