Fault detection and repair of full temperature constant temperature oscillator

Fault detection and repair of full temperature constant temperature oscillator

Fault detection and repair of floor-standing frozen shaker

In recent years, the full-temperature thermostat has been widely used in schools, chemical, biological, scientific research and other departments. It is one of the necessary equipment for storing bacteria and biological culture.

In the case of prolonged use or improper operation, we often encounter some faults of the equipment, so how do we deal with and solve when we encounter these problems? Let me briefly talk about it below.
First of all, we will use observation, using vision, smell, and touch. At some point, the damaged component will change color, blister or burnt spots; the burnt device will produce some special odor; the shorted chip will be hot; the virtual solder can be observed or de-soldered. Where.

There is also the use of exclusion methods, such as the method of judging the cause of the failure by plugging in some boards and devices inside the machine. When the instrument returns to normal after removing a board or device, the fault has occurred there.
Then there is the contrast method. We must have two devices of the same model and one of them is in normal operation. Use this method to have the necessary equipment, such as a multimeter, oscilloscope, etc. According to the nature of the comparison: voltage comparison, waveform comparison, static impedance comparison, output comparison, current comparison, etc. The specific method is: let the faulty meter and the normal meter run under the same conditions, and then detect the signals of some points and then compare the two groups of signals measured. If there are differences, it can be concluded that the fault is here. This method requires the maintenance personnel to have considerable knowledge and skills.

If there is no two full-temperature constant temperature oscillation of the same model, the fault isolation method can be adopted. This method is also relatively safe and reliable. It is based on the fault detection flow chart, segmentation and enveloping gradually narrows the fault search range, and then cooperates with signal comparison, component exchange, etc. Method, generally will quickly find the fault.

Some faults are actually very simple. We only need our hands-on work, so we should be good at using simple techniques to find problems and solve problems to improve our work efficiency.
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