Shanghai Haozhuang Instrument Co., Ltd. has developed the LNB brand low-temperature thermostat, which is energy-saving and environmentally friendly, leading the country. Professional manufacturing is more secure and affordable.
Overview: Microcomputer temperature-controlled low-temperature constant temperature bath adopts single-chip microprocessor control, self-tuning PID adjustment, imported platinum resistance (Pt100) temperature measurement, high temperature control accuracy, small fluctuations; compressors using high-quality Italian technology (less than- 40 ℃ or 30 liter series adopts all imported compressor units), with high refrigeration efficiency and low noise. The instrument is stable and reliable, and the operation is convenient and safe. The product has the following advantages: 1. Microcomputer temperature control PID adjustment, self-tuning control technology, high temperature control accuracy; 2. With broken couple protection function; 3. Lower limit over temperature alarm function; 4. Fully enclosed brand compressor, cooling Fast; 5. There are folding handles on the left and right sides for easy movement; 6. The temperature rise and fall is fast, stable and reliable; 7. The set temperature and measured temperature are displayed by two digital windows; 8. The circulation pump can be used for constant temperature liquid Introducing circulation; DC series low temperature thermostat is widely used in bioengineering, medicine, food, chemical, metallurgy, chemical analysis, petroleum and other fields, providing users with a high-precision, controlled, uniform temperature constant field source, is research Ideal constant temperature bath for institutes, universities, factory laboratories, and quality inspection departments.
Installation and operation: 1. Remove the packaging, do a good job of cleaning, and put it on a firm workbench. 2. If it is a 20 liter, 30 liter series and -65 ℃, -80 ℃ constant temperature bath, you should first remove the two sides of the net plate, and then remove the two packaging screws, lift the constant temperature bath away from the wooden frame and place Firmly on the workbench. 3. After unpacking the newly arrived thermostat, it must be parked for 12 hours and then powered on. 4. Add liquid medium (anhydrous alcohol or ethylene glycol) to the tank so that the liquid level of the medium is lower than the workbench by about 30mm. 5. Connect the circulating pump inlet and outlet pipes. ①When the circulation pump does not need to perform external circulation, just connect the “inlet pipe†and “outlet pipe†with a hose. ② When the circulating pump is used for the external circulation of constant temperature liquid, two hoses are used to connect the "outlet" tube to the inlet of the experimental container outside the tank, and the "inlet" tube to the outlet tube of the experimental container outside the tank. 6. Turn on the power, turn on the "power" switch, and turn on the "cycle" switch.
Environmental requirements 1. The thermostatic bath should be placed on a sturdy workbench; 2. No vibration and no harmful gases; 3. The room temperature should be relatively stable, and can not be changed suddenly, affecting the temperature control accuracy; the room temperature should be around 25 ℃, Do not exceed 30 ° C (especially the constant temperature baths at -40 ° C, -65 ° C, and -80 ° C). Excessively high room temperature will affect the heat dissipation of the compressor, reduce the refrigeration efficiency, and easily cause malfunctions; 4. After the constant temperature bath works for a period If you feel that the cooling rate is slowing down, you should remove the plastic mesh plate of the constant temperature bath to remove the dust from the compressor and heat sink. SP SP 20.0 SP ▼ 25.8 -5.0 ▲ ▼ SP -5.0 SP
Precautions for use 1. Add liquid medium into the tank before use. The liquid level of the medium should be about 30mm lower than that of the workbench; the too low liquid level will damage the heater when energized. 2. The selection of liquid medium in the tank should comply with the following principles: a. When the working temperature is 5 ~ 85 ℃, the liquid medium is generally selected water; b. When the working temperature is 85 ~ 95 ℃, the liquid medium can use 15% glycerin Aqueous solution; oil should be used when approaching or reaching 100 ℃; c. When the operating temperature is lower than 5 ℃, the liquid medium generally uses alcohol or freezing liquid; 3. After the refrigeration switch is turned off, the refrigeration switch should be turned on again with an interval of 15 ~ 25 minutes ( (Depending on the ambient temperature); 4. Power supply: 220V50Hz, the power supply should be greater than the total power of the instrument, the power supply must have a good "grounding" device; 5. The instrument should be placed in a dry and ventilated place, no obstacles within 300mm around the instrument; 6, when When the working temperature of the constant temperature bath is low, you should pay attention not to enter the bath to prevent frostbite; 9. After use, all switches are turned off and the power is turned off; 10. The instrument should be cleaned regularly to keep the work surface and The cleanness of the operation panel; 11. Observe the liquid level in the observation tank frequently. When the liquid level is too low, the liquid medium should be added in time.
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