Answer :
Final answer:
Fixed gas detectors should be calibrated when first installed and regularly thereafter to ensure their accuracy and reliability. Calibration helps ensure safe operation, especially in environments with hazardous gases. Regular maintenance is crucial for effective monitoring.
Explanation:
Calibration of Fixed Gas Detectors
Fixed gas detectors are crucial safety devices used in various industries to monitor the presence of hazardous gases. To ensure their accuracy and reliability, it is important to calibrate these devices appropriately.
When Should Calibration Occur?
According to industry standards, fixed gas detectors should be calibrated when first installed and regularly after installation. This helps to ensure that the detectors are functioning correctly and can provide accurate readings. Calibration is typically performed according to the manufacturer’s recommendations, which may suggest intervals such as every six months or annually based on usage and environmental conditions.
- Example 1: If a gas detector was installed in a chemical plant, it would be calibrated upon installation and regularly (such as every six months) during routine maintenance checks.
- Example 2: A detector that has been exposed to significant changes in its environment, such as temperature or humidity, may require more frequent calibration.
It is incorrect to calibrate a detector immediately after it generates an alarm (option c), as this does not allow for an understanding of whether the alarm was due to a malfunction or an actual gas presence. Calibration should not be done at the convenience of employees (option d), as this could lead to lapses in safety protocols.
Therefore, the best practice is to choose option b: When first installed and regularly after installation.
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