AMMETERS Test Instruments & Measuring DevicesAMMETERSMeasurement of current being supplied to or from a component is measured byan ammeter.EO 1.2 STATE the electrical parameters measured by each ofthe following in-place measuring devices:b. AmmeterEO 1.3 EXPLAIN how the following electrical test equipmentand measuring devices are connected to a circuit:b. AmmeterAmmeterThe ammeter measures electric current. It may be calibrated in amperes, milliamperes, ormicroamperes. In order to measure current, the ammeter must be placed in series with the circuitto be tested (Figure 6).When an ammeter is placed in series with a circuit, it will increase the resistance of that circuitFigure 6 Ammeterby an amount equal to the internal resistance of the meter Rm. Equation (14-3) is themathematical representation of the current without the meter installed.(14-3)IoVRoES-14 Page 10 Rev. 0
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
