Padoms lietot a multimetrs to noteikt kopīgs elektronisks komponents?
Pretestība detektēšana
The most direct way to detect resistance is to use the multimeter resistance file to measure. General, the resistance size will be marked on the resistance. Select the appropriate resistance file and connect the red and black test leads to both ends. If the reading is close, it is normal, otherwise it is broken. When making resistance, be careful not to touch the red and black test leads with both hands. It is not dangerous, but to nodrošināt precizitāti of the resistance measurement. It is ok to touch one of the test leads with your hands.
Parasti potenciometrs ir trīs pins, pirmais lietošana a multimetrs to izvēlēties pretestība pārnesums to tests vai pretestība starp diviem no trīs tapas no potenciometra ir vai tuvu pretestībai atzīmēts uz potenciometrs potenciometrs 2c tas nozīmē potenciāls Potenciāls Potenciometrs ir bojāts. Ja normāls multimetrs turpina izmērīt šie divi tapas 2c tad pagrieziens potenciometrs pretēji pulksteņrādītāja virzienam uz pozīcija tuvu to the off position. At this time, the resistance value is as small as possible. Then turn it clockwise. If the resistance gradually increase, Rotate līdz the final resistance value is close to the marked resistance value, then the potentiometer is normal.
Fiksēts kondensators noteikšana
In papildinājums to izmantošana a multimetrs to atlase atbilstošais diapazons of the capacitance block to measure the capacitance value, you can also use the resistance file to measure. When mērīšana, choose the appropriate resistance file. Use two test leads to connect the two pins of the capacitor. The resistance value should be infinite. If If the resistance value is 0, the capacitor is bojāts.
Elektrolītisks kondensators noteikšana
The measurement method of electrolytic capacitor is a little different from that of fixed capacitor. Of course, you can choose to use capacitive block to detect. Everyone knows this. Let me talk about the method of using electric block to measure. First, choose the appropriate resistance file, and the red test lead and black test lead respectively touch the capacitor. Two poles, at this time, the displayed value will increase from {{0}} until the overflow symbol 1 is displayed. If it always displays 0, it means that the capacitor is short-circuited inside. If it always displays 1, it means that the capacitor is open. It should be noted that when measuring, because the electrolytic capacitor has positive and negative poles, it must not be reversed here. Usually, the red test lead is connected to the anode of the capacitor (the one with long legs), and the black test lead is connected to the cathode of the capacitor (the one with short legs). , the pointer multimeter is just the opposite.
Induktivitāte detektēšana
Also select the resistance gear of the multimeter, and connect the test leads to both ends of the inductor. If the measured resistance value is zero, the inductor is short-connectored internally. Under normal conditions, the DC resistance of the measured inductor is the same as the diameter of the emaljēts wire used to wind the inductor coil, and the wire tinums spole. Skaitlis ir a tieša attiecība, as long as the resistance value can be mērīts, the induktivitāte var būt ņemts vērā normāls.
Diods noteikšana
Pielāgot multimetrs to the detection diode gear, connect the anode of the diode with the red test lead, and connect the cathode of the diode with the black test lead. If the voltage drop of the diode is display on the display screen (parasti {{0}}}}.5 for the silicon tube and 0.2 for the germanium tube), it nozīmē ka diode is is normāls. Aizstāt the test leads , if the display show 1, it is normal, otherwise it is broken down, if the two test results are 0 or 1, it means that the diode is bojāts.
LED noteikšana
Also pielāgot the digital multimetrs to the detection diode block, touch the anode of the light-emitting diode with the red test lead, and touch the cathode of the light-emitting diode with the black test lead (same as the diode above), if you see it it glowing, it means normal, otherwise it is bojāts.
