I. Introduction

II. Equipment Management

1. Selection and Procurement of Calibration Equipment

• According to the type, accuracy requirement and calibration range of the pressure gauge, select appropriate calibration equipment, such as high-precision pressure sources, standard pressure gauges, etc. When purchasing equipment, pay attention to the quality and performance of the equipment, and choose suppliers with good reputation and reliable after-sales service. At the same time, conduct strict acceptance inspection on the equipment to ensure that the equipment meets the technical requirements and quality standards.

2. Regular Calibration and Maintenance of Equipment

• Formulate a regular calibration plan for the calibration equipment, and send the equipment to a qualified metrology institution for calibration according to the specified cycle to ensure that the accuracy of the equipment always remains within the allowable range. Establish an equipment maintenance file to record the maintenance situation of the equipment, including maintenance records, maintenance records, etc. Regularly maintain and maintain the equipment, such as cleaning, lubricating, inspecting, etc., to extend the service life of the equipment and ensure the normal operation of the equipment.

3. Use and Management of Equipment

• Write detailed equipment operating procedures, and the operators must use the equipment strictly in accordance with the operating procedures. Record the usage situation of the equipment, including the usage time, user, usage status and other information of the equipment. If the equipment fails or malfunctions during use, it should be stopped using in time and repaired and debugged. The storage environment of the equipment should be controlled to ensure that the equipment is stored in a dry, ventilated and suitable temperature environment to prevent the equipment from being damaged by moisture, rust, etc.

III. Personnel Qualification

1. Training and Assessment of Calibration Personnel

• Regularly organize calibration personnel to participate in professional training. The training content includes knowledge and skills in aspects such as the principle of the pressure gauge, calibration method, error analysis, quality control, etc. After the training, the calibration personnel should be assessed, and only those who pass the assessment can engage in the calibration work. At the same time, encourage the calibration personnel to participate in relevant academic exchange activities and technical seminars to continuously update their knowledge and improve their skill levels.

2. Personnel Qualification Certification

• Require the calibration personnel to obtain the corresponding qualification certification, such as the metrology verification personnel certificate. Qualification certification is a recognition of the professional ability and qualification of the calibration personnel, ensuring that the calibration personnel have the legal qualification to engage in the pressure gauge calibration work. Establish a personnel qualification file to record the qualification certificate information, training records and assessment results of the calibration personnel, and conduct dynamic management of the personnel qualification, and timely update and maintain the personnel qualification information.

IV. Calibration Process Control

1. Selection and Confirmation of Calibration Method

• According to the characteristics of the pressure gauge and the customer's requirements, select the appropriate calibration method and confirm the selected calibration method. The confirmation content includes the scientificity, accuracy, reliability and applicability of the calibration method. During the calibration process, the operation must be carried out strictly in accordance with the confirmed calibration method, and it cannot be changed arbitrarily. If it is necessary to adopt a new calibration method or change the existing calibration method, the method confirmation must be carried out again.

2. Control of Calibration Environment

• The calibration environment has an important impact on the calibration results of the pressure gauge. Ensure that the calibration environment meets the requirements of relevant standards and specifications. Environmental factors such as temperature, humidity and vibration should be controlled within the specified range. The calibration laboratory should be equipped with corresponding environmental monitoring equipment, such as temperature and humidity meters, vibration meters, etc., to monitor and record the environmental parameters in real time. If the environmental conditions do not meet the requirements, corresponding measures should be taken to adjust, such as using air conditioners to adjust the temperature and using dehumidifiers to control the humidity, to ensure the stability and compliance of the calibration environment.

3. Recording and Processing of Calibration Data

• During the calibration process, the calibration data should be carefully recorded, including the standard pressure value, the indicated value of the calibrated pressure gauge, the error value, etc. The record should be clear, accurate and complete, and cannot be altered casually. The calibration data should be processed and analyzed in a timely manner to judge whether the calibration result meets the requirements. If abnormal calibration data is found, the cause should be found in time and corresponding measures should be taken to deal with it. The calibration data should be saved in accordance with the specified format and requirements, and the retention period should comply with the relevant regulations for traceability and query.

4. Preparation and Review of Calibration Report

• After the calibration is completed, the calibration report should be prepared in a timely manner. The calibration report should include the basic information of the pressure gauge, the calibration basis, the calibration environment, the calibration data, the calibration result, the uncertainty evaluation and other contents. The calibration report should be in a standard format, complete in content and accurate in conclusion. After the preparation is completed, a special person should review the calibration report, and the review content includes the accuracy, integrity and standardization of the report. The calibration report can be issued only after it is approved.