1. When there are burrs on the surface of the workpiece, it is necessary to remove them before measurement, otherwise it will cause wear on the measuring tool and also affect the accuracy of the measurement results.
2. Do not use oilstones or sandcloths to rub the surface of the measuring tool, as well as the measuring surface and marking parts. Non metrological maintenance personnel are strictly prohibited from disassembling, modifying, or repairing the measuring tool without authorization.
3. It is not allowed to use the measuring claw tip of the caliper as a marking needle, compass or other tool, and it is not allowed to manually twist the two claws or use the measuring tool as a chuck.
4. Do not touch the measuring surface of the measuring tool with your hands, as damp dirt such as sweat can contaminate the measuring surface and cause it to rust. Do not mix measuring tools with other tools or metal substances to avoid damaging the measuring tools.
5. The storage location of measuring tools should be kept clean, dry, without vibration or corrosive gases, and should be far away from places with large temperature ranges or magnetic fields. The measuring tools stored in the measuring box should be clean and dry, and no other debris should be stored.
6. After using the measuring tool, clean the surface stains and aluminum shavings, loosen the fastening device, and apply rust proof oil to the measuring surface when not in use for a long time (more than a month). When measuring tools are not in use, they should be placed in a protective box and preferably used by a dedicated person. An annual audit record of the measuring tools being tested by authoritative units should be kept.
In addition, in the production of aluminum profile shells, lubricating oil should be used during the operation of aluminum profile saw blades, and any debris plugs should be cleaned in a timely manner. When not in use, clean the saw blade thoroughly, hang it vertically or lay it flat, and do not stack it. When the saw blade has difficulty cutting, it indicates that the saw blade needs to be polished.