Even if the resistance of the hanging material on the sensor is small, no current will flow. The same as the case of the coaxial cable, there is no potential difference between the center probe and the shielding layer. will not affect.įor the problem of the influence of the hanging material on the sensor, a new sensor structure, a five-layer concentric structure, and a sensor structure are used: * The inner layer is the center probe, the middle is the shielding layer, and the outer surface is the grounding mounting thread, which will be insulated with an insulating layer. Therefore, the temperature effect of the cable, the installation capacitance, etc. Since the center line of the coaxial cable has the above relationship with the outer shield, there is no potential difference between the two, and no current flows, that is, no current leaks from the center line, which is equivalent to no capacitance or capacitance between the two. The ground wire is another separate wire in the cable. The output is connected to the coaxial cable shield and then to the sensor's shield. The signal passes through a non-inverting amplifier with a gain of "1" and a strong driving capability. At the same time, the coaxial cable shielding layer is suspended at a level that is very small and very stable, but is equal to the measurement signal equipotential, in phase, and frequency, but has no direct electrical relationship, that is, the level of isolation from each other. The measurement signal at the center of the circuit unit is connected to the center line of the coaxial cable and then connected to the center of the sensor. The important difference between point-to-bit RF admittance technology and capacitor technology is the use of three-terminal technology and the diversity of measurement para meters. Therefore, the RF admittance technique can be understood as a method of measuring admittance with high frequency current. Wide level control technology, "admittance" in "radio admittance" means the reciprocal of impedance in electricity, which is composed of resistive, capacitive and inductive components, and "radio frequency" is high frequency. The anti-hanging material (the material adhered by the sensor is called the hanging material) has better performance, more reliable work, more accurate measurement and more applicability. The RF admittance level control technology is developed from the capacitive level control technology. The amplitude and frequency of the tuning fork will be abrupt, and the intelligent circuit will detect this and convert this change into a switching signal. When the tuning fork is in contact with the measured medium. The tuning fork works by vibrating the tuning fork at a certain resonant frequency through a pair of piezoelectric crystals mounted on the base of the tuning fork. This can be done as a switch or as a continuous measurement. Radio frequency sodium is a method of measuring admittance with high frequency current. Type 61 is installed directly at the switching point, 62 has an extension cable (max 80 m) and 63 is the version with extension tube (max 6 m).The difference between the tuning fork level switch and the RF conduction sodium level switchThe tuning fork can only be used as a level switch, which triggers the switch by detecting changes in the frequency and amplitude of the vibration. VEGAWAVE for up to 10 mm grain size, above that, VEGAVIB. Vibrating level switches are used as overfill protection or empty alarm in bulk solids, which can be either in granulate or powder form. If the vibrating probe comes into contact with the measured product, the oscillation rate changes and the vibrating level switch outputs a switching command. The basis of point level detection with vibrating level switches is a vibrating rod or vibrating fork. A downstream device can be actuated directly with this switching signal (e.g. It provides a switching signal on its own. it can be operated without external evaluation. The instrument is connected with standard cable. The instrument only has to be mounted in such a way that the vibrating element is at the height of the desired switching point. The level switch can be installed in any position. The switching point can be up to 6 m away from the process fitting. VEGASWING 63 is the version with extension tube. VEGASWING 61 is mounted directly at the switching point Vibrating level switches are used as overfill protection or empty alarm. If the vibrating probe comes into contact with the medium, the oscillation rate changes and the vibrating level switch outputs a switching command. The basis of point level detection with vibrating level switches is a tuning fork, i.e.
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