Physical quantities and measurement units. Electrical measuriement instruments. Electromechanical measuring instruments. Instruments with moving coil. Extending the measuring range of the instrument with the moving coil. Extending the measurement range of measuring instruments. Electronic measuring instruments. Electrical measurement of non-electrical quantities. Measurement systems. Measuring accesories. Counter-timer. Counting. Measuring time intervals. Measuring frequency and period. Frequency ratio measurements. Phase difference measurement. Digital-to-analog converters. Function generators. Analog-to-digital converters. Digital multimeters. Oscilloscopes. Time bases. Multi-channel oscilloscopes. Digital oscilloscopes. Scope probes. Measurement signal parameters using oscilloscope. Measuring bridges. DC measuring bridges. Wheatstone bridge. Kelvin bridge. Unbalanced Wheatstone bridge. AC measuring bridge. Measuring bridges with multiple sources. Measuring compensators. DC measuring compensators. Measurement of electrical current, voltage, resistance, impedance, power, capacitance and inductance. General characteristics of the measuring instruments. The static characteristics. Sensitivity. Linearity. Resolution. Measuring range / span. Scale / pointer hand / display. Input / output impedance. Accuracy. Stability. Normal / border / reference conditions. Instrument marking. Dynamic characteristics. Processing of the measurement results. Measurement error. Blunders. Systematic errors. Random error. Measurement uncertainty. Standard measurement uncertainty. Combined uncertainty. The expanded measurement uncertainty. Measurement information. Quality of measurement information.