The detection method of steel tape measure involves multiple aspects to ensure its accuracy and durability. According to industry standards and metrological verification specifications, the detection process usually includes the following steps:

1. Appearance inspection: Check the body, shell, hook and other components of the steel tape measure to ensure that there are no obvious defects or damage.

The scale should be clear and uniform, with clear and visible markings, no creases or defects on the ruler body, and a clean surface without oil stains or spots.

2. Measurement accuracy testing: Compare the measured steel tape with a standard to observe whether the measurement error is within the allowable range. The specific requirements are as follows:

For a steel tape measure with a range of 2m, the allowable error for the entire length shall not exceed ± 1mm, and the error from any middle scale to the endpoint shall not exceed ± 0.7mm. For a steel tape measure with a range of 3m, the allowable error for the entire length shall not exceed ± 1.2mm, and the error from any middle scale to the endpoint shall not exceed ± 0.9mm.

For a steel tape measure with a range of 5m, the allowable error for the entire length shall not exceed ± 1.5mm, and the error from any middle scale to the endpoint shall not exceed±1.3mm。3Inspection cycle:

Steel tape measures need to be inspected regularly, usually once a year, and can be adjusted according to frequency of use and location. Through the detailed testing methods mentioned above, it can be ensured that the steel tape measure meets high-quality standards, providing customers with accurate, durable, and reliable measuring tools.