Y2 - Module 2 - Performing Mensuration and Calculation.doc

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Unit of Competency: PERFORMING MENSURATION AND
CALCULATION
Module No. 2 Module Title: PERFORMING MENSURATION AND
CALCULATION
Republic of the Philippines
Department of Education
PUBLIC TECHNICAL -VOCATIONAL
HIGH SCHOOLS

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TABLE OF CONTENTS
Page
How to Use this Module..........................................................................3
Introduction ...........................................................................................4
Technical Terms .....................................................................................5
Learning Outcome 1: Select Measuring Instruments...............................6
 Learning Experience………………………………………………………….7
 Information Sheet 1.1 ...................................................................8
 Self-Check 1.1 ............................................................................14
Learning Outcome 2: Carry out Measurement and Calculation .............17
 Learning Experience ……………………………………………………….18
 Information Sheet 2.1 .................................................................19
 Job Sheet 2.1..............................................................................21
 Performance Test 2.1 ..................................................................26
o Observation Checklist 2.1..................................................30
o Questioning Checklist 2.1..................................................31
Learning Outcomes 3 Maintain Measuring Instruments........................32
 Learning Experience ……………………………………………………….33
 Information Sheet 3.1 .................................................................34
 Self Check 3.1.............................................................................36
Assessment Plan ..................................................................................38
Answer Keys.........................................................................................39
Acknowledgment .................................................................................41

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HOW TO USE THIS MODULE
Welcome to the Module “Performing Mensuration and Calculation”.
This module contains training materials and activities for you to
complete.
The unit of competency “Perform Mensuration and Calculation”
contains the knowledge, skills and attitudes required for Consumer
Electronic Servicing required to obtain the National Certificate (NC)
level II.
You are required to go through a series of learning activities in order
to complete each of the learning outcomes of the module. In each
learning outcome there are Information Sheets and Activity Sheets. Do
these activities on your own and answer the Self-Check at the end of
each learning activity.
If you have questions, don’t hesitate to ask your teacher for
assistance.
Recognition of Prior Learning (RPL)
You have already some basic knowledge and skills covered in this
module because you have been working for some time; as you have
already completed training in this area.
If you can demonstrate competence to your teacher in a particular
skill, talk to your teacher so you don’t have to undergo the same training
again. If you have a qualification or Certificate of Competency from
previous trainings show it to him/her. If the skills you acquired are
consistent with and relevant to this module, they become part of the
evidence. You can present these for RPL. If you are not sure about your
competence skills, discuss this with your teacher.
After completing this module, ask your teacher to assess your
competence. Result of your assessment will be recorded in your
competency profile. All the learning activities are designed for you to
complete at your own pace.
In this module, you will find the activities for you to complete and
relevant information sheets for each learning outcome. Each learning
outcome may have more than one learning activity.
This module is prepared to help you achieve the required competency,
in receiving and relaying information. This will be the source of
information that will enable you to acquire the knowledge and skills in
Performing Mensuration and Calculation independently at your own pace
with minimum supervision from your teacher.

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Program/Course CONSUMER ELECTRONIC SERVICING NC II
Unit of Competency PERFORM MENSURATION AND CALCULATION
Module Title PERFORMING MENSURATION AND CALCULATION
INTRODUCTION:
This module contains information and suggested learning activities in
Performing Mensuration and Calculation. It covers the knowledge, skills
and attitudes required to perform mensuration and calculation in
electronics.
This module consists of three (3) learning outcomes. Each learning
outcome contains learning activities supported by instructional sheets.
Before you perform the instructions, read the information sheets and
answer the self-check and activities provided to ascertain to yourself and
your teacher that you have acquired the knowledge necessary to perform
the skill portion of the particular learning outcome.
Upon completing this module, report to your teacher for assessment
to check your achievement of the knowledge and skills required in this
module. If you pass the assessment, you will be given a certificate of
completion.
SUMMARY OF LEARNING OUTCOMES:
Upon completion of the module, you should be able to:
 LO1. select measuring instruments;
 LO2. carry out measurements and calculation; and
 LO3. maintain measuring instruments.

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TECHNICAL TERMS
AC/DC. It is an equipment that operates on either an AC or DC power source.
Alternating Current. It is an Electric current that rises to a maximum in one
direction which falls back to zero and then rises to a maximum in the opposite
direction
Ampere . It is a unit of electrical current.
Circuit. It is a system of conductors and devices in which current can exist.
Current. It is a result of electrons in motion.
Diode. It is a two terminal device that conduct current more easily in only one
direction.
Direct Current. It is a type of current that the movement of electrons is in one
direction.
EMF. It is electromotive force.
Kilo. It is a prefix with a mathematical equivalent of one thousand times.
Load Resistance. It is the basic part electric circuit where power is dissipated
in the form of heat.
Mega. It is a prefix with mathematical equivalent of one million times.
Micro. It is a prefix with a mathematical equivalent of one millionth part.
Milli. It is a prefix with a mathematical equivalent of one thousandth part.
Ohm. It is a unit of electrical resistance.
Power. It is the rate of doing work or the rate at which energy is used.
Resistance. It is the property of a material that opposes the movement of
electrons.
Transformer. It is an inductor with two or more windings
Volt. It is the unit of an electrical pressure.
Voltage. It is an electrical pressure that moves the electrons in wire.
Voltage Drop. It is the voltage across a component caused by the resistance
and the current through.
Watt. It is the unit of an electric power.

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Learning Outcome 1: Select measuring instruments.
Assessment Criteria:
1. Uses of measuring tools are explained.
2. The scale of measuring instrument is interpreted.
3. Measuring instruments are specified per job requirements.
Program/Course CONSUMER ELECTRONIC MECHANIC NCII
Module
PERFORMING MENSURATION AND
CALCULATION

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Learning Outcome 1: Select measuring instruments.
Learning Activities Special Instructions
1. Read the Information Sheet
No. 1.1 on identifying the
different measuring tools and
instruments.
2. Do the Self-Check 1.1 to
check your knowledge on
the different measuring
tools and instruments.
3. Compare your answers with
the Answer Key.
4. If you were not able to
answer all the questions
correctly, go over again the
Information Sheet.
5. If you have now perfected
answering the Self-Check
1.1, you can proceed to the
next learning outcome.
 You can ask assistance from your
teacher to show you and explain
further the topic you don’t
understands well.
 Try to answer the Self-Check
without looking at the Information
Sheet.

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INFORMATION SHEET 1.1
Identifying the different measuring tools and instruments
COMMONLY USED MEASURING TOOLS AND INSTRUMENTS
The following are the most commonly used measuring instruments in
consumer electronic servicing.
Component Function of Each Component
A steel rule is used in geometry, technical
drawing and engineering/
building to measure distances and/or to rule
straight lines.
Analog multimeters are sometimes referred
to as "volt-ohm-meters", abbreviated as VOM
and it is an electronic measuring instrument
that combines several functions in one unit.
They are traditionally harder to be used
because you must select the type and range of
voltage you are testing. Find proper scale on
the meter face and the estimate the voltage as
the needle swings into action.
Digital multimeters are usually referred to as
"digital-multi-meters" abbreviated as DMM.
This displays the voltage in clear numerals and
with a greater precision than most analog
meters.
READING THE SCALE OF LINEAR MEASURING INSTRUMENTS
There are two systems of linear measurement used in electronic
drawings. They are the English and Metric. The English system uses
inches while the Metric system uses millimeter and centimeter.
In the English system, an inch is graduated in 16th, 8th, 4th, and
2nd. There are 16/16, 8/8, 4/4, 2/2 in 1 inch. There are 12 inches in 1
foot.
In the Metric system, the centimeter is graduated in millimeter.
There are 10 millimeters in 1 centimeter. There are 100 centimeters in 1
meter.

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How to read the Linear Measurements in the English System
The first graduation is 1/16; the second is 1/8; the third is 3/16; next
graduation is ¼ followed by 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16,
3/4, 13/16, 7/8, 15/16, and 1 inch. After 1 inch, the graduation is
written as 1 and 1/16, 1 and 5/8, and etc.
How to read the Linear Measurements in the Metric System
The first graduation is 1 millimeter or 1mm. For every graduation,
the equivalent is 1 millimeter. After 1 centimeter or 1cm., it is written as
1.2 cm., 1.8cm., and etc. In terms of meter, 1 meter and 10 centimeters
is written as 1.10m.
READING THE SCALE OF VOM
Ohmmeter Ranges
x1 ohm
x10 ohms
x1k ohms
x10k ohms
x100k ohms
Minor divisions and their
equivalents
Minor
Divisions
Equivalent
0-2 0.2
2-10 0.5
10-20 1
20-50 2
50-100 5
100-500 20

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How to read the scale
The needle of the meter points at ten. If the range is set to x1 ohm,
multiply 10 by 1 which is equivalent to 10 ohms. If the reading is 10, the
equivalent of one minor division from 10 - 20 is 1. So, 10x1 = 10 ohms.
AC Voltage Scale
RANGE MAJOR
DIVISION
MINOR
DIVISION
10 2 0.2
50 10 1
250 50 5
1000 200 20
ACV SCALE
Figure 2. ACVoltage Scale
How to read the measured voltage
After selecting the desired range which is 250 and connecting the
two test prods to the AC outlet, the pointer stops at point in the ACV
scale. Read it from left to right. For example, it stopped at 43, multiply it
by the equivalent which is 5. The ACV measurement is 215 volts AC.
Example:
43 x 5 = 215 volts
Where: 43 is the point to which the pointer stopped and 5 is the
equivalent of each minor division.

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DC Voltage Scale
DCV SCALE
RANGE MAJOR
DIVISION
MINOR
DIVISION
0.1 0.02 0.002
0.25 0.05 0.005
2.5 0.5 0.05
10 2 0.2
50 10 1
250 50 5
1000 200 20
DCV Scale
How to read the measured voltage
After selecting the desired range and connecting the two test prods
to the designated test points, the pointer stops at a point in the scale. If
the pointer stops at minor division 15 and the range used is x50,
multiply 15 by 1, so the reading is 15 volts DC.
Example:
15 x 1 = 15 volts
Where 15 is the minor division to which the pointer stopped at 1 is the
equivalent of one minor division if the range is 50V DC.

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DC mA Voltage Scale
DC mA SCALE
RANGE MAJOR
DIVISION
MINOR
DIVISION
50 uA 10 1
2.5 mA .5 .05
25 mA 5 0.5
0.25 A 0.05 .005
Figure 4. DC mA Scale
How to read the DC mA scale
After selecting the desired range and connecting the two test prods
to the designated test point, the pointer stops at a point in the scale. If
the pointer stopped at minor division 6 and the range used is 2.5,
multiply 6 by .05 so the reading is .3 mA.
Example:
6 x .05 = 0.3 mA
Where: 6 is the minor division to which the pointer stopped .05 is the
equivalent of one minor division using 2.5 range.
SPECIFYING THE MEASURING TOOLS AND INSTRUMENTS
TOOLS TYPE LENGTH/
DIAMETER
MANUFACTURER
RULER
Wood 12” PHILIPPINES
Plastic 24” CHINA
Steel 36” JAPAN & USA

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General Specification (VOM)
Items Specification
Drop shock proof
Taut-band structure is adopted in the meter
section. The meter section is designed to
withstand shock.
Circuit protection
The circuit if protected by fuse even when
voltage of a to AC 230V is impressed on each
range for 5 seconds.
Internal battery R6 (IEC) or UM-3 1.5V x2
Internal fuse 0.5A/250V 5.2 mm diaX20mm
Standard calibration
temp. and humidity
range
23±2°C 45~75% RH
Operating temperature
and humidity range
0~40°C, 80% RH max., no condensation
Withstand voltage
3k V AC (1 min.) between input terminal and
case
Dimensions and weight 159.5X129X41.5mm/approx.320g
Accessories One copy of instruction manual, Hand strap
Measurement Range and
Accuracy
Function, full scale value and accuracy

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SELF-CHECK 1.1
Measuring Tool
General Direction: Write your answers on another sheet of paper. Do
not write anything in this module
I. Indicate the scale value that corresponds to the given number.
a. Read the graduated scale of a ruler using the illustrated questions
below.
b. Read the marked minor divisions in the ohmmeter scale and compute
the resistance using the indicated range in each number.
The Ohmmeter Scale
1. x1 6. x10
2. x10 7. x1k
3. x1k 8. x10k
4. x10k 9. x10
5. x1 10. x1k

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c. Read the marked minor division in the ACV scale and compute the
ACV reading using the indicated range in each number.
ACV Scale
1. 10V AC 6. 50V AC
2. 50V AC 7. 250V AC
3. 250V AC 8. 1000V AC
4. 1000V AC 9. 50V AC
5. 10V AC 10. 250V AC
d. Read the marked division in the DCV scale and compute the reading
using the indicated range.
DCV Scale
1. 0.1V DC 6. 250V DC
2. 0.25V DC 7. 1000V DC
3. 2.5V DC 8. 2.5V DC
4. 10V DC 9. 10V DC
5. 50V DC 10. 50V DC

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e. Read the marked division in the DCV Scale and compute the reading
using the indicated range.
DC mA Scale
1. 50 uA 6. 2.5 mA
2. 2.5 mA 7. 25 mA
3. 25 mA 8. 0.25 A
4. 0.25 A 9. 25 mA
5. 50 uA 10. 2.5 mA
III. How do you specify a (VOM) Multi-tester?
Items Specification

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Module Title PERFORMING MENSURATION AND
CALCULATION
Learning Outcome 2: Carry out measurements and calculations.
ASSESSMENT CRITERIA:
1. Calculations needed to complete task are performed.
2. Calculations involving conversion of units are interpreted.
3. Measurements are read based on the specific range setting of the
tools.
4. Accurate measurements are obtained for a job.

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Learning Outcome 2: Carry out measurements and calculations.
1. Read the Information Sheet
No. 2.1 on measurement
and calculation.
2. Do the Self-Check No. 2.1
to check your knowledge on
the different measurements
and calculations.
the Answer Key.
answer all the questions, go
over again the Information
Sheet No. 2.1.
5. If you have answered all the
questions, read Information
Sheet No. 2.2 on the
Mathematical Calculation.
6. Do the Self-Check No. 2.2
to check your knowledge on
the different mathematical
computations.
the Answer Key.
answer all the questions, go
over again the Information
Sheet 2.2.
questions, perform the Job
Sheet 2.1 on Calibration,
Procedure and Technique
for accurate measurements.
10. Do the Performance Test to
evaluate your skills on
calibration, procedure and
technique for accurate
measurements.
11. If you were not able to get
some of the items in the
Performance Checklist, go
over again to the Job Sheet.
12. If you did get all the items in
the Performance Checklist, you
can proceed to the next learning
outcome.
 You can ask the assistance from
your teacher to show you and
explain to you further the topic
you cannot understand well.
without looking at the
Information Sheet

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MEASUREMENT AND CALCULATION
A. COMMON MATHEMATICAL PREFIXES
COMMON MATHEMATICAL PREFIXES
PREFIX SYMBOL MATHEMATICAL EQUIVALENT
Exa E 1018 or (1 000 000 000 000 000 000)
Peta P 1015 or (1 000 000 000 000 000)
Tera T 1012 or (1 000 000 000 000)
Giga G 109 or (1 000 000 000)
Mega M 106 or (1 000 000)
Kilo K 103 or (1 000)
Hecto H 102 or (100)
Deka Da 101 or (10)
Deci d 10-1 or (0.1)
Centi c 10-2 or (0.01)
Milli m 10-3 or (0.001)
Micro u 10-6 or (0. 000 001)
Nano n 10-9 or (0. 000 000 001)
Pico P 1012 or (0. 000 000 000 001)
Femto F 1015 or (0. 000 000 000 000 001)
Atto A 1018 or (0. 000 000 000 000 000 001)
Example:
1. CONVERSION OF MULTIPLES INTO STANDARDS UNITS
1. 4 GHz (x 1, 000, 000, 000) = 4, 000, 000, 000 Hz
2. 10 Mega Ohms (X 1,000,000) = 10, 000, 000 
3. 27 KV (X 1,000) = 27, 000 V
4. 50 KW (X 1,000) = 50, 000 W
5. 0.5 KA (X 1,000) = 500 A
2. CONVERSION OF STANDARD UNIT INTO MULTIPLE UNITS
1. 3,300  (÷ 1,000) = 3.3 K
2. 10,000, 000 Hz (÷ 1,000,000) = 10MHz
3. 3,580, 000 Hz (÷ 1,000,000) = 3.58 MHz
4. 100,000, 000 W (÷ 1,000,000) = 100 MW
5. 12,000 V (÷ 1000) = 12 kV
3. CONVERSION OF SUB-MULTIPLES INTO STANDARD UNITS
1. 5,000 mV ( 1,000) = 5 V
2. 400 A ( 1,000,000) = 0.0004 A
3. 750 mW ( 1,000) = 0.0.75 W
4. 68, 000 F ( 1,000,000) = 0. 068 F
5. 40 mH ( 1,000) = 0.04 H

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4. CONVERSION OF STANDARD UNITS INTO SUB –MULTIPLES UNITS
1. 0.000050 V (X 1,000) = 0.050 mV
2. 0.0004 A (X 1,000,000) = 400 A
3. 0.00020 A (X 1,000) = 200 A
4. 0.12 H (X 1,000,000) = 120,000 H
5. 0.175 W (X 1000) = 175 mW
5. CONVERSION OF SUB-MULTIPLES UNITS TO ANOTHER SUB-
MULTIPLE UNITS
1. 0.18 mA (X 1000) = 180 A
2. 40.000 A ( 1000) = 40 mA
3. 10 Pf ( 1000,000) = 0.00001 f
4. 0.00047 f (X 1,000,000) = 470 Pf
5. 0.68 mH (X 1000) = 680 H
6. CONVERSION OF UNITS (ENGLISH TO METRIC AND VISE-VERSA)
Length
1. 1 mile = 1.61 kilometers
2. 1 yard = 0.914 meter
3. 1 foot = 0.305 meter
4. 1 inch = 2.54 centimeters
5. 1 kilometer = .62 mile
6. 1 meter = 1.09 yard
7. 1 meter = 3.28 feet
8. 1 centimeter = 0.394 in
Volume
1. 1 gallon = 3.79 liters
2. 1 quart = 0.946 liter
3. 1 liter = 0.264 gallon
4. 1 liter = 1.06 quarts
Weight
1. 1 pound = 0.454 kilogram
2. 1 ounce = 28.35 grams
3. 1 kilogram = 2.2 pounds
4. 1 gram = 0.0353 ounce

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JOB SHEET 2.1
CALIBRATION, PROCEDURE AND TECHNIQUES
FOR ACCURATE MEASUREMENTS
A. CALIBRATING THE VOLT- OHM -MILLIAMMETER
1. Examine the front panel of the VOM assigned to you. Locate the
function switch. This will be a multifunction switch with several
positions for measuring VOLTS, OHMS, & AMPS.
2. Jacks are located on the front panel for insertion of the test lead into
the jack marked “Common” , or maybe just “-”.
3. Insert the red test lead into the jack marked “VOLTS/OHMS” or
simply “+”. These leads will be used for connecting to circuitry and/or
components.
4. Examine the meter face. There should be several scales with numbers
on them. (Note: There is usually one scale for resistance located at
the top of the meter face and several scales for AC and DC voltages
located below the resistance scale.
5. There may also be a front panel switch for selecting polarity and type
of voltage measurement. This will be labeled “ – DC,” “+DC”, and “AC”
If your VOM has this type of switch, place it in the “ + DC” position.
6. On the meter face, there will be a screwdriver adjustment for zeroing
the meter movement. Locate this adjustment and adjust the meter
movement to zero at left side of the meter.
7. Place meter function switch on lowest OHMS position (usually Rx1).
Touch both test leads together, and observe movement of needle. It
should move to right side of scale. Adjust for zero on right side using
the “Zero Ohms” adjust on meter.
8. When finished, move the function switch to the highest voltage
setting. This will preserve the batteries in the meter as well as protect
against accidental damage to the meter if the next technician forgets
to change the function switch setting.
B. USING THE DIGITAL MULTIMETER
1. Examine the front panel of the digital multimeter assigned to you.
Locate the function switch or switches. This is the switch that
selects whether VOLTS, OHMS, or AMPS are to be read on the meter
face.
(Note: Many DMMs have several other functions, such as transistor
or diode testing, capacitor testing, frequency counting, etc. We will
focus on the VOLTS< OHMS and AMPS in this section).
2. Familiarize the selections available in VOLTS, OHMS and AMPS.
3. Insert the black test lead into the jack labeled “COMMON -” on the
front panel. Some meters simply call this jack “-” or “Common”.
4. Insert the red test lead into the “VOLTS/OHMS” jack to lowest
resistance setting. Some meters simply call this test jack “+”.
5. Rotate the function switch to lowest resistance reading.
6. Connect test leads together and observed reading on the meter face.

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C. MEASURING RESISTANCE WITH THE VOLT – OHM –
MILLIAMMETER
1. Insert the banana plug end of the black test lead into the meter’s
front panel jack labeled “Common”. On some meters this jack is
simply labeled “-”.
2. Insert the banana plug end of the red test lead into the front panel
jack labeled “+”. On some meters this jack is labeled “Volts/Ohms”.
3. Observe the position of the meter pointer. The pointer should be
exactly aligned with the “Infinity” symbol on the left side of the
meter face. (Note: this will correspond to the 0 reading on any of
the voltage scales.) The “Infinity” symbol looks like a number eight
laying on its side.
4. If the pointer is not aligned properly, adjust the mechanical zero
with s small screw driver. Be careful not to force the adjustment
beyond its limits, or to be rough in performing the adjustment. The
meter movement could be damaged.
5. Place the function switch on the lowest resistance scale. On most
VOMs this will be RX1. This simply means R times 1, or, in other
words the numbers on the resistance scale are to be read directly.
On most meters the Ohms scale will be the top scale. Zero is to the
extreme right on this scale, and infinity is to the extreme left.
6. Connect the red lead to the black lead.
7. Observe the reading on the VOM meter face. It should be near zero,
on the RIGHT side of the meter face. If the reading of zero Ohms
using the “Ohms Adjust” or “Zero Ohms Adjust” on the front panel
of the meter.
8. Place the meter lead across the leads of the 47 ohm resistor in your
standard parts kit.
9. Repeat step 8 for the 10 ohm resistor.
10. Repeat step 8 for the 150 ohm resistor.
11. Place the meter in a higher scale that will allow you to read a 1
Ohm resistor
12. Repeat steps 6 and 7 to zero the meter on the new scale.
13. Repeat steps 8 and 9 for the 1 kilo ohm, 4.7 kilo ohm, and 10 kilo
ohm resistors.
14. Repeat this procedure for the 22 kilo ohm, 47 kilo ohm, 150 kilo
ohm, 2.2 mega ohm, and 4.7 mega ohm resistors, changing scale
as a appropriate to obtain the best readings (Note: The best
accuracy on the VOM resistance scales will be in the lowest half of
the meter face – the right side of the meter face.

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D. MEASURING RESISTANCE USING DIGITAL MULTIMETER
panel jack, labeled “Common”.
jack labeled “+”.
3. Place the function switch on the lowest resistance scale.
4. Connect the red lead to the black lead.
5. Observe the reading on the DMM meter face. It should be near
zero. If it is not, check your set up. Some DMMs include a “Zero
Adjust” at the front panel. Most do not, choosing instead to set the
meter for zero internally. If no problem is found (dead battery,
blown fuse, defective meter lead, etc.), notify the teacher. Most
DMM will read a few tenths of an ohm of resistance. This simply
represents the resistance of the test leads, and should be
considered “zero” for your meter.
6. Place the meter leads across the leads of the 47 ohm resistor in
your standards parts kit. Refer to the resistor color code to aid in
identifying each resistor.
7. Repeat steps 6 and 7 for the 10 ohm resistor.
8. Repeat steps 6 and 7 for the 150 ohm resistor.
9. Place the meter on a higher scale that will allow you to read a 1 kilo
ohm resistor.
10. Repeat step 5 to zero the meter on the new scale.
11. Repeat steps 6 and 7 for the 1 kilo ohm, 4.7 kilo ohm, and 10m
kilo ohm resistor.
12. Repeat this procedure for the 22 kilo ohm, 47 kilo ohm, 150 kilo
ohm, 2.2 mega ohm and 4.7 mega ohm resistors, changing scales
as appropriate to obtain the best readings.
E. MEASURING DC CURRENT WITH VOLT-OHM-MILLIAMETER
front panel jack labeled “Common”.
2. Insert the banana plug and of the red test lead into the front panel
exactly aligned with the 0 on the left side of the meter face. If the
meter has a mirrored meter face, align the needle (pointer) with its
image in the mirror for best accuracy.
with a small screw driver. Be careful not to damage the meter face
cover or the small plastic screw. Do not force the adjustment
beyond its limit.
5. Calculate the value of current that will flow in the circuit depicted
and schematic one and record it. Place the function switch on a
high enough scale to measure calculated current.
6. Connect the circuit showed in the schematic 1. Connect the red
lead to the bottom end of the 100 ohm resistor in schematic 1. and
the black lead to “-“ end of the battery.

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7. Observe the reading on the VOM meter face. Record the reading.
8. Repeat steps 5, 6 and 7 for schematic 2.
9. Repeat procedure for schematic 3
F. MEASURING DC CURRENT WITH DIGITAL MULTIMETER
front panel jack labeled “Common”.
jack labeled “AMPS” or “mA”.
3. Calculate the value of current that will flow in the circuit depicted
in schematic 1. Place the function switch on a high enough scale to
measure calculated current.
4. Connect the circuit shown in schematic 1. Connect the read lead to
the bottom end of the 100 ohm resistor in schematic 1, and the
black lead to “-“ end of the battery.
5. Observe the reading on the DMM meter face.
6. Repeat steps 3, 4 and 5 for schematic 2.
G. VOLTAGE MEASUREMENTS WITH THE VOM
1. Insert the banana plug in of the black test into the meter’s from
panel jack labeled “Common”. On some meters, this jack maybe
labeled “-”.
2. Insert the banana plug in of the red test lead into the front panel
jack labeled “+”. On some meters this jack maybe labeled
“Volts/Ohms”.
exactly aligned with the 0 on the left side of the meter face.
with a small screw driver. Be certain to use care with this
adjustment, since this is rather an easily damaged part.
5. Place the function switch on a high enough scale to measure 1.5
volts. This varies from meter to meter, and will depend on the make
and model of your meter.
6. Connect the red lead to “+” and of the D battery and the black lead
to “-” and of the battery.
7. Observe the reading of the VOM meter face. Record the reading.
8. Repeat the procedure for the C cell and record the results in the
blanks indicated.
9. Place the function switch on a high enough scale to allow a reading
of at least 9 volts.
10. Repeat the procedure for the transistor radio battery, and record
the results in the blanks indicated.
H. VOLTAGE MEASUREMENTS WITH A DIGITAL MULTIMETER
1. Insert the black test lead of the digital multimeter into the
“common -” test jack.

25
3. Place the function switch on a high enough scale to measure 1.5
volts.
4. Connect the red lead to “+” end of the D battery and black lead “-”
end of the battery. Reversing the test leads will result in a “-”
reading on the meter.
5. Observe the reading on the DMM meter face.
6. Repeat steps 6 and 7 for the C cell.
7. Place the function switch on a scale that will allow reading of at
least 9 volts, if the presence scale will not handle 9 volts.
8. Measure the voltage across the terminals of the 9 volt battery.

26
PERFORMANCE TEST 2.1
PROCEDURE:
Given a ruler and protractor, measure the length, width, height
and distance of a hole from edge to center and the opening of angle as
indicated in the drawing below. Use both the English and Metric system.
Write your answers in another sheet of paper.
A. Reading Linear Measurements
B. Measuring the Resistance of Resistors
PROCEDURE: Given 5 assorted carbon resistors and a multi-tester,
measure the resistance of each resistor.
Steps:
1. Set the pointer of the tester to infinity using zero connector.
2. Turn the selector knob to the desired range in the ohmmeter
for easy and accurate reading.
3. Shorten the two test prods and adjust the pointer to zero
ohm using the zero ohm adjuster.
4. Connect one test prod to one terminal lead of the resistor.
5. Connect the other test prod to one terminal of the resistor.
Note: Connection in step 5 must be touched by bare hands.
The body resistance is always included in the measurement
especially in high resistance resistor.
6. Read the measurement in the ohmmeter scale and multiply it
with the equivalent of the minor division. After computing,
record the reading in a separate sheet of paper.
First Resistor
Second Resistor
Third Resistor
Fourth Resistor
Fifth Resistor

27
C. Measuring AC Voltage
PROCEDURE: Given an AC voltmeter and power transformer, with
multiple output, measure the AC voltage at the different test points using
the diagram below as a guide. Record the measurement in another sheet
of paper.
1. Set the pointer of the tester to infinity using the zero connector.
This is only done if the pointer of the tester is not at infinity.
2. Turn the selector knob to the desired range in the ACV for easy and
accurate reading. The desired range must be always higher than
the voltage to be measured to avoid damage in the tester. This
means that if the voltage to be measured is about 6 volts, the range
must be 10 V AC.
3. Connect the two test prods of the tester to the designated test
points. Do not hold the metal part of the test prods to avoid
electrocution or shock.
4. Read the measurement in the ACV scale and multiply it by the
equivalent of the minor division. Record the measurement on
another sheet of paper.
D. Measuring DC Voltage
PROCEDURE: Given a DC voltmeter and an AC-DC converter, measure
the DC voltage at the designated test points. Record the measurements
on another sheet of paper.
1. Check if the pointer is set at infinity. If not, set it to infinity first by
using the zero corrector.
2. Turn the selector knob to the desired range. Note: The desired
range must be always higher than the expected voltage.
3. Connect the negative test prod (black) to the negative (ground) of
the circuit and the positive test prod (red) to the designated test
points as labeled in the circuit.

28
4. Read the measurement in the DCV scale. Disconnect the test
prods. Multiply the reading in the minor division by the equivalent
of the minor division.
5. Record the measurements on another sheet of paper.
E. Measuring DC mA Current
PROCEDURE:
Given a DC mA (multi-tester) and a simple electronic circuit,
measure the DC mA at the designated test points using the attached
schematic diagram as a guide. Record the reading on another sheet of
paper.
1. Check if the pointer is set at infinity. If not, set it to infinity by
using zero corrector.
2. Turn the selector knob to the desired range in the DC mA.
3. To measure the collector current of the circuit, connect the
negative test prods to point A and the positive test prods to point B.
prods.
5. Multiply the reading by the equivalent of the minor division.
6. Record the measurement in the attached record sheet.
7. To measure the total current in the circuit, connect the negative
test prod to point C and the positive test prod to point D.
prods. Multiply the reading in the minor division by the equivalent
of the minor division.
9. Record the measurement on another sheet of paper.

30
OBSERVATION CHECKLIST FOR PERFORMANCE TEST 2.1
Student’s name:
Teacher’s name:
Name of School:
Competency standards
Unit of competency:
Instructions for the Teachers:
1. Observe the Student in performing mensuration and calculation.
2. Describe the assessment activity and the date when it was undertaken
3. Place a tick in the box to show that the student has completed each aspect
of the activity to the standard expected in the enterprise.
4. Complete the feedback sections of the form.
Date of observation
Description of assessment activity
Location of assessment activity
The student can… Tick
measure length, width, height of an ACDC converter case
measure the opening of angles
measure diameter of hole and the distance from center to the edge
observe proper use of linear measuring tools and instruments
select the appropriate range of the ohmmeter when measuring
resistance
make resistance measurements with analog/digital ohmmeter
read accurately the resistance values of the given resistors
observe the safety precaution when measuring resistance
select the appropriate range of the Ac voltmeter when measuring AC
voltage
make AC voltage measurements with analog/digital AC voltmeter
read accurately the AC voltage values
select the appropriate range of the DC voltmeter when measuring DC
voltage
make DC voltage measurements with analog/digital DC voltmeter
read accurately the DC voltage values
observe the concept of polarity with reference to DC voltage
measurement
select the appropriate range of a DC milliammeter when measuring
DC current
make DC current measurements with analog/digital DC
milliammeter
read accurately the DC current values in milliampere/microampere
observe the concept of polarity with reference to DC current
measurements
follow safety tips when measuring DC current
Did the student’s overall performance meet the standard? Yes No
Teacher’s Feedback:
Teacher’s signature: Date:

31
QUESTIONING CHECKLIST FOR PERFORMANCE TEST 2.1
Student’s name:
Teacher’s name:
Name of School
Competency
standards
Unit of competency:
Instructions for the Teachers:
1. Observe the Student (insert description of activity being observed)
2. Describe the assessment activity and the date on which it was
undertaken
3. Place a tick in the box to show that the Student completed each aspect
of the activity to the standard expected in the enterprise
4. Ask the Student a selection of the questions from the attached list to
confirm his/her underpinning knowledge
5. Place a tick in the box to show that the Student answered the
questions correctly.
6. Complete the feedback sections of the form
Date of observation
Description of assessment
activity
Location of assessment activity
Do you … Tick
 adjust the zero ohm control before measuring resistance?
 take safety precaution and measures when measuring
resistance?
 not touch the conductive part of the test probes when the
ohmmeter is set to RX1K or RX10K?
 adjust the zero corrector before measuring voltage and
current with an analog VOM?
 avoid physical contact to the conductive parts of the test
probes when measuring AC line voltage?
 take precaution when measuring voltage?
 find it possible to cut any of the lines in the circuit when
measuring current?
 take precautions and measures when measuring DC current?
 connect a DC milliammeter into the circuit?
Did the Student’s overall performance meet the standard? Yes No
Feedback to Student:
Teacher signature: Date:

32
Module PERFORM MENSURATION AND CALCULATION
Learning Outcome 3: Maintain measuring instruments.
Assessment Criteria:
1. Measuring instruments are handled properly.
2. Measuring instruments are cleaned before and after they are used.
3. Proper storage of instruments is undertaken according to
manufacturer’s specifications and standard operating procedures.

33
Learning Outcome 3: Maintain measuring instruments
1. Read Information Sheet 3.1
on proper handling,
cleaning and storing
measuring instruments.
2. Do Self-Check 3.1 to check
your knowledge on proper
handling, cleaning and
storing measuring
instruments.
3. Compare your answers to
the Answer Key.
answer all the questions
correctly, go over again the
Information Sheet.
questions, you can proceed
to the next module.
 You can ask the assistance of your
teacher to show you and explain
further the topic you don’t
understand.
without looking at the Information
Sheet.

34
PROPER HANDLING OF MEASURING INSTRUMENT
To ensure that the meter is used safely, follow all the safety and
operating instructions.
1. Never use meter on the electric circuit that exceeds 3k VA.
2. Pay extra attention when measuring the voltage of AC30 Vrms
(42.5V peak) or DC60V or more to avoid injury.
3. Never apply an input signals exceeding the maximum rating input
value.
4. Never use meter for measuring the line connected with equipment
(i.e. motors) that generates induced or surge voltage since it may
exceed the maximum allowable voltage.
5. Never use meter if the meter or test leads are damaged o broken.
6. Never use uncased meter
7. Be sure to use a fuse of the special rating or type. Never use a
substitute of the fuse or never make a short circuit of the fuse.
8. Always keep your fingers behind the finger guards on the probe
when making measurements.
9. Be sure to disconnect the test pins from the circuit when changing
the function or range.
10. Before starting the measurements, make sure that the function and
range are properly set in accordance with the measurement.
11. Never use meter with wet hands or in a damp environment.
12. Never use test leads other than the specified test leads.
13. Never open the tester case except when replacing batteries or fuses.
Do not attempt any alteration of original specifications.
14. To ensure safety and maintain accuracy, calibrate and check the
meter at least once a year.
15. It is a good idea to set the ammeter to the highest scale, until it can
be verified that the current is small enough to be safely read on a
lower scale; then reduce range to obtain reading.
16. Although the voltages you will be measuring have a very low voltage,
you are building habits to be used later with high voltage circuitry.
Do not allow your fingers to come in contact with the metal probes
on the meter.
17. Even though the output of the DC power supply is below 50 volts,
you are developing safety habits that you will use with higher, more
dangerous voltages. Exercise caution in taking voltage
measurements to prevent from electrecution.
18. Even though the voltage across the resistors is very low, observe all
safety precautions for higher voltage circuits. Remember that you
are developing habits with low voltage circuits that you will use with
higher voltage circuits.
19. Be absolutely certain before energizing the power supply, that the
ammeter is connected in series with the circuit to be tested.
Ammeters should never be connected in parallel with a component.
To do so will cause the component to be short circuited through the

35
ammeter, and may damage the meter or circuit, or the power supply.
If you have any doubt, ask your teacher.
20. The ohmmeter is never used in a circuit with power applied. To do so
can damage the meter.
21. Remember that the ohmmeter should never be used in a circuit that
has power applied to it. Always turn off the power supply and
disconnect the leads from the circuit before measuring the
resistance in the circuit.
22. Always discharge a capacitor before handling it or before
troubleshooting the circuit it is installed in.
23. A transformer is an inductive device. As with all such devices, high
transient voltages can be generated by the transformer when it is
turned off. This is sometimes referred to as “kick-back”. Meters
should be set to high ranges or removed before powering the down
the circuit.
24. Be cautious of transient (kick-back) voltages generated by this
circuit while turning off. Meters should never be removed or set to
high ranges while doing so.
25. Be cautious of transient (kick-back) voltages that may be generated
by the coil when empowering down the circuit. Meters should be set
to high ranges before turning off this circuit.
26. Capacitors are capable of storing voltages for long periods of time
after being removed from the source. Make sure capacitors are
discharged before handling.
REPLACING THE FUSE
If an overload above lighting voltage (about 100V) is applied to DCA, and
 ranges, the fuse is blown to protect the circuit.
1. Loosen the screws fixing the rear case and remove it.
2. Pull the fuse out of holder on the circuit board and replace it.
3. Put back the rear case where it was and tighten the screws.
4. Check and see whether or not indications of respective ranges are
normal (check other parts for any failures).
CLEANING PRECAUTIONS
1. The measuring instrument cover is treated with antistatic coating. Do
not wipe it hard or clean it with volatile solvent. Use a soft brush to
remove dust.
2. Clean the measuring instrument before and after using.
PROPER STORAGE
1. Avoid giving the tester any exercise shock or vibration by loading it on
the motorbike and the like.
2. Keep off dust and moisture from the tester.
3. Do not leave the tester for a long time in places of a high temperature
(higher than 55°C) a high humidity (higher than 80%), and dew
condensation.

36
SELF-CHECK 3.1
General Direction: Write your answer on another sheet of paper.
I. Directions: Write true if the statement is correct and false if the
statement is wrong.
1. Do not reverse the leads (polarity) on the analog meter because you
may bend the pointer and cause it to be inaccurate.
2. Be careful to observe polarity when measuring DC.
3. Be certain the function switch is properly set (i.e. DC, AC, volts,
amperes, milliamperes, resistance).
4. When measuring an unknown voltage, always start at the highest
range available on the meter. Lower the range until the meter reading
is approximately in the center of the scale.
5. Always connect voltmeters in parallel with the potential difference
being measured.
6. Multimeters should be stored in the highest DC range when not in use.
This is a safety precaution to protect the meter. If someone tries to
measure voltage while the range switch is set too low or on a
resistance range, the meter will be damaged.
7. Use the proper function, range and polarity to protect the meter.
8. Never connect an ammeter into a circuit when the power switch is on.
9. Always be certain that the ammeter is inserted in series.
10. Be certain that the range is high enough for the current being
measured. If the current to be measured is unknown, start at the
highest range and work down until the meter reads approximately in
the center of the range.
11. Observe proper polarity when measuring DC, especially when using
an analog meter.
12. Turn the power off when measuring resistance.
13. Reset the range switch to the highest voltage range when you have
finished making resistance measurements.
14. Never measure resistance with the power on.
15. The measuring instrument cover is treated with antistatic coating. Do
not wipe it hard or clean it with volatile solvent. Use a soft brush to
remove dust.
16. Clean the measuring instrument before and after using.
17. Avoid giving the tester any exercise shock or vibration by loading it on
the motorbike and the like.
18. Keep off dust and moisture from the tester.
19. Do not leave the tester for a long time in places of high temperature
(higher than 55°C) high humidity (higher than 80%), and dew
condensation.
20. Replace the same voltage and current ratings of fuse, when replacing
.burned-out or defective fuse of measuring instrument.

37
II. Direction: Select the item that will complete the statement or will
answer the question. Write your answers on another sheet of paper.
1. In order to measure current an ammeter must be connected :
a. across a switch c. across a source or a load.
b. directly into a circuit d. None of the above
2. To measure voltage a voltmeter must be connected:
a. across a source or load c. directly into a circuit
b. across a switch d. None of the above
3. Before installing an ammeter into a circuit it is necessary first to:
a. check to see if the ammeter can withstand the current.
b. de-energize the circuit
c. refer to the schematic to see where the ammeter is to be installed.
d. all of the above
4. Proper way of cleaning measuring instrument should be:
a. Once a month c. After using
b. Before using d. Before and after
5. The best way to clean measuring instrument is to:
a. Use a soft brush to remove dust
b. Use dampen cloth with plain water
c. Use dampen cloth with cleaning solvent
d. Use dampen cloth with volatile solvent or cleaning solution
6. The proper way of storing measuring instrument is to:
a. Keep off dust and moisture from the measuring instrument
b. Place the measuring instrument to an area near the strong
magnetic fields
c. Store the measuring instrument to an area susceptible to
corrosion and dirt
d. Place the measuring instrument to an area with extreme heat or
temperature
7. The best way to store measuring instrument is to:
a. avoid giving it any excessive shock or vibration by loading it on the
motorbike and the like.
b. place it in an area with strong magnetic fields.
c. store it in an area with corrosion and dirt
d. store it in an area with extreme heat or temperature.
8. Safety measure in storing measuring instrument:
a. Do not leave it for a long time in places of high temperature.
b. Place it in an area near the strong magnetic fields.
c. Store it in an area susceptible to corrosion and dirt.
d. Place it in an area with extreme heat or temperature.
9. When measuring unknown AC voltage, set the meter to:
a. rx10k c. 1000V DC
b. 1000V AC d. highest DC milliammeter range.
10. When measuring unknown DC voltage, set the meter to the highest:
a. ohmmeter range. c. DC range.
b. AC range. d. AC/DC milliammeter range .

38
ASSESSMENT PLAN
Note: The table below shows how you will be assessed in each
criteria.
Assessment Criteria
Assessment Methods
Observation
Questionnaire
Third
Party
Report
Demonstration
Work
Sample
Written
1. Object or component to be measured is
identified according to the procedure.
2. Correct specifications are obtained from
relevant source.
3. Measuring tools are selected in line with
the job requirements.
4. Appropriate measuring instrument is
selected to achieve required outcome
5. Accurate measurements are obtained
for the job requirements.
6. Calculation needed to complete work
tasks are performed using the four
basic processes of addition (+),
subtraction (-), multiplication (X), and
division (/) .
7. Calculations involving fractions,
percentages, and mixed numbers are
used to complete workplace tasks.
8. Numerical computation is checked and
corrected for accuracy .
9. Instruments are read to the limit of
accuracy of the tool.
10. Measuring instruments are handled
without damage
11. Measuring instruments are cleaned
before and after they are used.
12. Proper storage of instruments is
undertaken according to the
manufacturer’s specifications and to the
standard operating procedures.
Note: While you are working in your projects in other modules, you will
be assessed on how you perform mensuration and calculation.

39
ANSWER KEY
ANSWER KEY TO SELF-CHECK 1.1
I.
1. 1/8’’__
2. ¾’’___
3. 1’’___
4. 1 7/8’’_
5. 2 3/8’’_
6. 3’’____
7. 3 ½’’__
8. 4 3/8’’_
9. 4 7/8’’_
10. 5 5/8__
11. 2mm or 0.2cm
12. 5mm or 0.5cm
13. 18mm or 1.8cm
14. 31mm or 3.1cm
15. 45mm or 4.5cm
16. 79mm or 7.9cm
17. 83mm or 8.3cm
18. 99mm or 9.9cm
19. 126mm or 12.6cm
20. 149 mm or 14.9 cm
OHMMETER SCALE
1. 15 Ohms 6. 65 Ohms
2. 220 Ohms 7. No Answer
3. 10,000 Ohms 8. 1,200,000 Ohms
4. 10,000 Ohms 9. 240 Ohms
5. 46 Ohms 10. 2,500 Ohms
AC VOLTMETER SCALE
1. 7.2V 6. 14V
2. 24V 7. 240V
3. 330V 8. 360V
4. 580V 9. 1V
5. 2.6V 10. 165V
DC VOLTMETER SCALE
1. 0.082V 6. 230V
2. 0.105V 7. 720V
3. 1.6V 8. 0.8V
1. 9.8v 9. 5.6V
2. 12V 10. 8V
DC MILLIAMMETER SCALE
1. 41 mA 6. 2.3 mA
2. 1.05 mA 7. 18 mA
3. 16 mA 8. 0.08 A
4. 0.245 A 9. 14 mA
5. 12 mA 10. 4 mA
II.
Items Specification
Drop shock proof
Taut-band structure is adopted in the meter
section. The meter section is designed to
withstand shock.
Circuit protection
The circuit protected by fuse even when
voltage of a to AC 230V is impressed on each
range for 5 seconds.
Internal battery R6 (IEC) or UM-3 1.5V x2
Internal fuse 0.5A/250V 5.2 mm diaX20mm
Standard calibration
temp. and humidity range
23±2°C 45~75% RH
Operating temperature
and humidity range
0~40°C, 80% RH max., no condensation
Withstand voltage
3k V AC (1 min.) between input terminal and
case

40
Dimensions and weight 159.5X129X41.5mm/approx.320g
Accessories One copy of instruction manual, Hand strap
Measurement Range and
Accuracy
Function, full scale value and accuracy
ANSWER KEY TO SELF - CHECK 2.1
I.
1. 0.000047 11. O.914 meter
2. 0.00002785 12. 2.54 centimeter
3. 0.0015A 13. 0.394 in.
4. 0.002576A 14. 3.28 feet
5. 0.000079A 15. 0.305 meter
6. 1.861V
7. 1,710W
8. 1,632,000?
9. 4,750?
10. 1,000?
ANSWER KEY TO SELF-CHECK 3.1
I II
1. TRUE 1. A
2. TRUE 2. A
3. TRUE 3. B
4. TRUE 4. D
5. TRUE 5. A
6. TRUE 6. A
7. TRUE 7. A
8. TRUE 8. A
9. TRUE 9. B
10. TRUE 10. C
11. TRUE
12. TRUE
13. TRUE
14. TRUE
15. TRUE
16. TRUE
17. TRUE
18. TRUE
19. TRUE
20. TRUE

41
ACKNOWLEDGMENT
Copyright Department of Education 2008
First Published JUNE 2008
This module is based on the Competency-Based Curriculum-
Contextual Learning Matrix (CBC-CLM) and finalized on the Instructional
Modules Finalization Development Workshop conducted at the
Development Academy of the Philippines, Tagaytay City on May 6 -10,
2008
This learning instrument was developed by the following personnel:
Technology Teachers:
 Mr. Vic P. Diola – Group Leader
Bauan Technical High School
 Dr. Gilbert M. Castor
Don Alejandro Roses Sr. Science-Technology High School
 Mr. Eddielou L. Dayao
Sanchez Mira School of Arts and Trade
 Mr. Rufo G. Malla
E. Rodriguez Vocational High School
 Mr. Sherwin P. Medrano
San. Pedro Relocation Center National High School
 Mr. Remar C. Pinsoy
Baguio National School of Arts and Trade
Contextual Teacher:
 Mrs. Daisy Carousel P. Cervantes
Don Alejandro Roses Sr. Science-Technology High School
Facilitators:
 Dr. Edward dela Rosa
TEC-VOC Task Force
 Dr. Corazon L. Echano
TEC-VOC Task Force
Encoders:

42
 Mrs. Rosario D. Briones
 Mr. Mhariel L. Echano
 Mr. Jason O. Villena
Funding: Department of Education
ACKNOWLEDGMENT
Copyright Department of Education 2009
First Published JUNE 2008
This module is based on the Competency-Based Curriculum-
Contextual Learning Matrix (CBC-CLM) refined during the Writeshop on
the Refinement and Enrichment of Competency-Based Curriculum and
Contextual Learning Matrix of ARTS abd TRADES Specializations at
Marikina Hotel, Marikina City on April 20 – 25, 2009.
This learning instrument was refined and enriched by the following
educators:
Technology Teachers:
 Mr. Victorino P. Diola – Group Leader
TVE Coordinator, Bauan Technical High School
Bauan, Batangas
 Mr. Reynaldo C. Cunanan
Head Teacher VI, E. A. Rodriguez Vocational High School
Nagtahan, Sampaloc, Manila
 Mrs. Gigi C. Corpuz
Teacher III, Malvar National High School
Malvar, Batangas
 Mr. Ismael G. Gallardo
Teacher I, Community Vocational High School
Masipit, Calapan City, Oriental Mindoro
 Mr. Rufo G. Malla
Teacher II, E. A. Rodriguez Vocational High School
 Mr. George B. Fuazo
Teacher II, Gen. Mariano Alvarez Technical High School
GMA, Cavite

43
Contextual Teacher:
English
 Mrs. Teresita P. Tanael
Teacher III, Gen. Mariano Alvarez Technical High School
GMA, Cavite
o Mrs. Charlie I. Soriano
Teacher I, Don Alejandro Roces Sr. Science-Technology HS
Quezon City
Mathematics
o Mrs. Analiza Rosa P. Librada
Teacher I,-Mathematics Coordinator, San Pedro Relocation
Center Nat’l. HS
San Pedro, Laguna
Science
o Mrs. Gemma G. Vallarta
Teacher III Science Coordinator, San Pedro Relocation
Center Nat’l. HS
San Pedro, Laguna
o Mrs. Lenalyn Manzano
Teacher I, E A. Rodriguez Vocational High School
Facilitators:
 Dr. Corazon L. Echano
TEC-VOC Task Force
 Dr. Victorio N. Medrano
TEC-VOC Task Force
o Dr. Orlando E. Manuel
TEC-VOC Task Force
Encoders:
o Marisol E. Saldivar
Funding: Department of Education

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