Raw materials for low-pressure test chambers and other methods of operation

Low pressure test chamber material

Inner box: inner pressure-type stainless steel case: hot-rolled steel plate (spray), shell-assisted pressure-bearing design? Insulation: high-strength PU foam resin and high-density fiberglass cotton

Heater

Air heater: nickel-chromium alloy electric heater; wall heater: stainless steel armored electric heater

Fan: magnetic coincidence drive axial fan

Compressor: semi-closed compressor, binary cascade, water-cooled (with automatic water flow regulating valve)

Cooling method: finned transpiration heat exchanger, ducted wall transpiration heat exchanger

Vacuum pump: mechanical rotary vane oil-immersed vacuum pump (with oil mist filter)

Pressure regulating valve: electronically regulated ball valve? Temperature sensor: T-type armored thermocouple? Pressure sensor: electronic pressure transmitter

Controller

Temperature regulation and humidity control method: BTPC flat constant temperature regulation method

CPU: dual 32-bit microprocessor

Visualizer: 6.4-inch TFT LCD display (640 × 480 dot matrix)

Low temperature and low pressure test chamber operation method

Program method

Program capacity: 20 programs, each program has at most 50 segments, and the cycle step has 99 cycles at the top, which can continuously set the scale.

Temperature -100～300°C: Pressure 0～100 kpa

Resolution: Temperature 0.1 °C Pressure 0.01kpa: Time 0.1 minutes

Communication function: RS-485 interface, with local and long-distance and PC communication functions (optional)

Control method: anti-integration full PID printing function: optional continuous micro printer? Curve recording function: with battery maintenance RAM, can save the temperature and humidity measured by practice: set temperature, humidity: and sampling moment: storage time 60 days (sampling period is 1.5 minutes)

USB function: the user can go through the USB disk, store/recall the setting program: the experimental curve data stored in the controller can be stored on the USB disk, and the experimental curve is displayed and printed by the PC.

Power supply: 380V 50Hz specification equipment: observation window, sample holder 2 sets, lighting, accumulator, power line 3M, micro digital printer, external pressure test interface, manual inflation valve

Safety equipment: leakage maintenance, motor overheat maintenance, temperature fuse, cooling water under pressure maintenance, sample over temperature maintenance, chiller overpressure maintenance, fan overheat maintenance