ELECTROSTAIC CAPACITY LEVEL SWITCH DUY/FL 日本旅行会社
The level switch, model LIC-S45 is a rugged model of mass production designed and manufactured by piling up many experiments, data and results on the basis of actual situations of a variety of automatic control plants and site requirements.
■ CONFIGURATION
① Electrode By means of respective electrodes, the change of physical position is detected as the change of capacitance or as the synthetic impedance of capacitance and resistance. ② Transmitter body It changes the change of capacitance from the electrode to the large or small oscillation voltage, and activates the relay. ③ Lead cable (High-frequency coaxial cable RG-63U) It performs the transmitter body and the electrode. And, since it constitutes a part of circuit constant, care is paid for the length change. 1
■ CHARACTERISTICS
① Since there is no mechanical moving part, it is of long life, and the maintenance and inspection can be easily made. ② By the simple dial operation, the optimum sensitivity adjustment can be performed. ③ To prevent bad influences from the circumjacent environment, it is of waterproof sealed construction. ④ The electrostatic elimination circuit of our peculiarity is incorporated. The electronic circuit is protected from influences by the electrification of measuring material. 5) Influences by the adhesion of dust, water drops, etc. to the main section of maintained for a long time. 6) It is provided with the mechanical strength. ⑦ It can be used also for the high-temperature and high pressure measuring material. 8) It can fully correspond also to the strength and weakness of hydrogen ion concentration and vibrations. 9 The acidproof and alkaliproof material is used in the wetting part, which is excellent in the corrosion resistance. @ By the delay circuit (option), the malfunction by quick variations of physical position like waves, sprays, etc. is prevented, and it is properly attended. @ For the electronic time , various kinds like 1 to 5 seconds, 1 to 4 minutes (variable by the knob), etc. are available.
■ PRINCIPLE OF OPERATION
The electrode as illustrated to the right forms a capacitor making the circumferential wall of hopper as the relative pole. The capacitor increases and decreases the capacity by the dielectric constant of an oscillating current is controlled, and output as the ON/OFF signals of power relay. ■ Nomenclature and Standard Specifications of Transmitter Body
■OPERATION OF RELAY
The standard operation of relay internally installed in the model LIC-S45 can made as shown in fig. 2 as required. In case the operation in Fig. 2 is desired, designate it as the model LIC-S45A when placing an order. ●Example of Level Controlシ
■MOUNTING
●Transmitter body, model LIC-S45 The transmitter body is of out door construction, and in case it is installed in a place exposed to the rain or in place exposed to the direct rays of the sun, mount a cover.
●Electrode
► In case some electrodes are mounted by putting them in a line, keep away the distance between electrodes by more than 200mm to a minimum. At that time, according to the type of electrode, the distance comes to be different a little.(For example, 500mm to a minimum in case of KP-10, etc.) Stool ► Install them keeping away the electrode mounting position as much as possible from the falling spot of an object. ▷ Make the distance between the electrode and the transmitter to approximately 10m. Terminal block < Precautions on Connection> ●Between the electrode and the transmission part, the exclusive coaxial cable is used. ●For cables used to the power line and signal line, use cables of 10 φ   to 15 φ of external dimensions.
●Specifications

%The delay circuit is added only in case there is a request. Likewise, in case of electronic timer type, Designate it. XThe specifications, appearance, etc. described in this catalog are subject to change without notice for the performance improvement. च Standard Type Electrodes, Their Characteristics and Examples of Use
※PT 3/4 OR PTI B
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ORE TYPE LEVEL SWITCH
The requirements demand to the level switch destined to bulk materials, particular matters and granular matters are the prudent measures to clear various bad conditions like mechanical strength, adhesion coarse particulates and water drops, direct rays of the sun in summer, low temperature in winter, etc. supposing that it is equipped to a large storage tank. The level switch, model LIC-S45 is a level switch for exclusive use of ores designed on the basis of numerous experimental results conducted with cooperation given of a variety of factories by investigating minutely actual situations of ore plants and data on properties of bulk materials, particular matters and granular matters. ①Transmitter body (Model LIC-S45)
■ CONFIGURATION
The level switch, model LIC-S45 is constituted by ① a transmitter body, ② electrodes and  ③  an exclusive lead cable. Fig.l shows the most basic application of level switch, model LIC-S45 that the electrode, model KP-08 is installed to the upper limit and the electrode, model KP-10 to the lower limit. 7 ②Electrode (KP-10) ③Exclusive lead cable (High - frequency coaxial cable : RG-63U)
■ CHARACTERISTICS
① It has a sufficient degree of allowance for a variety of stresses like tensile load, vibrations, impact, etc. ② It does not malfunction even if irregular state changes of ores like inflow of rain water, drying for a long period of time, etc. occur in the same storage tank. ③ It suppresses influences by the adhesion of coarse particulates, water drops, etc. to the main section of electrode, and maintains the stable operation for a long period of time. (Patent pending) ④ To prevent the electronic circuit from the static electricity, the electrostatic filter is incorporated. It is not influenced by ores electrified (coarse particulates), etc. © It can be used with a sense of relief for coarse particulates and granular matters to the coke oven, rotary kiln, hopper related to the electric furnace, etc. © Since electrodes are separated from the body, the installation of electrodes can be made in a place to where normally persons cannot make access, and the work like adjustment, inspection, maintenance, etc. is extremely simple. ⑦ For the instantaneous operation prevention because of the drop of measuring object and electrode swinging at idling, the delay circuit is incorporated. It can make the delay till 0.5 to 2 seconds. ® The length of electrode can be freely changed in the site. Ore Type Electrodes,
Application

■MOUNTING
●Transmitter body, model LIC-S45 The construction of transmitter section is of outdoor sealed construction, and mount a cover in case it is installed in a place exposed to the rain or a place exposed to the direct rays of the sun.
●Electrode
• Keep away the distance between electrodes by more than 500mm to minimum. • Install it by keeping away the electrode mounting position as far as possible from the drop spot of conveyor chute. • Make the distance between the electrode and the transmitter to approximately 10m. (5m and 10m are standard.) a. In case of sealed tank
b. In case of open tank
c. An example in case it is impossible to mount it directly to the hopper
■ADJUSTMENT ORDER
DOperation indicating lamp A ②Operation indicating lamp B 6 Terminal block (3Fuse @Power transformer 4Knob for adjustment (8PTM counter 5/lrimmer for auxiliary A. Empty the tank, and so on, and fully separate the measured material from the electrode. B. It is safer to keep the connections of NO, COM, NC, etc. related to the external circuit left till the completion of adjustment. C. Set the value of PTM counter (hereinafter called PTM) to "O". D. Set the scale of knob for adjustment (hereinafter called knob) to "O". E. After ending the above mentioned operation, feed the power supply. At this time confirm that the relay operation indicating lamp B In case the relay operation indicating lamp B (hereinafter called lamp B) comes on. In case the relay operation indicating lamp A (herein after called A) Comes on, since there is an abnormality (defective connection) in the electrode section, make the revision. F. Come to raise the numerals of PTM to 0 → 1 → 2, and stop it where the lamp is switched to B → A. G. Then, turn the adjusting knob silently clockwise, and confirm the point where the lamp is switched to A -+ B. This is called the base point, When there is no base point even though the knob is turned till the scale trimmer), and find again the base point. If the base point is found at the right side from the scale 5, there is no hindrance in the adjustment, and since it is convenient in terms of the maintenance to make the total number of switches used left as the same base point, it is recommended to turn the above mentioned little by little and make the scale 8 as the base point. H. When the base point is determined, lower the knob in the direction of "O" by approximately 2 to 5 scales. With the above, the adjustment is completed. Raise and lower the measured material 2 to 3 times after adjustment, and Confirm the operation. Adjustment point 10