Is a multimeter or megohmmeter easier to use to check the circuit?
Iċċekkja l- AC u DC vultaġġ ta ' il- linja ; it huwa konvenjenti għal użu a pointer multimeter jew a sett multimeter għal iċċekkja il - kontinwità ta ' il-linja .
Jekk int check the AC current in the line, it is better to purchase a digital clamp meter for convenience.
Biex check the circuit, use a megohmmeter for motors, cable conductors, etc. li need to measure insulation resistance;
Huma jiddeterminaw l- ambitu ta ' użu skond a tagħhom funzjonijiet , u il megohmmeter huwa l-aħjar għażla għal ittestjar l- insulazzjoni ta ' elettriku tagħmir ; it ma jistax jiġi sostitwit minn a multimeter; għax ir-reżistenza ir-reżistenza ta ' l- elettriku tagħmir li jkun ittestjat huwa relattivament kbir % 2c fil il-firxa ta ' diversi megohms. Jew aktar minn għexieren ta' megohms. L-iskala ta ' il multimeter huwa ħafna mhux preċiż f' din il-firxa . In addition, the power supply voltage used by the multimeter when measuring resistance is very low (below 9V), and the resistance value presented at low voltage does not reflect the true value of the insulation resistance resistance under under high voltage. Therefore, although the multimeter can also measure the insulation resistance value of several thousand ohms, the insulation resistance value resistance value it measures can only be used as a reference. Meta testing the insulation resistance of electrical equipment, only a high-voltage and low-current megohmmeter (250~2500V) can be used for measurement, and a multimeter cannot be used.
A multimeter is a multi-funzjonali, multi-range portable instrument. According to different measurement principles and display methods, it can be divided in pointer multimeters and digital multimeters.
Multimetri can generally be used to measure DC current, DC voltage, AC voltage, resistance, level, etc. Some can also measure AC current, capacitance, inductance and the amplification factor of transistors, etc., so they are indispensable for electronic engineering, electromechanical and maintenance departments. It is a general-purpose tool and is widely used in electrical measurements.
Analog multimeter, ukoll magħruf as analog multimeter, is a multi-purpose measuring instrument with the meter head as the core component. The measured value is read by the pointer of the meter head. It can continuously observe the dynamic changes of the measured value. MF47 pointer type multimeter As shown below.
Il diġitali multimeter huwa strument li jikkombina elettroniku teknoloġija u mikrokompjuter teknoloġija. Huwa użi LCD skrin għal direttament wiri imkejjel valuri , li fundamentalment bidliet iċ-ċirkwit u struttura ta ' il - tradizzjonali analog multimetru. It has small size, light weight, wide measurement range, It has the advantages of multiple measurement functions, intuitive reading, fast measurement speed, high measurement accuracy, high sensitivity, and strong overload capability.
