Basics about Calibration of Thermocouple for Temperature Measurement
Techniques of Calibration of Thermocouple for Temperature Measurement
Check Out Heatcon’s Thermocouple Range
Thermocouples are widely used in various industries wherein different applications require temperature measurement. They are preferred due to their simplicity, durability, and wide temperature range capability. However, to ensure accurate & reliable temperature readings, it is crucial to calibrate thermocouples periodically. Calibration of thermocouple for temperature measurement helps identify & correct any deviations or inaccuracies in temperature measurements, ensuring the proper functioning of thermocouples and maintaining measurement integrity.
Different Thermocouple Types
Thermocouples are available in various types, each suitable for specific temperature ranges & applications. Some common ones are specified beneath:
- Type K: This is the most widely used one, capable of measuring temperatures ranging from -200°C to +1350°C. It is known for its high accuracy & versatility.
- Type J: This type is suitable for measuring temperatures from -210°C to +1200°C. It exhibits good sensitivity but has a smaller temperature range compared to Type K.
- Type T: With a temperature range of -200°C to +350°C, Type T thermocouples are often used in low-temperature applications. They offer excellent accuracy & stability.
- Type E: These thermocouples have a temperature range of -200°C to +900°C and are commonly used in high-temperature applications. They exhibit high accuracy & resistance to oxidation.
- Type N: Suitable for temperatures ranging from -200°C to +1300°C, Type N thermocouples provide good accuracy & resistance to high-temperature oxidation.
Basics about Calibration of Thermocouple for Temperature Measurement
Calibration is the process of comparing the output of a measuring thermocouple to a known reference value. By calibrating thermocouples, we can determine their accuracy, identify any measurement deviations, and make necessary adjustments or corrections. The calibration process involves measuring the output of the thermocouple at various known temperatures and creating a calibration curve or table to relate the measured values to the actual temperatures.
Techniques of Calibration of Thermocouple for Temperature Measurement
- Ice Point Calibration: This method involves immersing the thermocouple junction in a bath of melting ice and water. At this point, the thermocouple should read 0 degrees Celsius (32 degrees Fahrenheit). If there is any deviation, the thermocouple can be adjusted, or the temperature reading can be corrected accordingly.
- Boiling Point Calibration: In this technique, the thermocouple junction is immersed in boiling water. At sea level, this should correspond to a temperature of 100 degrees Celsius (212 degrees Fahrenheit) at atmospheric pressure. Similar to the ice point calibration, any deviations can be corrected.
- Comparison to Reference Standards: This method involves comparing the thermocouple output to a calibrated reference thermometer or temperature standard. The reference device provides accurate temperature readings, and any differences observed in the thermocouple measurement can be noted and adjusted for calibration.
About the Calculations
Keep in mind that different thermocouple types have different voltage-temperature relationships, so it is crucial to use the appropriate method for the specific thermocouple type being calibrated.
Check Out Heatcon’s Thermocouple Range
Calibration of thermocouples for temperature measurement happens to be an essential process for ensuring accurate temperature measurement using thermocouples. Regular calibration is recommended to maintain measurement integrity and achieve reliable temperature readings. Purchase your pick from Heatcon and go through their guidelines & specifications for specific calibration procedures & equations based on the thermocouple type that you are buying.
