- Basic Devices - Have the ability to check correct connections of volt, ampere, watt and watt-hour meters and meter switches. Check current and voltage circuits and connections.
- Meter Basics Both analog and digital metering methods can measure many useful electrical quantities.
- Voltmeters and Ammeters: AC Metering Circuits AC electromechanical meter movements come in two basic arrangements: those based on DC movement designs, and those engineered specifically for AC use.
- Wattmeter Design: DC Metering Circuits Power in an electric circuit is the product (multiplication) of voltage and current, so any meter designed to measure power must account for both of these variables.
- Power Measurement: AC Metering Circuits Power measurement in AC circuits can be quite a bit more complex than with DC circuits for the simple reason that phase shift complicates the matter beyond multiplying voltage by current figures obtained with meters.
- Errors in Measurement Measuring instruments are not exact! Accuracy depends on the instrument you are measuring with.
- Percentages and Errors "Error" in measurement doesn't usually mean "mistake." It means the difference between the value found by measurement and the "true value" of the quantity.
External links are provided by our community of test technicians. Please submit any resources that you feel may be helpful to this topic.
Recommended: Study tips for the NETA exam
Share this page