RF admittance level gauge

RF admittance level switch SA100-146-S18-I; The level gauge, abbreviated as level gauge, is divided into protective electrode and total length. It is based on radio frequency capacitance technology: radio frequency is applied to the probe to continuously analyze the surrounding environment. Since the dielectric constant and conductivity of all media are different from air, the small changes in capacitance caused by the probe coming into contact with the media are detected by the circuit and converted into switch signal output. Its anti adhesion circuit only responds to changes in capacitance caused by changes in material level, thereby eliminating signals generated by material accumulation. RF admittance level switch SA100-146-S18-I; Product details of level gauge RF admittance level switch SA100-146-S18-I; The level gauge adopts admittance measurement method to comprehensively process impedance and capacitance information, overcoming measurement errors caused by hanging materials on sensing elements, and improving measurement accuracy and reliability. It can be widely used for material level (interface) control in industries such as power plants, petroleum, metallurgy, chemical, pharmaceutical, food, and papermaking. RF admittance level switch SA100-146-S18-I; The level gauge has anti hanging material technology with radio frequency admittance *, which can detect level alarms, low level alarms, and can be used to measure conductive and non-conductive objects. Commonly used types include type, heavy-duty probe type, temperature resistant ceramic probe type, material blocking switch, coal blocking switch, etc. The important difference between RF admittance level switch technology and capacitive technology lies in the diversity of measurement quantities and the three electrode technology. The diversity of RF admittance measurement lies not only in measuring electrical capacity, but also in measuring resistance and inductance, making the measurement more accurate. The three electrode technology includes electronic units and sensors. A shielding electrode is added between the measuring electrode and the electrode to protect the measuring electrode from the influence of hanging materials Features: 1. Simple and fast calibration, easy installation, and beautiful appearance. 2. Stable product performance. 3. Anti adhesion (hanging). 4. Strong universality and wide applicability of various models. 4. Can be used in conjunction with PLC programmable controllers or DCS distributed control systems to achieve automatic detection and control of process flow. 5. Fast calibration method for RF admittance level controller: 1. Connect the probe and meter head correctly, and connect the power supply. Pay attention to whether the power supply voltage is correct. Preheat for 3 minutes. 2. Only the three potentiometers on the surface panel can be adjusted within the range of 8 o'clock to 4 o'clock, and cannot be rotated 360 degrees, otherwise the potentiometers will be damaged. Green light represents normal status, red light represents alarm status. 3. Potentiometer F - represents fine adjustment (abbreviated as F); Potentiometer C - represents coarse adjustment (referred to as C); Potentiometer DLY - represents delayed output (DLY for short); The delay time is 0-30 seconds, which can be set or turned off arbitrarily. 4. Generally, place the FALL SAFE plug in the L position. 5. Place F at the 12 o'clock position, adjust C, and reach the critical point around the 10-2 o'clock position (first turn the green light clockwise to the red light, and then turn the red light counterclockwise to the green light position). This position is called the monitoring point. If it is already a red light after power on, adjust C counterclockwise. When the red light turns green, it is the critical point. 6. Adjust F clockwise again to find a more precise critical point. At this time, a green light status should be displayed. 7. If it is applied to the powder ash system, rotate F counterclockwise by about 20 degrees from the critical point position. The RF881G RF admittance level controller is currently a cutting-edge alternative product for level controllers, which has been widely used in Europe, America, and Japan. Domestic users are also using it to replace old products. It can detect all materials without being affected by changes in parameters such as density, particle size, chemical composition, sedimentation viscosity, and conductivity. Widely used for controlling various materials such as liquids, powders, slurries, solids, etc. (b) If it is applied to the coal transportation system, rotate C clockwise by about 10 degrees from the critical point position (supply voltage 220VAC, installation interface NPT3/4 ', probe 1000mm). The electronic unit mainly consists of oscillators, bridges, decoders, amplifiers, relays, and other parts. Features: Whether it is granular materials, viscous materials, or mixed media, they can be measured. Working principle: RF admittance level controller, level controller, level meter RF admittance The controller operates based on the principle of frequency bridge. *The electrical properties of all substances are somewhat different from those of air. When the probe is immersed in the material, there are significant changes in the conductivity and electronegativity between the probe rod and the container wall. These changes are used to detect the presence of air or material around the probe. The controller consists of two parts: electronic circuit and probe. The electronic circuit includes a frequency oscillator, a detection circuit, an output circuit, and a probe consisting of a measuring pole and a protective cover. The pole and protective cover are insulated from each other, as well as from the grounding container. The frequency oscillator provides a stable RF voltage, which is applied to the detection pole through a bridge. When the material touches the detection pole, the bridge outputs an unbalanced voltage, which is then demodulated and amplified