What are the processing methods of adverse contact phenomenon during using pointer multimeters?

This article briefly introduces the processing methods of adverse contact phenomenon during using pointer multimeters.

The typical feature of the malfunction between the plug and the socket of the test line is that the pointer of the multimeter will jump during the test, if it is a digital multimeter, Then when the measurement digital display will jump, can not get stable data).

First, the cause of contact malfunction and the treatment method.

The main causes of contact malfunction are loosening, contamination, corrosion or elastic fatigue of materials. The loosening of the connector should be fastened, the pollution fault should be cleaned, the corrosion phenomenon should be polished, and the new partsshould be replaced for the elastic fatigue failure of the material.

Second, the treatment method of loosening the plug of the watch pen. The structure of the multimeter is different from that of the plug connected to the socket of the multimeter. The specific processing methods are as follows.

1. Open type two-valve plug.

For a multimeter with an open two-valve plug, a suitable flat screwdriver can be inserted into the Reed of the plug, and then slightly pry the Reed out of the drum, so that the plug is firmly inserted into the socket of the multimeter.

2. Banana plug.

For a multimeter with a "banana" plug, a suitable flat screwdriver can be inserted into the plug, and then the plug is slightly larger, so that the plug is firmly inserted into the socket of the multimeter.

In the above operation, it is appropriate to restore the "banana" plug as it is, and the range of writhing should not be too large to prevent the Reed root from being broken or damaged.

Treatment of loose socket.

The multimeter is used for loosening the socket of the pen plug. For a four-valve socket (for example, the MF-30 type multimeter), the socket can be removed, and then the four valves are clamped to the center by using the tip pliers. The problem can be solved.

The method to deal with the error in each position.

This article is from Allicdata Electronics.

Since the current range of the pointer multimeter is the basis of other measuring ranges, it is necessary to check whether there is any problem with the DC range when there is an error fault in each position.