What is the difference between testing and calibration in a gas detector?
After a period of time, the gas detector is easily affected by the environment in which it is used and the gas sensor of the instrument itself, which may lead to a large deviation in the measured results. Therefore, in order to ensure the accuracy of the measurement results, so no matter what kind of gas sensor is used in the gas detector, it is necessary to carry out regular testing, if the test results deviate from the normal range, then the gas detector needs to be recalibrated. There are a lot of friends often test and calibration of the two confused, so what is the difference between the gas detector test and calibration?
Gas detector test and calibration of the two differences:
(1) test refers to the gas detector to detect a known concentration of gas to determine whether the results detected by the instrument is within the acceptable range, if out of the permissible range, only need to recalibrate the instrument.
(2) Calibration refers to the use of a known concentration of gas to adjust the results of the gas detector to match the concentration of the known gas.
Frequency of gas detector test calibration:
(1) Where conditions permit, gas detectors should be tested once a day just before use; and
(2) Gas detectors that fail a test must be calibrated before use.
(3) If the environment under test may have an effect on the performance of the gas detector, then the test should be carried out at any time.
If the conditions do not allow daily calibration confirmation, then the gas detector can be calibrated less frequently if the following conditions are met:
(1) At least 10 days of testing have been conducted at a specific site, and it has been confirmed through daily test results that the gas detector has not been affected by certain gases in the environment that cause poisoning of the gas sensor.
(2) If it is determined after testing that the gas detector does not need to be calibrated, then the calibration interval may be extended, but *not* for more than 30 days.
(3) The calibration history of the instrument should be recorded by a person in charge or have a detailed track record of the use of data files.
