How to use the multimeter firewire recognition function
Electricians engaged in maintenance and fault-finding previously with a pen, now with a multimeter, in fact, not only the pen can distinguish between firewire and zero line, the multimeter can also distinguish between firewire and zero line, just that many people do not know it!
Electric pen to distinguish between fire wire and zero line method
Ordinary pen: for the electrician in the past maintenance check faults, are a pen to go all over the world, ordinary pen to distinguish between fire and zero line, most people basically know, directly with the pen to measure the fire and zero line, the pen is bright for the fire, the pen does not light for the zero line!
Digital pen: since the digital pen, for the ordinary pen has been rarely used, for the digital pen features more, such as not charged to check the disconnect, distinguish between zero and fire, distinguish between positive and negative DC battery, determine whether the wire is short-circuited can be, so gradually the ordinary pen is also eliminated, with the digital pen to distinguish between the fire line and the zero line, if you use the pen to measure directly with the pen to measure the fire line and the zero line, observe the digital pen Voltage, if the display of the maximum voltage of 220V, proving that the firewire, if the display of the maximum voltage of 12V or 36V voltage, proving that the zero line!
Induction breakpoint stylus: the main function of the breakpoint stylus is that after the wire is not energized, to find the location of the breakpoint inside the line, breakpoint stylus to distinguish between the fire line and the zero line, with the breakpoint stylus to measure the fire line and the zero line, breakpoint stylus measurement of the fire line, the sound emitted is more rapid, the measurement of the zero line, the sound emitted is slower!
Multimeter to distinguish between the fire wire and the zero line of the method
For the multimeter will have an AC voltage gear, for AC voltage gear can measure the voltage of alternating current, measuring voltage with red and black pens, respectively, placed on the fire line and the zero line, it will show its voltage, but the measurement of voltage, to be placed in the appropriate gear, such as the measurement of household 220V, 380V voltage, the multimeter should be placed in the AC voltage of 700V gear!
For AC voltage gear, not only can measure the voltage, in fact, can also distinguish between firewire and zero line. Just a lot of people do not know it, the multimeter to distinguish between the fire line and zero line, the multimeter on the AC voltage gear, the black pen on one side, with the red pen to measure the fire line and the zero line, observe the multimeter's digital, digital large is the fire line, the digital is small is the zero line, if you feel the digital is not too obvious when you can put the gear, adjust a little bit smaller, so that the number will be more obvious!
