The water bath thermostat is a very common experimental instrument. It is very simple to operate and easy to use. However, I often encounter some problems when I use it. Let me introduce you to the problems that are often encountered in the work and how to solve them. .
1. The water bath constant temperature oscillator heats up normally and the oscillation speed becomes slower.
Solution: Open the side panel of the control cabinet, turn on the power, set the temperature control to 0 degrees (ie, no heating state), turn on the oscillation switch, adjust the speed to the highest, and find the two adjustable resistors on the speed control board. Adjust the right side counterclockwise to solve.
2. The water bath constant temperature oscillator is not heated and the oscillation is normal.
Solution: First determine whether the heating tube is damaged. If it is damaged, it needs to be replaced. Then it is judged whether the temperature control part is damaged. If it is damaged, it needs to be replaced.
3, the water bath constant temperature oscillator is heating normally, the oscillation can not work.
Solution: Open the side panel of the control cabinet, turn on the power, set the temperature control to 0 degree (ie, no heating state), turn on the oscillation switch, adjust the speed to the highest, use the multimeter AC 250 to measure the transformer with or without 220V voltage input. If not, the switch is broken. Conversely, the transformer has 12V voltage output (using 50V AC). If the transformer is not damaged, do not replace the transformer easily. This situation is mostly caused by short circuit fault in the rectifier part of the circuit board or the motor. (This phenomenon occurs, the appearance of the transformer has a charring phenomenon), in the above case, replace it. 12V voltage is normal, check whether there is DC 12 voltage (DC 50V gear), no rectifier bridge is broken, replace. Some check whether there is voltage output to the motor (about 5-8V), and if the motor is bad or the instrument is not used for a long time, the mechanical part is rusted, and the high power tube in the control board is not broken. The above method can basically solve the non-oscillation situation.
When you encounter a simple fault, you must first learn to determine the cause of the malfunction, carry out the right medicine, and use the simplest method to eliminate the fault. If you can't solve it, please contact our company or find a professional electrician for repair.
The above article is provided by Shanghai Billion Instruments. You are welcome to learn more about laboratory equipment from Baidu Search Shanghai Bilang Mall!
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