The distinction between a multimeter and a megohmmeter
The megohmmeter is used to measure the insulation, such as the measurement of the motor, because it can output high voltage above 500V, and the output voltage of the multimeter is very low, so it cannot measure the insulation degree of the electrical appliance.
Megger (Megger) is commonly known as a shaker, and most of the megger is powered by a hand-operated generator, so it is also called a shaker. Its scale is in megohms (MΩ). -- Home of Electrical Technology
Megohmmeter is a kind of measuring instrument commonly used by electricians. The megohmmeter is mainly used to check the insulation resistance of electrical equipment, household appliances or electrical lines to the ground and between phases, so as to ensure that these equipment, electrical appliances and lines work in a normal state, and avoid accidents such as electric shock casualties and equipment damage.
Multimeters, also known as multimeters, multimeters, three-meters, multimeters, etc., are indispensable measuring instruments in power electronics and other departments. Generally, the main purpose is to measure voltage, current and resistance.
The multimeter is divided into pointer multimeter and digital multimeter according to the display mode. It is a multi-functional and multi-range measuring instrument. Generally, the multimeter can measure DC current, DC voltage, AC current, AC voltage, resistance and audio level, etc., and some can also Measure AC current, capacitance, inductance and some parameters of semiconductors (such as β).
The megohmmeter is to measure resistance, and the multimeter also has the function of measuring resistance. From this point of view, it seems that it can be replaced; but the megohmmeter is used to measure large resistance, and it is mostly used to measure the insulation resistance of electrical equipment. The unit is How many megohms or more, and the range of the multimeter is mostly at the ohm level, so when the resistance is large, it will display infinity, and the data cannot be read.
Therefore, the multimeter cannot replace the megohmmeter.
The megohmmeter is a high-resistance meter. The general multimeter is a medium-resistance meter. The megohmmeter can only measure resistance. In addition to measuring resistance, the multimeter can also measure voltage, current, transistors, etc. Megger is generally used to measure two electrical equipment The insulation resistance between ground and ground is a basis for preliminary judgment of whether the equipment can be put into operation.
The ohm range of the multimeter is mainly used to measure the resistance value of the equipment components, and it can also be used to measure the on-off of the wire. When there is no megger during maintenance, it can also roughly measure the insulation resistance of the equipment (or electrical appliances) to the ground.
Attachment 2, the megohmmeter is used to measure the insulation, such as for the motor, because it can output high voltage above 500V, and the output voltage of the multimeter is very low, so it cannot measure the insulation degree of electrical appliances.
The megohmmeter is used to measure the insulation resistance, commonly known as the shaking meter. There is a generator inside, and the commonly used ones are 250V, 500V, 1000V, and 2500V. -- Home of Electrical Technology
The multimeter is used to measure AC and DC voltage, DC current, resistance, and can measure the magnification of the triode, as well as diodes, capacitors, inductance, etc.
The megohmmeter is used to measure the insulation resistance, commonly known as the shaking meter. There is a generator inside, and the commonly used ones are 250V, 500V, 1000V, and 2500V. The multimeter is used to measure AC and DC voltage, DC current, resistance, and can measure the magnification of the triode, as well as diodes, capacitors, inductance, etc.
When the megohmmeter is used, a voltage of 500V is emitted, but the current is very small. The multimeter will emit voltage when measuring resistance, and the voltage is very low; it will not emit voltage when measuring voltage and current.
The European meter is used to measure the insulation resistance, commonly known as the shaker meter. There is a generator inside, and the commonly used ones are 250V, 500V, 1000V, and 2500V.
The multimeter is used to measure AC and DC voltage, DC current, resistance, and can measure the magnification of the triode, as well as diodes, capacitors, inductance, etc.
