Raytech WR14-R Instruction Manual page 65

The correction formula:
Rs = Rm
Rs Resistance corrected
Rm Measured resistance
Ts Desired reference temperature
Tm The temperature at which resistance was/is measured
Tk 234.5 for copper
225.0 for aluminum
(aluminum may be as high as 240)
Alternative: Correction with "alpha25" to calculate Tk with the formula:
Tk =
alpha25
When Temperature correction is activated the Main Test screen appears as below:
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14
Ts + Tk
Tm + Tk
1
− 25
The "T" in the measuring channel box shows
that the displayed resistance value is corrected.
In this example it is corrected to 25 °C using Tk
of Copper and referring to Temperature probe 1.
Page 65 of 139