Hioki CHT3548, User Manual, Page: 78 / 81

Hope Electronics Technology Manual
Edition
V1.0 78
Appx. 4 on temperature compensation (TC)
Temperature correction converts the value of a resistance that depends on
temperature, such as that of a copper wire, to a resistance value at a particular
temperature to display it.
Resistances Rt and Rt 0 below are the resistance values of the
measurement target (having resistance temperature coefficient at t
0
°C of α t 0)
at t°C and t
0
°C.
Example
If a copper test object (with a resistance temperature coefficient at 20°C of
3930 ppm) measures 100Ω at 30°C, its resistance at 20°C is calculated as
follows:
Reference
IMPORTANT
l The temperature probe detects only ambient temperature; not surface
temperature.
l Before measuring, place the temperature sensor as close to the
measurement target as possible, and allow sufficient time for them to
stabilize at ambient temperature.