Explain how you would determine the constants of a tachometer. What are the advantages of an analytical lens used in a tachometer?

Explain how you would determine the constants of a tachometer. What ar

1.	Explain how you would determine the constants of a tachometer. What are the advantages of an analytical lens used in a tachometer?
Answer» The Stadia Interval Factor (K) and the Stadia Constant (C) are known as tacheometric constants. Before using a Tacheometer for surveying WORK, it is required to determine these constants. These constants are also termed as - Stadia Interval Factor (K)aka Multiplicative Constant. (f/i)Stadia Constant (C) aka Additive Constant. (f+i) [Diagram. ( Instrument & staffs set to determine Tachometric Constants) ] CONSIDER, f - Focal length of OBJECT glass. where, f1 - distance between object glass to staff f2 - distance from centre of object glass to the plane of diaphragm i - Stadia Intercept. S - Staff Intercept. d - Distance from centre of object glass tube to VERTICAL axis of instrument. l

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Explain how you would determine the constants of a tachometer. What are the advantages of an analytical lens used in a tachometer?

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