However, the ease of use often tempts people who are not familiar with this type of measuring device to be sent to the construction site in the hope that it will work out. But this usually goes wrong. The measurement often fails when the correct standard is set. As easy as the devices are to operate, one should nevertheless have a certain background knowledge of the performance classes and expressions to be set, such as "NVP value", "Permanent Link" or "Channel Link", and the common names of the test parameters should also be known.
The manufacturers of the measuring devices as well as independent training houses constantly offer training courses that convey this knowledge. A know er will also be able to select the appropriate measuring device to properly certify its wiring. Here, too, there are some rules that are important to get a reliable statement.
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