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How to use steel tape measure
                                                         How to use steel tape measure
 
Steel tape measure length is a more accurate and easy operation of commonly used methods, but during the actual volume side, especially during the more accurate measurements, it tends to form a misunderstanding, can cause measurement errors due to misunderstanding, even quality accidents. In some length to a more precise measurement it is, often requires ruler pull tight, without deflection, and that ruler pull more closely, the measured error is smaller, increasing the length of the error with the pull-foot force children think decreases. This is a big misunderstanding, they ruler of error due to the just ruler weight deflection produced. In fact deflection steel tape tension at a reasonable length measured error is very small, negligible.
 
Of course, in order to reflect the scale of the free length, measured intraday necessary biasing or grind to straighten the foot so when steel tape measure the length of the error from the device itself exactly where it comes from consideration, the error mainly from the external force of steel elastic deformation of the tape produced that steel tape under loads elongation, elongation after steel tape measure so that the actual distance is reduced or distance readings fixed for a longer length than the actual, but also in the elastic range of internal and external forces large, the greater the stretch drive, the greater the resulting error. So strict specification establishes the correct tension and correction value at span, temperature, ruler of the situation with constant cross-section, the only way to measure length is ideal, and those who attempt to increase the tension of the ways to eliminate errors The measure coincided with the desire to the contrary, the greater the tension, the greater the error.
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