Servo floating surface measurement systems use fluid displacement to measure continuous surface. This method is considered more accurate than wired floating systems and surface tracking systems.
Servo Level Measurement
A cedar cable level gauge is used for displacement, which regularly measures the liquid in the tank. This is done by moving the receiver outside the tank until it comes in contact with the liquid surface. By changing the liquid level in the tank, the system always aims to maintain the displacement in equilibrium, which creates the level measurement. This type of system, in addition to performing level measurements, is able to raise alerts such as high, low and low levels.
The composition of the floating material can affect the accuracy of the surface measurement. Magnetic floats are commonly used in continuous float type surface detectors. Among these vessels, the highest measurement accuracy is obtained with limiting magnet technology. Magnetic disk floating surface detectors are used as a highly accurate device for measuring liquid levels.
This type of level measurement system is inherently safe and is measured continuously. This method has a long and successful history in implementing “clean” measurement programs such as the gasoline storage industry. The initial setup of this type of system is to ensure accurate measurement of the critical level. The adjustment process requires the tank to be immersed manually. This allows the compensation to be properly determined and applied. Proper setup and maintenance allows floating systems to be used with the functionality used in arrest transfer, inventory and density measurement applications. Although this is a good level measurement method there are still some limitations with this method.
For example, to provide reliable continuous level measurements, this type of system requires a high level of maintenance and cleaning to ensure that the contents of the tank do not penetrate into the system devices. However, if this is observed, serological floating systems are reliable and highly accurate.
Floating systems with servo function are also fragile tools. Vibration from people walking or even standing on the roof of a tank attached to it can cause it to bounce and go out of calibration. Wire failure is another common problem with this type of system. However, this defect is usually acknowledged immediately.
In a fixed well, for example, if the tank subsides, it may rest on the side of the pipe. It is common in industry to test this type of level gauge by manually moving the float up the tank and then allowing it to float to the liquid surface. This test method is used when the surface measurement is thought to be incorrect. This is a simple initial check to do instead of feeding the tank. Modern floating gauges with function have internal functions that can be mounted from the float upwards to ensure measurement.
These and other similar features are built into these newer meters so they can be easily tested. This goal is to overcome untested systems due to the complexity perceived by the system by the operators. The latest version of this technology Currently, cedar level measuring systems have been approved by a number of European governments and organizations for the transfer of custody due to the accuracy of these measuring systems.
Accurate measurements in millimeter order can be made using servo-floating gauges to measure gasoline levels. Perceived problems with servoser floating surface measurement systems fall into the category of mechanical maintenance and wear:
Maintenance problems
The activities involved are not complex, but show the necessary care while being maintained. After maintenance, it must be ensured that the gauge behaves as expected, and a scale weight calibration is performed to ensure the accuracy of the surface measurement. Gasoline does not have a major impact on floating metering systems as long as it is accurate enough to ensure that the right materials are used for sealing and gaskets. However, the same cannot be said about the impact of biofuels.
These devices can be damaged due to some corrosive biofuel additives. This can be problematic because some tanks may be used to store biofuels and gasoline in different parts of life. This change may not occur in the management of company change methods and therefore may not be subject to impact analysis or risk assessment.
Mechanical wear
The technology relies on many mechanical components, all of which are prone to use over time. These components are typically servo motors, gear trains, or magnetic bearings. The size of these parts is usually determined by irregular measurements or floating gluing. Annual maintenance also allows worn parts to be identified and repaired or replaced if necessary.
When stored gasoline or other materials in the Buncefield area come in contact with equipment, it can accelerate and increase rust on metal parts. In some cases, this can also lead to measurement compensation. To measure the level of gasoline, the float must be in contact with the level of gasoline. This is needed primarily so that the sensors on the float can determine whether the surface is gasoline or water level. Measurement error can be caused by system software. It is possible that a bug in the software associated with buoyancy will lead to inaccurate measurements.