As the core equipment for environmental monitoring, the measurement accuracy and operational stability of temperature and humidity transmitters directly affect the quality of data acquisition. A scientific maintenance system needs to cover three major aspects: daily inspections, periodic maintenance, and abnormal handling. The following will elaborate on the key dimensions.
1、 Daily basic maintenance
1. Physical state check
Observe the appearance of the equipment daily for signs of deformation, cracking, or corrosion, with a focus on checking whether the wiring terminals are loose and whether the cable sheath is damaged. For wall mounted equipment, it is necessary to confirm that the installation bracket is stable to avoid displacement caused by vibration. If the device is equipped with a display screen, it should be checked regularly to ensure that the data refresh is normal and there are no garbled or black screen phenomena.
2. Filter cleaning
For models with dust filters, use compressed air (pressure ≤ 0.2MPa) to blow the filter element from the inside out every week to remove dust accumulation. If the filter is clogged, it will cause poor airflow, resulting in measurement values lagging behind actual environmental changes. Under severe pollution conditions, cleaning can be shortened to once every 3 days.
3. Surface dust removal
Use an anti-static brush to clean the floating dust on the surface of the sensor probe, and do not touch sensitive components directly with your hands. For air ducts with louver structures, a small vacuum cleaner can be used at a low level to remove internal dust accumulation.
2、 Special scenario response strategies
1. Protection against high humidity environments
In humid areas with RH>85%, it is recommended to install waterproof and breathable membranes and choose models with automatic defogging function. Check monthly for copper green oxidation at cable joints and replace gold-plated connectors if necessary.
2. Chemical gas interference suppression
In scenarios where VOCs or acidic gases are exposed, activated carbon filters should be installed at the sampling port and failed filter materials should be replaced regularly. For corrosive environments, it is recommended to use 316L stainless steel probes.
3. Rapid temperature adaptability optimization
In areas with intense alternation between hot and cold (such as at the entrance of a cold storage), a measurement delay time (about 30 seconds) can be set, and data can be recorded after the environment stabilizes. At the same time, add a radiation shielding cover to reduce thermal radiation errors caused by temperature differences.
3、 Storage and Transportation Standards
1. Long term idle storage
After the power is cut off, remove the battery and place the device in an anti-static bag. Store it in a drying oven with a temperature of around 20 ± 5 ℃ and a humidity of about 50%. Perform a functional self check once every quarter when powered on.
2. Transportation protection
Foam cushioning materials are used to fix the equipment to avoid vibration and shock during transportation. Before long-distance transportation, it is necessary to lock the mechanical structure to prevent calibration deviation caused by transportation bumps.
The maintenance of temperature and humidity transmitters requires the establishment of a "prevention oriented, data-driven" management mechanism. By combining standardized operating procedures (SOP), equipment health records, and predictive maintenance systems, the failure rate can be effectively reduced and equipment lifespan can be extended. Suggest developing an annual maintenance calendar, combined with historical data and big data analysis, to achieve a transition from passive maintenance to active control.