Linear Intorpolation

Ricochet J · 14 Dec 2009 at 17:05

Lets say I have 1.7 cmH20 manometer pressure difference at 21.5°C. Using linear intorpolation, or otherwise how can I convert this to SI units Pascals (Pa)?

I don't have a correction sheet to hand for cmH20 to Pa to compensate for the temperature difference.

Ta

Ricochet J · 14 Dec 2009 at 18:02

Anyone?

kylew · 14 Dec 2009 at 18:08

The only thing I can think of is:

Cool story bro! :cool:

(yes, I have nothing constructive to add, I don't even know what that means).

dangerstat · 14 Dec 2009 at 18:14

I googled for the conversion table and found..... your post

p4radox · 14 Dec 2009 at 18:21

Linear interpolation would normally be used when a conversion table is given. It's to generate an approximation when the value you want is between two data points.

tbh, I'd just use:

p (gauge) = density*g*deltah. It's just a simple application of hydrostatic pressure. The value for density is near enough 1kg/litre at sea level and room temperature, and you can usually assume incompressibility.

edit: about 167Pa?