11/12
Electrical Installation
and Maintenance- NC II
(EIM)
Quarter 2
Module 1: Electrical Measuring
Instruments
TVL – Grade 11/12
Alternative Delivery Mode
Quarter 2 – Module 1: Electrical Measuring Instruments
First Edition, 2020
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Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writers: Francis E. Cadallo
Editors:
Reviewers:
Illustrator: Francis E. Cadallo
Layout Artist:, Fernando Galera
Management Team: Salustiano T. Jimenez
Dexter Y. Aguilar
Cherry D. Catadman
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11/12
EIM NC II
Quarter 2 – Module 1:
Electrical Measuring
Instruments
Introductory Message
For the facilitator:
Welcome to the EIM NC II-Grade 11/12 Alternative Delivery Mode (ADM) Module
on Electrical Measuring Instruments
This module was collaboratively designed, developed and reviewed by educators
both from public and private institutions to assist you, the teacher or facilitator in
helping the learners meet the standards set by the K to 12 Curriculum while
overcoming their personal, social, and economic constraints in schooling.
This learning resource hopes to engage the learners into guided and independent
learning activities at their own pace and time. Furthermore, this also aims to help
learners acquire the needed 21st century skills while taking into consideration
their needs and circumstances.
In addition to the material in the main text, you will also see this box in the body of
the module:
Notes to the Teacher
This contains helpful tips or strategies
that will help you in guiding the learners.
As a facilitator you are expected to orient the learners on how to use this module.
You also need to keep track of the learners' progress while allowing them to
manage their own learning. Furthermore, you are expected to encourage and assist
the learners as they do the tasks included in the module.
i
For the learner:
Welcome to the EIM NC II-Grade 11/12 Alternative Delivery Mode (ADM) Module
on Electrical Measuring Instruments
The hand is one of the most symbolized part of the human body. It is often used to
depict skill, action and purpose. Through our hands we may learn, create and
accomplish. Hence, the hand in this learning resource signifies that you as a
learner is capable and empowered to successfully achieve the relevant
competencies and skills at your own pace and time. Your academic success lies in
your own hands!
This module was designed to provide you with fun and meaningful opportunities
for guided and independent learning at your own pace and time. You will be
enabled to process the contents of the learning resource while being an active
learner.
This module has the following parts and corresponding icons:
What I Need to Know
This will give you an idea of the skills or
competencies you are expected to learn in
the module.
What I Know
This part includes an activity that aims to
check what you already know about the
lesson to take. If you get all the answers
correct (100%), you may decide to skip this
module.
What’s In
This is a brief drill or review to help you link
the current lesson with the previous one.
What’s New
In this portion, the new lesson will be
introduced to you in various ways such as a
story, a song, a poem, a problem opener, an
activity or a situation.
What is It
This section provides a brief discussion of
the lesson. This aims to help you discover
and understand new concepts and skills.
What’s More
This comprises activities for independent
practice to solidify your understanding and
skills of the topic. You may check the
answers to the exercises using the Answer
Key at the end of the module.
What I Have Learned
This
includes
questions
or
blank
sentence/paragraph to be filled in to
process what you learned from the lesson.
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What I Can Do
This section provides an activity which will
help you transfer your new knowledge or
skill into real life situations or concerns.
Assessment
This is a task which aims to evaluate your
level of mastery in achieving the learning
competency.
Additional Activities
In this portion, another activity will be given
to you to enrich your knowledge or skill of
the lesson learned. This also tends retention
of learned concepts.
Answer Key
This contains answers to all activities in the
module.
At the end of this module you will also find:
References
This is a list of all sources used in
developing this module.
The following are some reminders in using this module:
1. Use the module with care. Do not put unnecessary mark/s on any part of
the module. Use a separate sheet of paper in answering the exercises.
2. Don’t forget to answer What I Know before moving on to the other activities
included in the module.
3. Read the instruction carefully before doing each task.
4. Observe honesty and integrity in doing the tasks and checking your
answers.
5. Finish the task at hand before proceeding to the next.
6. Return this module to your teacher/facilitator once you are through with it.
If you encounter any difficulty in answering the tasks in this module, do not
hesitate to consult your teacher or facilitator. Always bear in mind that you are
not alone.
We hope that through this material, you will experience meaningful learning
and gain deep understanding of the relevant competencies. You can do it!
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What I Need to Know
This module was designed and written with you in mind. It is here to help
you master the knowledge and skills in Electrical Installation and Maintenance.
The scope of this module permits it to be used in many different learning
situations. The language used recognizes the diverse vocabulary level of students.
The lessons are arranged to follow the standard sequence of the course. But the
order in which you read them can be changed to correspond with the textbook you
are now using.
The module has only 1 lesson: Electrical Measuring Instruments
After going through this module, you are expected to:
1. Identify measuring tools for object or component to be measured
2. Select measuring tools in line with job requirements
1
What I Know
Choose the letter of the best answer. Write the chosen letter on a separate sheet of
paper.
1. A tool
a.
b.
c.
d.
measures the total voltage of the source/circuit.
Voltmeter
Ammeter
Ohmmeter
Wattmeter
2. A tool
a.
b.
c.
d.
which measures the total current running in a circuit.
Voltmeter
Ammeter
Ohmmeter
Wattmeter
3. A tool which measures, voltage in volts, DC current in milliamperes,
resistance in ohms, and to check the continuity of a conductor with the use
of its ohmmeter.
a. kWh meter
b. Many meter
c. Multiple-meter
d. VOM
4. A small instrument that provides direct reading of insulation resistance in
ohms or megohms.
a. Voltmeter
b. Ammeter
c. Megohmmeter
d. Wattmeter
5. An electric meter that measures the amount of electrical energy in kilowatts
per hour that was consumed in the house.
a. kWh meter
b. Many meter
c. Multiple-meter
d. VOM
2
Measuring tools
In this lesson, you will learn the different measuring tools and the purpose of each
tool.
What’s In
Instruction: Study the given picture and provide the actual measurement
shown of the measuring devices in a separate sheet. .
1.
2.
3.
3
What’s New
Complete the table below which shows some tools by filling in the
missing names and uses, you should do this activity prior to “What
is it”.
TOOL
NAME
USE
A tool which measures
the total current
running in a circuit
A________________
Voltmeter
4
What is It
Voltmeter
A tool measures the total voltage of the
source/circuit. The two test probes are
connected in the live and neutral terminal
Ammeter
A tool which measures the total current
running in a circuit, the test probes of this
meter are connected in series of the load to
get the correct measurement of electric
current
Analog Multi-tester/VOM
Digital Multi-tester/VOM
A
tool
which
measures, voltage in
volts, DC current in
milliamperes,
resistance in ohms,
and to check the
continuity
of
a
conductor with the
use of its ohmmeter
function. The term “VOM” refers to Volt-Ohm-milliammeter.
Megohmmeter/Megger tester
The Megger insulation tester is a small
instrument that provides direct reading of
insulation resistance in ohms or megohms.
5
Clamp meter
A clamp meter is an electrical testing tool that
combines a basic VOM with a current tester. Its
clamp measures current, and probes measures
volts, ohms, and milliamperes. The hinged jaw
attached to the device, allows electricians to
clamp the jaws around a wire then measure
current in that circuit without cutting the wire or
de-energizing it.
Kilowatt-hour meter/kWh meter
kWh meter is an electric meter that measures the
amount of electrical energy in kWh that was
consumed in the house.
6
What’s More
Instruction: In a separate sheet, identify the given picture of electrical
measuring tools and provide situations when will you use the tools in your
job as an electrician.
7
What I Have Learned
Instruction: In a separate sheet, answer directly the definition of the given
measuring tool.
Symbols
Definition
1. VOM
2. Clamp meter
3. Voltmeter
4. Ammeter
5. kWh meter
8
What I Can Do
Instruction: Study the given situation and select an appropriate electrical
measuring tool for the job. Write your answer in a separate sheet.
1. The electrician wants to measure the total
current of the circuit, he disconnects the one
wire in series of the load terminal for testing
(refer to the picture), what measuring tool he
needs to use for this job?
2. The electrician wants to measure the total voltage in the convenience
outlet, he also needs to measure the total resistance of the motor coil,
and check its power cord’s continuity, and measure the total DC
current in an auxiliary device, what specific tool he needs to use?
3. The electrician wants to measure the total current of the circuit,
without disconnecting the conductors, what measuring tool he needs
to use for this job?
4. The electric company needs to measure the total energy consumed by
the households, what measuring tool the company needs to use?
5. The electrician needs to measure the resistance of the circuit’s
insulator, what tool he needs to use?
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Assessment
Multiple Choice. Choose the letter of the best answer. Write the chosen letter
on a separate sheet of paper.
1. What does VOM stands for?
A. Very open meter
B. Valve-on-Wheels
C. Volt-ohm-milliammeter
D. Voltmeter,ohmmeter,multimeter
2. What does kWh stands for?
A. kilowatt-hour
B. kindwondhep
C. Kilogram
D. Kilometer per hour
3. Which of the following measuring tools that can carry multiple
functions?
A. Voltmeter
B. Ammeter
C. VOM
D. kWh
4. Which of the following measuring tools that can measure amperes
without disconnecting the flow of the current nor cutting the wires?
A. Voltmeter
B. Ammeter
C. Multi-meter
D. Clamp meter
5. Which of the following measuring tools that can measure total voltage
only?
A. Voltmeter
B. Ammeter
C. Multi-meter
D. Clamp meter
10
Additional Activities
Instruction: Study the circuit below select the selector knob of the VOM by
drawing a line and connect the test probes to measure the voltage. Draw your
representation of answer. Write your answer in a separate piece of paper.
CB
C.O
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Answer Key
1.
2.
3.
4.
5.
C
A
C
D
A
1.
2.
3.
4.
5.
Assessment
A
B
D
C
A
What I Know
References
1. TR – Electrical Installation and Maintenance NC II (Amended)
Promulgated, ENGR. HIPOLITO A. LEONCIO, PEE- Managing
Director, Dec. 16, 2015
2. Learner’s Material, Electrical Installation and Maintenance, Roman
A. Cabusora, Jr., Marino C. Cueto., First Edition, 2014
3. K-12 Industrial Arts, Electrical Installation and Maintenance,
Curriculum Guide, May 2016
12
For inquiries or feedback, please write or call:
Department of Education – Bais City Division, Learning Resource
Management Section
Laurel St. Bais City,Negros Oriental, Philippines, 6206
Telefax: (035) 402-3172, 522-1907
Email Address: bais.city@deped.gov.ph