3.5. Offset Compensation
Offset compensation changes the offset register value from the temperature sensing chip to eliminate the calculated error. To use this feature, you must perform a temperature profile study and identify the offset value to apply.
You must collect temperature measurements across the desired temperature range with the default settings of the temperature sensing chip. Afterward, perform data analysis as in the following example to determine the offset value to apply. Intel recommends that you test several temperature sensing chips with several remote temperature diode to ensure that you cover the part-to-part variations. Then, use the measurements average in the analysis to determine the settings to apply.
You can select the temperature points to test based on your system operation condition.
Application of Offset Compensation
In this example, a set of temperature measurements was collected with three temperature points. Apply Equation 5 to the values and calculate the offset factor.
|Set Temperature||Measured Temperature|
|100°C||373.15 K||111.06°C||384.21 K|
|50°C||323.15 K||61.38°C||334.53 K|
|0°C||273.15 K||11.31°C||284.46 K|
Use the middle point of the temperature range to calculate the offset temperature. In this example, the middle point is the 50°C set temperature.
Apply the offset temperature value and other compensation factors, if required, into the temperature sensing chip and retake the measurement.
|Set Temperature||Measured Temperature||Error|
Did you find the information on this page useful?