What is the difference between testing and calibration in a gas detector
After being used for a period of time, the gas detector is easily affected by the use environment and the gas sensor of the instrument itself, which may cause large deviations in the measured results. Therefore, in order to ensure the accuracy of the measurement results, no matter what kind of gas sensor gas detector is used, it needs to be tested regularly. If the deviation of the test result exceeds the normal range, the gas detector needs to be recalibrated. Many friends often confuse testing and calibration, so what is the difference between gas detector testing and calibration?
The difference between gas detector testing and calibration:
(1) Testing refers to the use of a gas detector to detect a gas of known concentration to determine whether the results detected by the instrument are within the acceptable range. If it exceeds the allowable range, the instrument needs to be recalibrated.
(2) Calibration refers to adjusting the result of the gas detector with a gas of known concentration to conform to the concentration of the known gas.
Frequency of gas detector test calibration:
(1) When conditions permit, the gas detector should be tested once a day before use;
(2) For gas detectors that fail to pass the test, they must be calibrated before they can be used;
(3) If the environment under test may affect the performance of the gas detector, the test should be carried out at any time.
If the conditions do not allow daily calibration confirmation, the gas detector can reduce the calibration frequency if the following conditions are met:
(1) At least 10 days of detection have been carried out on specific occasions, and the daily detection results confirm that the gas detector has not been affected by certain gases in the environment and caused gas sensor poisoning.
(2) If it is determined after the test that the gas detector does not need to be calibrated, the calibration interval can be extended, but the longest cannot exceed 30 days.
(3) There should be a special person responsible for the calibration history of the instrument or there should be detailed tracking and use record data files.
