Kaip į naudoti a multimetras to rasti problemos
Multimetrai, taip pat žinomi as multiplekseriai, multimetrai, trigubi metrai, ir multimetrai, are būtina matavimas instrumentai in galia elektronika ir kiti skyriai, paprastai aimed at matavimas įtampa, srovė, ir varža. Multimetrai are padalinti į rodyk multimetras ir skaitmeninis multimetras pagal to jų display mode. It is a multifunkcinis ir multi diapazonas matavimas instrumentas. Paprastai, a multimetras can measure DC current, DC voltage, AC current, AC voltage, resistance, audio level, etc. Some can also measure AC current, talpumas, induktyvumas, and kai kurie parametrai of semiconductors (pvz as ） Etc.
How to use a line multimeter
Pagal live conditions, use AC voltage or DC voltage pagal to the situation! Use resistance gear to detect circuit paths and short circuits without points!
The multimeter has a beep stop, which means using du probes to measure the same wire. If there is a short circuit, there will be no response. If there is a circuit, there will be a beep sound. Kartais, when the device pats is grounded poorly and the shell is live, the red probe of the multimeter can be placed on the black label of the shell to directly contact į įžeminimas. Stiprumas apvalkalas nuotėkis srovė gali būti išmatuotas prijungimas prijungimas jis grandinė serija už poilsis darbas darbas.
To check for circuit leakage, a megohmmeter (megger) should be used, as the voltage of the multimeter is lower (9V) and the voltage of the megohmmeter is higher (500V). Because the working voltage of the circuit is 220V, it is difficult to diagnose circuits with insignificant leakage. To use a digital meter to check for circuit leakage, you first need to cut off the power supply, discharge the circuit, ir matas jis su a pasipriešinimas lygis iš 2M. The normal display is 1 (begalinis).
Matavimas ar the circuit is in a connected state can be measured using a multimeter's ohm range. When measurement, it is necessary to select a range where the meter pointer is close to 0} ohms of deflection. If the circuit is in a circuit, one end (A end) of the circuit should be connected to a multimeter (red lead) at 100 ohms, and the black lead should be prijungtas prie the other end (B end) of the circuit to be measured. If the measured result is zero, it indicate that the circuit is connected, also known as a path. Only a path can current flow through the circuit; If the multimeter ohmmeter pointer at the A to B end of the circuit is not close to zero ohms, the circuit is in an open circuit state, and atjungimas vadinamas an atvira grandinė arba an atvira grandinė.
