What is the formula for Thermocouple mV ↔ Temperature (Cold-Junction Compensated)?

Core formula: E(T_hot) = E_meas + E(T_cold), then look up the table. The tool returns results instantly using this formula and the selected parameters.

Thermocouple mV ↔ Temperature (Cold-Junction Compensated)

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Convert thermocouple EMF to temperature for K/J/T/E types with cold-junction compensation — forgetting this step is why a meter reading can be tens of degrees off.

Key points

Thermocouple mV ↔ Temperature (Cold-Junction Compensated): Convert thermocouple EMF to temperature for K/J/T/E types with cold-junction compensation — forgetting this step is why a meter reading can be tens of degrees off. Formula: E(T_hot) = E_meas + E(T_cold), then look up the table. Enter parameters on the DD-CAT IDE online tool page to get results instantly, with a calculation-model diagram that updates with the inputs. Uses ITS-90 reference points every 100°C with interpolation; error stays under 1°C from 0°C to the upper limit. Use the full tables for precision metrology. A common alternative is to measure the terminal temperature with a PT100/DS18B20 and use this tool — far more accurate than assuming 25°C.

Inputs

E(T_hot) = E_meas + E(T_cold), then look up the table

Calculation model (updates with parameters)

Hot-junction temperature	324.5 ℃
Compensated EMF E(T)	13.2330 mV	12.2090 + 1.0240
Cold-junction compensation	1.0240 mV	冷端 25.0℃，≈等于 25.2 ℃
Type / range	K 型 0~1000 ℃

Engineering notes

Uses ITS-90 reference points every 100°C with interpolation; error stays under 1°C from 0°C to the upper limit. Use the full tables for precision metrology.
A common alternative is to measure the terminal temperature with a PT100/DS18B20 and use this tool — far more accurate than assuming 25°C.
Reversed polarity reads strongly negative; compensation cable must match the thermocouple type and polarity at the terminals.

FAQ

What is Thermocouple mV ↔ Temperature (Cold-Junction Compensated) for?: Convert thermocouple EMF to temperature for K/J/T/E types with cold-junction compensation — forgetting this step is why a meter reading can be tens of degrees off.
What is the formula for Thermocouple mV ↔ Temperature (Cold-Junction Compensated)?: Core formula: E(T_hot) = E_meas + E(T_cold), then look up the table. The tool returns results instantly using this formula and the selected parameters.
What engineering notes should I keep in mind when using Thermocouple mV ↔ Temperature (Cold-Junction Compensated)?: Uses ITS-90 reference points every 100°C with interpolation; error stays under 1°C from 0°C to the upper limit. Use the full tables for precision metrology. A common alternative is to measure the terminal temperature with a PT100/DS18B20 and use this tool — far more accurate than assuming 25°C. Reversed polarity reads strongly negative; compensation cable must match the thermocouple type and polarity at the terminals.