The difference between gas detector test and calibration:
(1) The test refers to the use of a gas detector to detect gases of known concentrations 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 if the following conditions are met:
(1) The test has been carried out for at least 10 days on a specific occasion, and the gas detector has not been poisoned due to the influence of some gases in the environment through the daily test results.
(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) The calibration history record of the instrument should be in charge of a special person or there should be a detailed tracking and usage record data file.
