Infant warmer is one of the electromedical devices used to provide comfort and warmth to newborns, where the baby needs a temperature that is in accordance with the temperature in the mother's womb, which is between 34oC – 37oC. The purpose of this research is to study the Calibration technique and the calculation of the uncertainty of temperature measurement data.The results obtained from the calibration and calculations are ± 0,54oC for temperature. From these results, it was stated that the infant warmer was declared fit for use. As a rule, the test pass threshold value is ± 2 oC for temperature.
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