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DESCRIPTION
Basic Electricity
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CHAPTER 2
Electronic test Instrument
OBJECTIVES
1. Identify the different types of electronic Test Instruments;
2. Describe each type of electronic Test Instrument.
3. Demonstrate on how to properly use each electronic instrument.
MULTI-TESTER
The multi-tester or Multi-meter is a sometimes called VOM(Voltmeter, Ohmmeter, Milliammeter) is the best instrument that can measure voltage, resistance, and current.
TWO GENERAL TYPES OF MULTI-TESTER
1. ANALOG MULTI-TESTER2. DIGITAL MULTI-TESTER
MULTI TESTER
ANALOG MULTI-TESTER – Has a moving coil assembly which is characterized by a needle pointer.
ANALOG MULTI-TESTER
POINTER SCALE
ZERO POINTER OHM ADJUSTERADJUSTER
SELECTOR
ALTERNATING CURRENT
RESISTANCE
DIRECT CURRENT
DIRECT CURRENTAMPERE
DIGITAL MULTI TESTER
PIN/PROBE
GAME PLAY
MATERIALS
1. ANALOG/DIGITAL Multi-Tester2. COMPUTER POWER SUPPLY3. BATTERY CHARGERS/BATTERY4. AUTOMATIC VOLTAGE
REGULATOR5. RESISTORS
MECHANICS
There are 4 game activities namely, Reading of Resistance, Alternating Current, Direct Current and Milliampere.
Each game activity has a corresponding points.
Each group should select 3 participants per game activity.
The highest group who will earned the highest total points is free to leave the room after the class as a reward, While the group who earned the lowest will clean and arrange the room as a punishment.
GROUP TEAMS
APL LEA SARAH BAMBOO
TEAM SCORES
TEAMS RESITANCE
ALTERNATING CURRENT
DIRECT CURRENT
TOTAL RANK
APL 0
LEA 0
SARAH 0
BAMBOO 1
OTHER TYPES OF TESTER GALVANOMETER Are the basic components of many power and current meters.
WHEATSTONE BRIDGE
Is a resistance measuring device. This particular instrument measures resistance values from 1Ohms to 11.01 Ohms
OSCILLOSCOPE
A unique instrument designed to graphically time varying voltage and current values.
WATTMETER
A meter that indicates real power.
THERMOCOUPLE AMMETER Consist of DC moving coil meter
connected across the junction of a thermocouple.
ELECTROSTATIC VOLTMETER Construct
ed in the form a variable capacitor consisting of a pair of reading and stationary plate.
HOTWIRE AMMETER
It consist of a spring connected to a resistance wire in which current passes through.