The SC Series Smart Electric Displacer Level Transmitter is designed based on Archimedes’ principle of buoyancy. It is used for measuring the level, interface level, and density of liquids.

It features high measurement stability, particularly suitable for level and interface level measurement applications with small ranges, high temperatures, high pressures, and low-density media. It is capable of measuring interface levels where the density difference between media is very small.

The transmitter can be conveniently configured and managed (monitored) remotely via the HART communication protocol using a PC or a universal handheld terminal, or operated locally using conventional keys.

The LC3010 series smart float level transmitter is composed of the DLC3000 digital level controller, a float chamber, a float, a torsion tube system, and other components.

The float is submerged in the liquid within the float chamber and rigidly connected to the torsion tube system. The force acting on the torsion tube system is the net force resulting from the float’s weight minus the buoyancy force it experiences. Under this net force, the torsion tube twists by a certain angle.

Changes in the level, density, or interface height of the liquid within the float chamber alter the buoyancy force acting on the submerged float, thereby causing the torsion tube’s angle of twist to change accordingly.

This change is transmitted to the lever assembly inside the digital level controller, causing the magnet fixed on the lever assembly to displace. The displacement is then sensed by a Hall element and converted into a Hall voltage.

The DLC3000 digital level controller employs a microcontroller and associated electronic circuits to measure process variables, provide current output, drive the LCD display, and enable HART communication capabilities.

The microcontroller receives the electrical signal after it has undergone environmental temperature compensation and linearization. It also compensates for changes in liquid density caused by variations in process temperature.

The LCD can display the analog output, process variables (level, interface height, or density), process temperature, the torsion tube rotation angle, and the percentage range of the variable, among others.

• LCD Digital Display : Features a clear and easy-to-read liquid crystal digital display.

• Outstanding Performance : Exhibits excellent resistance to high temperature and high pressure, superior anti-vibration performance, stable quality, and reliable operation.

• Series Design & Wide Applicability : Employs a modular series design with multiple installation options, making it suitable for a wide range of applications, including various storage tanks, process vessels, atmospheric pressure tanks, and pressure vessels.

• Intelligent Structure : Incorporates an intelligent design that allows for parameter setting , calibration , and fault indication functions.

• Standard Output Signal : Provides a standard two-wire 4~20mA output signal. No dedicated secondary instrument is required, and it can be seamlessly connected to a computer.

• Advanced Calibration & Compensation : Equipped with temperature compensation and software correction capabilities.

• Special Calibration Functions : Includes zero suppression function and mid-point calibration function .

Installation Direction of the Level Gauge Control Box:

When the control box is installed on the right side of the float chamber, it is designated as a right-handed head. When installed on the left side, it is designated as a left-handed head. The control box can be installed in any of the 8 alternating positions around the float chamber. As shown in the figure below :

Installation and Precautions:

1.Vertical Installation : The transmitter must be installed vertically to ensure normal operation.

2.Handling and Installation : During handling or installation, the level transmitter must never be thrown, dropped, or struck. When transporting, it should be packaged according to the manufacturer’s provided packaging box and method.

3.Float Handling : When installing or removing the float, excessive pulling or pushing force should be avoided to prevent damage to the instrument.

4.Internal Float-Type Transmitter Installation : When installing an internal float-type transmitter, ensure that the float does not come into contact with any surrounding objects, as this can create friction and affect measurement accuracy.

5.Grounding and Explosion-Proof Installation :

•The internal and external grounding of the instrument must be secure and reliable.

•The installation of explosion-proof products must strictly comply with the relevant provisions of the 《Trial Regulations for Electrical Safety in Explosive Hazardous Locations of the People’s Republic of China》 .

•Cables for intrinsically safe systems should be laid away from interference sources to avoid affecting the normal operation and explosion-proof performance of the instrument.

6.Locking Switch Position : During normal operation, the locking switch below the level controller must remain in the open position (blocking the torque tube lock hole).