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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.
A General Electric NE-34 glow lamp, manufactured circa 1930. Neon was discovered in 1898 by William Ramsay and Morris Travers.The characteristic, brilliant red color that is emitted by gaseous neon when excited electrically was noted immediately; Travers later wrote, "the blaze of crimson light from the tube told its own story and was a sight to dwell upon and never forget."
BS 1881:204 Testing concrete. Recommendations on the use of electromagnetic covermeters; DGZfP:B2: Guideline “für Bewehrungsnachweis und Überdeckungsmessung bei Stahl- und Spannbeton” DIN 1045: Guideline Concrete, reinforced and prestressed concrete structures; ACI Concrete Practices Non Destructive testing 228.2R-2.51: Covermeters
Standard Test Method for Electrical Indication of Concrete's Ability to Resist Chloride Ion Penetration. ASTM Standard C1202-10. Standard Test Method for Surface Resistivity of Concrete's Ability to Resist Chloride Ion Penetration. Washington, D.C., USA: American Association of State Highway and Transportation Officials. 2011. AASHTO TP 95.
The standard IEC 61355-1 Classification and designation of documents for plants, systems and equipment [1] describes rules and guidelines for the uniform classification and identification of documents based on their characteristic content of information.
The test hammer hits the concrete at a defined energy. Its rebound is dependent on the hardness of the concrete and is measured by the test equipment. By reference to a conversion chart, the rebound value can be used to determine the concrete's compressive strength. When conducting the test, the hammer should be held at right angles to the ...
The test is carried out using a metal mould in the shape of a conical frustum known as a slump cone or Abrams cone, that is open at both ends and has attached handles.The tool typically has an internal diameter of 100 millimetres (3.9 in) at the top and of 200 millimetres (7.9 in) at the bottom with a height of 305 millimetres (12.0 in).The cone is placed on a hard non-absorbent surface.
Thermodynamic pump testing is a form of pump testing where only the temperature rise, power consumed, and differential pressure need to be measured to find the efficiency of a pump. These measurements are typically made with insertion temperature probes and pressure probes fitted to tapping points on the pump's inlet and outlet. [ 1 ]