Repairing multimeters with loose leads and pins
1, multimeter red and black pen in the stake, you can pull out, see a metal male socket connected to a leather wire, just because the junction of this line column is easy to break, tell you, my pen line has been much shorter, repair many times, each time to waste 1cm, I have two kinds of table (electronic, pointer) are unloading the line to repair the pointer table line connector is good to repair some, as long as there is a threaded red plastic on the set of unscrewing the metal stake clamped to a vise, use a soldering iron to melt on the solder wire, and then the leather wire stripped out half a centimetre to reveal the copper wire, melted with tin. In a vise, with a soldering iron melted on the solder wire, and then stripped out half a centimetre of the leather wire, exposing the copper wire, melted with tin, it is best to set an insulating wax tube on the line, so that after soldering outside the casing will not be easy to break.
2, for the digital table of the stake is not very good welding, it's plastic cover and big and hard, you have to pull out the first line through the line, welded on the outside and then return it to its original position, if you even welding technology are not, it is difficult to get!
See the red pen stub above is the plastic sleeve that was repaired and then ironed firmly with a soldering iron to secure the crack.
People who can own and use a multimeter will have some knowledge and exposure to radio and electrical supplies for repairs, and will inevitably use a soldering iron, which can be taken apart and soldered.
Multimeter to measure the short circuit
First of all, the black pen of the multimeter into the "com" hole, the red pen into the "V Ω" hole, the knob to the beeping gear position. The line will be tested by disconnecting the power supply, the two pens were measured line of the two lines, if the multimeter resistance display is 0, and there is a beeping sound, indicating that the line has a short-circuit phenomenon. Also available ohm 1k file or 10k file, disconnect the other end of the line, the two pens to test the two lines, if the multimeter resistance shows 0, indicating a short circuit in the line.
Multimeter test break
When we measure the on-off of the line, we must disconnect the power supply before testing. Turn the knob switch to the beeping gear, to test both ends of the line were touched to the metal pin of the meter pen, if there is a certain resistance, and there is a beeping sound, it means that the line is on; if the resistance is infinite, the display is 1, and there is no beeping sound, then the line is disconnected. Or multimeter select 10k gear, the other end of the line to short, with the multimeter pen to test the two wires, if the multimeter resistance shows 1, it means that it is disconnected; shows 0, may be the line is on.
