The difference between gas detector test and calibration:
(1) The test 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 re-calibrated.
(2) Calibration refers to adjusting the results of the gas detector with a known concentration of gas to match the known gas concentration.
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 the test, they must be calibrated before they can be used;
(3) If the measured environment may have an impact on the performance of the gas detector, the test should be carried out at any time.
If the conditions do not allow calibration confirmation every day, the gas detector can reduce the calibration frequency under the following conditions:
(1) The test has been carried out for at least 10 days on a specific occasion, and the daily test results confirm that the gas detector is not affected by some gases in the environment, resulting in poisoning of the gas sensor.
(2) If it is determined after testing that the gas detector does not need to be calibrated, the calibration interval can be extended, but the maximum length cannot exceed 30 days.
(3) There should be a special person responsible for the instrument's calibration history record or a detailed tracking and usage record data file.
