AM.I.A.S3
SkillMeasure current.
From the FAA library
- Chapter 12: Fundamentals of Electricity & Electronics › DC Measuring Instruments › D’Arsonval Meter Movement
type of meter movement—first employed by the French scientist, d’Arsonval, in making electrical measurement—is a current measuring device, which is used in the ammeter, voltmeter, and ohmmeter. The pointer is deflected in proportion to the amount ... current through the coil. Basically, both the ammeter and the voltmeter are current measuring instruments, the principal difference being the method in which they are connected in a circuit. While an ohmmeter is also basically a current measuring instrument…
- Chapter 12: Fundamentals of Electricity & Electronics › Basic Circuit Analysis & Troubleshooting › Checking Resistance in a Circuit
Current Measurement Current is measured with the ammeter connected in the current path by opening or breaking the circuit and inserting the meter in series. [Figure 12-170] Standard practice is for the red meter lead to be installed ... meter is connected towards the positive voltage source. Ideally, the meter should not alter the current and influence the circuit and the measurements. However, the meter does have some effect because of its internal resistance that is connected with…
- Chapter 12: Fundamentals of Electricity & Electronics › DC Measuring Instruments › Current Sensitivity and Resistance
standard d’Arsonval meter, movement may have a current sensitivity of 1 mA and a resistance of 50 Ω. If the meter is going to be used to measure more than 1 mA, then additional circuitry is required to accomplish ... shunt resistor is to bypass current that exceeds the 1 mA limitation of the meter movement. To illustrate this, assume that the 1 mA meter in question is needed to measure 10 mA. The shunt resistor used should carry…