The calibration of thermo-hygrometers is an important task as it can ensure the accuracy and reliability of the measurement results of thermo-hygrometers. The following are the methods and steps for calibrating thermo-hygrometers.
I. Preparation
Select appropriate calibration equipment: Usually, a standard thermo-hygrometer or a precision temperature and humidity generator is used as calibration equipment.
Ensure a stable calibration environment: Calibration should be carried out in an environment with stable temperature and humidity to avoid the influence of external factors on the calibration results.
Prepare the thermo-hygrometer to be calibrated: Ensure that the appearance of the thermo-hygrometer is intact and there is no damage or malfunction.
II. Calibration steps
Connect the calibration equipment and the thermo-hygrometer to be calibrated: Place the calibration equipment and the thermo-hygrometer to be calibrated in the same environment and ensure that they can accurately measure the temperature and humidity of the environment.
Set calibration points: According to needs, select different temperature and humidity points for calibration. Generally, several commonly used temperature and humidity values can be selected as calibration points.
Perform calibration: At each calibration point, let the calibration equipment and the thermo-hygrometer to be calibrated stabilize for a period of time, and then record their readings. By comparing the readings of the calibration equipment and the thermo-hygrometer to be calibrated, calculate the error.
Adjust the thermo-hygrometer: If an error is found in the thermo-hygrometer to be calibrated, the thermo-hygrometer can be adjusted according to the magnitude and direction of the error. The adjustment method can refer to the user manual of the thermo-hygrometer.
Repeat calibration: After adjustment, perform calibration again until the error of the thermo-hygrometer to be calibrated is within the allowable range.
III. Recording and reporting
Record all data during the calibration process, including the readings of the calibration equipment, the readings of the thermo-hygrometer to be calibrated, and the error.
Write a calibration report. The report should include the calibration date, information about the calibration equipment, information about the thermo-hygrometer to be calibrated, and the calibration results.
Mark the calibrated thermo-hygrometer to indicate the calibration date and calibration results.
In conclusion, the calibration of thermo-hygrometers needs to be taken seriously and operated in accordance with correct methods and steps to ensure the accuracy and reliability of thermo-hygrometers.
