Table of Content
 

Single range analog meters and it, s calibration Standard of measurement
  • Working standards
  • IEEE standards :
  • Accuracy, tolerance & precision
  • Accuracy
  • Tolerance
  • Precision
  • Errors & classification
  • Gross errors
  • Systematic errors
  • Random errors
  • Calibration of instruments
  • General considerations in calibrating instruments
  • General examination
  • Examination for friction
  • Examination for balance
  • Precautions in calibration
  • Effect of stray fields
  • Calibration of voltmeters and ammeters by comparison method

DC Voltage and Current Measuring Instrument Movements

  • The D’Arsonval Movement
  • Principal of operation of a PMMC type meter movement
  • Damping in coil type meters
  • Magnetic shielding in PMMC

Moving Iron type Voltage and current Measuring Instrument Movements

  • Moving iron type meters
  • Principal of operation of attraction type meter
  • Principal of operation of repulsion type meter
  • Practical moving iron instruments of repulsion type
  • Damping in moving iron meters

Extending the range and Conversions of MC Type Meters

  • INTRODUCTION
  • Internal and external shunts
  • Calculating the shunt resistance
  • DC Voltmeters
  • Instruments sensitivity
  • Loading effect
  • Meter accuracy
  • Multirange Meters
  • Multirange Ammeter
  • Multirange voltmeter
  • Ohmmeters
  • Series ohmmeters
  • Shunt ohmmeters
  • Multirange series ohmmeters

General defects in Analog multimeters and its maintenance

  • Explain the similarity &dissimilarity between single range and multimeters
  • Categorize the defects likely to occur in multimeters
  • List possible defects in each category.

Identification of digital multimeter

  • Precautions to be taken in handling a digital multimeter
  • Accessories pm2518 %& pm2618&pm2718
  • Safety characteristics pm2518&pm2618&pm2718

Characteristics of digital multimeter

  • Environmental characteristics pm2518 & pm2618 &2718
  • Introduction
  • Pm2518;
  • Pm2618;
  • Pm2718;
  • Explanation of the blockdiagram
  • Analog part
  • The converter can be enabled with signal ENAC.
  • ADC(analog to digital convertor)
  • Digital part
  • Outputs; lx display
  • Principle of operation

Function generator

  • Introduction
  • Principle of working function generator
  • Application of function generator
  • Icl8038 basics
  • Sine wave distortion
  • Panel controls and features of a typical function generator are as follows
  • Description
  • Conditions for operation
  • Power
  • Supplies
  • Fm and sweeping
  • Usual trouble and dealing methods

Identification of front panel control and blocks of a typical singal generator

  • Familiarization with front panel controls
  • Requirements of singal generator
  • Standard singal generator
  • Conventional standard singal generator melaoe11
  • Basic standard singal generator
  • Standard specifications of a signal generator
  • AF sine and square wave generator

CRO control and synchronisation

  • Introduction
  • Prosessing of a singal in CRO
  • Initializing the scope
  • Compensating the probe
  • Checking the controls
  • Check vertical systems controls
  • Check the horizontal system control
  • Check the trigger systems control
  • Check the correct probe tips and adapters
  • Oscilloscope probes
  • Types of probes
  • Voltage (attenuator)probes
  • High voltage probes
  • Low impedance probes
  • Current probes
  • Probe assessories
  • Performance checks
  • Channel 1 channel 2
  • Dual alt mode, alternate /chop mode
  • Checking of rise time
  • Checking of cal output frequency
  • Checking of component tester voltage and current
  • Checking off line triggering
  • Checking of external trigger
  • Y output
  • Checking of z modulation
  • Safety precaution
  • Triggering CRO

CRO fundament6al blocks

  • Display system
  • Cathode ray tube
  • The horizontal system
  • The triggering system
  • Z axis amplifier
  • Power supply system

Trouble shooting CRO with the complaint “dead set”

  • Good trouble shooting procedures
  • Troubleshooting techniques and procedures
  • Symptom recognition
  • Symptom elaboration
  • Isolate the faulty section /assembly
  • Isolate the faulty block
  • Isolate the faulty component
  • Repair the instrument and verify proper operations
  • Some precautions
  • Problem tree pt _01

Trouble shooting CRO with the complaint no trace on screen

  • Problem three pt_02

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