The calibration certificate for a temperature and humidity meter is a document that certifies that the instrument has been calibrated to a certain standard. The certificate usually contains the following information :1. Instrument model and serial number: Identify the model and serial number of the T/H table to ensure correct identification. 2. Calibration date and location: Record the specific date and location of instrument calibration to determine the effectiveness of calibration. 3. Calibration body information: including the name, address and contact information of the calibration body, as well as possible accreditation or certification information. 4. Calibration methods and equipment: Describe the specific methods and equipment used in the calibration process to ensure the accuracy and repeatability of calibration. 5. Calibration results: indicate the reading of the hygrograph before and after calibration, as well as the calibration error range or deviation. 6 Uncertainty: The uncertainty recorded during calibration is used to determine the confidence of the hygrograph readings. 7. Calibration technician signature and qualification: The calibration technician signs the certificate and provides qualification information to ensure the legitimacy and professionalism of the calibration process. The calibration certificate is an important document to ensure the accuracy and reliability of the temperature and humidity meter readings, which can provide users with the traceability and accuracy of the calibration process.