Activity $17-3-$Differential Pressure Cell Calibration

A pressurized vessel is filled with liquid and the pressure is measured with a $\frac{d}{p}$ cell. The low$-$pressure side of the cell is connected to a purge system. The $\frac{d}{p}$ cell needs to be calibrated. The calibration is done by determining the pressure difference between the high side and low side of the $\frac{d}{p}$ cell in inches WC$.$

The tank contains water with a specific gravity of $1\mathrm{.}0.$ The maximum height of the liquid in the vessel, $h,$ is ${86}^{\text{'}\text{'}}.$ The purge system is turned OFF so that the connection tube to the low$-$pressure side of the $\frac{d}{p}$ cell is empty and the cell is directly exposed to the pressure in the tank above the water.

Calculate the $\frac{d}{p}$ cell calibration range.

The tank contains a liquid with a specific gravity of $1\mathrm{.}1.$ The maximum height of the liquid in the vessel, $h,$ is ${90}^{\text{'}\text{'}}.$ The connection tube on the low$-$pressure side of the $\frac{d}{p}$ cell is purged with nitrogen.

$2.$ Calculate the $\frac{d}{p}$ cell calibration range.