Zero Elevation Calibration in Level Measurement
Wet Leg Condition
Condensation of the gas above the process liquid slowly causes the low side of the transmitter piping to fill with liquid. The pipe is therefore purposely filled with a convenient reference fluid to eliminate this potential error. This is called a wet leg condition.
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Condensation of the gas above the process liquid slowly causes the low side of the transmitter piping to fill with liquid. The pipe is therefore purposely filled with a convenient reference fluid to eliminate this potential error. This is called a wet leg condition.
In a wet leg application, the low pressure side of the level transmitter will always experience a higher pressure than the high pressure side. This type of installation requires that the height of the wet leg will always be equal to or greater than the maximum height of the liquid column (H) inside the tank.
Consider the scenario below:
Consider the scenario below:
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