Calibration system for metrology systems

Abstract

Calibration system for a weighing system, the weighing system comprising a first weighing load cell and a first container configured to hold a first substance to be weighed by the first weighing load cell, the calibration system comprising a first calibration device comprising a first force acting part configured to apply a first calibration force in the direction of gravity and a first calibration load cell configured to measure the first calibration force, a base part configured to apply a first reaction force in the direction opposite to the first calibration force applied via the first calibration device, and a removable force-applying part connected to the first calibration device and having a force-applying surface, the force-applying part being configured to be aligned with at least a portion of the weighing system for applying a first calibration force to the first container via the first force-applying surface and for transmitting the first calibration force to the first weighing load cell.

Description

Technical Field

[0001] A calibration system for a metering system, the metering system comprising a first metering load cell and a first container configured to hold a first substance to be metered by the first metering load cell.

Background Art

[0002] Tanks or large containers are often used in manufacturing facilities such as in the pharmaceutical and food industries to store raw materials or mixtures of ingredients for product production, and the products may be mixtures of two or more ingredients. These storage or mixing containers are often provided with a metering system so that the user of the container can know how much product is present in the container, or so that the user can extract a certain amount of product or an applied amount from the tank, and the metering system can provide an indication of the amount and / or mass of the extracted product.

[0003] The metering system is often in the form of one or more load cells, which can provide an indication of the force applied through the tank to the load cell, and this indication can be used to add or extract units indicating the weight or mass of the tank and / or the contents of the tank. The metering system needs to be calibrated regularly to ensure that the metering system reproduces a correct indication of the mass present in the container.

[0004] There are several ways in which such calibration can be performed. One way to calibrate a tank system may be when the tank is emptied and a predetermined amount of purified liquid, such as purified water, is used to fill the tank from empty to full. During filling, the amount of liquid added to the container is monitored by a flow meter, and thus the curve of the metering system from the empty to full state of the tank can be traced, and this data can be used to verify that the metering system is working correctly, or to calibrate the metering system against the result of filling the tank to ensure that future measurements will be correct. This calibration technique is extremely time-consuming and expensive because the container must be emptied and cleaned before calibration, and also cleaned after calibration to prepare the container for the components that the tank will receive. Furthermore, when this calibration method is used, the liquid used for calibration must be discarded because the liquid is no longer clean. Therefore, this calibration technique can be considered extremely time-consuming, uneconomical, and costly, as the purified liquid can cost nearly 1 euro per liter, and each container can hold more than 40,000 liters. Thus, the cost of the liquid can be a very important factor during calibration. Furthermore, a time-consuming calibration method using liquid means that the containers cannot be used for production, which limits production capacity.

[0005] Another method for calibrating a metering system may involve mounting a tension load cell and a hydraulic piston in series with the tank, with the opposite end attached to the foundation. By applying hydraulic pressure to pull the tank towards the foundation, the tension load cell will indicate the amount of force applied to the tank, and the output of the metering system can be compared to the force applied by the hydraulic piston. However, this type of calibration system can be considered extremely bulky due to the size of the hydraulic piston and load cell, which makes it difficult to incorporate this type of system into existing containers, especially when the containers are placed close to each other in the manufacturing facility or when there are numerous process pipes or connections around the containers.

[0006] Conventional systems for calibrating tanks can be found, for example, in WO2004 / 088259 and WO2020 / 057034. Both of these systems include a hydraulic device, which is in the form of a tensile hydraulic cylinder, with the cylinder housing mounted on a base, and the hydraulic device is adapted to apply force directly to the load cell via either tension or compression. Tanks or vessels are often designed to accommodate the calibration device, and the tank or vessel may have a mounting portion welded to the tank, to which the calibration device is connected so as to be able to apply force to the metering system. Thus, these systems may have permanent fixtures that enable the calibration of the load cell or metering system. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] WO2004 / 088259 [Patent Document 2] WO2020 / 057034 [Overview of the project] [Problems that the invention aims to solve]

[0008] Therefore, there is a need to provide a calibration system that can be used with any type of metrology system without requiring any modification or adaptation of any part of the metrology system to the calibration system. [Means for solving the problem]

[0009] The present invention provides a calibration system for a weighing system, the weighing system comprising: a first weighing load cell and a first container configured to hold a first substance to be weighed by the first weighing load cell; a first calibration device comprising: a first force acting part configured to apply a first calibration force in the direction of gravity and a first calibration load cell configured to measure the first calibration force; a base part configured to apply a first reaction force in the direction opposite to the first calibration force applied via the first calibration device; and a removable force application part connected to the first calibration device and having a force application surface, the force application part being configured to be aligned with at least a portion of the weighing system for applying a first calibration force to the first container via the first force application surface and for transmitting the first calibration force to the first weighing load cell.

[0010] The loading surface may be one or more surface areas that are in direct or indirect contact with the weighing system or the container or tank of the weighing system. Thus, the first loading surface may be in contact with the weighing system in one or more areas, such that the first loading surface may be divided into multiple areas configured to transmit a first calibration force to the weighing system and / or the container of the weighing system.

[0011] By having a removable force-applying component, it may be possible to introduce the calibration system into the weighing system without requiring any permanent modification of the actual weighing system other than applying or installing the calibration system into the weighing system. The force-applying component may be introduced into the weighing system at a position where a first calibration force is applied to the load cell or weighing device of the weighing system and the calibration load cell registers the magnitude of the first calibration force applied to the weighing system. The calibration load cell may be understood as a reference load cell, which provides a reference for the magnitude of the force applied through the calibration system, and this can be used to compare with the magnitude of the force registered by the load cell of the weighing system.

[0012] Production sites for chemical companies rely heavily on weighing systems when a certain amount of chemical is required for a mixture, and especially within the pharmaceutical industry, it can be extremely important to dispense the exact weight of a specific chemical into a mixture. A production site may have tens, hundreds, or thousands of identical or different tanks holding different chemicals, and each tank or container has its own weighing system, each weighing system must be regularly calibrated to ensure and verify that the weight of the substance is correct each time. Since the exact amount or weight of a substance can have a significant impact on the effectiveness, reliability, and / or legality of the amount of substance dispensed and / or the weight of the substance used in the mixture, any discrepancy can lead to fatal consequences. This can be particularly important for the accurate administration of pharmaceuticals, chemical products, or substances.

[0013] By providing a calibration system with a removable force-bearing component, it may be possible to calibrate each tank in a production line without the need to structurally alter the tank or container for the calibration process. The removable force-bearing component can be positioned in a suitable location on the tank and / or container, and the force can be applied directly to an existing part of the tank / container to transmit the calibration force to the tank / container's weighing system, thus eliminating the need to weld brackets, coupling eyes, or any other type of mounting element to the tank.

[0014] The removable load-bearing portion may be connected to a force calibration device, which may be connected to a base. Therefore, when a calibration force is applied to the tank and / or container by the calibration device, the base provides a reaction force in the opposite direction to the calibration force, allowing the force to be transmitted through the container to the weighing load cell of the weighing system. Once calibration is complete, the removable load-bearing portion may be detached from the container or weighing system, and the weighing system will be completely as it was before the weighing load cell calibration.

[0015] Therefore, the calibration system may be applied to a second weighing system and / or container, and the calibration process may be repeated for the second weighing system and / or subsequent weighing systems.

[0016] In the context of this application, the term “container” as used in relation to a weighing system may be a container, receptacle, tank, hopper, or any type of device capable of holding a substance and, optionally, dispensing a substance from the device.

[0017] In the context of this application, the term “base” may be understood as any part that can provide a reaction force to the load-bearing portion. The base may be a foundation, a floor, a frame of a movable container, or a separate device that mechanically connects a calibration device to the weighing system to provide a reaction force to the load-bearing portion.

[0018] The removable force-applying portion may take the form of a removable clamp or removable hook that can be applied directly or indirectly to the tank, providing a mechanical connection between an existing part of the container and the calibration device, allowing the calibration portion to apply a calibration force to the container.

[0019] A removable load-bearing portion may be connected to a first calibration device via a force-transmission portion, which may be a metal rod, chain, or strap, with a first end of the force-transmission portion connected to a force-actuating portion or a first calibration load cell, enabling a mechanical connection between the first calibration device and the removable load-bearing portion.

[0020] Furthermore, the removable load-bearing portion may include a force-transmission portion and may be directly connected to a calibration portion, i.e., a force-actuating portion or a calibration load cell. The removable load-bearing portion may be in the form of a removable strap, chain, or wire applied directly to the tank, the strap, chain, or wire having a load-bearing surface for transmitting force to the container.

[0021] The calibration device is configured to apply tension between the load-applying part and the base, allowing the tension to be transmitted to the weighing system as a compressive force. Thus, the load-applying part pushes the weighing device, transmitting the force to the load cell of the weighing device via the container.

[0022] In one exemplary embodiment of the present disclosure, the calibration system may comprise a second calibration device. The second calibration device may be used to impart a second calibration force to the calibration of the weighing system. The second calibration device may comprise a second calibration load cell and a second force actuation part. Thus, the calibration force may be increased by introducing the second calibration device. The calibration system may comprise three or more calibration devices, or a plurality of calibration devices. Any one of the second, third, and fourth calibration devices may have the same technical characteristics as the first calibration device.

[0023] The removable biasing portion can be one or more elements configured to apply a first calibration force to the first container.

[0024] The removable biasing portion can be configured to be connected to an upper portion of the first container of the metering system.

[0025] The removable biasing portion can be in the form of a clamp configured to be clamped to an existing portion of the first container of the metering system. Thus, the clamp can be configured to be clamped, for example, at the outlet of the container. In that way, the existing portion of the container can be utilized to attach the removable biasing portion of the calibration system without the need to permanently modify the container of the metering system.

[0026] In one exemplary embodiment, the biasing of the first calibration device and the second calibration device can be synchronized such that the first calibration force and the second calibration force are applied simultaneously.

[0027] In one exemplary embodiment of the present disclosure, the second calibration device can be connected to the removable biasing portion. By connecting the second calibration device to the removable biasing portion, the first calibration device and the second calibration device can apply an increased force to the removable biasing portion, thereby increasing the force that the removable biasing portion can apply to the metering system. The first calibration device and the second calibration device can be configured to apply a tension force to the biasing portion in a direction towards the base, and that force can be transmitted to the metering device. The first calibration device and the second calibration device can be configured to apply a tension force, and a first biasing axis of the first calibration device can be substantially parallel to a second biasing axis of the second calibration device. The calibration force can have a third biasing axis that is parallel to the first biasing axis and the second biasing axis. The third biasing axis of the biasing device can be substantially perpendicular (in the direction of gravity), the second biasing axis of the second calibration device can be substantially perpendicular, and / or the first biasing axis of the first calibration device can be substantially perpendicular.

[0028] In one exemplary embodiment of the present disclosure, a first calibration device may provide a first portion of a first calibration force applied through a first loading surface, and a second calibration device may provide a second portion of the first calibration force through the first loading surface. Thus, the first and second calibration devices are configured to provide at least a portion of the first calibration force to the weighing system. In one example where the calibration system comprises a first calibration device and a second calibration device, since both calibration devices apply force through the same loading surface, the forces applied through each of the calibration devices can be aggregated to form a first calibration force.

[0029] In one exemplary embodiment of the present disclosure, a first calibration device may be connected to a loading portion on one side of the loading surface, and a second calibration portion may be connected to a loading portion on the opposite side of the loading surface. Thus, the first and second calibration devices may be mechanically coupled to the loading portion, and the first calibration force and the second loading force may be applied on each side of the loading surface. This allows the force vectors on the loading surface to be substantially parallel to the force vectors of the first and second calibration forces when the first and second calibration forces are substantially equal to each other.

[0030] In one embodiment of the present disclosure, a first loading axis and / or a second loading axis may be located on either side of the loading axis of the weighing device. The first loading axis, the second loading axis and the loading axis of the weighing device may be parallel to each other and may extend substantially such that each loading axis intersects a straight line extending perpendicular to each of the loading axes.

[0031] The loading portion may have a loading surface positioned substantially equidistantly from the connection of the first calibration device and the connection of the second calibration device, so that when a calibration force is applied through the first and second calibration devices, the loading portion will have an equal force applied through those calibration devices, resulting in an even application of the calibration force to the weighing device, and the levers on both sides of the loading portion will be of equal length from the loading surface, thereby ensuring a uniform application of the calibration force to the weighing device.

[0032] In one exemplary embodiment of the present disclosure, the load-bearing portion may be a rigid elongated member having a length longer than the diameter and / or width of the weighing system. This allows the load-bearing portion to extend outward from the weighing system, and thus the first and / or second ends of the elongated member may be configured to extend vertically away from the weighing system. Thus, one or more calibration devices may be positioned laterally to the weighing device and extend from the base to the load-bearing portion, and one or more calibration devices may be positioned outside the outermost periphery of the weighing device.

[0033] In one exemplary embodiment of the present disclosure, the first calibration force may be configured to be applied in a direction away from the loading surface. Thus, the first calibration force may extend in a direction away from the loading surface, and at least 90% of the calibration force applied to the weighing device is in a direction parallel to or coaxial with the loading axis of the weighing device. The first calibration force applied via the loading surface may be directed in the direction of gravity, and the loading portion and / or loading surface is located on the opposite side of the weighing device and configured to impart a compressive force to the weighing device. The first calibration device may impart a tensile force to the loading portion, and the loading portion may impart a compressive force to the weighing device. Thus, the calibration device may impart tension between the base and the loading portion, and the loading portion may impart a compressive force between the loading portion and the base.

[0034] In one exemplary embodiment of the present disclosure, the base portion is a removable base portion having a second loading surface positioned opposite a first loading surface. Thus, the first and second loading portions may be positioned vertically on opposite sides of the weighing device, and the first and second loading portions are pulled toward each other, thereby applying a compressive force to the weighing system and / or the load cell of the weighing system.

[0035] The calibration system may be configured to emulate gravity applied through the substance added to the container and / or tank of the weighing system.

[0036] The first calibration device may have a first force actuation part that is hydraulic, and therefore the actuation device is a hydraulic device configured to apply a first calibration force. The hydraulic device may be connected to a hydraulic pump, which may be connected to two or more hydraulic devices and apply equal hydraulic pressure to two or more hydraulic devices. Therefore, when there are two or more hydraulic devices, each device may provide an equal calibration force. As an example, if the first calibration device provides a calibration force of 1 kN, the second calibration device may also provide a calibration force of 1 kN.

[0037] The disclosure also relates to a calibration assembly comprising a calibration system and a weighing system according to the disclosure, wherein the weighing system comprises a first weighing load cell and a first container configured to hold a first substance to be weighed by the first weighing load cell.

[0038] The following is a description of an exemplary embodiment relating to the drawings. [Brief explanation of the drawing]

[0039] [Figure 1] This is a schematic front view of one embodiment of the calibration system according to the present disclosure. [Figure 2] This is a schematic front view of a second embodiment of the calibration system according to the present disclosure. [Figure 3]This is a schematic front view of one embodiment of the calibration system according to the present disclosure. [Modes for carrying out the invention]

[0040] Various exemplary embodiments and details are described below, with reference to the figures where relevant. Note that the figures may or may not be drawn to a certain scale, and that elements of similar structure or function are represented by the same reference numerals throughout the figures. Also note that the figures are for the sole purpose of facilitating the description of the embodiments. They are not intended to be an exhaustive description of the disclosure or a limitation on the scope of the disclosure. Furthermore, the embodiments shown are not necessarily required to have all the aspects or advantages shown. Aspects or advantages described in relation to a particular embodiment are not necessarily limited to that embodiment and may be practiced in any other embodiment, even if not shown or explicitly described as such.

[0041] The use of terms such as “first,” “second,” “third,” and “fourth,” “primary,” “secondary,” and “tertiary” does not imply any particular order; these terms are included to identify individual elements. Furthermore, the use of terms such as “first,” “second,” “third,” and “fourth,” “primary,” “secondary,” and “tertiary” does not indicate order or importance; rather, the use of terms such as “first,” “second,” “third,” and “fourth,” “primary,” “secondary,” and “tertiary” is used to distinguish one element from another. Note that the words “first,” “second,” “third,” and “fourth,” “primary,” “secondary,” and “tertiary” are used here and elsewhere solely for labeling purposes and do not indicate any particular spatial or temporal order.

[0042] Furthermore, the labeling of the first element does not imply the existence of the second element, and vice versa.

[0043] Figure 1 is a schematic front view of a calibration system 1 to be used to calibrate a weighing system 3 according to the present disclosure. The weighing system 3 comprises a container 5 for holding a substance 7, the container 5 having an upper portion 9 and a lower portion 11, the lower portion 11 comprising support legs 13 that can secure the container 5 to a base 15 (or foundation). The weighing system 3 may comprise one or more weighing devices 17, such as a load cell 17, capable of registering the weight of the substance 7 in the container 5. The load cell 17 is positioned between the container 5 and the base 15, and changes in the weight of the substance 7 in the container 5 can be registered and monitored by the load cell 17. The load cell 17 may be connected to a monitoring device (not shown) that enables a user to register and monitor the current weight of the substance 7 and to monitor and register changes in the weight of the substance 7 in the container 5.

[0044] However, weighing systems must be calibrated at regular intervals to ensure that the weighing system is accurate and that users can rely on the load cell readings at any given time. Such calibrations can be extremely time-consuming and costly, as some calibration methods require the container to be emptied, cleaned, and filled with known substances so that the load cell of the weighing system can be accurately calibrated. Other calibration systems require the container to be modified by attaching a calibration device to the tank and providing one or more mounting elements on the container to impart a calibration force between the tank and the base. In existing environments, this can be extremely costly, as each tank must be emptied before modification, and the mounting elements must be welded to the tank or at least securely attached to it to withstand the calibration force applied through the calibration device.

[0045] However, in this disclosure, the solution does not require any modification to the tank, and the system can be mounted on any tank without the need to empty or modify the tank. Calibration system 1 according to this disclosure may comprise one or more calibration devices 19, the first end 20 of each calibration device 19 being connected to a base 15 via a first mounting portion 21, and the second end 23 of each calibration device 19 being connected to a load-bearing portion 25 via a second mounting portion 27. Calibration device 19 may comprise a first force-actuating portion 29 configured to provide a first calibration force A, the calibration device 19 providing tension between the load-bearing portion 25 and the base 15. The first calibration force A may be registered by a load cell 31 positioned with the calibration device 19, the load cell 31 registering the magnitude of the force applied through the calibration device 19 between the base 15 and the load-bearing portion 25. Therefore, the base 15 provides a reaction force to the force applied to the load-applying part 25, and the base 15 can be considered a static part, while the load-applying part 25 can be considered a dynamic part.

[0046] In the embodiment shown in Figure 1, the loading portion 25 may be a removable loading portion 25, which is in the form of an elongated member 37 having a first end 33 and a second end 35, and extending horizontally B beyond the outer circumference 39 of the container 5, so that each end 33, 35 extends horizontally B beyond the outer circumference 39 of the container 5. The loading portion 25 may have a first loading surface 41 aligned with the container 5 along the top surface 43 of the container 5 in order to transmit a first calibration force A through the container 5 to the weighing system 3. Thus, the first calibration force A is registered by the load cell 17 of the weighing system 3 as an increase in the weight of the container 5 without changing the weight of the substance 7 in the container 5.

[0047] In this embodiment, the calibration system 1 comprises a first calibration device 19 and a second calibration device 19' which may be equivalent to each other, and each of the calibration devices 19 and 19' is connected to each end, i.e., the first end 33 and the second end 35 of the elongated member 37 (force-applying portion), and the force-applying surface 41 is located in the area between the ends 33 and 35 of the elongated member 37.

[0048] Therefore, when calibration is to be performed on the weighing system 3, the first calibration device 19 and the second calibration device 19' can be mounted on the base 15, the removable load-bearing part 25 can be positioned on the upper surface 43 of the container 5, and the calibration devices 19, 19' can be connected to the load-bearing part 25. Subsequently, all slack is removed from the calibration devices 19, 19' between the base 15 and the load-bearing part 25. Then, the load cell 17 of the weighing system 3 is zeroed, the load cell 31 of the calibration devices 19, 19' is zeroed, and the hydraulic pump 45 can apply hydraulic pressure to the force-actuating part 29 via the hydraulic line 46, thereby giving tension A between the removable load-bearing part 25 and the base 15. Tension A is transmitted to the container 5 via the load-bearing surface 41 and the upper surface 43 of the tank, and tension A is registered as a compressive force C in the load cell 17 of the weighing system 3. By providing such a calibration system 1, a first force registered by the load cell 31 of the first calibration device 19 and a second force registered by the load cell 31 of the second calibration device 19' can be registered as a tank calibration force, which is registered in a 1:1 ratio by the load cell 17 of the weighing system 3. Thus, if a force of 1 kN is applied through the calibration devices 19, 19', the load cell 17 of the weighing system 3 will register an increased force of 1 kN, and if the load cell 17 does not, it must be calibrated to show the correct force in the register. Thus, the calibration system 1 can apply a calibration force to the weighing system 3 on a 1:1 scale for calibration purposes.

[0049] It should be understood that the tanks or containers 5 are of different sizes and shapes, and the first loading surface 41 can be adjusted to suit each specific tank in order to allow the calibration force A to be applied to the container 5 of the weighing system 3.

[0050] Figure 2 shows a calibration system 1 and weighing system 49 similar to those shown in Figure 1, except that the weighing system 3 is on a wheel 47 and may be considered a movable weighing system 49. The weighing system 49 comprises a container 5 configured to hold a substance 7, as well as support legs 13 and a load cell 17. However, this weighing system 49 comprises a chassis 51 positioned between the wheel 47 and the support legs 13, and the chassis 51 may be a rigid frame supporting the entire weight of the weighing system 49 above the chassis 51.

[0051] The wheels 47 of the weighing system 49 may be made of an elastomer material, which facilitates moving the weighing system 49 from one position to another. However, since the elastomer material of the wheels 47 that connect the weighing system 49 to the ground can absorb force, the calibration system 1 may further include a second load-bearing portion 53 which may have a second load-bearing surface 55, the second load-bearing portion 53 may be aligned with the lower surface 57 of the chassis 51, and the second load-bearing portion 53 may act as a base 15' that provides a reaction force for the calibration devices 19, 19' via a first mounting portion 65 attached to the second load-bearing portion 53. The second load-bearing portion 53 may be in the form of an elongated member 59 that extends horizontally B beyond the outer circumference 39 of the container 5, so that each end 61, 63 extends horizontally B beyond the outer circumference 39 of the container 5. The second loading portion 53 may have a first loading surface 41 aligned with the chassis 51 along the lower surface 57 of the chassis 51 in order to transmit the first calibration force A to the weighing system 49 via the container chassis 51. Thus, the first calibration force A can be registered by the load cell 17 of the weighing system 3 as an increase in the weight of the container 5 without changing the weight of the substance 7 in the container 5.

[0052] Therefore, calibration can be performed as shown in the embodiment in Figure 1, with the load-bearing section 25 and the second load-bearing section 53 transmitting calibration force to the weighing system 49, and the chassis 51 and the second load-bearing section 53 providing reaction force to the load-bearing section 25 and the container 5.

[0053] It should be understood that the weighing system 49 may be calibrated using the calibration system 1 shown in Figure 1, and the chassis 51 may be raised from the base 15 by providing a rigid block or rise to the chassis 51, thereby ensuring that the calibration force is not transmitted to the elastic part of the wheel 47.

[0054] Figure 3 shows one embodiment of the present disclosure in which the movable weighing system 49 shown in Figure 2 can be introduced into an embodiment of the calibration system 1 shown in Figure 1. Thus, the movable weighing system 49 may be introduced between a first mounting portion 21 attached to a site foundation, base or floor, and the load portion 25 is connected to the base 15 via a first calibration device 19 and a second calibration device 19'. Thus, when a first calibration force A is applied to the load portion 25, the load portion 25 compresses the weighing system 49 between the load portion 25 and the base 15 (floor). Thus, when the wheel 47 is compressed until it is fully compressed, the first calibration force A will be registered by the load cell 17 of the weighing system 49, and the calibration force A registered by the load cell 31 of the calibration devices 19, 19' can be compared with the force registered by the load cell 17 of the weighing system 49, allowing the weighing system 49 to be calibrated.

[0055] Therefore, when the weighing system 49 is calibrated, the calibration force can be released, the weighing system 49 can be moved away from the calibration system 1 via the wheel 47, and thereafter, the next weighing system 49 can occupy the space previously occupied by the weighing system 49 shown in Figure 3.

[0056] The embodiment of the calibration system 1 shown in Figures 1 and 3 can be considered a weighing station in which a movable weighing system 49 can be introduced into the positions of the calibration devices 19, 19' and calibrated one by one.

[0057] Please note that the word "comprising" does not necessarily exclude the existence of other elements or steps not listed.

[0058] Please note that the words "a" and "an" preceding an element do not exclude the existence of multiple such elements.

[0059] Furthermore, please note that the reference numerals do not limit the scope of the claims.

[0060] While features have been shown and described, it should be understood that they do not limit the invention as described in the claims, and it will be apparent to those skilled in the art that various modifications and alterations can be made without departing from the spirit and scope of the invention as described in the claims. Therefore, this specification and the drawings should be considered illustrative rather than restrictive. The invention as described in the claims covers all alternative, modified, and equivalent forms. [Explanation of symbols]

[0061] 1. Calibration System 3. Weighing System 5 containers 7 substance 9. Upper part of the container 11. Lower part of the container 13 Support Leg 15 Base 17 Weighing Systems, Load Cells 19. First calibration device 19' Second calibration device 20 First end of calibration device 21 First mounting section 23 Second end of calibration device 25 Loading part 27 Second mounting section 29 First force acting part 31 Load Cells 33 First end of the load-applying portion 35 The second end of the load-applying portion 37. Slender member 39 Outer circumference of a container 41 Applied surface 43 Top of container 45 Hydraulic pump 46 Hydraulic Line 47 wheels 49 Weighing Systems 51 Chassis 53 Second load-adding section 55 Second loading surface 57 Underside of the chassis 59 Elongated member 61 First end of the second load-applying portion 63 The second end of the second load-applying portion 65 First mounting portion of the second load-applying portion A. First calibration force B horizontal direction C Compression force

Claims

1. A calibration system for a weighing system, wherein the weighing system comprises a first weighing load cell and a first container configured to hold a first substance to be weighed by the first weighing load cell, and the calibration system is - A first calibration device comprising: a first force acting part configured to apply a first calibration force in the direction of gravity; and a first calibration load cell configured to measure the first calibration force; - A base portion configured to provide a first reaction force in the opposite direction to the first calibration force applied via the first calibration device, - A removable force-applying portion connected to the first calibration device, having a force-applying surface, wherein the force-applying portion is configured to be aligned with at least a part of the weighing system for applying the first calibration force to the first container via the first force-applying surface and for transmitting the first calibration force to the first weighing load cell, A calibration system equipped with [the following features].

2. The calibration system according to claim 1, wherein the calibration system comprises at least a second calibration device.

3. The calibration system according to claim 2, wherein the second calibration device is connected to the removable force-applying portion.

4. The calibration system according to claim 2, wherein the first calibration device provides a first portion of the first calibration force applied via the first force-applying surface, and the second calibration device provides a second portion of the first calibration force via the first force surface.

5. The calibration system according to claim 2, wherein the first calibration device is connected to the loading portion on one side of the loading surface, and the second calibration portion is connected to the loading portion on the opposite side of the loading surface.

6. The calibration system according to claim 2, wherein the force applied by the first calibration device and the second calibration device are configured to be synchronized.

7. The calibration system according to claim 2, wherein the first loading axis and / or the second loading axis are located on either side of the loading axis of the weighing device.

8. The calibration system according to any one of claims 1 to 7, wherein the first calibration force is configured to be applied in a direction away from the applied surface.

9. The calibration system according to any one of claims 1 to 8, wherein the force-applying portion is a rigid, elongated member having a length longer than the diameter and / or width of the weighing system.

10. The calibration system according to any one of claims 1 to 9, wherein the applied surface may be one or more surface areas that are in direct or indirect contact with the weighing system or directly or indirectly contact with the container or tank of the weighing system.

11. The calibration system according to any one of claims 1 to 10, wherein the base portion is a removable base portion and has a second loading surface positioned opposite to the first loading surface.

12. A calibration assembly comprising a calibration system and a weighing system according to any one of claims 1 to 11, wherein the weighing system comprises a first weighing load cell and a first container configured to hold a first substance to be weighed by the first weighing load cell.

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