Pressure gauge measuring instruments internal calibration procedures
Release time:
2024-05-30 14:22
Source:
I. Purpose of operation.
The purpose of this internal calibration operation is to check the accuracy and reliability of the pressure gauge measuring instruments to ensure that it meets the requirements of national and industry standards.
and industry standards, to ensure the accuracy and reliability of the test and measurement results.
Second, the scope of the operation
The scope of this internal calibration operation includes pressure gauges and pressure reducers of pressure gauges.
Operation Procedure
1.Preparation
(1) Preparation of calibration equipment: such as through the external calibration of qualified pressure gauges.
(2) Prepare calibration record forms: record calibration results and records.
(3) Check the pressure gauge measuring instruments: check whether the pressure gauge measuring instruments work properly to ensure that it can be calibrated properly.
(4) calibration frequency: pressure gauge calibration cycle does not exceed one year.
(5) Calibration environment: calibration of the ambient temperature of 20 ½ ° C, humidity less than 85%.
2. Calibration operation
(1)Use the standard pressure gauge or calibration instrument to generate a series of different pressure values of the test point, covering the entire pressure gauge measurement range, record the pressure value of the test point.
Record the pressure values and measurement results of the test points.
(2) Connect the gauge to the calibration instrument or standard gauge, measure and record.
(3) Analyse and compare the measurement results, determine the error and uncertainty of the pressure gauge, and calculate its accuracy and measurement range.
measurement range.
(4) According to the error and uncertainty, the pressure gauge is adjusted and calibrated to meet the predetermined accuracy and precision requirements.
accuracy requirements.
(5) After completing the calibration and adjustment, carry out the final check and confirmation, record the calibration results and process, and fill in the relevant calibration records and reports.
calibration records and reports.
3. Evaluation of calibration results
(1) Evaluate whether the calibration results meet the requirements according to the industry standards and usage requirements.
(2) If the calibration results do not meet the requirements, it is necessary to make adjustments and calibrate again until it meets the requirements.
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Pressure gauge measuring instruments internal calibration procedures
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