What stops do you use on a multimeter to check if a line is open or closed?
The use of digital multimeter beeping file can test the wire through. The two pens are touching the two ends of the wire, if you hear the "beeping" sound, the wire is on, no sound means that the wire is disconnected. Please refer to the following steps to confirm.
1,Find a digital multimeter, insert the red pen into the interface of the multimeter "voltage/resistance/diode/passing beep measurement", and the black pen into the interface of "common measurement".
Press the power button (i.e. power button) of the multimeter to turn on the power, and press the Hold button to check the switching and holding functions of the key. Then turn the big knob in the middle of the multimeter to test whether the function conversion is normal.
3,After confirming, adjust the position of the big knob to the beeping diode gear.
4, the red pen and black pen contact, if the beeping gear can be heard beeping. If you do not hear the beeping sound, you need to check whether the pen is inserted properly or whether the pen is damaged. If the check is not a problem of the pen, it means that this time in the "diode gear", press the hold key to switch the function to "beeping gear".
5, and then the multimeter red pen and black pen were contacted with both ends of the wire, if you hear the beeping sound can be judged as the wire is on, otherwise it is not.
Line through and not universal multimeter measurement needs to be measured according to what line selection gear, such as measuring the lights do not light up whether the line is not passable can be used to check the power supply with AC 250V or more than the voltage file is normal, connect or disconnect the lights switch power supply voltage indicator is unchanged, you can be sure that the lights line or bulb has a problem, such as the voltage changes can be judged to be a failure of the power supply line; if it is a simple measurements If it is a simple measurement of a section of wire is disconnected in the middle of the situation, you can use the gear switch in the accompanying chart as a follow-up question counterclockwise and then turn two gears, that is, the measurement of diodes and "through" a file, which is a digital multimeter to measure the general power line through and diode good or bad special gear, the gear measurement of the meter pen between the resistance of a very small amount of time (generally 200 Ω or less) will be direct. Measurement of diode forward resistance) will be directly issued a continuous sound prompts, if the resistance between the table pen is large (there is a disconnection or diode in the reverse connection) will not sound, if the measurement of shaking the line appears to have a sound intermittent, indicating that shaking parts of the poor contact, the line will be disconnected not disconnected place. Note that the use of resistance measurement gear, the power supply should be disconnected for.
