Operation steps of high and low temperature test box

1. Preparation Before Testing

• Check Equipment Status:
  • Ensure the test box is clean and free of debris or 残留 (residues).
  • Verify that all electrical connections are secure and the power supply is stable.
  • Confirm that the temperature sensors and controllers are calibrated according to manufacturer guidelines or industry standards (e.g., ISO, IEC).
• Set Test Parameters:
  • Define the target temperature range (e.g., -40°C to +150°C), ramp rate (temperature change speed), and dwell time (stabilization period at each setpoint).
  • Input the test profile into the controller (e.g., linear ramping, stepwise changes, or cyclic programs).
• Prepare Test Specimens:
  • Mount samples securely on the test rack to allow airflow circulation.
  • Ensure samples do not touch the chamber walls to prevent thermal gradients.

2. Start-Up and Operation

• Power On the System:
  • Turn on the main power switch and allow the controller to initialize.
  • Enter the user interface to confirm programmed parameters.
• Initiate the Test:
  • Start the test cycle and monitor the temperature progression via the display or connected software.
  • Record initial conditions (e.g., time, temperature, humidity if applicable).
• Monitor During Testing:
  • Regularly check the chamber’s temperature stability and ensure no alarms are triggered (e.g., over-temperature, sensor failure).
  • Avoid opening the chamber door during testing to maintain uniform conditions.

3. Post-Test Procedures

• Terminate the Cycle:
  • Once the test completes, stop the program and allow the chamber to return to ambient temperature (if required).
  • Record final data, including any observations of sample behavior (e.g., deformation, condensation).
• Remove Samples:
  • Use heat-resistant gloves to handle samples if the chamber is still hot.
  • Inspect samples for physical or functional changes.
• Shut Down the System:
  • Turn off the power and clean the chamber if necessary.
  • Store the test box in a dry, well-ventilated area.

4. Safety Precautions

• Avoid Direct Contact:
  • High/low temperatures can cause burns or frostbite. Use protective gear when handling samples or performing maintenance.
• Ventilation:
  • Ensure proper exhaust for chambers with cooling systems to prevent refrigerant leaks.
• Emergency Stop:
  • Familiarize yourself with the emergency shutdown procedure in case of malfunctions.

5. Maintenance Tips

• Regular Calibration:
  • Calibrate sensors and controllers annually or as recommended by the manufacturer.
• Filter Cleaning:
  • Clean or replace air filters to maintain airflow efficiency.
• Leak Checks:
  • Inspect seals and gaskets periodically to prevent temperature inconsistencies.