1. Regular calibration: Ensuring detection accuracy (core step)

Calibration frequency: Follow the equipment manual requirements. Under normal circumstances, it is recommended to calibrate portable detectors every 3-6 months and fixed detectors every 6-12 months; If the detection environment is harsh (such as high dust, high humidity) or high concentration gases are frequently detected, it should be shortened to once every 1-3 months.

Calibration method: Priority should be given to using the "two-point calibration method" (zero point calibration+standard gas calibration), using a standard gas that matches the detection gas (such as 100ppm standard CO gas for detecting carbon monoxide), and completing the operation through the equipment's built-in calibration function. After calibration, the calibration date, standard gas concentration, calibration results, and other information should be recorded.

Calibration exception handling: If the error after calibration exceeds the allowable range (usually ± 5%), it is necessary to check whether the sensor is aging and whether the air path is blocked. If necessary, contact the manufacturer to replace the sensor or perform professional maintenance. Uncalibrated equipment should not be used again.

2. Daily cleaning: prevent component contamination

Appearance cleaning: After daily use, use a clean soft cloth dipped in a small amount of water (or neutral cleaning agent, such as alcohol) to wipe the device casing, display screen, and buttons to remove surface dust and oil stains; Avoid using corrosive cleaning agents (such as strong acids and alkalis) to prevent damage to the casing or screen.

Air path cleaning: Regularly (such as once a month) check the air inlet and dust filter. If the dust filter is found to be blocked (with obvious dust or foreign objects), it needs to be removed and blown back with compressed air (pressure ≤ 0.3MPa), or replaced with a new dust filter; Do not use sharp objects to clean the air inlet to avoid damaging the air path seal.

Sensor cleaning: If the sensor of the portable detector is exposed, gently wipe the surface with a dry cotton swab (only applicable to cleanable types), and do not touch the sensor core components with water or touch them; Fixed sensors require regular inspection of the protective cover to ensure its integrity and prevent direct intrusion of dust and moisture.

3. Component maintenance: replace vulnerable parts in a timely manner

Battery maintenance: The rechargeable battery of the portable detector needs to be charged according to the instructions (usually fully charged, avoid overcharging for more than 12 hours). When not in use for a long time (more than 1 month), it should be fully charged before storage, and recharged every 3 months to prevent the battery from being depleted and scrapped; If the battery life is significantly reduced (less than 50% of the rated time), it is necessary to replace the original battery of the same model in a timely manner.

Sensor replacement: Sensors have a fixed service life (usually 1-3 years, depending on the gas type and frequency of use). When the device prompts "sensor aging" or the detection accuracy continues to decline, it is necessary to replace the original factory adapted sensor. After replacement, it must be recalibrated before use; When replacing, the device power should be turned off to avoid static electricity damaging the new sensor.

Seal inspection: Regularly (every 3 months) inspect the sealing strips of the equipment's outer shell and the sealing gaskets of the gas path interface for aging and cracking. If there is any damage, it should be replaced in a timely manner to prevent external gas infiltration from affecting the detection results. Especially when detecting toxic and harmful gases, seal failure may lead to distorted detection data.

4. Storage management: Avoid environmental damage

Storage environment: The device needs to be stored in a dry, ventilated, and non corrosive gas environment, with a temperature controlled between -10 ℃ -40 ℃ and a relative humidity of ≤ 80%; Do not store in direct sunlight, high temperature and humidity (such as bathrooms, kitchens), or places with strong vibrations to avoid damage to display screens, sensors, or circuit components.

Portable device storage: For portable detectors that are not used for a long time, the battery (if removable) should be removed and stored separately. The device and battery should be placed in moisture-proof bags separately; Before storage, it is necessary to ensure that the equipment is cleaned and turned off to avoid accidentally pressing buttons and consuming electricity.

Fixed equipment maintenance: Fixed detectors need to be regularly checked for secure installation brackets and loose cable connections. If installed outdoors, it is necessary to confirm that the rain and sun protection covers are intact to prevent rainwater from entering the equipment and causing short circuits.