In the instrument maintenance work, should first understand the basic principle of instrument and meter, electrical and master relevant knowledge and skills, and should be ready for all instrument specifications, drawings and other technical data, also should form a good working quality, so as to improve efficiency in the instrument maintenance, reduce mistakes. This can avoid a lot of unnecessary trouble. Below a simple look at the following points, hope to help users, useful.

1, with the multimeter ohm block, remember not to live measurement.

2. When using the logic pen and oscilloscope to detect the signal, please pay attention not to make the probe contact the two measuring pins at the same time, because the essence of this situation is to form a short circuit under the condition of adding electricity.

3, the detection of the filter capacitance in the power supply, should be the electrolytic capacitor's positive and negative pole short circuit, and short circuit do not use the pen line to replace the wire to discharge the capacitor, because it is easy to break the core wire burning. You can take a 220V, 60-100w lamp with a cap lead, and connect it to the two ends of the capacitor. The bulb will flash at the moment of discharge.

4, in the humid environment of the maintenance of instrument fault, it is necessary to print the circuit with a multimeter to test whether the point is unobstructed, because the main fault in this case is copper corrosion.

5. When inspecting the internal circuit of the instrument, if the contact points of the installation components and the circuit board are coated with insulating varnish, the parameters of each point can be measured by welding ordinary hand stitches on the pen of the multimeter, so as to puncture the paint layer and directly measure each point without stripping the paint layer in a large area.

6, do not live plug and plug all kinds of control board and plug. Because in the case of power, the plug control board will produce a strong induction electromotive force, at this time the instantaneous counter voltage is very high, it is easy to damage the corresponding control board and plug.

7, maintenance do not blindly knock random touch, so as not to expand the fault, the more bad repair.

8. When disassembling and adjusting the instrument, the original position should be recorded for restoration.

9, repair precision instruments and meters, such as accidentally small parts bounce off, should first judge the place where may fly, do not look east, west turn over, can take magnetic scanning and line of sight scanning method to find.

In short, in the instrument maintenance work, should first understand the basic principle of instrument and meter, electrical and master relevant knowledge and skills, and should be ready for all instrument specifications, drawings and other technical data, also should form a good working quality, so as to improve efficiency in the instrument maintenance, reduce mistakes.