The following is a systematic plan for the full lifecycle maintenance and management of high and low temperature test chambers, covering professional guidance in three dimensions: preventive maintenance, periodic maintenance, and emergency response:

1、 Construction of graded maintenance system

Second level monthly maintenance (performed on the first day of each month)

Deep care of refrigeration units

Use an electronic leak detector to detect the leakage rate of pipeline welding points (qualification standard: annual leakage rate<3g)

Replace the dry filter cartridge (recommended original accessories, filtration accuracy ≤ 5 μ m)

Supplement refrigerant using quantitative injection method (error controlled within ± 5%)

Heating element efficiency verification

Measurement of resistance stability of electric heating tube with multimeter (fluctuation range<± 2 Ω)

Infrared thermal imager scans the surface temperature uniformity of the heating wire (temperature difference between adjacent areas ≤ 5 ℃)

Dust removal of air duct system

Dismantle the primary/intermediate air filters and blow back the accumulated dust with compressed air in reverse

Wipe the inner cavity wall with a dust-free cloth dipped in alcohol until there are no obvious stains or residues

Intelligent upgrade and transformation

Installing IoT modules to achieve remote monitoring (real-time push of over limit alarm information)

Deploy dual channel redundant temperature control system (automatic switching between primary and backup controllers)

Integrated water consumption statistics function (accurate measurement of water replenishment frequency and dosage)

2、 Special working condition response strategy

Key points for operating in extremely cold environments

When the studio temperature is below -40 ℃:

① Preheat the lubricating oil to above 30 ℃ before starting (to prevent the compressor from freezing due to oil solidification)

② Perform a defrosting cycle every 4 hours of operation (duration=cumulative working time x 15%)

③ The sample loading capacity shall not exceed 70% of the volume (with sufficient reserved return air channels)

Special measures for high-temperature aging

When working continuously above+150 ℃:

Replace the silicone sealing strip every week (ordinary rubber accelerates hardening failure at this temperature)

Monthly verification of the integrity of the coating layer on the glass observation window (to prevent local overheating and bursting)

Establish an independent heat dissipation and exhaust system (to export the heat from the chassis to the outside)

3、 Construction of long-term management mechanism

Digital Archive Management

Establish a device health evaluation model (collecting 12 characteristic parameters such as current, voltage, noise, etc.)

Using blockchain technology to store maintenance records (tamper proof timestamp logs)