Hioki CHT3548, User Manual, Page: 54 / 81

Hope Electronics Technology Manual
Edition
V1.0 54
5.2 Performing Temperature Rise Test (Temperature
Conversion Function (
△
T))
This function converts the change in the winding resistance into a
temperature rise value, based on the temperature conversion principle (p.
Appx.7). It can be used to estimate the temperature of the motor or the inside of
the coil while the power is cut off based on the change in the winding
resistance.
IMPORTANT
(1) After the motor and coil are stabilized at room temperature, measure the
resistance (R1) and instrument ambient temperature (t1), and then input these
values to the instrument.
(2) Disconnect the test lead from the measurement target.
(3) After turning off the power, reconnect the test lead to the measurement
target and then measure the temperature rise value (
△
t 1~
△
tn, ) at the preset
intervals. It can be measured easily if the interval memory function is used.)
(4) Draw a line by connecting the collected temperature data (
△
t 1~
△
tn),
and estimate the maximum temperature rise value (
△
t).
Performing Temperature Rise Test (Temperature Conversion Function
(
△
T))