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Temperature correction of coil DC resistance
Please Note: IWM does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed below.

Compensation for temperature of coil - DC resistance measurements
The specification for the acceptable DC resistance of a wound product is usually defined at a particular temperature, typically either 20 or 25 degrees Centigrade (°C).
If the ambient temperature at the time that the DC resistance is measured differs significantly from the specified temperature, the result must be corrected in order to be meaningful for quality control purposes.
Coils that have been subjected to thermal stress, e.g. air coils wound with hot air may require 8-12 hours to stabilise.

Enter the actual ambient temperature at the time that readings were taken, and the observed DC resistance of the coil into the yellow cells, and then press the "calculate" button. The blue cell will then show the temperature compensated reading.

25 ° C Nominal
Actual ambient temperature (°C)
Observed DC resistance in Ohms
Corrected DC resistance in Ohms
20 ° C Nominal
Actual ambient temperature (°C)
Observed DC resistance in Ohms
Corrected DC resistance in Ohms

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