Instrumentation pointer to the general technical requirements

In the national standard JBT - 9252 1999 'industrial automation instrument pointer indicates the basic part of type, size and pointer general technical requirements of file under regulation: 1. Pointer indicating part and the relative position of scale: pointer on the dial, its indication part should cover scale 1/4 ~ 3/4 of the shortest length scale line. 2. And the distance of the dial pointer indicates parts: is on the same plane with the dial pointer, pointer indicating end should be close to the edge of dial, as far as possible the distance or the technical documents shall have the corresponding standard. And dial is not in the same plane of pointer, the pointer indicating part should be close to the edge of dial, as far as possible the distance or the technical documents shall have the corresponding standard. 3. Pointer indicator or line width: shortest shall not exceed scale scale line width. 4. The color of the pointer, pointer (positive You can see part of the) Color: a) White dial, the pointer is black, red, green or blue; b） Black dial, the pointer is white or yellow. Pointer is not allowed to reflective, hampering readings. 5. Affect the appearance and shape of the needle should not have defects, such as plating tumor, sandwich, convex scar, burr, fissure or asymmetry of stiffener location and so on. 6. In order to improve the strength of pointer, pointer cross section can be made into various shapes. 7. Pointer to the structure, size, weight, balance, diamagnetism, fixed way and other influential to instrument measuring the performance of technical characteristics should be regulated by the relevant standards or technical documents. 8. More instrument of environmental conditions, when using a pointer by appropriate protective layer, or use appropriate materials. 9. Instrument for the performance test, under the influence of external factors, the pointer should not be interfering instrument work and reading the defects of the deformation and the influence of the instrument is beautiful.