Zero correction ( ZC ) = -0.07 cm No of ObsĬoinciding with the main scale divisions ( n) Suppose zero error is = 0.7 cm which is positive error so: Take at least two readings by inserting the cylinder cross-section wise between the jaws and get the average diameter.Apply zero correction to obtain the correct diameter.Add the values ‘M ‘ and ‘X ‘ to the observed value (Y) of diameter.Multiply this “n” with the least count and calculate the value of fraction (x) which is to be added in the main scale reading.Note the vernier division (n) which exactly coincides with any one division of the main scale.Record this value as the main scale reading (M).Note the main scale division which is either coinciding or is on the left of vernier scale zero.Hold the cylinder between the two jaws of the vernier caliper.Close the jaws to check the Zero error and calculate the zero correction. We can learn about the use of V.C with the help of an example by measuring the area of the cross-section of a solid cylinder by measuring its diameter with Vernier caliper.
#LEAST COUNT OF VERNIER CALIPER HOW TO#
Read also: Types of errors in physics How to read a vernier caliper? Since the zero error is positive, the zero correction will be negative. If the zero of the Vernier scale is to the right of the zero of the main scale then the error is positive. Since the zero error is negative, the zero correction will be positive. If the zero of the Vernier scale is to the left of the zero of the main scale then the error is negative. Otherwise, the instrument has an error called zero error. When the jaws of Vernier calipers are brought into contact, the zero of the Vernier must coincide with the zero of the main scale.
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There is another method to find the least count which is given as: Least count of vernier caliper formula It is the difference between one main scale division which is 1 mm and one vernier division which is (0.9).
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The smallest reading which can be accurately measured with a vernier caliper is called its least count (L.C), it is also known as the vernier constant.Read also: Micrometer screw gauge least count The movable jaws are attached to the vernier and they slide along the main scale. The jaws A and B are fixed where B and D are movable. The upper jaws C and D are used to measure the internal diameter of objects like a hollow cylinder or tube. The thickness or external diameter of an object. The lower jaws A and B are used to measure length. Parts and function of vernier caliper vernier caliper