How can the low temperature constant temperature water tank achieve high precision temperature control?
We all know that the accuracy of the temperature is the soul of the low temperature constant temperature water tank . The precise temperature can make our experimental data more accurate, but how to achieve accurate temperature control is determined by all aspects of our low temperature constant temperature water tank.
First of all, it is determined by the structural design of the low temperature constant temperature water tank, which involves the temperature sensing element, the structure of the heater and the evaporator, the installation position and thermal inertia, and the uniformity of the heat of the medium, the insulation of the device, the advantages and disadvantages of the insulation and the operation of the whole machine. Whether it is stable and reliable. When the bath structure is determined, another determining factor is the temperature control system.
The cryogenic constant temperature water tank requires precise temperature control of the temperature of the liquid in the tank (temperature control accuracy is 0.1 °C or even 0.01 °C). The most commonly used method is heating with a resistance wire and cooling of the compressor, supplemented by a PID microcomputer self-tuning precise temperature control method to stabilize the temperature of the constant temperature bath at the required set temperature.
Low temperature constant temperature water tanks are generally equipped with a highly stable platinum resistance PRT or other temperature sensor to achieve temperature control and automatic protection of the thermostat. The controller uses a special noise suppression circuit to detect the small change in resistance required for a high-stability thermostat. The internal temperature of the instrument is measured using an AC bridge to reduce the thermoelectric potential. Custom, high precision, low temperature coefficient resistors ensure short-term and long-term stability of the temperature set point.
The constant updating of high technology makes our cryogenic constant temperature water tank installation more and more technology, and our products are constantly innovating, so that more new technologies can be applied on our low temperature constant temperature water tank, so that the innovation of the product can be combined with the market. stand up.
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