Basic Electricity - Senior Secondary 1 - Functional parts of measuring instruments

TERM: 2^ND TERM

WEEK FOUR

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 5 periods each

Date:

Subject: BASIC ELECTRICITY

Topic: FUNCTIONAL PARTS OF MEASURING INSTRUMENTS

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

I.) Identify the basic components of measuring instruments

II.) State the functions of the components

III.) Discuss the importance of measuring instruments

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

NOTE

FUNCTIONAL PARTS OF MEASURING INSTRUMENTS

Components of measuring instruments

The basic components of measuring instruments typically include:

1. Sensing Element: This is the part of the instrument that interacts directly with the quantity being measured, such as voltage, current, temperature, or pressure. It converts the physical quantity into a measurable signal.
2. Transducer: The transducer converts the output from the sensing element into a form that can be easily measured or displayed. It may amplify, modulate, or convert the signal into electrical or mechanical form.
3. Display: The display component presents the measurement result in a human-readable format, such as analog indicators, digital readouts, or graphical displays.
4. Signal Processing Circuitry: This circuitry processes the raw signal from the transducer to improve accuracy, filter out noise, and perform any necessary calculations or conversions.
5. Power Supply: Many measuring instruments require a power supply to operate the various components, such as sensors, transducers, and signal processing circuits.

Functions of basic components of measuring instruments

1. Sensing Element: Detects and measures the physical quantity being analyzed, such as voltage, current, or temperature.
2. Transducer: Converts the output from the sensing element into a form suitable for further processing or display, such as electrical signals for analog meters or digital data for digital displays.
3. Display: Presents the measurement result in a format that is easy for the user to interpret, allowing for quick and accurate readings.
4. Signal Processing Circuitry: Processes the raw measurement signal to improve accuracy, remove noise, and perform any necessary conversions or calculations before displaying the final result.
5. Power Supply: Provides the necessary electrical power to operate the various components of the measuring instrument, ensuring proper functionality.

Importance of measuring instruments

1. Measuring instruments ensure that products meet specified standards and quality requirements, helping maintain consistency and reliability in manufacturing processes.
2. In fields such as aerospace, automotive, and nanotechnology, precise measurements are crucial for designing and manufacturing components with tight tolerances.
3. Measuring instruments enable scientists to gather accurate data, conduct experiments, and validate hypotheses across various disciplines, from physics and chemistry to biology and environmental science.
4. Instruments like thermometers, pressure gauges, and radiation detectors are essential for monitoring environmental conditions, ensuring workplace safety, and safeguarding public health.
5. By providing real-time data on parameters like temperature, pressure, flow rate, and composition, measuring instruments help optimize industrial processes, increase efficiency, and reduce waste.

EVALUATION: 1. Identify any 4 measuring instruments that you know

2. State the functions of the measuring instruments mentioned in 1 above
3. State 4 importance of measuring instruments.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively