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How to detect short circuit with megohm meter

time:2020/6/13   source:华天电力  reading:316 time

Digital megometers are an excellent tool for determining whether a given electrical system is short-circuited. You can also use one Megabyte to check for short circuits in the other. If your megometer cannot be turned on or reads incorrectly, a second megometer can be used to check the circuit for conduction or resistance to check for short circuits. Checking on and off will let you know if the megom is losing voltage, and the test resistance will tell you if the circuit is properly connected.


Step 1


Turn on the digital megohm meter and test it on the known circuit to ensure it is in good working condition. If the megometer shows no readings or an error reading, test again and continue with Step 2


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Step 2


Remove the back panel of the digital megohm meter using a small screwdriver. Visually inspect the circuit for visible gaps or brown liquids. If a gap is detected or a brown viscous liquid is detected, discard the digital megometer. If no significant short circuit is detected, continue with Step 3.


Step 3


Test whether the first digital megohm is short-circuited by setting the second digital megohm to its continuity mode. Touch the tip of the test probe on the second megometer together to form a circuit. Your megometer should beep. This will indicate that a continuous circuit has been formed. If you don't hear the beep, make sure both probes touch only the metal parts. Also, make sure you hear the beep. If the megohm meter does not beep, check to make sure you are in continuous mode as indicated in the user manual. Once the circuit is formed, the beep is heard and the other circuits can be tested.


Step 4


The touch test wire forms a continuous circuit in the first megometer at two points on the same wire. The location of the test line is irrelevant because continuity is not affected by polarity. Jointed digital megohm meter. You should hear a beep. This indicates that there is no short circuit in the circuit. If the buzzer is not heard, it may indicate that the circuit is short circuited or disconnected at some point, and that the charge released from the Megabyte does not pass through the circuit completely. Most digital megometers display "OL" or "open loop." This indicates a lack of continuity in the circuit. This is also shown when the probes are not connected to the circuit and do not touch each other.


Step 5


The probe touches the circuit again in other areas. If there is continuity, you will hear a beep and the megometer display will display a very small voltage. If the beep is not heard, the circuit must be repaired and conductivity checked again.


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