Raytech WR14 Instruction Manual page 52

To view the actual result without the temperature correction, Press the "T" during the measurement:
The "crossed" "T" shows that the displayed
resistance value is NOT corrected.
The corrected AND the uncorrected values are
stored in memory whether or not the correction is
activated in the display.
If the display shows a crossed Red T, the result is
not corrected because a temperature probe is
missing or not recognized by the system.
51 WR14 / WR50-12/13 Winding Resistance Meter Instruction Manual Version 3.03