Calculatiom and mensuration

1. PERFORMING MENSURATION
AND CALCULATION
EPAS 7
PREPARED BY:
ROEL P. TABUYO
TEACHER I
Bangui National High School

2. HOUSE RULES:
• 1. Turn off your microphones when discussion is ongoing.
• 2. If you wish to ask some questions, just hit the raise
hand icon to be recognized.
• 3. make sure you have with you your pen,
paper/notebooks and modules.
• 4. be alert always.
• 5. notify your teacher first before leaving your posts for
an emergency or basic necessities.

3. Objectives:
• At the end of the session, the students must be able
to:
– identify object or component to be measured;
– select measuring tools in line with the job
requirement;
– perform calculations to obtain accurate
measurements.

4. Tool Story

5. Who am I?

6. Thermometer
USE APPLICATION
it is used to measure temperature;
it comes with different appearances but
serves the same use.
-Body temperature
-Industries
-Factory
-Automotive production

7. What am I?

8. Graduated cylinder
USE APPLICATION
-It is used in measuring volumes of liquid -Cooking or baking
-Chemical mixtures
-Volume of ferric chloride to be used
-Exact mixtures of liquids

9. What am I?

10. Pull Push Meter
USE APPLICATION
-It is used to measure the length of an
object with a metallic measuring
instrument rolled within a closure. With
the length of 3 m –7.5 m.
-Length of wood
-House area-Construction purposes
-Road construction

11. What am I?

12. Ruler
USE APPLICATION
-It is used to measure smaller length
within a foot.
-Drawing small scale objects
-Measuring books
-Projects for school

13. What am I?

14. Try Square
USE APPLICATION
-It is used to measure right angles of
smaller objects.
-Tables-Chairs
-Furniture
-Construction of house posts

15. What am I?

16. Multitester
USE APPLICATION
-It is used to measure voltage, resistance
and milliammeter.
-Used to check electronic components
-Voltage checking
-Milliammeter check

17. What am I?

18. Ohmmeter
USE APPLICATION
-It is used to specifically measure
resistance.
-Resistance check
-Continuity check
-Checking electronic components

19. What am I?

20. Milliammeter
USE APPLICATION
-It is used to specifically measure
milliamperes.
-Battery amperage
-Power supply amperage
-Components amperage

21. What am I?

22. Volt meter
USE APPLICATION
-It is used to specifically measure voltage -Battery voltage
-AC source voltage
-Power supply voltage
-Voltage checking on devices

23. What am I?

24. Protractor
USE APPLICATION
-It is used to mark or measure the angle of
an object.
-Angles of tables
-Angles of speaker box to be made
-Projects requiring angles

25. Who are you going to call?
• Lapu –Lapu uses his huge blade to slain enemies.
After so many battles he is concerned with the
alignment of his blade. He wants to check whether
the blade and its handle is forming a 90-degree angle.
What measuring instrument should Lapu-Lapu use?

26. Who are you going to cll
• Alpha is a cyborg and he wants a measuring device
which can measure his resistance, amperes, and
voltage at the same time. What should he use?

27. Who are you going to call?
• Optimus Prime can transform into a truck and has so
many wires in his body. In order to perform better,
the wires must be checked for its resistance or
continuity. What measuring instrument should be
used?

28. Color matters! .
Direction.Read Identify the colors of the following without being distracted
by the words.Read the words as fast as you can.
BROWN BLACK YELLOW GREEN ORANGE
RED BLUE GREEN GRAY WHITE
GRAY ORANGE BLACK YELLOW VIOLET
RED GREEN ORANGE BLUE WHITE
VIOLET GREEN BLUE YELLOW RED

29. • Electronics uses various measuring instruments. The
mostly used measuring instrument is the Multitester
for it can check different values like voltage,
resistance and milliammeter.

30. • Multitester comes with two variants, the analog
multitester and the digital multitester.
Analog Digital

31. Analog multitester A tester that uses analog meter to read
the value of the component being tested.
Digital multitester A tester that uses digital display to reflect
the value of the component being tested.
Resistor A component that opposes the flow of
current.
Capacitor A component that stores energy.
Diode A component that allows current to flow in
only one direction.
Transistor A component used as switching and
amplifier.
Integrated Circuit(IC) A chip that have combination of
components inside and can do various
works.

32. RESISTORS CAPACITORS DIODE
TRANSISTORS INTEGRATED
CIRCUITS (IC’s)

33. Resistor color coding
• the process of getting the value of the resistor by the
color embedded to the carbon resistor.
• sometimes the resistor is somewhat higher or lower
with the color code value.
• resistor is still in good condition even if the value is
not the same value of the color code as long as the
value is within its tolerance.

34. Resistor Color Coding Table

35. PROCEDURE IN COLOR CODING THE VALUE OF
RESISTOR.
• Identify which of the color is the1st band of the
resistor. Take the resistor and see the color gold or
silver (tolerance). The tolerance must be at the right
side of the color set of the resistor when held. The
most left color of the resistor is the first band where
the start of reading takes place.
• *Take note you cannot see colors black, gold, silver
and no color in the first band.

37. • Using the color coding table write down the value
found in a resistor with the responding color. The first
band gives the first number, the second band gives
the second number, the third band gives the
multiplier or number of zeroes, the fourth band
represents the tolerance.

40. • Write down the 1st and 2nd number then multiply it
with the multiplier.
• Wherein the 1st and 2nd number is 61 then multiply
it by 100. So we can get 6100, just copy the answer
and put ohm symbol (Ω) after the product and copy
the tolerance. So the value of resistor is 6,100 Ω ±5%.

42. COMPUTING THE TOLERANCE OF THE RESISTOR
• The TOLERANCE is the range that determines the
good working value of a resistor. When a resistor is
not within the range of the computed tolerance value
of resistor is called OUT OF TOLERANCE.

43. Steps in getting the tolerance value of resistor.
• Get the value of the resistor.
• Get the tolerance value of the resistor. To get this
multiply the resistor's value with the tolerance (6100
x 0.05) = 305 so 305 Ω is the tolerance value. 5% is
equal to 0.05, 10% is equal to 0.1 and 20% is equal to
0.2.

44. • After getting the tolerance value. It is time to get the
maximum value of a resistor. Just add the resistor
value (6 100 Ω) and the tolerance value (305 Ω).
• 6100 Ω + 305 Ω = 6 405 Ω. So the maximum value of
the resistor is 6 405 Ω.

45. • After getting the maximum value, get the minimum
value of the resistor by subtracting resistor value ( 6
100 Ω ) and tolerance value ( 305 ).
• 6 100 Ω - 305 Ω = 5 795 Ω. So the minimum value of
the resistor is 5 795 Ω.

46. sample

47. STEPS IN MEASURING RESISTANCE USING AN
ANALOG OHMMETER
• You must know to interpret the value of the scale.
• Values of each line per range in the scale
• 0 – 5= 0.2
• 5 -10 = 0.5
• 10 – 20 = 1
• 20 – 50 = 2
• 50 – 100 = 5
• 100 – 200 = 20
• 200 – 500 = 100 (if the line is shorter than the other, the value is 50)

48. 0.2

49. • Set the proper range to be used in a certain resistor
value. The range that is used must be multiplied to
the interpreted value from scale.
For example: Interpreted value is 10
Range used is x 100
so the measured value is 1 000 (10 x 100)

51. • Adjust the pointer to the infinite resistance reading,
after that adjust the zero-ohm adjustment knob to
the zero resistance reading in order to get a precise
reading. This process is also known as calibrating the
meter.

53. • Connect the test probe to resistor’s terminal and
proceed to resistance measurements.

54. Color code the following and write it in your
activity sheets.
Color Combination Color
Code
Value
Maximum Value Minimum Value
1. BROWN – BLACK – RED - GOLD
2. BLUE – RED – GREEN – GOLD
3. WHITE – BROWN – BLACK – SILVER
4. BROWN – BLACK – BROWN –
GOLD
5. ORANGE – RED – RED – SILVER
Direction. Complete the table. Color code the resistor, give its minimum and maximum value. Write your answer in the activity sheet.

55. Read the following reading from the scale with
different range used presented in each number.
Write your answer in your activity sheet.