1、 Purpose:
This instrument measures the micro roughness of the machined surface of parts using the light cutting method. Suitable for measuring surface smoothness of 1.0 to 80 microns, which is the original standard ▽ 3- ▽ 9 level. The depth of surface scratches, engraved lines, or certain defects can also be measured.
The characteristic of the light cutting method is that it is carried out without damaging the surface. It is an indirect measurement method. The unevenness of the texture can only be determined after calculation.
2、 The completeness of the instrument:
1. One instrument body
2. One micrometer eyepiece
3. Coordinate workbench 1 piece
4. One V-shaped block
5. Standard ruler (box) 1 piece
6.7x objective lens 1 set
7.14x objective lens 1 set
8.30 times objective lens 1 set
1 set of 9.60x objective lens
10. Adjustable transformer 220/4-6/5VA 1 piece
11. Photography device (optional) 1 piece
12. 3 2.1W 6V light bulbs (spare parts)
13. One set of brand digital camera and its dedicated adapter lens (brand computer and printer are also optional)
3、 Specifications

Measurement range unevenness average height value (Microns)	Surface smoothness level	Required objective lens	total magnification	Objective lens assembly work distance (millimeters)	Field of view (millimeters)
＞1.0～1.6 ＞1.6～6.3 ＞6.3～20 ＞20～80	9 8~7 6~5 4~3	60timesN. A.0.55 30timesN. A.0.40 14timesN. A.0.20 7timesN. A.0.12	510times 260 times 120 times 60 times	0.04 0.2 2.5 9.5	0.3 0.6 1.3 2.5

Measurement roughness range (1.0-80) micrometers
Uneven width with micrometer eyepiece measuring 0.7 microns to 2.5 millimeters
Using a coordinate workbench (0.01-13) millimeters
The weight of the instrument is about 23 kilograms
The external dimensions are approximately 180 × 290 × 470 millimeters