IS 2988 : 1995 Vernier theodlite - Specification

1 Scope

1.1 This standard covers the functional and general requirementsof vernier theodolites. The theodolite shall be referred to not bythe size of its horizontal circle but by the least count of itsvernier, such as vernier theodolite of 20 seconds.

2 References

IS 988 :1959General requirements for optical components

IS 1632 :1993Optical instruments-Bubbles-Specification

IS 1764 :1961Trough compass

IS 10236 : Part 11 :1985 Procedure for basic climatic anddurabilitytests for optical instruments :Part 11 Vibration test

IS 10236 : Part 14 :1986 Procedure for basic climatic anddurabilitytests for optical instruments :Part 14 Driving rain test

IS 10236 : Part 15 :1986 Procedure for basic climatic anddurabilitytests for optical instruments :Part 15 Drop test