Measuring instrument
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United States of America Patent
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Nov 28, 2017
Issued Date -
N/A
app pub date -
Mar 18, 2015
filing date -
Mar 21, 2014
priority date (Note) -
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Abstract
A measuring instrument and a method checks the functional capability of an electric heating wire of a surface heating system before it is installed and indicates damage to the heating wire while it is being installed. The instrument includes a power supply, connecting devices electrically connected to the power supply and to which the free ends of an electric heating wire can be connected such as to form a current circuit on the power supply, a resistance measuring device designed to record the electric resistance of a heating wire connected to the power supply, a display device which displays an electric resistance of a heating wire recorded by the resistance measuring device, and a warning device designed to emit an acoustic signal when the electric resistance of a heating wire recorded by the resistance measuring device strays from a target value range defined by the measuring instrument.
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