Monday, July 19, 2010

VERNIER CALIPER & MICROMETER SCREW GAUGE For IGCSE students

The parts of vernier caliper or Micrometer screw gauge is not important .

Important stuff is
How to take the readings from vernier caliper.

The first thing is to find the Least count of the Instruments

Formula is      Least Count = Minimum division on main scale
                                            ---------------------------------------------------
                                              Total No. of division on vernier scale/rotating scale
This formula is applicable for both vernier caliper and the screw gauge

To take down the readings use the formula

Total Readings of the object = Main scale reading + (Vernier scale reading x Least Count)
                                                      MSR              + (VSR     x  LC  )


The Lest count for Vernier caliper is 0.1mm or 0.01cm
                              Screw gauge  is 0.01mm or 0.001cm

2 comments:

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Unknown said...


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measuring instruments