The constant temperature water bath uses water as the heat transfer medium and is generally used at temperatures not exceeding 95 °C. Widely used in drying, concentration, distillation, impregnation of chemical reagents, impregnated drugs and biological agents, also for water bath constant temperature heating and other temperature tests, is biological, genetic, viral, aquatic, environmental, medical, health, biochemical laboratories, analysis An essential tool for education and research in the classroom.
The constant temperature water bath generally consists of two layers. The inner layer is a groove made of an aluminum plate or a stainless steel plate. The tank is filled with water as a heating and heat transfer medium, and a copper tube is installed at the bottom of the tank. An electric furnace wire resistance wire is installed in the tube as a heating element, and the resistance wire is covered with a porcelain tube to prevent leakage from contact with the copper tube, and the two ends of the resistance wire are connected to the temperature controller for controlling the heating resistance wire to keep the water temperature in the tank constant. . The water tank is equipped with a temperature measuring element, and the temperature can be adjusted through the temperature control knob on the panel. The outer shell of the water bath is usually made of thin steel plate, the surface is painted for anti-corrosion, the inner wall is provided with insulating material, and the front panel of the water bath has a power switch, a temperature adjustment knob and an indicator light. There is a drain valve on the underside of the tank, and a Thermometer inserted into the water on the upper plate of the casing is used to measure the water temperature.
There are many models and specifications for constant temperature water baths. There are several types according to the total power of the components: 500W, 1000W, 1500W, 2000W, etc.; according to the number of holes, there are single hole, single row double hole, single row 4 hole, single row 6 hole, single row 8 hole, double row double hole. Double row 4 holes, double row 6 holes, double row 8 holes, etc.; according to its temperature control display device is divided into pointer type and digital type.
Attention should be paid when using a constant temperature water bath
A: Water must be injected before use, and the appropriate amount of clean tap water should be injected into the studio water tank. The minimum water level should not be lower than 1cm above the pipe. If the water level is too low, the surface temperature of the pipe will be too high and burned. Before adding water to the proper position, do not Turn on the power; B: Turn on the power.
C: Select constant temperature:
1. Turn the temperature “Set-Measure†selector switch to “Settings†and adjust the temperature control knob to digitally display the desired set temperature.
2. Turn the temperature “Set-Measure†selector switch to “Measure†and the digital display shows the actual temperature of the working tank. (The red indicator light is on, indicating that the heater is working).
D: After the work is completed, set the temperature control knob to the minimum value and cut off the power.
E: If the water bath is not used for a long time, the water in the studio water tank should be removed, wiped clean with a soft cloth and dried.
F: It is forbidden to use the heater in the state where the constant temperature water bath is not water.
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