Scale value with fine close laser score, small volume, convenient to carry, is mainly used in large print for ordinary steel tape work of dissemination of the standard. "Quality has been well received by the majority of users, and has tailor measure tape been used by various inspection unit. Widely used in measurement, Bridges, large YouQiGuan, large-scale machinery installation, standard swimming pool, the diving platform construction of measurements. Large printing tape classified by the length of the standard steel: there were 3 m, 5 m, 10 m, 15 m, 20 m, 30 m and 50 m, as two-thirds SYGT - steel large printing tape test standard measuring instruments.
Steel large printing tape is used to measure the object length measuring tool. Its main characteristic is large measuring range. In actual measurement, tested on site and check the length limit, can't complete measurement, 1 have to segmentation method is used to measure, so will produce segmentation error, fractionation method usually use standard ruler of the same size and gauge for this point is the constant value of error of the same size, so should be a strong positive correlation. In order to avoid the strong positive correlation and the segmentation results of too many and the calibration uncertainty, resulting in the verification methods can not meet the requirement of the verification, new revision of verification regulation has increased the length of the "verification shall not be less than 5 m" requirements.
The main steel large printing tape verification standard as follows: standard steel large printing tape, standard steel large printing tape line class is commonly used in measurement standard, the need to establish. Steel large printing tape verification regulation was established since 1958, the domestic general measure technology institution can easily implement measure. Has universality, reliability and simplicity. Means OD（outside diameter）tape measure can directly or indirectly with measuring instruments to measure the value object of the devices, instruments and meters, measuring tool and material used for unified value standard. Measuring instruments are widely used in production. The scientific research. Areas and people's life and so on various aspects, in the whole measurement legislation in a quite important position. Because the national unity of the value, first of all reflected in the accuracy of the measuring instruments is consistent, not only is the main object, supervision and management of measuring instruments and measuring departments provide metrological assurance technology base.
