P<sub>+</sub> = Hρg+ h<sub>1</sub>ρg+P<sub>0</sub> P<sub>-</sub> = h<sub>2</sub>ρg+P<sub>0</sub><br>ΔP= P<sub>+</sub>- P<sub>-</sub> = Hρg+ h<sub>1</sub>ρg+P<sub>0</sub>- h<sub>2</sub>ρg-P<sub>0</sub><br>= Hρg-( h<sub>2</sub>- h<sub>1</sub>)ρg<br>H=0, ΔP=-( h<sub>2</sub>- h<sub>1</sub>)ρg<br>需要零点迁移,迁移量: -( h<sub>2</sub>- h<sub>1</sub>)ρg<br>量程是: H<sub>max</sub>ρg.
P+ = Hρg+ h1ρg+P0 P- = h2ρg+P0ΔP= P+- P- = Hρg+ h1ρg+P0- h2ρg-P0= Hρg-( h2- h1)ρgH=0, ΔP=-( h2- h1)ρg需要零点迁移,迁移量: -( h2- h1)ρg量程是: Hmaxρg.
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