What should we pay attention to when using a thermal shock test chamber (water-cooled)?

I. Before Operation

• Use deionized water or distilled water as cooling water (to prevent scale formation); control temperature at 15-30℃, pressure at 0.15-0.3MPa, flow rate ≥5L/min. Clean the Y-type filter element in advance to ensure unobstructed water flow.
• Inspect water supply/drainage pipelines for secure connections, no leakage or kinking; keep drainage ports unobstructed with a height difference ≥10cm. Ensure the environment is ventilated and dry, grounding resistance ≤4Ω, and power supply (AC380V±10%) stable. Keep the inner chamber and shelves clean.
• Sample volume ≤1/3 of effective capacity, with weight evenly distributed on shelves. Seal moisture-sensitive parts of non-hermetic samples to avoid condensation affecting test accuracy.

II. During Operation

• Real-time monitor cooling water pressure, flow rate and temperature. Immediately shut down for troubleshooting (pipeline blockage, leakage or chiller failure) if pressure drops sharply, flow is insufficient or temperature exceeds 35℃.
• Set high/low temperature parameters per GB/T, IEC and other standards (not exceeding rated range); control heating/cooling rate ≤5℃/min. Prohibit instantaneous switching between extreme temperatures.
• Do not open the door arbitrarily during operation (to prevent scalding/frostbite from hot/cold air). Use protective gloves for emergency sample handling. Shut down immediately for maintenance upon alarm (overtemperature, water shortage, etc.); prohibit forced operation.

III. After Test

• Turn off power and cooling water inlet/outlet valves; drain residual water in pipelines. Clean the water tank and replace water monthly; add special water stabilizer to extend pipeline service life.
• Wipe the inner chamber and shelves after temperature returns to room temperature. Clean the air filter (1-2 times monthly); inspect pipeline seals and replace aging/leaking ones promptly.
• For long-term non-use: Power on and run for 30 minutes monthly (including water cooling system circulation), inject anti-rust protection fluid into pipelines, and cover the equipment with a dust cover in a dry, ventilated place.

IV. Prohibitions

• Prohibit using unqualified water (tap water, well water, etc.) or blocking filters/drainage ports (to avoid affecting heat dissipation).
• Prohibit overloading samples or unauthorized disassembly/modification of water cooling pipelines/core components. Repairs must be performed by professionals.
• Prohibit frequent start-stop (wait ≥5 minutes after shutdown before restarting). Prohibit placing flammable, explosive or corrosive substances.