Thermometer Calibration at Zenith Sales & Calibration

Thermometers are crucial for various applications, from industrial processes to medical settings. Accurate temperature measurement is vital for safety, quality control, and compliance with regulations. At Zenith Sales & Calibration, we ensure that your thermometers are calibrated to the highest standards. Here’s a detailed step-by-step process for thermometer calibration:


1. Initial Inspection
• Visual Inspection: Check the thermometer for any physical damage, wear, or contamination that could affect its performance.
• Functionality Check: Ensure that the thermometer powers on and functions correctly. Verify that all display segments are operational.
2. Selection of Reference Standards
• Precision Reference Thermometers: Use high-accuracy reference thermometers that are traceable to national or international standards.
• Calibration Baths/Chambers: Employ calibration baths or temperature chambers to provide stable and uniform temperatures for calibration.
3. Preparation of Calibration Environment
• Controlled Environment: Conduct calibration in a controlled environment where temperature and humidity are monitored and maintained within specified limits.
• Stabilization: Allow the thermometer and reference standards to stabilize in the calibration environment to avoid temperature fluctuations affecting the readings.
4. Calibration Procedure
a. Ice Point Calibration (0°C)
• Ice Bath Preparation: Prepare an ice-water mixture to create a stable 0°C environment. Ensure the ice bath is well-mixed and contains plenty of ice.
• Immerse Thermometer: Insert the thermometer and reference thermometer into the ice bath, ensuring proper immersion depth and avoiding contact with the container’s sides.
• Stabilization and Reading: Allow the thermometers to stabilize, then record the readings. Compare the thermometer's reading with the reference thermometer.
b. Boiling Point Calibration (100°C)
• Boiling Water Preparation: Boil distilled water to create a stable 100°C environment. Ensure the boiling point is corrected for atmospheric pressure.
• Immerse Thermometer: Insert the thermometer and reference thermometer into the boiling water, ensuring proper immersion depth and avoiding contact with the container’s sides.
• Stabilization and Reading: Allow the thermometers to stabilize, then record the readings. Compare the thermometer's reading with the reference thermometer.
c. Intermediate Points Calibration
• Calibration Bath Setup: Set the calibration bath or temperature chamber to various intermediate points within the thermometer's range.
• Immerse Thermometer: Insert the thermometer and reference thermometer into the bath or chamber.
• Stabilization and Reading: Allow the thermometers to stabilize at each point, then record the readings. Compare the thermometer's reading with the reference thermometer at each point.