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Measurement Tutorial
3
Temperature measurements
The multimeter measures temperature by measuring the temperature sensitive
resistance of 5 k 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.
Keysight 34450A User's Guide
115
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