89results about "Drying/impregnating machines" patented technology

The invention relates to the technical field of aluminum electrolytic capacitors, in particular to an anode foil production device and method for an aluminum electrolytic capacitor. Comprising a foundation assembly, the foundation assembly comprises a base, a portal frame is installed on the top of the base, and a hollow conveying belt is installed in the base; a drying assembly is installed in the portal frame and comprises an upper drying bin fixedly connected into the portal frame, and an upper drying rod is arranged at the bottom of the upper drying bin. A lower drying bin is fixedly connected into the base and located in the middle of the hollowed-out conveying belt, and a lower drying opening is formed in the upper portion of the lower drying bin. Aiming at the defects in the prior art, the invention provides the anode foil production device and method for the aluminum electrolytic capacitor, which can effectively solve the problems of anode foil deformation and surface damage caused by overlarge airflow impact during drying and material performance change caused by local high temperature in the prior art.

The utility model discloses a core-containing impregnating machine for a solid-state capacitor, the core-containing impregnating machine for the solid-state capacitor comprises an impregnating tank and a sealing cover, the sealing cover comprises a normal sealing cover and an auxiliary sealing cover, the normal sealing cover is arranged on the impregnating tank and covers the impregnating tank, and the auxiliary sealing cover is arranged on one side of the impregnating tank. When the iron bar located in the middle needs to be taken out, the normal sealing cover and the auxiliary sealing cover can completely cover the impregnation tank all the time in the process of moving the normal sealing cover and the auxiliary sealing cover, when the normal sealing cover and the auxiliary sealing cover move to the preset position, the normal sealing cover and the auxiliary sealing cover are far away from each other, a small gap is exposed, and the iron bar is taken out. Then the normal sealing cover and the auxiliary sealing cover are close to each other and abut against each other until the normal sealing cover and the auxiliary sealing cover are closed and completely cover the impregnation tank, and then the normal sealing cover and the auxiliary sealing cover are moved and reset at the same time. When an iron bar located in the middle is taken out, it can still be guaranteed that the area, exposed in the external environment, of the impregnation tank is minimum, and the influence of the external environment on the interior of the impregnation tank is reduced.

The utility model relates to a capacitive oven. The capacitive oven comprises a frame body, a lifting piece and a limiting assembly. The frame body comprises a first mounting position and a feeding and discharging station, and the first mounting position is used for mounting a baking tray; the lifting part is arranged below the first mounting position, and the lifting part is used for driving the baking tray to enter the first mounting position or taking the baking tray out of the first mounting position; a limiting assembly is arranged on the portion, close to the feeding and discharging station, of the frame body and used for limiting the position of the baking tray located at the first installation station. According to the capacitive oven, the baking efficiency of the oven can be improved.

The utility model discloses a pressurized impregnation device for an aluminum electrolytic capacitor, belongs to the technical field of pressurized impregnation, and aims to solve the problems that in the prior art, when the capacitor is impregnated, the capacitor is stacked in a screen frame and then descends into electrolyte in a box body to be impregnated, so that the operation is inconvenient and the like. Therefore, the innermost capacitor in the stacked capacitors is less in contact with the electrolyte than the outer capacitor, so that the impregnation efficiency of the innermost capacitor is lower than that of the outer capacitor, and the impregnation efficiency of the capacitors in the same screen frame is not uniform. Comprising an electrolytic tank, supporting rods are fixedly connected to the four corners of the upper side of the electrolytic tank, a top plate is fixedly connected to the upper ends of the supporting rods, impregnation mechanisms are arranged at the inner end and the outer end of the electrolytic tank, and each impregnation mechanism comprises a hydraulic cylinder installed in the middle of the upper side of the top plate; the right end of the lower side of the cover plate is fixedly connected with a connecting plate.

The invention discloses an aluminum electrolytic capacitor for automotive electronics and a preparation method of the aluminum electrolytic capacitor. The capacitor comprises a core package formed by winding an anode foil, a cathode foil and electrolytic paper, and an electrolyte impregnated in the core package. The electrolyte comprises a solvent, a solute and an additive, the solvent contains ethylene glycol monoalkyl ether, and the additive contains phosphotungstic acid. The preparation method comprises the steps of riveting, element winding, drying treatment, electrolyte impregnation, packaging, aging and the like, wherein the impregnation rate is controlled to be 1.31-1.51 in the electrolyte impregnation step. Through the optimized electrolyte formula and strict process control, the high-frequency ESR of the capacitor is remarkably reduced, the hydration corrosion of an anode oxide film is effectively inhibited, the high-temperature resistance and the mechanical vibration reliability are improved, and the harsh application requirements in the field of automotive electronics are completely met.

The utility model discloses a high-capacity low-ESR laminated solid-state aluminum capacitor which comprises a shunt capacitor body, and the shunt capacitor body comprises a plurality of capacitor split bodies which are stacked up and down and connected in parallel. Each capacitor split body comprises a plurality of capacitor chips, a conduction frame and a shell, the capacitor chips and the conduction frame are arranged in the shell, the two surfaces of the conduction frame are both provided with a plurality of superposed capacitor chips, an anode pin and a cathode pin are respectively led out from the two sides, facing the shell, of the conduction frame, and the anode pin and the cathode pin are connected with the shell. The anode pins of the plurality of capacitor split bodies are connected in a conductive manner, and the cathode pins of the plurality of capacitor split bodies are connected in a conductive manner. According to the invention, the plurality of capacitor split bodies which are stacked up and down and connected in parallel are arranged, and the anode pin and the cathode pin of each capacitor split body are connected in a conducting manner, so that the capacity and the yield of the capacitor can be effectively improved.

The utility model discloses a kind of baking mechanism and impregnation equipment, impregnation equipment includes baking mechanism, impregnation mechanism, feeding mechanism and fixed frame, baking mechanism and impregnation mechanism are connected on fixed frame, fixed frame is equipped with first station and second station, impregnation mechanism and fixed frame slidingly connect, impregnation mechanism selectively slides to first station or second station, feeding mechanism is used to transport material in baking mechanism to impregnation mechanism in second station position inside.The baking mechanism includes frame body and fan, frame body is opened with air inlet and air extraction hole, frame body has accommodating cavity, for accommodating multiple baking tray sequentially arranged along the height direction of frame body;Air outlet of fan and air inlet are connected, air inlet of fan and air extraction hole are connected.Compared with prior art, the baking mechanism of the application adopts fan baking, fan is forced to circulate hot air, so that heat rapidly penetrates into every corner of the capacitor, reduces local temperature difference.

The invention relates to the technical field of aluminum electrolytic capacitor manufacturing, in particular to a slitting lubricating and cleaning method for a sintered anode foil of an aluminum electrolytic capacitor. The lubricating and cleaning method comprises the following steps that S1, in the slitting process, an organic lubricant is applied to the contact area of a tool and a sintered anode foil; s2, after splitting is completed, the sintered anode foil is placed in isopropanol to be subjected to ultrasonic cleaning; s3, cleaning the sintered anode foil with water; s4, purging the sintered anode foil by using nitrogen; and S5, drying the sintered anode foil. By adopting the processes of lubrication, graded cleaning and mild drying, the problems of lubricant residue and incomplete cleaning in the splitting process are effectively solved, and the excellent performance of the sintered anode foil is ensured.

The invention discloses an aluminum electrolytic capacitor based on a ripple-resistant electrolyte and a preparation method thereof, and relates to the technical field of aluminum electrolytic capacitors. Comprising the following preparation steps: placing electrolytic paper between an anode foil and a cathode foil, winding to obtain a core, immersing the core in a ripple-resistant electrolyte for impregnation treatment, sealing the core after impregnation, putting the core into an aluminum shell, sealing the top with a rubber plug, and aging; the ripple-resistant electrolyte comprises the following raw materials in parts by mass: 40-60 parts of ethylene glycol, 3-5 parts of ammonium adipate, 1-5 parts of ammonium formate, 18-25 parts of an ammonium salt solution, 1.5-3 parts of composite polyester polyol, 3-6 parts of an additive, 1-3 parts of a flash fire improver, 0.5-1 part of a hydrogen elimination agent and 15-20 parts of deionized water.

A metallized film capacitor roll core end metal spraying system belongs to the technical field of capacitor manufacturing and comprises a pair of annular conveying belts which are arranged at intervals and rotate synchronously, and each annular conveying belt is provided with an upper conveying section and a lower conveying section which are horizontally arranged; the clamping assemblies are arranged between the two annular conveying belts, and a plurality of clamping assemblies are arranged along the track array of the annular conveying belts; the upper nozzle and the upper drying device are both arranged above the upper conveying section, and the upper nozzle is located behind the upper drying device in the conveying direction of the annular conveying belt; the lower nozzle and the lower drying device are both arranged above the lower conveying section, and the lower nozzle is located behind the lower drying device in the conveying direction of the annular conveying belt; the upper nozzle and the lower nozzle are used for conducting metal spraying treatment on the upward end face of the roll core, and the upper drying device and the lower drying device are used for drying substances for metal spraying of the end face of the roll core. According to the scheme, auxiliary work of metal spraying treatment can be effectively reduced, procedures are simplified, cost is saved, and the metal spraying quality can be improved.

The invention belongs to the technical field of capacitor core package processing, and particularly relates to an impregnation processing device and method for a capacitor core package. A set of containers are arranged on the top face of the workbench, the top ends of the containers are open, a set of connecting pipes communicated with the interiors of the containers are arranged on the side walls of the containers, and sealing mechanisms for sealing ports of the containers are arranged at the top ends of the containers. The feeding and discharging mechanism comprises a shell, the bottom end of the shell is provided with an opening, and the bottom face of the shell is provided with a closing assembly for closing an end opening of the shell. The core packages are placed in the shell, then the sealing plate is used for blocking the core packages in the shell, and then the shell is placed in the container, so that all the core packages are placed in the container along with the shell at the same time, the feeding work of the core packages is completed, and after the core packages are subjected to impregnation processing, the discharging work can be completed only by taking the shell out of the container. Therefore, the processing efficiency of the core package is greatly improved.

The utility model provides a kind of encapsulation anti-leakage tool, belong to capacitor core ware glue injection equipment field, container, the container has the holding cavity, holding cavity is set on the container, and capacitor core is placed in holding cavity;Blocking end cover, blocking end cover end has plane structure, container one end is placed on blocking end cover plane structure, blocking end cover end has blocking piece, and blocking piece is used to prevent container from being inclined.Blocking end cover has through-hole, when container is placed on blocking end cover, through-hole is communicated with holding cavity, and the inner surface of through-hole is in contact with the outer surface of capacitor core lead, the utility model is applicable to the capacitor core lead of capacitor core located at both ends is sealed and filled with glue, by placing container one end on blocking end cover, capacitor core is placed in holding cavity, glue is injected into holding cavity from the other end of container, and blocking end cover can block potting adhesive injected into container, to avoid the leakage of injected potting adhesive.

To provide electronic component in which bonding strength between external electrode and plating layer and bonding strength between external electrode and internal conductor can be increased. Electronic component according to present disclosure includes element body, interlayer connection conductor provided inside element body so as to extend to main surface of element body, external electrode formed on main surface of element body so as to cover interlayer connection conductor, and plating layer covering external electrode. Plating layer includes impregnation part that is impregnated into interlayer connection conductor.

To provide a method and an apparatus for manufacturing an electronic component which can be miniaturized.SOLUTION: A method for manufacturing an electronic component including an element body 110 having a first end surface 115 and a second end surface 116 opposite to each other in a length direction, and an external electrode provided on each of the first end surface and the second end surface, the method including a step of immersing the element body in a first conductive paste layer 51, which is a precursor of the external electrode, from the first end surface side; The method includes a step of moving the element body part relative to the first conductive paste layer in the in-plane direction of the first end face, a step of pulling up the element body part from the first conductive paste layer while or after the element body part is moved relative to the first conductive paste layer in the in-plane direction of the first end face, and a step of immersing the element body part in a second conductive paste layer, which is a precursor of the external electrode, from the first end face side after the element body part is pulled up from the first conductive paste layer.SELECTED DRAWING: Figure 9

The invention relates to a chip solid capacitor and a coating process thereof, the chip solid tantalum capacitor is composed of a tantalum block, a dielectric oxide layer, a cathode layer, a transition layer, a silver layer and a plastic package layer, the cathode layer is a manganese dioxide layer, and the manganese dioxide layer is formed by thermal decomposition on the tantalum block on which the dielectric oxide layer grows through the coating process; the specific operation of the coating process is specifically limited, and the tantalum block is sequentially impregnated with thin-thick-thick-thin coating liquid, so that the prepared cathode layer is high in density, high in interlayer binding force and free of bubbling and delamination defects, the qualification rate and the moisture resistance of the product are greatly improved, meanwhile, parameters of all stages are controllable and adjustable, and the production cost is reduced. And the production requirements of high-specific-volume tantalum capacitors with different specific volume grades can be met, and the method has a good industrial application prospect.

The invention provides automatic vacuum impregnation treatment equipment, and relates to the technical field of electronic component processing, the automatic vacuum impregnation treatment equipment comprises a box body, a vacuum pumping / breaking group and an impregnation solution adding group, a solution tray is arranged at the upper part in the box body, a material frame is arranged in the box body at the position above the solution tray, the material frame is used for placing a product, and the impregnation solution adding group is used for adding an impregnation solution into the box body. The material frame is driven by a lifting driving piece to ascend and descend and used for placing products into the solution tray, and a cover plate door is hinged to the upper portion of the box body. Products on a material frame are put into a solution tray through a lifting driving piece of a box body, and through automatic negative pressure control of a vacuumizing / vacuum breaking set and automatic liquid supply and recovery of an impregnation solution adding set, automation of the whole process from automatic feeding and vacuum impregnation to automatic vacuum breaking and discharging is completed, manual intervention is not needed, and the manual labor input is greatly reduced; and meanwhile, bad products caused by manual operation differences are avoided, and the stability and the product percent of pass of the production process are improved.

The utility model relates to a capacitive oven. The capacitive oven comprises a frame body, a self-locking mechanism, a circulating assembly, a limiting mechanism and a shifting assembly. The rack body comprises a first mounting position and a second mounting position, and the first mounting position and the second mounting position are both used for mounting baking trays; the self-locking mechanism is arranged on the frame body and used for limiting the position of the baking tray when the baking tray is located at the first mounting position, and the limiting mechanism is arranged on the frame body and used for limiting the position of the baking tray when the baking tray is located at the second mounting position; the circulating assembly is arranged on the frame body, the circulating assembly and the shifting assembly are arranged at intervals of the frame body, and the circulating assembly is used for driving the baking trays to enter the first mounting positions or driving the baking trays to be taken out from the second mounting positions. According to the capacitance oven, the efficiency of the oven when the capacitance baking tray is loaded and taken can be improved.

The utility model relates to the field of capacitor processing devices, and discloses a mica capacitor dipping processing device which comprises a machine shell, the top of the machine shell is rotatably connected with a sealing cover, the inner wall of the machine shell is fixedly connected with a heating plate, the inner wall of the heating plate is fixedly connected with an inner container, and the middle ends of the left side and the right side of the inner wall of the inner container are provided with first sliding grooves. A through groove is formed in the top end of the inner wall of the first sliding groove, a sliding block is detachably connected to the interior of the first sliding groove, a side plate is connected to the through groove through the sliding block, the top end and the bottom end of the close side of the side plate are each fixedly connected with two connecting rods, and a lifting rod is fixedly connected to the middle of the close side of the connecting rod at the top end. According to the utility model, the operation convenience and safety are improved, and a worker does not need to stretch hands into the device to take the impregnated capacitor; and the capacitor is cooperatively and stably clamped by the fixed clamping plate, so that the lead-out sheet is prevented from bending, uniform and stable impregnation is ensured, and the product quality is improved.

The utility model discloses a capacitor oil injection subassembly structure can guarantee after being filled with insulating oil in capacitor inside, can utilize oil suction machine and take away most of the redundant insulating oil reasonably, thereby can reduce waste, can also avoid the condition that a large amount of insulating oil appears and overflows in capacitor shell top. The main structure of the application includes the oil injection hole of being located on capacitor shell and the oil injection pipe spare of being located on the oil injection hole, the oil injection hole is located on the top board of capacitor shell, and the oil injection pipe spare includes the oil inlet pipe of sealed connection between the oil injection hole, and the oil inlet pipe upper end is the oil inlet end for with the butt joint of external oil supply hose, and the oil inlet pipe lower end communicates with capacitor shell inside, the oil injection pipe spare still includes the oil suction pipe, and the oil suction pipe is arranged obliquely, and the oil suction pipe upper end is the oil suction end for with the butt joint of external oil suction hose, and the oil suction pipe lower end is connected with the side mouth of the butt joint and intercommunication, and the oil suction pipe is equipped with the on-off valve.

The utility model discloses a kind of based on capacitor processing's impregnation tool, it is related to capacitor processing technical field, including impregnation mechanism, the left side of the impregnation mechanism is provided with suction mechanism, the top of the impregnation mechanism is provided with working mechanism, the impregnation mechanism includes impregnation box, the inside of the impregnation box is provided with inner chamber, the bottom of the impregnation box is fixedly connected with support leg around, the top of the impregnation box is fixedly connected with connecting support, the top of the connecting support is fixedly connected with operating box, the front of the operating box is provided with operating panel. The utility model is through the design of suction mechanism, when capacitor is impregnated, start vacuum machine first to extract vacuum inside impregnation box, so that capacitor is in negative pressure state, then pressurize, so that impregnation solution fully impregnates capacitor, greatly improves impregnation effect, so that impregnation time is greatly shortened, improve product quality, and improve the performance of capacitor.

The invention relates to a drying and impregnation integrated device and process for a capacitor element. The drying and impregnation integrated device comprises a closed case formed by a top plate, side plates and a bottom plate in a surrounding mode. The device is characterized in that a process chamber is formed in the case; the at least one drying device is arranged in the process chamber and is used for drying the capacitor elements; the at least one impregnation device is arranged in the process chamber and is used for impregnating the capacitor elements dried by the drying device; the dehumidification mechanism is used for adjusting and maintaining the air humidity in the process chamber within a preset drying range; the material transfer mechanism is arranged in the process chamber and is used for transferring the dried capacitor elements from the drying device to the impregnation device; and the drying and impregnation processes of the capacitor element are both carried out in the process chamber in a preset low-dew-point drying atmosphere. The capacitor is used for solving the problem of secondary moisture absorption caused by exposure of an element in the atmosphere after drying and before impregnation, and the quality of the capacitor is effectively improved.

The invention provides a low-inductance pulse capacitor and a manufacturing method thereof, and the pulse capacitor comprises a plurality of capacitor core groups which are sequentially arranged in a first direction and are connected in series, and each capacitor core group comprises a plurality of capacitor cores which are sequentially arranged in a second direction and are connected in parallel. And the adjacent capacitor core groups are sequentially connected through the metal connecting sheets to form a snake-shaped series structure. According to the pulse capacitor, parasitic inductance can be reduced, and the problems that the voltage climb rate is insufficient and the peak current is small in a high-voltage and large-current working state are solved.

The invention discloses an impregnation cylinder with a clamping device. The impregnation cylinder comprises a cylinder body, a cylinder cover, a first driving assembly and the clamping device, the clamping device is arranged in the liquid immersion cavity and located at the bottom of the liquid immersion cavity, and the clamping device is used for clamping the capacitor subjected to liquid immersion processing, so that in the liquid immersion process, displacement or toppling of the capacitor in the liquid immersion process is prevented through fixation of the clamping device, the liquid immersion process is more stable, and the liquid immersion efficiency is improved. Therefore, the stability of the immersion processing process is ensured, and the capacitor after immersion can be smoothly taken out by the material taking device after immersion is finished, so that the overall immersion processing stability is ensured.

One object is to improve the insulation reliability of capacitors having dielectric layers containing rare earth elements. An aspect of the present disclosure provides a capacitor including a body, a first external electrode provided on the body, and a second external electrode provided on the body. The body has a first internal electrode layer, a second internal electrode layer, and a dielectric layer disposed between the first internal electrode layer and the second internal electrode layer. The dielectric layer contains crystal grains of barium titanate. The crystal grains each include a core portion and a shell portion covering the core portion. The concentration of Ho in the shell portion is from 0.5 at % to 5 at %. The concentration of Ni and the concentration of Fe in the shell portion are from 0.3 at % to 3 at %.

The utility model belongs to the technical field of metallized polypropylene film production, and particularly relates to a metallized film heat setting device which comprises a drying oven, a plurality of driven rollers which are rotationally connected are transversely arranged in a working bin of the drying oven, and the driven rollers are arranged at intervals in the depth direction of the working bin of the drying oven. A transversely-arranged driving roller is further rotationally connected between the driven rollers arranged at intervals, and a driving mechanism arranged on the drying oven can drive the driving roller to rotate in the same direction. According to the utility model, the driving mechanism arranged on the drying oven drives the driving roller arranged between the driven rollers to rotate, so that when a capacitor core body formed by winding a metalized polypropylene film is erected between the driven rollers and the driving roller, the capacitor core body can be subjected to heat setting while rotating through the rotation of the driving roller; therefore, the heating uniformity of the capacitor core can be effectively improved, and the production quality of the capacitor core can be improved.

The application discloses a preparation method of a UV photocuring, solvent-free type nickel inner electrode paste, and specifically comprises the following steps: step 1, preparing acrylic modified cellulose microfibril; step 2, synthesizing a UV photocuring resin; step 3, synthesizing a nickel complex; step 4, preparing a nickel inner electrode paste according to the products obtained in steps 1-3; and step 5, preparing a ceramic paste according to the product obtained in step 4. The application further discloses the UV photocuring, solvent-free type nickel inner electrode paste and application thereof in multilayer ceramic capacitors. The electrode paste prepared by the application does not need to remove solvent by heating, avoids the problem of uneven solvent drying, and improves the yield and performance of devices.

The invention relates to the technical field of coating machines, and particularly discloses a sintered foil slurry coating and drying all-in-one machine for an aluminum electrolytic capacitor, which comprises an equipment base, the top of the equipment base is fixedly connected with a fixing frame, and the side surface of the fixing frame is rotatably connected with a feeding roller; the part, located on one side of the feeding roller, of the side face of the fixing frame is rotationally connected with a material collecting roller, the top of the fixing frame is fixedly connected with a stirring barrel, the side face of the heating assembly is fixedly connected with a fixing ring, the side face of the stirring outer pipe is rotationally connected with the side face of the fixing ring, and the bottom of the heating assembly is rotationally connected with the top of the fixing frame. And the stirring blades rotate, a power source of the heating assembly is switched on, the heating assembly heats the interior of the stirring outer pipe, and the aims of continuous coating and drying are achieved through the sintered foil slurry coating and drying all-in-one machine for the aluminum electrolytic capacitor.

The utility model discloses a feeding mechanism of a capacitor impregnation machine. The feeding mechanism comprises a first station feeding mechanism and a second station feeding mechanism, wherein the first station feeding mechanism and the second station feeding mechanism enable impregnation trays to alternately enter and exit a vacuum impregnation machine main body. When the vacuum impregnation machine carries out impregnation work, the first station feeding mechanism can carry out pre-feeding operation, after an impregnation tray is placed in the first station feeding box, the interior of the first station feeding box is vacuumized through work of the first negative pressure assembly till the value tends to be consistent with the value in an impregnation cavity, and then the impregnation tray is placed in the first station feeding box. After the impregnation work of the vacuum impregnation machine is completed, the impregnated trays are taken out through the second station feeding mechanism, then the to-be-impregnated trays in the first station feeding box are fed into the impregnation net plate through the first feeding assembly to be subjected to impregnation operation, and the operation is repeated in sequence, so that the labor intensity can be reduced, and the impregnation efficiency can be improved.

This method for producing an electrolytic capacitor comprises a first connection step, a second connection step, a first insertion step, an accommodation step, and a sealing step. In the first connection step, a foil-shaped first internal lead is connected to a first electrode foil. In the second connection step, after the first connection step, a rod-shaped first external lead is connected to the first internal lead, and a first electrode is obtained. In the first insertion step, after the second connection step, the first external lead is inserted into an insertion opening in a sealing plate. In the accommodation step, after the first insertion step, the first electrode is accommodated in a container. In the sealing step, after the accommodation step, the opening of the container is closed using the sealing plate.

To provide a method of manufacturing an electrolytic capacitor which improves conductivity and equivalent series resistance (ESR) of a porous part by coating a large part of a dielectric layer of an anode foil of the electrolytic capacitor with a conductive polymer, and to provide the electrolytic capacitor.SOLUTION: A method of manufacturing an electrolytic capacitor according to the present invention includes the steps of: preparing a fiber structural body; applying a conductive polymer-containing liquid containing a conductive polymer to the fiber structural body; and removing at least a part of the conductive polymer-containing liquid from the fiber structural body after the conductive polymer-containing liquid is applied to the fiber structural body, wherein an electric conductivity of the electrolytic solution at 30 °C. is 3. 0mS / cm or more.SELECTED DRAWING: Figure 1