A digital multimeter has two great uses
Variable ratio tester manufacturers introduce the two great uses of digital multimeter
This method can be used to check whether the power cord of household appliances is broken, but also to check out the location of the broken wire inside the electric blanket, electric iron and other household appliances.
I. Determine the location of the broken core of the wire 【Phase Meter
Method: the broken core of the insulated wire end of the 220V AC power line, the other end of the suspension. Digital multimeter dialled to 2V block, from the beginning of the firewire end, the red pen will move along the insulating skin of the wire, the voltage value should be displayed in the zero point a few volts up and down jumps. When the red pen is moved to a certain place, the voltage suddenly drops to zero point zero volts, indicating that this must be the location of the broken core.
Variable ratio tester manufacturers introduce the two great uses of the digital multimeter [DC high voltage generator
Digital multimeter AC 20V block, two measurements of the readings were 6.01V and 0.4V, 6.01V end is the power supply "fire" line, 0.4V is zero money.
Due to the high sensitivity of the digital multimeter AC block, but also can not touch the internal copper wire, only touch the outer skin of the two power lines can also accurately determine the fire line, the same method as described above. As the tip of the pen did not touch the inside of the copper wire, so the induced voltage is small, it should choose a smaller range of gear.
Second, distinguish the utility "zero" money and "fire" money
The multimeter dialled to AC 20V stop, remove the black pen, holding the red pen insulated rod, with the tip of the pen in turn touch the power socket in the two holes, which shows a larger value of a "fire" line, showing a smaller number of socket holes for the "zero" line.
