As a core equipment in the field of precision temperature control, Putec's cooling cycle is widely used in scenarios such as semiconductor testing, biopharmaceuticals, and new energy battery testing.The operating procedures cover four major aspects: equipment inspection, parameter setting, operation monitoring, and maintenance. Technical specifications must be strictly followed to ensure system stability and reliability of experimental data.

　　1、 Pre operation check: Dual verification of safety and performance

Before starting, a comprehensive inspection of the equipment is required. Firstly, confirm that the coolant level is within a safe range to avoid the circulation pump running idle due to low levels; Next, check the sealing of the circulation pipeline interface to prevent safety hazards caused by leakage of ethylene glycol mixture; Finally, verify that the power supply voltage matches the rated value of the equipment, and ensure that the operating environment is well ventilated and away from flammable and explosive substances. For direct cooling equipment, it is necessary to additionally check the refrigerant pressure gauge to confirm that the evaporator has no abnormal frosting.

　　2、 Parameter setting: the core step of precise temperature control

Enter the parameter setting interface through the 7-inch color touch screen and adjust the target temperature and temperature change rate according to the process requirements. The semiconductor wafer testing scenario requires a wide temperature range of -40 ℃ to 250 ℃, with a temperature control accuracy of ± 0.5 ℃; The freeze-drying process in biopharmaceuticals requires a dynamic range of -35 ℃ to 100 ℃ to be locked in. The device supports adaptive PID algorithm, which can automatically optimize the heating/cooling power output. For multi-channel temperature control requirements, one to many independent control can be achieved through the MODBUS RTU protocol, and a single device can manage up to 8 reaction vessels synchronously.

　　3、 Operation monitoring: real-time data and security protection

Continuous monitoring of key parameters is required after startup: the outlet pressure of the circulating pump should be stable at 0.2-0.5MPa, and the flow rate should be displayed in real-time through an electromagnetic flowmeter; The temperature difference between import and export should be controlled within ± 2 ℃ to avoid local overheating. The device is equipped with multiple safety protections. When overheating, overvoltage, or circulation pump failure is detected, the PLC control system will automatically cut off the power and trigger an audible and visual alarm. For high-temperature circulators, special attention should be paid to the surface temperature of the electric heater to prevent damage to surrounding components due to thermal radiation.

　　4、 Maintenance and upkeep: key measures to extend equipment lifespan

After the daily operation is completed, execute the "soft shutdown" program, gradually reduce the frequency of the compressor, delay the circulation pump for 1 minute to stop, and ensure that all residual heat is discharged. Perform monthly pipeline cleaning and rinse the surface sediment of the heat exchanger with deionized water; Replace the coolant quarterly and use specialized media to prevent corrosion. Annual maintenance needs to be carried out by professional engineers, including checking the wear of the magnetic coupling pump bearings, calibrating the accuracy of the platinum resistance temperature sensor, and updating the PLC firmware version.

Through standardized operating procedures, the Putec cooling cycle can achieve a problem free operation rate of 98.7%. Its heat recovery technology improves energy efficiency by 40% compared to traditional equipment, providing reliable guarantees for precision manufacturing and scientific research experiments.