User`s guide

Measurement Tutorial 3
34450A User’s Guide 95
Temperature measurements
The multimeter measures temperature by measuring the
temperature sensitive resistance of 5 kW thermistors.
Thermistors consist of semiconductor materials and provide
roughly 10 times the sensitivity of an RTD. Because they are
semiconductors, their temperature range is more limited,
commonly to
–80 °C to 150 °C. Thermistors have highly
non- linear, temperature- resistance relationships; therefore
their conversion algorithms are more complex. Keysight
multimeters use the standard Hart- Steinhart Approximation
to provide accurate conversions.