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2. Test light - Wikipedia

   en.wikipedia.org/wiki/Test_light

   A test light, test lamp, voltage tester, or mains tester is a piece of electronic test equipment used to determine the presence of electricity in a piece of equipment under test. A test light is simpler and less costly than a measuring instrument such as a multimeter , and often suffices for checking for the presence of voltage on a conductor.

3. Multimeter - Wikipedia

   en.wikipedia.org/wiki/Multimeter

   A multimeter (also known as a multi-tester, volt-ohm-milliammeter, volt-ohmmeter or VOM, avometer or ampere-volt-ohmmeter) [1] is a measuring instrument that can measure multiple electrical properties. [2] [3] A typical multimeter can measure voltage, resistance, and current, [4] in which case can be used as a voltmeter, ohmmeter, and ammeter.

4. Electronic test equipment - Wikipedia

   en.wikipedia.org/wiki/Electronic_test_equipment

   The following items are used for basic measurement of voltages, currents, and components in the circuit under test. Voltmeter (Measures voltage) Ohmmeter (Measures resistance) Ammeter, e.g. Galvanometer or Milliammeter (Measures current) Multimeter e.g., VOM (Volt-Ohm-Milliammeter) or DMM (Digital Multimeter) (Measures all of the above)

5. Four-terminal sensing - Wikipedia

   en.wikipedia.org/wiki/Four-terminal_sensing

   Four-point measurement of resistance between voltage sense connections 2 and 3. Current is supplied via force connections 1 and 4. In electrical engineering, four-terminal sensing (4T sensing), 4-wire sensing, or 4-point probes method is an electrical impedance measuring technique that uses separate pairs of current-carrying and voltage-sensing electrodes to make more accurate measurements ...

6. Avometer - Wikipedia

   en.wikipedia.org/wiki/Avometer

   A power factor and wattage unit was also available). 500 ohms/volt with divide by two button in normal position, 1000 ohms per volt with divide by two button pressed. [ 20 ] AVOmeter model 8: May 1951 to November 2008 (7 'Marks') (Basic ranges to 10 A and 1000, 2500 or 3000 V depending on Mk.). 20,000 ohms/volt DC, 1000 ohms/volt AC.

7. Test probe - Wikipedia

   en.wikipedia.org/wiki/Test_probe

   A typical probe uses a 9 megohm series resistor shunted by a low-value capacitor to make an RC compensated divider with the cable capacitance and scope input. The RC time constants are adjusted to match. For example, the 9 megohm series resistor is shunted by a 12.2 pF capacitor for a time constant of 110 microseconds.