LC= Value of one main scale division Total number of divisions on vernier
One of the main divisions are sub-divisions.
verniya Caliper divisions part shows. "collusion line on a small "collusion line is great.
1. outside jaws 2.inside caliper jaws 3.vernier inches 4.vernier centimeters 5.fine locking screw 6.coarse locking screw 7.fine adjust thumbscrew 8.main scale inches 9.main scale centimeters 10.depth probe
The scale divisions indicate the value of measuring units of volume, temperature, pressure, etc.
0.1 mm
because its senstivty is 0.1 mm.......got it or not????
first find out least count of main circular scale in degrees,then divide least count of main scale by total divisions on cylindrical scale(this cylindrical scale works as vernier scale for fist one,its least count will be in minutes) then further divide least count of cylindrical scale by total divisions of small vernier scale which touches it,(this small scale works as vernier scale for cylindrical scale and its least count will be in seconds).
The value of each main scale divisions is half a degree(30') . The number of vernier scale divisions is 30. 29 main scale divisions are divided into 30 vernier scale divisions (30 VSD = 29 MSD ) Therefore value of 1 VSD = 29/30 MSD. Least Count (L.C.) = 1MSD - 1VSD = 1MSD - 29/30 MSD = 1/30 MSD = 1/30 x 30' (L.C.) = 1' (1 minute)
We need two readings. One is Main scale reading and the other is vernier scale reading. Main scale reading will be read on the main scale. We need an indicator to read it. Right? The marking ie zero of the vernier is that indicator. So the reading on the main scale which has been just crossed by zero of the vernier is taken as Main scale reading. Now to get VSR, we need vernier scale coincidence. How do we get this? Any one of the divisions of the vernier will be found coincided with some divisions marked on the main scale. We don't worry about that main scale division but we concentrate only on the vernier scale division. This is VSC This VSC is to be multiplied by least count. So VSC x LC gives the VSR Now MSR + VSR gives the accurate reading.
To use the vernier scale, you find the reading on the fixed scale immediately to the left of the pointer, then you look along the sliding scale until you come to the place where the divisions on the fixed and sliding scales match up, and this gives you the subdivision of the main fixed scale divisions. Thus if the fixed scale is divided into mm, you will be able to read 1/10 mm from the vernier. I suggest you look up Wikipedia 'Vernier Scale' which has illustrations of this
where on the vernier caliper would you read to obtain the vernier scale reading
LC= Value of one main scale division Total number of divisions on vernier
No unit for vernier scale coincidence. But as we multiply it by least count which has unit then we get vernier scale reading with the same unit. Of course main scale reading and vernier scale reading would have the same unit
1)Main Scale is fixed(It does not move) Vernier scale slides along main scale.2)Least count of Mainscale is 0.1cmLeast count of vernier scale is 0.01cm
The Fahrenheit scale has 180 divisions or degrees
Vernier scale consists of main scale and vernier scale. The first line or the zeroth line coinciding with the main scale reading is the main scale reading. The vernier line except zeroth line coinciding with any line on main scale is the main scale reading.