Close the jaws lightly on the object to be measured. The main scale reading is the first reading on the main scale immediately to the left of the zero of the vernier scale (3 mm), while the vernier scale. Consider the micrometer reading shown below: If this was a 0 - 1 micrometer it would. The Vernier caliper is an extremely precise measuring instrument the reading error is 1/20 mm 0.05 mm. In the same way, if the red arrow indicates a day on the yellow sector of the outer scale, the hours are also read from the yellow sector on the vernier scale. Vernier micrometers can read to one ten-thousandth of an inch (0.0001). These hours are added to the days indicated on the outer ring. If the arrow points to a number in the blue sector of the outer scale, the accurate value is also read from the blue sector of the inner vernier ring. The age of the moon accurate to three hours is indicated where the next mark on the vernier ring aligns with a mark on the outer ring.ģ.

A Vernier scale is an auxiliary sliding scale that can be used to more accurately read the values on a fixed. The red arrow indicated the age of the moon in days.Ģ. You should record 9.2 mm for the measurement shown. Using the moon vernier is straightforward:ġ. Two red marks on the scale indicate the new moon and full moon.Ī vernier scale on the inner vernier ring increases the accuracy of the indication by up to three hours. The reading is where the vernier and main scale marks are most closely.

On this high precision moon age scale, a red arrow indicates the age of the moon in days. vernier scale represents 0.01 cm, which gives you the resolution of the instrument. On the dial of the Lune Exacte, there is a conventional phase of the moon indication and an additional age of the moon indication with its moon vernier scale at six o’clock.

How to read vernier scale