JJF 1132-2005Calibration Specification for Combined Type Angle Rules (English PDF)

1 Scope (1)

2 References (1)

3 Overview (1)

4 Measurement Characteristics (1)

5 Calibration conditions (2)

6 Calibration Items and Calibration Methods (2)

6.1 The flatness or straightness of each measuring surface (2)

7 Calibration Results Expression (4)

8 Re-school interval (4)

Appendix A special inspection cylinder technical requirements (5)

Appendix B Combined Angle Gauge Measurement Results Uncertainty Analysis (6)

Appendix C Calibration Certificate Internal Page Format (10)

Combined angle scale calibration specification

1 Scope

This standard applies to the dial measuring range of 0 ° ~ 180 °, sub-degree value of 1 °, ruler measuring range (0 ~

300) mm, dividing the value of 1mm modular angle scale calibration.

2 References

This specification cites the following documents.

JJG1-1999 steel ruler test procedures JJG33-2002 Universal angle foot test procedures General measurement terms and definitions Evaluation and Expression of Uncertainty in Measurement JJF 1094-2002 Measurement instrument characterization when using this specification, care should be taken to use the current valid version of the referenced offer.

3 Overview

Combined angle gauge by the angle ruler, ruler, center gauge, scale seat, sub-dial and other components, the structure shown in Figure 1 Show. Including the base, sub-dial, ruler can form protractor.

Figure 1 Schematic structure

1-center gauge; 2-foot holder; 3-indexing plate; 4-ruler; 5-angle foot;

Combination angle gauge is mainly used for machining, wood processing angle, length, height measurement and centering Bit and so on.

4 measurement characteristics 4.1 flatness or straightness of each measuring surface the measuring surface does not allow convex, ruler measuring surface straightness is not greater than 0.02mm, other measuring surface flatness