Q1: Equipment fails to start / No power supply?

• Check the plug connection and test with a different socket.
• Replace with a fuse or power cord of the same specification.
• Contact professional personnel to inspect the circuit.

Q2: Temperature fails to rise or rises slowly

• Reset the temperature and confirm that the heating function is activated.
• After powering off, check the continuity of the heating element (using a multimeter) and replace the damaged element.

Q3: Temperature fails to drop or drops slowly

• Check if the temperature control refrigeration connection wires are properly connected.
• Add liquid nitrogen.
• Use an air pump to blow the liquid nitrogen capillary, or set a negative temperature with the temperature control software and then blow the capillary with the liquid nitrogen silicone tube outlet.
• Check if the liquid nitrogen-related pipelines are unobstructed.

Q4: Large temperature fluctuation or instability

• Recalibrate the PID parameters of the temperature controller.
• Maintain a stable ambient temperature.
• Check the sensor line shielding and connections, and eliminate interference sources.

Q5: Uneven temperature distribution on the hot stage surface

• Replace the damaged heating element or reposition it.
• Clean the stage surface (polish the oxide layer with fine sandpaper) to ensure it is flat.

Q6: Temperature controller displays "BAD"

• Sensor inspection: Use a multimeter, set it to the resistance measurement range, and short-circuit the four pins of the temperature control interface in sequence with two test leads to check if any of them has a resistance of approximately 100Ω (the sensor resistance is roughly 100Ω). If detected, the sensor is normal.
• Temperature control wire inspection: Connect the temperature control wire to the hot-cold stage, and check the resistance of the temperature control wire as described above.