Thermal Converters:As we’ve noted, a typical thermoelement (TE) has a rated input voltage of 2 V or less, yet most applications for ac voltage measurement require applied voltages of up to 1000 V. To measure high voltages without destroying the TE, a range resistor is usually placed in the signal path before the TE. For a typical 400 Ω, 5 mA TE, a resistor with a value of 199 600 Ω will allow a 1000 V signal to be applied to the resistor/TE combination. Such a combination of resistor and TE is generally called a thermal voltage converter (TVC). |
Use the links below to continue the tutorial or return to the Introduction - Thermoelements
- Extension of Voltage, Current, and Frequency Ranges - Calibration of Thermal Converters - Return to Introduction Photograph of coaxial thermal voltage converters connected to a tee Contact
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