What happens if the two wire short circuit pointer of the megohmmeter does not move and does not ret

Current coils or zero-balance coils are locally short-circuited or open-circuited. In this case, the current coil or the zero-balance coil should be repaired or rewound.

The resistance of the current loop changes, and the resistance value becomes smaller, and the pointer exceeds the zero position; When the resistance value increases, the pointer does not reach the zero position. For this, the resistors in the current loop should be replaced.

The table should be shaken before measuring.

Make an open circuit.

and short circuit test to check whether the shake table is good. Open the two connecting wires, shake the handle, the pointer should point at the "" place, and then short the two connecting wires, the pointer should point at the "0" place, meet the above conditions that are good, otherwise it can not be used.

The resistance of a conductor is usually denoted by the letter r, and the unit of resistance is ohms.

ohm), abbreviated as Europe, is symbolized as (Greek letter.

Pronounced omega), 1 = 1V A. Larger units include kiloohms (k) and megaohms (m) (mega = million, i.e. 1 million).

After determining the range of resistance gear, it is necessary to carry out zeroing, the method is that the two meter pens are short-circuited (directly touching), and the "zeroing" electrical appliance is adjusted to make the pointer accurately point to the "0" of the scale mark, and then the resistance value of the resistance is measured. In addition, it is also important to take care that the human hand does not touch the ends of the resistor or the metal part of the watch pen. Failure to do so will result in test errors.

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What happens if the two-wire short-circuit pointer of the megohmmeter does not move and does not return to zero? When the megohmmeter is short-circuited, the pointer is not zero, and the following steps are used. 1.

Check that after the megohmmeter pen is broken, even if there is a short circuit, no current flows through the meter head, and the pointer will not reach zero. Solution: Repair the pen or replace it with a new pen. 2.

If the internal circuit of the megohmmeter is faulty and the connection line falls off, you need to open the meter and check and deal with it. 3.If the internal generator of the megohmmeter is damaged and the coil of the meter head is broken, this fault should be replaced with the megohmmeter.

What happens if the two-wire short-circuit pointer of the megohmmeter does not move and does not return to zero?

Hello dear, <>

What happens if the two-wire short-circuit pointer of the megohmmeter does not move and does not return to zero? When the megohmmeter is short-circuited, the pointer is not zero, and the following steps are used. 1.

Check that after the megohmmeter pen is broken, even if there is a short circuit, there is no current flowing through the meter head, and the pointer will not reach zero. The processor Gao knows that there is no way, and the cousin can repair the pen or replace it with a new pen. 2.

If the internal circuit of the megohmmeter is faulty and the connection line falls off, you need to open the meter and check and deal with it. 3.If the internal generator of the megohmmeter is damaged and the coil of the meter head is broken, this fault should be replaced with the megohmmeter.

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The operation is as follows: if it is a hand-cranked megohmmeter, while shaking, the two watch pens are short-circuited and quickly separated (otherwise there is a possibility of burning out the instrument). Repeat it several times, at this time it should be back to zero, if it does not return to zero, it must be broken, and there is no need to repair it (make sure that the two table pens are good in advance).

The same is true for electronic megohmmeters, after selecting the voltage level, press the test button, the operation is the same as above, and it should also return to zero. If it does not return to zero, there should also be a fault (the test line should also be checked beforehand.) It's best to replace the battery with a new one or recharge it). Please refer to Hubei Shengdewei.