Why do we use zero correction?
Answers
In some calculations or processes the difference between actual zero and indicated zero is significant or perhaps even critical.
In some calculations or processes the difference between actual zero and indicated zero is significant or perhaps even critical.
You can get a small idea what this means but considering the following:
A standard pressure gauge will measure zero both at the edge of the ocean and on top of a mountain despite the fact the air pressure is significantly different. Atmospheric pressure at sea level is about 14.69 psi. On top of Mount Everest the pressure is 4.89 psi. That’s a difference of close to 300% yet you would get the same reading in both places because the gauge would measure the difference between the air pressure around it when filled and the air pressure it was connected to. .
Hope you understand