Measuring instrument and method for manufacturing a measuring instrument

Abstract

Measuring device (1) with at least one sensor (3) and with at least one transmitter housing (4), wherein the transmitter housing (4) has at least one terminal compartment (5) and an electronics compartment (6) adjacent to the terminal compartment (5) and connected via a partition (29), wherein at least one first electronic device (8) for connecting supply and / or I / O lines (33) is arranged in the terminal compartment (5) and wherein at least one second electronic device (16) with electronics for controlling the sensor (3) is arranged in the electronics compartment (6), wherein the first electronic device (8) and the second electronic device (16) are electrically connected to each other via a contacting unit (12), wherein the contacting unit (12) is detachably inserted into a recess (30) of the partition (29), characterized by that the contacting unit (12) is permanently connected to the first electronic device (8), the connection being a permanent connection, so that the contacting unit and the electronic device can be handled as one component and that the contacting unit (12) is designed as an electrical feedthrough element, wherein the electrical feedthrough element is designed as a plug with glazed or plastic-encased contact elements (11).

Description

[0001] The invention relates to a measuring device with at least one sensor and at least one transmitter housing, wherein the transmitter housing has at least one terminal compartment and an electronics compartment adjacent to the terminal compartment and connected via a partition, wherein at least one first electronic device for connecting supply and / or I / O lines is arranged in the terminal compartment and wherein at least one second electronic device with electronics for controlling the sensor is arranged in the electronics compartment, wherein the first electronic device and the second electronic device are electrically connected to each other via a contacting unit and wherein the contacting unit is detachably inserted into a recess in the partition.

[0002] Furthermore, the invention relates to a method for manufacturing a measuring device, wherein the measuring device comprises at least one sensor and at least one transmitter housing, wherein the transmitter housing comprises at least one terminal compartment and an electronics compartment adjacent to the terminal compartment and connected via a partition, wherein a first electronic device for connecting supply and / or I / O lines is arranged in the terminal compartment, and wherein a second electronic device with electronics for controlling the sensor is arranged in the electronics compartment, wherein the second electronic device arranged in the electronics compartment comprises a connection unit, wherein a contacting unit is provided which is permanently connected to the first electronic device, wherein the connection is a permanent connection, so that the contacting unit and the electronic device can be handled as a single component.wherein the contacting unit is designed as an electrical feedthrough element, wherein the electrical feedthrough element is designed as a plug with glazed or plastic-encased contact elements, wherein the contacting unit has contact elements in the form of network connection elements and / or signal contact elements for transmitting electrical signals, and wherein the connection unit has connecting elements in the form of network connection elements and / or signal connection elements.

[0003] Measuring instruments are known from the prior art that, in addition to a sensor unit for recording physical or chemical quantities, include a modular electronic unit for controlling and supplying power to the sensor unit, as well as for transmitting and / or evaluating the recorded measurement data. The electronic unit is usually housed in a casing. Depending on the application of the measuring instrument, and in particular the type of explosion hazard, different requirements are placed on the casing and / or the design of the electronic unit in order to prevent the generation and / or propagation of an explosion.

[0004] The following types of ignition protection for electrical devices are relevant within the scope of the invention: "Ex-e" refers to the design requirements for equipment subject to increased safety standards. Measures are taken to prevent the generation of sparks in internal or external parts of electrical components. Such measures include, for example, oversizing critical areas, reinforced operational and basic insulation, overload protection, secure connection of incoming lines, and / or adequate mechanical protection. "Ex-i" refers to the requirements for the intrinsic safety of electrical circuits, or the limitation of energy within them. This means, in particular, that an intrinsically safe circuit must be separated from other circuits by a sufficient distance. The distance between two circuits corresponds to the shortest path between them. A fundamental distinction is made based on the type of medium through which this shortest path passes, resulting in different minimum distances for air gaps, distances within potting compounds, distances through rigid insulation, creepage distances in air, or creepage distances under protective layers.

[0005] For the determination of the minimum distances to be maintained, reference is made to the standards IEC 60664-1:2007, IEC 61010-1:2010 and IEC 60079-11:2011, the content of which is expressly incorporated into this application.

[0006] “Ex-d” refers to the requirement for the design of an enclosure as a flameproof encapsulation, whereby explosions inside the enclosure are permitted under this type of ignition protection, but their effects on the environment are to be prevented by a flameproof design of the enclosure.

[0007] Within the scope of the present invention, a distinction is made between embodiments that meet the requirements for ensuring an explosion-proof measuring device and further embodiments that are suitable for use in a non-explosion-hazardous environment.

[0008] A modular electronic unit for controlling and supplying power to the sensor unit, as well as for forwarding and / or evaluating the recorded measurement data, comprises, within the scope of the present invention, both the electronics for operating the sensor and connections for power supply and I / O lines, i.e., input / output lines. These two units are typically arranged in separate compartments.

[0009] In detail, the electronics for operating the sensor are located in an electronics compartment. This electronics compartment may also have a connection to the sensor unit of the measuring device.

[0010] The connections for power and I / O lines are located in a terminal compartment. Separating these two compartments prevents explosions originating in the electronics compartment from spreading unhindered into the terminal compartment.

[0011] The second electronic device located in the electronics room and the first electronic device located in the terminal room are connected to each other in measuring instruments known from the prior art by means of a contacting unit, whereby both current and electrical signals, in the form of voltages, are transmitted via the contacting unit.

[0012] From the prior art of DE 203 14 618 U1, for example, a measuring device with a housing is known, wherein the housing has two chambers which are connected to each other via a feedthrough space, the feedthrough space being potted with a potting compound. A pin header is provided for the transmission of current and electrical signals, which is connected to the housing by means of a screw.

[0013] German patent application DE 10 2012 005 637 A1 discloses a measuring instrument with a housing, the housing having two chambers, and the two chambers being connected to each other via an encapsulated contact element. Since the contact element itself is already encapsulated and therefore no further encapsulation within the housing is required, defective components can be replaced particularly easily, as only plug connections need to be disconnected.

[0014] Measuring instruments are also known from publications WO 2017 / 003631 A1, WO 2017 / 058545 A1, WO 2016 / 054199 A1, WO 2013 / 052185 A2, WO 2015 / 147993 A1, WO 2015 / 042929 A1 and DE 10 2010 030 924 A1, which have transmitter housings, wherein the transmitter housings are divided into a terminal compartment and an electronics compartment, and wherein an electronics unit is arranged in each of the terminal compartments and the electronics compartments, and the electronics units are connected to each other. Based on this prior art, the present invention is based on the objective of providing a measuring instrument that is easy to manufacture and whose components are particularly easy to replace. Furthermore, the invention is based on the objective of providing a method for manufacturing such a measuring instrument.

[0015] According to a first teaching of the present invention, the aforementioned problem is solved by a measuring device mentioned at the outset in that the contacting unit is firmly connected to the first electronic device.

[0016] According to the invention, it has been recognized that if the contacting unit is permanently connected to the first electronic device, these two components, as an assembly, are particularly easy to mount and replace, resulting in a particularly high degree of modularity for the measuring device as a whole. Within the scope of the present invention, a permanent connection is understood to be an inseparable connection, such that the contacting unit and the electronic device can be handled as a single component. For example, a permanent connection can be an adhesive bond, a soldered connection, or a snap-fit ​​connection. A rigid connection is particularly preferred, with the contacting unit also being designed as a rigid, inflexible component.

[0017] According to a preferred embodiment, the first electronic device is detachably connected to the transmitter housing via at least one fastening means. For example, the first electronic device is screwed to the transmitter housing. Preferably, at least one screw or other fastening means, or at least two screws or two other fastening means, are arranged directly next to the contact unit to stabilize it. The screws or other fastening means are in direct contact with the contact unit. Furthermore, preferably at least one connection between the first electronic device and the transmitter housing is designed as a secure connection to the housing.For this purpose, preferably the first electronic device, in particular the ground potential of the first electronic device, is electrically connected to the transmitter housing.

[0018] According to an advantageous embodiment, the first electronic device comprises a first printed circuit board and / or the second electronic device comprises a second printed circuit board.

[0019] Particularly preferred is the shape of the first electronic device at least partially adapted to the internal shape of the terminal compartment and / or the shape of the second electronic device at least partially adapted to the internal shape of the electronic compartment. If the transmitter housing has a circular cross-section at least in the area of ​​the terminal compartment and / or the electronic compartment, then preferably the first and / or the second electronic device also have the shape of a circle or a segment of a circle, in particular a semicircle.

[0020] Furthermore, the first electronic device preferably has at least one connection element for connecting the mains supply and at least one connection element for connecting the signal transmission elements. The aforementioned connection elements are preferably designed as terminals.

[0021] According to a further embodiment, the first electronic device and the terminal compartment are designed in such a way that the connecting cables running to the connection elements during operation of the measuring device can be mechanically stabilized in the terminal compartment by providing sufficient space.

[0022] According to a further advantageous embodiment, the first electronic device and / or the connection elements, for example in the form of terminals, are covered with an insulating material. This ensures that even if the user opens the terminal compartment, sufficient protection is maintained for the electronic connections.

[0023] According to the invention, the contacting unit is designed as an electrical feedthrough element, wherein the electrical feedthrough element is designed as a plug with contact elements embedded in glass or plastic. In particular, the plug is encased in a metal cylinder. A glass / metal feedthrough element is advantageously suitable for use in potentially explosive atmospheres. A plastic feedthrough element is suitable for use in non-hazardous atmospheres.

[0024] According to a further advantageous embodiment, the contacting unit comprises contact elements in the form of mains connection elements and / or signal contact elements for transmitting electrical signals. The contact elements can be designed as pins or sockets. The contact elements are preferably arranged in pairs.

[0025] According to one design, the network connection elements have a larger cross-section compared to the signal contact elements.

[0026] It is advantageous if the network connection elements and / or the signal contact elements are at least partially metallurgically bonded to the first electronic device. For example, the contact elements can be soldered to the first electronic device.

[0027] It is also advantageous if the contact elements are arranged within a protective collar, which can increase the ignition protection safety of the measuring instrument.

[0028] Furthermore, it is advantageous if the first electronic device is rigidly connected to the contact elements of the contacting unit and if the first electronic device has means for increasing the distance, specifically for increasing creepage distances, between the mains connection elements and the signal contact elements and / or between the signal contact elements themselves, for example, at least one bore and / or at least one slot. The bore and / or the at least one slot is preferably milled into the first electronic device. The at least one bore can be circular and / or have any other geometry adapted to the application. In addition, the at least one slot can be curved or straight and, in particular, have any geometry adapted to the application. In particular, at least one contact element can also be completely enclosed by a recess.

[0029] According to this design, the separation distances required to guarantee an explosion-proof component between the individual contact elements can also be ensured in a confined space.

[0030] According to a further advantageous embodiment, the signal contact elements are arranged circularly in at least one circle around at least one mains connection element. According to a preferred embodiment, the circular arrangement ensures that, with a suitably selected radius of the circle, all signal contact elements maintain the required minimum distance to the at least one mains connection element to guarantee explosion protection.

[0031] In addition, it is also conceivable and advantageous if the signal connection elements are arranged in a different geometric form around at least one network connection element.

[0032] According to one embodiment, the signal connection elements are arranged, preferably circularly, around the at least one network connection element such that the distance between the at least one network connection element and the signal connection elements corresponds at least to the standardized minimum distance to maintain air and creep resistance.

[0033] The signal contact elements are preferably arranged in at least two circles with different radii or distances from the at least one mains connection element. Preferably, all signal contact elements maintain the required minimum distance from the mains connection elements to ensure explosion protection. For example, it can also be provided that at least one distance between at least one signal contact element and a mains connection element, and / or at least one distance between two signal contact elements, and / or at least one distance between the mains connection elements is less than the required minimum distance to ensure explosion protection. While such a configuration can only be used in non-hazardous environments, it offers the advantage of providing a particularly large number of contact elements for signal transmission in a limited space.For example, this makes it possible to implement Gigabit Ethernet connections in confined spaces.

[0034] According to one embodiment, the contacting unit has at least 15 contact elements. According to another embodiment, the contacting unit has at least 22 contact elements.

[0035] According to a further advantageous embodiment, the signal contact elements are grouped into at least one circuit group, wherein the at least one circuit group comprises at least two signal contact elements. Particularly preferably, at least two spatially separated circuit groups are provided. The distance between the circuit groups, i.e., the minimum distance between the signal contact elements of the different circuits, corresponds at least to the standardized minimum distance required to ensure explosion protection.

[0036] According to a further embodiment, the contacting unit is designed such that within at least one circuit group or between at least two circuit groups, at least one distance between two signal contact elements falls below the standardized minimum distance required to maintain air and / or creep resistance. This embodiment is only suitable for use in non-hazardous environments, but has the advantage that many contact elements can be provided in a particularly small space.

[0037] According to a further embodiment of the measuring device according to the invention, the second electronic unit arranged in the electronics compartment has a connection unit that is electrically conductively connected to the contacting unit. Preferably, the connection unit is covered with an insulating material.

[0038] Particularly preferably, the connection unit has connecting elements in the form of network connecting elements and / or signal connecting elements, wherein the connecting elements are electrically conductive and preferably connected to the contact elements by means of a plug connection, wherein the plug connection has an insertion direction, wherein the connection unit is fixedly arranged in the insertion direction and wherein the connection unit is arranged floating perpendicular to the insertion direction in such a way that it adapts to the position of the contacting unit when connected.

[0039] According to this design, the connection between the terminal unit and the contacting unit is self-centering. For example, the terminal unit is arranged to float in a holder. This design has the advantage that the terminal unit can be connected to the contacting unit particularly easily and flexibly during the assembly of the measuring instrument.

[0040] A self-centering connection can be achieved, for example, by designing the connecting elements and / or the contact elements as funnel-shaped receptacles. The funnel-shaped receptacles preferably have a sufficient tolerance range, preferably between 0.2 and 0.5 mm, and more preferably between 0.2 and 0.3 mm.

[0041] According to one embodiment, the opening of the funnel-shaped receptacles has a diameter between 0.2 and 0.5 mm and particularly preferably between 0.2 and 0.3 mm, wherein the neck of the funnel-shaped receptacles tapers at least in sections.

[0042] According to a further preferred embodiment, the second electronic device has a printed circuit board that is at least partially flexible. For example, the printed circuit board can be designed as a flexible printed circuit board, a rigid-flex printed circuit board, a semi-flex printed circuit board, or a twin-flex printed circuit board. Particularly preferably, the printed circuit board has at least two rigid parts and at least one flexible part. The connection unit is particularly preferably designed as a rigid part of the flexible printed circuit board. Furthermore, it is advantageous if the at least two rigid parts of the flexible printed circuit board form an angle, preferably an angle between 90° and 180°, between 90° and 160°, a 90° angle, or an angle between 45° and 90°. Overall, this allows the transmitter housing to be designed to be particularly compact.

[0043] According to a further particularly preferred embodiment, the flexible printed circuit board includes internal conductor tracks. To ensure explosion protection, less stringent requirements are placed on the spacing between these internal conductor tracks. In this way, an explosion-proof measuring device can be provided that simultaneously offers a high number of signal transmission elements in a compact space.

[0044] The electronics for controlling the sensor, located in the electronics compartment, are preferably designed as a compact device insert connected to the second electronic unit via a plug connector. A compact device insert can, for example, comprise stacked, populated circuit boards connected to the second electronic unit by means of a plug connector. This design has the advantage that the entire electronic assembly is particularly easy to replace.

[0045] According to a further embodiment, the second electronic device is detachably connected to the transmitter housing, for example, by a screw connection. Furthermore, a secure connection between the second electronic device and the transmitter housing is preferably provided. This secure connection is preferably achieved by a conductive connection between the ground potential of the second electronic device and the transmitter housing.

[0046] In principle, the transmitter housing can be designed in such a way that the electronics compartment or the elements arranged in the electronics compartment and the terminal compartment or the elements arranged in the terminal compartment meet the requirements of the same or different ignition protection classes.

[0047] For example, both the electronics room and the terminal room can meet the requirements regarding touch protection and electromagnetic compatibility without being suitable for use in potentially explosive atmospheres.

[0048] Furthermore, both the electronics room and the terminal room can meet the requirements regarding touch protection and electromagnetic compatibility, with the electronics room additionally being pressure-resistant encapsulated (Ex-d) and the terminal room meeting the requirements for increased safety (Ex-e).

[0049] Furthermore, both the electronics room and the terminal room can meet the requirements regarding touch protection and electromagnetic compatibility, with the electronics room additionally being pressure-resistant encapsulated (Ex-d) and ensuring safe separation between Ex-e signals (mains voltage) and Ex-i signals (I / O connection).

[0050] Furthermore, both the electronics room and the terminal room can meet the requirements regarding touch protection and electromagnetic compatibility, as well as a pressure-resistant enclosure (Ex-d).

[0051] Finally, both the electronics room and the terminal room can meet the requirements regarding touch protection and electromagnetic compatibility and additionally a pressure-resistant encapsulation (Ex-d), although the contacting unit is not designed to be pressure-resistant.

[0052] According to a second teaching of the present invention, the problem derived at the outset is solved by a method for manufacturing a measuring instrument mentioned at the outset, in that the method comprises the following steps: - Mounting the second electronic device in the electronics room, with the connection unit being arranged in a floating manner, - Mounting the first electronic device in the terminal compartment, whereby the contacting unit is detachably inserted into the partition wall, - wherein the contacting unit is connected to the connection unit by mounting the first electronic device, - wherein the connection unit self-centers to the position of the contacting unit.

[0053] Due to the self-centering connection between the connection unit and the connecting element, the method according to the invention has the advantage that the assembly of such a measuring device is particularly easy.

[0054] The measuring device produced in this way is preferably designed according to one of the embodiments described above.

[0055] In detail, there are numerous possibilities for designing and further developing the measuring device and the method according to the invention. Reference is made to both the claims subordinate to the independent claims and to the following description of preferred embodiments in conjunction with the drawing. The drawing shows Fig. 1 a first embodiment of a measuring instrument, Fig. 2 a first embodiment of a first electronic device, Fig. 3 the first embodiment of a first electronic device in rear view, Fig. 4 the first embodiment of the first electronic device in a different view, Fig. 5 a second embodiment of a first electronic device, Fig. 6 a third embodiment of a first electronic device in a transmitter housing, Fig. 7 a fourth embodiment of a first electronic device in a transmitter housing, Fig. 8 a first embodiment of a second electronic device in a transmitter housing, Fig. 9 the connection unit of the first embodiment of the second electronic device, Fig. 10 an embodiment of a multilayer second electronic device and Fig. 11 a first embodiment of a method according to the invention.

[0056] Fig. Figure 1 shows a representation of a measuring instrument 1 with a sensor 3 for recording a physical quantity and with a transmitter housing 4. The transmitter housing 4 comprises a terminal compartment 5 and an electronics compartment 6 adjacent to the terminal compartment 5 and connected to it by a partition 29. In the illustrated measuring instrument, the terminal compartment 5 is empty or contains no electronic components. The partition 29 has a recess 30 for receiving a contact unit 12. The electronics compartment 6 also has a connection 7 to the sensor 3.

[0057] In Fig. Figure 2 shows a first embodiment of a first electronic device 8 in the form of a printed circuit board (PCB) which is arranged in the terminal compartment 5 during operation. The PCB is semicircular and its shape is adapted to the shape of the inner cross-section of the terminal compartment 5. Terminals 9 for connecting supply and I / O lines 33 are arranged on the PCB. Furthermore, vias 10 are provided, which are permanently connected to the contact elements 11 of the contacting unit 12, as shown below. In the illustrated embodiment, the contact elements 11 are soldered to the vias 10. Therefore, the PCB and the contacting unit 12 can be handled as an assembly and, in particular, mounted and replaced as a unit. To increase the distance between the vias 10 and the contacting unit 12, respectively,The contact elements 11 have circular holes 13 and a curved slot 14 in the circuit board.

[0058] Fig. 3 shows the in Fig. Figure 2 shows the circuit board in a rear view. The illustration shows the side of the circuit board that faces the electronics compartment 6 during operation. In addition to the vias 10 for connection via the terminals 9, a contacting unit 12 in the form of an electrical feedthrough element with contact elements 11 in the form of mains connection elements 11a and signal contact elements 11b is provided. The signal contact elements 11b are arranged circularly around the mains connection elements 11a such that the distance between the mains connection elements 11a and the signal contact elements 11b corresponds to the standardized minimum distance for maintaining air and creep resistance. The requirements for the distance between the signal contact elements 11b themselves are less stringent.In the illustrated embodiment, the distances between the signal contact elements 11b are also dimensioned such that the circuit board is suitable for use in potentially explosive atmospheres. Furthermore, the feedthrough element has a protective collar 32, which increases the ignition protection safety.

[0059] In Fig. Figure 4 shows the first embodiment of the first electronic device 8 in side view.

[0060] The Fig. Figure 5 also shows a first electronic device 8 in the form of a printed circuit board to be arranged in terminal space 5, together with a contacting unit 12 in the form of an electrical feedthrough element arranged on and fixedly connected to the printed circuit board. The signal contact elements 11b arranged on the feedthrough element are arranged in two circles around the mains connection elements 11a. The distance between the signal contact elements 11b arranged on the inner circle and the mains connection elements 11a corresponds to the required minimum distance to ensure air and creep resistance. However, the distance between the signal contact elements 11b arranged on the outer circle and the signal contact elements 11b arranged on the inner circle is less than the required minimum distance, so that the illustrated assembly is only suitable for use in a non-hazardous environment.Advantageously, the electrical feedthrough element has a particularly large number of signal contact elements 11b for transmitting electrical signals.

[0061] In Fig. Figure 6 shows a first electronic device 8 in the form of a printed circuit board (PCB) arranged in the terminal compartment 5. Terminals 9 are arranged on the PCB and are connected to I / O lines 33. The PCB is also connected to the transmitter housing 4 via a screw connection. Furthermore, a secure connection 28 is provided, which electrically connects the ground potential of the PCB to the transmitter housing 4.

[0062] The in Fig. The first electronic device 8 shown in Figure 7, in the form of a printed circuit board, is also arranged in a terminal compartment 5. For user protection, the printed circuit board and the terminals 9 are provided with an insulating cover 15.

[0063] In Fig. Figure 8 shows a first embodiment of a second electronic device 16 in the form of a printed circuit board. The printed circuit board is arranged in the electronics compartment 6 of a transmitter housing 4. The printed circuit board is designed as a rigid-flex printed circuit board, with two rigid printed circuit board sections connected to each other via a flexible section 18. The printed circuit board further comprises a connection unit 17 for connection to the electrical feedthrough element arranged in the terminal compartment 5. The connection unit 17 has connecting elements 19 in the form of network connection elements 19a and signal connection elements 19b, wherein the signal connection elements 19b correspond to the signal contact elements 11b, as shown in Figure 8. Fig. 5 shown, arranged in two circles around the network connection elements 19a.

[0064] The connecting elements 19 are designed such that they can be electrically connected to the contact elements 11 by means of a plug connection. The connecting elements 19 are funnel-shaped for this purpose. The connection unit 17 is arranged perpendicular to the insertion direction of the plug connection and is floating in a holder, thus allowing it to adjust to the position of the feedthrough element when connected to the contact elements 11. Overall, the connection between the connecting elements 19 and the contact elements 11 is therefore self-centering.

[0065] Fig. Figure 9 shows the connection unit 17 of the first embodiment of the second electronic device 16. The connection unit 17 has network connection elements 19a and signal connection elements 19b, wherein the signal connection elements 19b are arranged circularly in two circles around the network connection elements 19a. In addition, the signal connection elements 19b are grouped into circuit groups 20 on the connection unit 17.

[0066] Fig. Figure 10 shows the structure of one embodiment of the rigid-flex printed circuit board (PCB) arranged in the electronics compartment 6. The PCB is designed as a multilayer flex PCB with internal conductor tracks. In the illustrated embodiment, the rigid PCB sections each have six superimposed metallization layers 31. The flexible section 18 of the rigid-flex PCB has two metallization layers, each covered with insulating material. A flexible polyimide film 21, approximately 50 µm thick, is arranged internally, allowing the flexible section 18 of the PCB to bend. The flexible section 18 of the rigid-flex PCB 16 is further covered by a polyimide protective layer 22, which has a thickness between 25 and 50 µm. The PCB also has intermediate layers 23 made of pre-impregnated fiber material, each with a thickness between 250 µm and 600 µm.The rigid part of the circuit board 16 has a solder cover 24.

[0067] In Fig. Figure 11 describes a method 2 for manufacturing a measuring device 1, wherein the measuring device 1 comprises a sensor 3 and a transmitter housing 4, wherein the transmitter housing 4 comprises a terminal compartment 5 and an electronics compartment 6 adjacent to the terminal compartment 5 and connected via a partition 29, wherein a first electronic device 8 for connecting supply and I / O lines 33 is arranged in the terminal compartment 5, and wherein a second electronic device 16 with electronics for controlling the sensor 3 is arranged in the electronics compartment 6, wherein the second electronic device 16 arranged in the electronics compartment 6 comprises a connection unit 17. wherein a contacting unit 12 in the form of an electrical feedthrough element is provided which is permanently connected to the first electronic device 8, wherein the contacting unit 12 has contact elements 11 in the form of mains connection elements 11a and signal contact elements 11b for transmitting electrical signals, wherein the connection unit 17 comprises connecting elements 19 in the form of network connecting elements 19a and signal connecting elements 19b.

[0068] Procedure 2 comprises the following steps: - Mounting 25 of the second electronic device 16 in the electronics compartment 6, wherein the connection unit 17 is arranged in a floating manner, - Mounting 26 of the first electronic device 8 in the terminal compartment 5, wherein the contacting unit 12 is detachably inserted into the partition wall, - wherein by mounting 26 the first electronic device 8 the contacting unit 12 is connected to the connection unit 17, - wherein the connection unit 17 self-centers to the position of the contacting unit 12 27.

[0069] The described method has the advantage that the manufacture of a measuring device 1, in particular the connection of the electrical feedthrough element with the connection unit 17, is particularly simple, which makes both the manufacture and the replacement of the assembly consisting of the electrical feedthrough element and the first electronic device 8 particularly simple. Reference sign 1 measuring device 2 Methods for manufacturing a measuring instrument 3 Sensor 4 Transmitter housings 5 terminal compartment 6 Electronics Room 7 connection 8 First electronic device 9 terminal 10 Through-hole plating 11 contact elements 11a Network connection elements 11b Signal contact elements 12 Contacting unit 13 bore 14 slots 15 insulating covers 16 second electronic device 17 Connection unit 18 flexible part 19 connecting elements 19a Network connection elements 19b Signal connection elements 20 Circuit group 21 film made of flexible polyimide 22 Polyimide protective layer 23 layers of pre-impregnated fibers 24 Solder cover 25. Mounting the second circuit board 26. Assembling the first circuit board 27. Adapt to the position of execution 28 secure connections 29 Partition wall 30 Exclusion 31 Metallization layer 32 protective collars 33 I / O lines

Claims

[1] Measuring device (1) with at least one sensor (3) and with at least one transmitter housing (4), wherein the transmitter housing (4) has at least one terminal compartment (5) and an electronics compartment (6) adjacent to the terminal compartment (5) and connected via a partition (29), wherein at least one first electronic device (8) for connecting supply and / or I / O lines (33) is arranged in the terminal compartment (5) and wherein at least one second electronic device (16) with electronics for controlling the sensor (3) is arranged in the electronics compartment (6), wherein the first electronic device (8) and the second electronic device (16) are electrically connected to each other via a contacting unit (12), wherein the contacting unit (12) is detachably inserted into a recess (30) of the partition (29), characterized by , that the contacting unit (12) is permanently connected to the first electronic device (8), the connection being a permanent connection, so that the contacting unit and the electronic device can be handled as one component and that the contacting unit (12) is designed as an electrical feedthrough element, wherein the electrical feedthrough element is designed as a plug with glazed or plastic-encased contact elements (11). [2] Measuring device (1) according to claim 1, characterized by that the plug is encased in a metal cylinder. [3] Measuring device (1) according to claim 1 or 2, characterized by , that the contacting unit (12) has contact elements (11) in the form of mains connection elements (11a) and / or signal contact elements (11b) for transmitting electrical signals. [4] Measuring device (1) according to claim 3, characterized by, that the network connection elements (11a) and / or the signal contact elements (11b) are at least partially bonded to the first electronic device (8). [5] Measuring device (1) according to claim 3 or 4, characterized by , that the first electronic device (8) is firmly connected to the contact elements (11) of the contacting unit (12) and that the first electronic device (8) has means for increasing the distance between the mains connection elements (11a) and the signal contact elements (11b) and / or between the signal contact elements (11b) themselves and / or between the mains connection elements (11a) themselves, for example at least one bore (13) and / or at least one slot (14). [6] Measuring device (1) according to any one of claims 3 to 5, characterized by , that the signal contact elements (11b) are arranged circularly in at least one circle around at least one network connection element (11a). [7] Measuring device (1) according to any one of claims 3 to 6, characterized by , that the signal contact elements (11b) are arranged, preferably circularly, around the at least one mains connection element (11a) such that the distance between the at least one mains connection element (11a) and the signal contact elements (11b) corresponds at least to the standardized minimum distance to ensure air and creep resistance. [8] Measuring device (1) according to any one of claims 5 to 7, characterized by , that the signal contact elements (11b) are grouped into at least one circuit group (20), wherein the at least one circuit group (20) has at least two signal contact elements (11b). [9] Measuring device (1) according to claim 8, characterized by, that the contacting unit (12) is designed such that within at least one circuit group (20) or between at least two circuit groups (20) at least one distance between two signal contact elements (11b) falls below the standardized minimum distance to comply with air and / or creep resistance. [10] Measuring device (1) according to any one of claims 1 to 9, characterized by , that the second electronic device (16) arranged in the electronics room (6) has a connection unit (17) which is electrically connected to the contacting unit (12). [11] Measuring device (1) according to claim 10, characterized by, that the connection unit (17) has connecting elements (19) in the form of network connecting elements (19a) and / or signal connecting elements (19b), wherein the connecting elements (19) are electrically conductively connected to the contact elements (11), preferably by means of a plug connection, wherein the connection unit (17) is arranged in a floating manner and wherein the connecting elements (19) and / or the contact elements (11) are designed such that the connection between the connecting elements (19) and the contact elements (11) is self-centering. [12] Measuring device (1) according to claim 11, characterized by , that the connecting elements (19) and / or the contact elements (11) are designed as funnel-shaped receptacles. [13] Method (2) for manufacturing a measuring device (1), wherein the measuring device (1) comprises at least one sensor (3) and at least one transmitter housing (4), wherein the transmitter housing (4) comprises at least one terminal compartment (5) and an electronics compartment (6) adjacent to the terminal compartment (5) and connected by a partition, wherein a first electronic device (8) for connecting supply and / or I / O lines (33) is arranged in the terminal compartment (5), and wherein a second electronic device (16) with electronics for controlling the sensor (3) is arranged in the electronics compartment (6), wherein the second electronic device (16) arranged in the electronics compartment (6) comprises a connection unit (17), wherein a contacting unit (12) is provided which is permanently connected to the first electronic device (8), wherein the connection is a permanent connection so that the contacting unit and the electronic device can be handled as one component, wherein the contacting unit (12) is designed as an electrical feedthrough element, wherein the electrical feedthrough element is designed as a plug with glazed or plastic-encased contact elements (11). wherein the contacting unit (12) has contact elements (11) in the form of mains connection elements (11a) and / or signal contact elements (11b) for transmitting electrical signals, wherein the connection unit (17) comprises connection elements (19) in the form of network connection elements (19a) and / or signal connection elements (19b), and wherein the procedure (2) comprises the following steps: - Mounting (25) the second electronic device (16) in the electronics compartment (6), wherein the connection unit (17) is arranged in a floating manner, - Mounting (26) the first electronic device (8) in the terminal compartment (5), wherein the contacting unit (12) is detachably inserted into the partition, - wherein by mounting (26) the first electronic device (8) the contacting unit (12) is connected to the connection unit (17), - wherein the connection unit (17) self-centers to the position of the contacting unit (12) (27).

Images