smzoqa.blogg.se

In this, a resistor is placed across the meter movement called as shunt which limits the amount of current passes through the meter. The working of the analog ammeter is same as that of PMMC meter. That’s why ammeters also referred as in-line ammeters.Ĭurrent Measurement using Analog Multimeter Thus, ammeter must be connected in series or in line with circuit in which current being measured. This high current will lead to the destruction of ammeter. Suppose this meter with 0.1 ohms resistance is connected across the 240 supply, the current flow would be around 2400 Amps (240/0.1 = 2400 A). If the meter is connected in parallel to the supply unknowingly, this low resistance only limits the current flow through the meter. It is to be noted that ammeter is a low resistance device and typically the impedance is less than 0.1 ohm. Procedure to Measure Current using Clamp Meterīoth AC and DC currents can be measured with a multimeter by connecting the meter in series with the circuit, in which the current is measured provided the current in that circuit is limited or controlled by a load or appropriate values of resistance.Measurement of Current with Clamp Meter.DC/AC Current Measurement using Digital Multimeter.