MEASURING TOOLS AND INSTRUMENTS.pptx

MEASURING TOOLS AND INSTRUMENTS

1. MEASURING TOOLS AND INSTRUMENTS ELECTRICAL INSTALLATION AND MAINTENANCE

2. PULL PUSH RULE Pull-Push Rule is a measuring tool used to measure the length of an object in centimeter and inches

3. Wire Gauge Wire Gauge is used in determining the size of wires/conductors. The gauge ranges from 0 to 60 awg ( American wire gauge).

4. VERNIER CALIPER a linear measuring instrument consisting of a scaled rule with a projecting arm at one end, to which is attached a sliding vernier with a projecting arm that forms a jaw with the other projecting arm.

5. Micrometer Micrometer is used to measure the diameter of wires/conductors in circular mils. It can measure small and big sizes of wires and cables.

6. Test Light Test Light is a pocket size tool used to test the line wire or circuit if there is current in it.

7. VOLT METER Voltmeter is an instrument used to measure electrical pressure or voltage of a circuit. The unit of measure is volt (v). This is connected across or parallel to the circuit.

8. AMMETER Ammeter is an instrument used to measure the amount of electrical current intensity in a circuit. The unit of measure is ampere (a). It is connected along or series to the circuit.

9. OHM METER Device used to measure resistance

10. Clamp Tester Clamp Ammeter is also called tong-tester. It is used to measure current flowing in a conductor. It is clamped or hanged in a conductor

11. MULTI-TESTER Volt-Ohmmeter (VOM) otherwise called as Multi-tester; is used to measure the voltage, resistance and current of a circuit. It is connected in parallel or series with the circuit depending on what to measure.

12. Megger Megger  insulation  tester  is a small, portable instrument that gives you a direct reading of insulation resistance in ohms or megohms . For good insulation, the resistance usually reads in the megohm range

13. Phase Sequence Tester Phase sequence  meter is used for detecting the  sequence  of the supply in three- phase electric circuits

14. GALVANOMETER A n instrument for detecting and measuring small electric currents