Electrical Instrumentation II

Electronics Engineering · Level 6  ·  7 Chapters

Compiled by: Joan Jerotich

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What Electrical Instrumentation II covers

In this unit, you will be able to confidently work with electrical instruments by identifying symbols, measuring current and resistance accurately, and handling components safely with proper cleaning and soldering techniques. You will master configuring and testing instruments according to manufacturer guidelines, converting units precisely, and applying problem-solving skills to tackle real-world electrical challenges. By the end, you’ll be equipped to use a variety of meters and tools effectively, ensuring your work meets professional standards and keeps you safe on the job.

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Careers after Electrical Instrumentation II

Electrical instrumentation skills open doors to many hands-on jobs across Kenya’s growing industrial and service sectors. Whether you join a team or start your own workshop, the ability to read schematics, measure safely, and troubleshoot equipment makes you an essential problem-solver on the ground.

  • Maintenance workshops in agro-processing factories (e.g., in Nakuru or Eldoret) - you read electrical symbols on control panels, use digital multimeters and clamp ammeters to verify motor currents, and perform high-resistance checks on heating elements, keeping production lines running and earning a steady wage as an instrumentation technician.
  • Field service teams for rural electrification projects (county-wide) - you measure voltage, current and resistance on distribution lines, configure portable testing instruments, and convert units on the fly to ensure safe commissioning of new substations, receiving project-based pay or a salaried position with a utility contractor.
  • Automotive repair and diagnostics shops in Nairobi’s industrial areas - you apply analogue and digital meters to test starter motors, alternators and sensor circuits, solder loose connections, and follow manufacturer manuals to certify repairs, earning income per vehicle serviced or as a hired technician.
  • Telecommunications infrastructure firms installing base stations along the North-East corridor - you use clamp ammeters to verify power feeds, perform unit conversions for cable specifications, and troubleshoot power-over-Ethernet modules, gaining employment as a field instrumentation engineer or offering freelance audit services.
  • Solar PV farms and mini-grid sites in Turkana and Kitui - you configure inverters and charge controllers, measure high resistance in solar panel strings, and calibrate meters to ensure optimal energy output, earning either a contract salary or revenue from maintenance contracts you manage yourself.
  • County referral hospitals and private clinics in Kisumu and Mombasa - you service biomedical equipment such as ventilators and patient monitors, using precise resistance and current measurements and following manufacturer testing procedures, providing a reliable income as a biomedical instrumentation specialist.
  • HVAC and refrigeration service companies serving hotels and resorts on the Coast - you classify and operate analogue and digital meters to check compressor currents, perform calculations for load balancing, and tighten electrical connections, earning wages as a service technician or setting up your own HVAC instrumentation business.
  • Electronics repair kiosks in urban markets (e.g., Gikomba, Westlands) - you identify component symbols, solder circuit boards, and test repaired gadgets with multimeters, turning each successful fix into cash sales and building a reputation for fast, accurate service.
  • Calibration labs that serve manufacturers in Kiambu and Machakos - you follow standard operating procedures to calibrate meters, perform unit conversions, and document results, securing a salaried role as a calibration technologist or contracting out calibration services to multiple clients.
  • Renewable-energy start-ups developing wind-turbine monitoring systems in Embu - you apply problem-solving processes to interpret sensor data, classify meters for vibration analysis, and perform accurate calculations for system diagnostics, earning project-based fees or equity stakes as a technical co-founder.

Mastering these instrumentation skills means you can move confidently between factories, farms, hospitals, and your own workshop - turning precise measurements into reliable earnings and a career that powers Kenya’s future. Keep experimenting, stay safe, and let every reading you take be a step toward the next opportunity.

Chapters

What Electrical Instrumentation II covers: 64 main topics in 7 chapters

1. Apply analogue instruments

  1. 1.1 Meaning of Terms
  2. 1.2 Analogue Instruments
  3. 1.3 Voltmeter
  4. 1.4 Ohmmeter
  5. 1.5 Ammeter
  6. 1.6 Analogue Electronic Multimeter
  7. 1.7 Multimeter Probes
  8. 1.8 Calculation of Errors
  9. 1.9 Statistical Methods of Analyzing Errors

2. Apply electromechanical instruments

  1. 2.1 Meaning of Terms
  2. 2.2 Permanent Magnet Moving Coil and Moving Iron Instruments
  3. 2.3 Deflection Instrument Fundamentals
  4. 2.4 Galvanometer
  5. 2.5 DC and AC Ammeters and Voltmeters
  6. 2.6 Classifications
  7. 2.7 Wattmeter
  8. 2.8 Energy Meters

3. Apply digital instruments

  1. 3.1 Meaning of Terms
  2. 3.2 Logic Gates Circuits
  3. 3.3 Flip-Flop Circuits
  4. 3.4 Digital Displays
  5. 3.5 Digital Counting
  6. 3.6 Digital Frequency Division
  7. 3.7 Seven-Segment Display
  8. 3.8 Digital Voltmeter
  9. 3.9 Digital Multimeter
  10. 3.10 Digital Cathode Ray Oscilloscope
  11. 3.11 Analogue-to-Digital Converters
  12. 3.12 Digital-to-Analogue Converters
  13. 3.13 Calculations Involving Accuracy and Resolution in Digital Instruments

4. Measure electrical and physical quantities

  1. 4.1 Meaning of Terms
  2. 4.2 Methods Resistance Measurements
  3. 4.3 Low Resistance Measurement
  4. 4.4 High Resistance Measurements
  5. 4.5 Measurement of Inductance and Capacitance
  6. 4.6 AC Bridge Theory
  7. 4.7 Measurement of Physical Quantities

5. Apply waveform analysing instruments

  1. 5.1 Meaning of Terms
  2. 5.2 Cathode Ray Tube
  3. 5.3 Parts of a Cathode Ray Tube
  4. 5.4 Cathode Ray Oscilloscope
  5. 5.5 Operation of a CRO
  6. 5.6 Classifications of CROs
  7. 5.7 Oscilloscope Controls
  8. 5.8 Application of CROs
  9. 5.9 Logic Analyzers
  10. 5.10 Spectrum Analyzers

6. Apply sensors and transducers

  1. 6.1 Meaning of Terms
  2. 6.2 Sensors
  3. 6.3 Transducers
  4. 6.4 Types of Sensors and Transducers
  5. 6.5 Classification of Transducers
  6. 6.6 Signal Processing
  7. 6.7 Data Presentation Displays

7. Calibrate instruments

  1. 7.1 Meaning of Calibration
  2. 7.2 Comparison Methods
  3. 7.3 DC Voltmeter Calibration
  4. 7.4 DC Ammeter Calibration
  5. 7.5 Ohmmeter Calibration
  6. 7.6 Wattmeter Calibration
  7. 7.7 Digital Multimeters as Standard Instruments
  8. 7.8 Calibration Instruments
  9. 7.9 Potentiometers
  10. 7.10 Potentiometer Calibration Methods

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