Lesson 2

LEARNING OUTCOMES: At the end of this Lesson, you are expected to do the following:

• LO 1. select measuring tools and instruments; and

• LO 2. carry out measurements and calculations.

DEFINITION OF TERMS

Amperage (Amps) - a unit of measurement of electrical current flow

Ampere - a unit of measurement which describes the amount of electric current

passing a certain point at a particular time

Centimeter - hundredth of a meter

Inch - a portion of a foot, which is an English unit of linear measurement

Megger - an instrument used to measure the insulation resistance of conductors or wire. It gives measurement in ohms or meg-ohms

Millimeter - one-thousandth of a meter

Multi-tester - an electrical measuring instrument used to measure the voltage, the resistance or the current of a circuit. It is connected either through parallel or series with the circuit depending on what to measure

Ohm - the unit of measurement used to express resistance

Ohmmeter - an instrument used to measure resistance in ohms

Volt - a unit of measurement of electrical pressure or voltage

Voltmeter - an instrument specially designed for measuring voltage

Wire Gauge - used to measure the diameter of magnetic wire