RS PRO RM-804, Инструкция по эксплуатации, Страница: 65 / 207

MEASUREMENT
13/10/2016 Version No. 001 63
Temperature Conversion
Background
The Temperature Conversion function allows you to determine the
temperature change of a DUT at any given resistance, if the initial
temperature, the inferred zero resistance temperature for the DUT
and the initial resistance of the DUT are known. The displayed
result can also be the extrapolated to calculate the final
temperature (T) or the extrapolated temperature difference (
△
T)*.
Temperature Conversion function works on the following formula:
1 0
2 0
1
2
t t
t t
R
R



Where:
R
2
= resistance @ temperature t
2
R
1
= resistance @ temperature t
1
t
0
= inferred zero resistance temperature in ºC**
t
1
= temperature at R
1
t
2
=temperature at R
2
The temperature conversion function is can be used to determine
the temperature of transformer windings, electric motors, or other
materials where it may not be practical to embed a temperature
sensor.
*(T) Final temperature = t
2
=
△
T +T
A
(T
A
) Ambient temperature = Ambient temperature when R
2
is