polarity tester
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Test and tagging — is a generic name given to the process of visually inspecting and electrically testing in service electrical equipment for personal use and/or safety. Colloquially, it is also referred to as; tagging, test tag, test and tag, electrical tagging,… … Wikipedia
Portable appliance testing — For other uses, see PAT (disambiguation). A common label for certifying that a device has been tested. Portable appliance testing (commonly known as PAT or PAT Inspection or PAT Testing) is a process in the United Kingdom, New Zealand and… … Wikipedia
Oscilloscope — This article is about current oscilloscopes, providing general information. For history of oscilloscopes, see Oscilloscope history. For detailed information about various types of oscilloscopes, see Oscilloscope types. Illustration showing the… … Wikipedia
Multimeter — A digital multimeter A multimeter or a multitester, also known as a VOM (Volt Ohm meter), is an electronic measuring instrument that combines several measurement functions in one unit. A typical multimeter may include features such as the ability … Wikipedia
Solenoid voltmeter — A solenoid voltmeter is a specific type of voltmeter used by electricians in the testing of electrical power circuits. Wiggy is the registered trademark for a common solenoid voltmeter used in North America and manufactured by Square D, derived… … Wikipedia
In-circuit test — (ICT) is an example of white box testing where an electrical probe tests a populated printed circuit board (PCB), checking for shorts, opens, resistance, capacitance, and other basic quantities which will show whether the assembly was correctly… … Wikipedia
Number Five Crossbar Switching System — The Number Five Crossbar Switching System or 5XB switch, designed by Bell Labs and made by Western Electric, was in use in Bell System telephone exchanges from 1948 to the 1980s. Its principal use was as a Class 5 telephone switch, though… … Wikipedia
Residual-current device — A two pole residual current device A Residual Current Device is a generic term covering both RCCBs and RCBOs. A Residual Current Circuit Breaker (RCCB) is an electrical wiring device that disconnects a circuit whenever it detects that the… … Wikipedia
List of genetics-related topics — This is a list of terms related to genetics. NOTOC # * 3 end * 5 end A * Acentric chromosome * Achondroplasia * Active site * Adam s Curse * Adaptation * Adenine * Adenosine * Adenovirus * Adenosine diphosphate (ADP) * Ala * Alagille syndrome *… … Wikipedia
List of genetic engineering topics — NOTOC # 3 end 5 end A Acentric chromosome Achondroplasia Active site Adam s Curse Adaptation Adenine Adenosine Adenosine diphosphate Adenovirus ADP Ala Alagille syndrome Albino Alcoholism Alkylating agent Allele Allele frequency Alleles… … Wikipedia
Voltmeter — Demonstration voltmeter from a physics class A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. Analog voltmeters move a pointer across a scale in proportion to the voltage… … Wikipedia