DE102010062657A1 - Method for providing calibration data to temperature sensor in temperature gauge, involves centrally managing calibration data with associated identifiers for primary temperature sensor, transducer and transmitter in database system - Google Patents

Abstract

The method involves determining calibrating data of primary temperature sensor (4) and transducer (14) of temperature gauge (2). The calibration data associated with identifier of primary sensor and transducer is determined. The associated calibration data of primary temperature sensor together with identifier is stored in a database system (DB). The calibration data with associated identifiers for primary sensor, transducer and transmitter (16) are centrally managed in database system (DB). An independent claim is included for calibration data management system.

Description

The present invention relates to a method for providing calibration data to at least one separately calibratable first meter module.

Measuring equipment often consists of several (i.e., at least two) metering modules. In order to achieve a sufficient accuracy in the measurement variable detection by the measuring device, a calibration is to be carried out at least in the case of a (first) measuring device module (for example a measuring sensor) of the measuring device. A further (second) measuring device module (for example a transmitter or a measuring device electronics) of the measuring device is generally designed such that it can be adapted to the calibration data of the first measuring device module, in particular is adjustable. By such a specific adjustment of the second meter module according to the specific calibration data of the first meter module, very high accuracy of the meter as a whole can be achieved.

For many types of measuring device modules there are uniform specifications across all manufacturers, in particular standards, the relatively detailed requirements with regard to their properties, in particular with regard to their functionality, their maximum permissible errors (or their accuracy) and / or their interface (s) (to at least one other measuring device module). In particular, in the case of temperature measuring devices, the properties of their measuring device modules (in particular temperature primary sensor, measuring sensor, transmitter) are relatively largely defined in corresponding standards. By being compliant with the respective standards, the individual measuring device modules can be combined relatively easily and even across manufacturers. With regard to the measurement accuracy is achieved by each of the measuring device modules from which the relevant measuring device is formed, within the given error tolerances, also achieved an acceptable measurement accuracy in the entire measuring device.

A significantly higher measurement accuracy than merely combining first and second meter modules may be achieved if, as explained above, the second meter module is specifically adapted to the calibration data determined for the first meter module. For example, according to the calibration data of the first measurement module, the second measurement device module can thus correct a signal obtained from the first measurement module (adjustment). However, such a desirable increase in measurement accuracy can only be achieved if the specific calibration data determined for the first meter module is available for a corresponding, specific adaptation of the second meter module that is combined with the first metering module , Although manufacturers of first measuring device modules generally carry out a calibration of the first measuring module during its production. However, the calibration data determined thereby must be clearly assigned to the respectively associated, first measuring device module, stored and made available if required, in particular during assembly with the second measuring device module. This complicates the fact that often the first measuring device module is manufactured and calibrated by a first manufacturer, but the assembling with the second measuring device module is done by a second manufacturer. Accordingly, then often the calibration data determined by the first manufacturer are not available to the second manufacturer and / or there are problems with the unambiguous assignment. In this case, to achieve the desired high measurement accuracy, the second manufacturer must again perform a calibration of the first meter module alone and / or the first and second meter modules in combination. This leads to an increased effort and increased costs.

In the publication WO 2010/069707 A1 a method of manufacturing sensors is described. In this case, the sensor has a memory which can be read and written to via an associated RFID interface (RFID: radio-frequency identification). In the memory, inter alia, data that was determined as part of a calibration of the associated sensor stored. These data can be read out via a corresponding RFID interface. In this way, they are also available at subsequent production stations. That in the publication WO 2010/069707 A1 However, the described method presupposes that the relevant measuring device module has a memory and a corresponding RFID interface. This can be particularly problematic in temperature measuring devices, in which the sensors and the primary sensors usually have neither electronics nor a memory due to the partially prevailing, extreme temperatures. Furthermore, the provision of such a memory and an RFID interface is also associated with higher costs, an increased expenditure and an increased space requirement, which in some measuring device Modules can be problematic. In view of the fact that the calibration data for a first measuring device module should possibly also be provided across manufacturers, it is problematic that in each case a corresponding RFID reader is required for reading out the data from the memory and this type of information acquisition in the manufacturing process of the manufacturer must be integrated. These requirements are often not met by many manufacturers or would be associated with increased effort.

Accordingly, the object of the present invention is to provide a method and a system by which a high measurement accuracy of a measuring device formed from several measuring device can be achieved without this in the production of the measuring device with an increased cost for additional calibrations or Adjustments is connected.

The object is achieved by a method according to claim 1 and by a calibration data management system according to claim 14. Advantageous developments of the invention are specified in the subclaims.

• A) Durchführen einer Kalibrierung des ersten Messeinrichtungs-Moduls und Bestimmen von, zu dem ersten Messeinrichtungs-Modul zugehörigen Kalibrierungsdaten; und
• B) Speichern der, zu dem ersten Messeinrichtungs-Modul zugehörigen Kalibrierungsdaten zusammen mit der Kennung des ersten Messeinrichtungs-Moduls in einem Datenbanksystem, wobei in dem Datenbanksystem Kalibrierungsdaten mit jeweils zugehörigen Kennungen für eine Vielzahl von Messeinrichtungs-Modulen zentral verwaltet werden.

In accordance with the present invention, a method of providing calibration data to at least one separately calibratable first meter module intended to be used in conjunction with at least one second meter module adaptable to calibration data of the first meter module is provided. to provide a measuring device for determining a physical and / or chemical measured variable provided. In the process, the following steps are carried out as part of a production of the measuring device, wherein an identifier specific to this first measuring device module is attached to the first measuring device module:

• A) performing a calibration of the first metering module and determining calibration data associated with the first metering module; and
• B) storing the calibration data associated with the first gauge module, together with the identifier of the first gauge module in a database system, wherein calibration data with associated tags for a plurality of gauge modules are centrally managed in the database system.

The method according to the invention makes it possible to provide calibration data once determined for a (first) measuring device module for the further production method of the associated measuring device and / or for subsequent use of the measuring device in a simple, cost-effective and reliable manner. Due to the specific identifier, a simple assignment of the calibration data to the respective, first measuring device module is possible. In particular, the method according to the invention enables a manufacturer-independent provision of the calibration data. Furthermore, it is not necessary that the equipment of a manufacturer, who would like to use the calibration data for the first measuring device modules for the specific adaptation of the respective second measuring module, must be specially designed. Also, the reading of the identifier from the respective first measuring device module and the procurement of the respective calibration data from the database system can be easily integrated into an existing, automated manufacturing process. In particular, this procurement can be automated relatively easily. Accordingly, the second measuring device module can also be adapted to the calibration data of the associated first measuring device module relatively inexpensively and, if appropriate, in an automated process. The availability of calibration data at the various stages of manufacturing can significantly reduce the calibration effort and therefore the cost of manufacturing the measuring equipment. Also for the storage of the respective calibration data in the database system, there are almost no additional costs. Accordingly, a high measurement accuracy of the measuring device can be achieved by the inventive method in a reliable, cost-effective and simple manner. Furthermore, the method according to the invention makes it possible in a simple manner to record the history of the calibration data from the production method to over the period of use of the measuring device.

By "calibration" in the present context is meant the detection of the deviation from actual values provided by the relevant metering module (eg, outputted sensor signals of a sensor or primary sensor, output signals of a transmitter, etc.) from a reference value (e.g. Actual, correct measured values, desired output values, etc.). The "calibration data" include in particular the data obtained during the calibration. These are, in particular, deviations from the respective reference value and / or coefficients or parameters determined during the calibration, which describe the response behavior, a characteristic curve, etc. of the relevant measuring device module. The "Performing a Calibration of the First Modules Module", if applicable, in the relevant field, may also include performing a calibration another metering module of the same type and from the same manufacturing batch as the first metering module. For example, in some areas, it is common for only a single meter module to be representative of a batch of meter modules and the resulting calibration data to be used representative of all the meter modules of that lot.

By being adaptable to calibration data of the first gauge module, the second gauge module is particularly adapted to the particular calibration data. The adaptation can be formed in particular by an adjustment. During adjustment, the value provided by the first metering module (eg, output sensor signal of a sensor or primary sensor, output of a transmitter, etc.) is set to a correct value (eg, the actual, correct reading, a correct value) Output value, etc.) corrected. Such a correction is possible from the calibration data because the deviations are known due to the calibration data. The adjustment or adaptation can in particular take place in that corresponding parameters of an electronic system (of the second measuring device module) which processes the signal provided by the first measuring device module, as a function of the specifically determined calibration data (of the first measuring device module and optionally also the second measuring device module and / or other measuring device modules).

The measuring device is formed from two or more measuring device modules. The modular measuring device can be designed in particular as a compact device. Alternatively, however, it may also be decentralized, as is the case, for example, with a separate sensor which is connected via a cable or wirelessly to an associated transmitter. Furthermore, the measuring device (in addition to exactly one) may also have a plurality of first measuring device modules in the sense of the method according to the invention and / or (besides exactly one) also a plurality of second measuring device modules in the sense of the method according to the invention. Generally, in the context of this application, "at least one" refers to exactly one as well as alternatively to several. This applies in principle in the following description, even if not always pointed out. As will also be apparent from the exemplary embodiments explained below, the method according to the invention can also be implemented at different production stages, in particular also several times in the context of the production of the measuring device. For example, there is a possibility that after a first metering module (eg, primary sensor) has been assembled with the associated second metering module, the combined unit (eg, sensor) obtained therefrom will again be a first metering module within the meaning of the present invention, to whose calibration data a second metering module (eg a transmitter) is specifically adaptable.

By having the identifier specific to the respective first meter module, the tag allows unique association of the calibration data with the respective meter module (s) and vice versa. In particular, as known in the art, the "database system" consists of management software and the data to be managed, which constitute the actual database. Access to the database system for reading and / or writing data takes place in particular via the Internet and / or an intranet. Optionally, a protected access for the respective manufacturer, users, etc. can be provided to the database system, such as a password-protected access. In contrast to database systems that are managed by users to capture inventory data for their respective investment, the present database system by a manufacturer (the first measuring module, the second measuring module and / or another part of the measuring device) or through one, from the manufacturers, who are involved in the manufacturing process of the measuring device, independent service providers. In this case, calibration data in each case with associated identifiers for a plurality of first measuring device modules are managed in the database system. In addition, other data relating to components of measuring devices, in particular of different types of measuring devices, and / or the measuring devices as a whole can also be centrally managed in the database system together with corresponding identifiers.

The steps of performing a calibration (step A)) and storing (step B)) are carried out in particular within the framework of a production of the first measuring device module. In this way, they are available at all subsequent production stages.

According to a further development, the modes of operation of the first and the second measuring device module and / or the interface (s) between the first and the second measuring device module are / are uniform according to manufacturer-independent specifications, in particular according to at least a standard, trained. As explained above, such measuring device modules are produced on the basis of uniform specifications by different manufacturers and then (possibly by another manufacturer) combined. As a result, several manufacturers are usually involved in the manufacturing process of the measuring device. In order nevertheless to achieve a high measuring accuracy by adapting the respectively second measuring device module specifically to the calibration data of the associated first measuring device module and to not appreciably increase the costs for the production, the method according to the invention is particularly advantageous here. "Operation" refers in particular to a characteristic, a response, requirements for at least one input signal of the measuring device module, requirements for at least one output signal of the measuring device module and / or an allowable error tolerance, a predetermined minimum accuracy, etc. ,

• C) Durchführen einer Kalibrierung des zweiten Messeinrichtungs-Moduls und Bestimmen von, zu dem zweiten Messeinrichtungs-Modul zugehörgen Kalibrierungsdaten; und
• D) Speichern der, zu dem zweiten Messeinrichtungs-Modul zugehörigen Kalibrierungsdaten zusammen mit der Kennung des zweiten Messeinrichtungs-Moduls in dem Datenbanksystem.

According to a further development, the second measuring device module can be calibrated separately and during a production of the second measuring device module, the following steps are carried out, wherein an identifier specific to this second measuring device module is attached to the second measuring device module:

• C) performing a calibration of the second gauge module and determining calibration data associated with the second gauge module; and
• D) storing the calibration data associated with the second gauge module together with the identifier of the second gauge module in the database system.

In this way, calibration data of the second measuring device module are made available at the subsequent production stages and / or when using the measuring device. This refinement is advantageous, in particular, when the signal output by the second measuring device module is in turn utilized by a higher-level module (eg a higher-level electronics and / or a higher-level transmitter) and consequently a corresponding, specific adaptation or adjustment of the higher-level module is enabled. Further, the second metering module (eg, a transmitter) itself can also be appropriately adjusted so that the deviations thereof are corrected in this way. The steps C) and D) with respect to the second measuring device module are not in temporal relation to the steps A) and B) with respect to the first measuring device module. In particular, they may be performed by a different manufacturer, such as steps A) and B), and yet the respective calibration data (of the first and second metering modules) are centrally available in the database system.

• E) Erfassen der Kennung des ersten Messeinrichtungs-Moduls und Auslesen von, zu dieser Kennung zugehörigen Kalibrierungsdaten aus dem Datenbanksystem;
• F) Spezifisches Anpassen des zweiten Messeinrichtungs-Moduls an die ausgelesenen Kalibrierungsdaten des ersten Messeinrichtungs-Moduls.

According to a further development, subsequent steps in the production of the measuring device are carried out from the at least one first measuring device module and the at least one second measuring device module:

• E) detecting the identifier of the first measuring device module and reading out calibration data relating to this identifier from the database system;
• F) customizing the second meter module to the read calibration data of the first meter module.

In the specific adaptation, in particular an adjustment of the second measuring module is performed. The detection of the identifier takes place in particular at the first measuring device module itself (eg by reading a barcode, an RFID chip, etc.). Owing to the provision of the calibration data according to the invention, steps E) and F) can be carried out by a different manufacturer, such as steps A) and B) and, if appropriate, as steps C) and D), without this leading to increased complexity or reduced measurement accuracy leads.

• G) Erfassen der Kennungen des ersten und des zweiten Messeinrichtungs-Moduls und Auslesen von, zu diesen Kennungen zugehörigen Kalibrierungsdaten des ersten und des zweiten Messeinrichtungs-Moduls aus dem Datenbanksystem;
• H) Bestimmen der Kalibrierungsdaten der Messeinrichtung als Ganzes aus den ausgelesenen Kalibrierungsdaten des ersten und des zweiten Messeinrichtungs-Moduls; und
• I) Speichern der, zu dieser Messeinrichtung als Ganzes zugehörigen Kalibrierungsdaten zusammen mit der Kennung dieser Messeinrichtung in dem Datenbanksystem, wobei in dem Datenbanksystem Kalibrierungsdaten mit jeweils zugehörigen Kennungen für eine Vielzahl von Messeinrichtungen (als Ganzes) zentral verwaltet werden.

According to a further development, subsequent steps in the manufacture of the measuring device are carried out from the at least one first measuring device module and the at least one second measuring device module, wherein an identifier specific to this measuring device is attached or formed on the measuring device:

• G) detecting the identifiers of the first and second measurement module and reading from the database system calibration data of the first and second measurement module associated therewith;
• H) determining the calibration data of the measuring device as a whole from the read calibration data of the first and the second measuring device module; and
• I) storing the, associated with this measuring device as a whole calibration data together with the identifier of this measuring device in the database system, wherein in the database system calibration data, each with associated identifiers for a variety of measuring devices (as a whole) are centrally managed.

By both the calibration data of the first and the second measuring device module (and possibly of other components or modules of the measuring device) can be read centrally from the database system, the Calibration data of the measuring device as a whole can be determined in a simple manner from the read calibration data. As a result, the effort for calibration of the measuring device as a whole can either be completely saved and / or it may be sufficient to only pass through fewer calibration measuring points during the calibration of the measuring device as a rule than is normally necessary for a calibration. Furthermore, it is advantageous that the calibration data of the measuring device as a whole are also available for the later use of the measuring device, in particular for a user of the measuring device. This is advantageous in particular when the user carries out a re-calibration (and as a rule re-adjustment) of the measuring device. The steps G), H) and I) can in turn be performed by a manufacturer other than one or more of the above-explained steps A) to F), without this leading to an increased effort or a lower measurement accuracy.

A re-calibration and / or re-adjustment of the measuring device as a whole or of measuring device modules thereof may be necessary in particular when the measuring device is put into operation and / or at regular intervals (eg after certain periods of use, etc.) by the user be. For example, a re-calibration may already be required directly at start-up because the measuring device was previously stored for a longer period of time (eg, by the user). The frequency of such re-calibrations and / or re-adjustments depends on the particular process in which the measuring device is used, the applicable regulations, the respective measuring device, etc. from. In the re-calibration, as explained above, again the deviations) of an actual value provided by the relevant measuring device module and / or the measuring device as a whole with the existing settings are recorded by a reference value. The existing settings were set in particular in the case of a preceding, manufacturer-side or user-side calibration and adjustment. Upon re-adjustment, as explained above, the value provided by the first meter module and / or the meter as a whole is corrected again to a correct value. The re-adjustment takes place, in particular, again by a corresponding setting or adaptation of the parameters of an electronic system (eg, the second measuring device module).

• K) Durchführen einer Kalibrierung der Messeinrichtung als Ganzes und Bestimmen von, zu dieser Messeinrichtung als Ganzes zugehörigen Kalibrierungsdaten; und
• L) Speichern der, zu dieser Messeinrichtung als Ganzes zugehörigen Kalibrierungsdaten zusammen mit der Kennung dieser Messeinrichtung in dem Datenbanksystem, wobei in dem Datenbanksystem Kalibrierungsdaten mit jeweils zugehörigen Kennungen für eine Vielzahl von Messeinrichtungen (als Ganzes) zentral verwaltet werden.

According to a development, subsequent steps in the production of the measuring device from the at least one first measuring module and the at least one second measuring module and / or commissioning of the measuring device are carried out by a user, wherein at the measuring device a, for this measuring device specific identifier is attached or formed:

• K) performing a calibration of the measuring device as a whole and determining calibration data associated with said measuring device as a whole; and
• L) storing the, associated with this measuring device as a whole calibration data together with the identifier of this measuring device in the database system, wherein in the database system calibration data with respective identifiers for a variety of measuring devices (as a whole) are centrally managed.

In this way, a comparison with calibration data from previous calibrations is possible. In particular, forecasts can thus be created and aging phenomena can be observed. Such information about the historical development of the calibration data may be particularly interesting for a manufacturer (a component of the measuring device or the measuring device as a whole) to evaluate the long-term use behavior under the respective conditions of use and the users based on the knowledge gained from the Calibration (and usually re-adjustment), fault analysis, maintenance, forecasting or deciding when to replace the device, etc. Again, steps K) and L) may be performed by a different manufacturer or user than one or more of the steps discussed above.

According to a development, the first measuring device module is formed by a primary sensor or by a sensor. The primary sensor is a sensor unit which can be calibrated separately and in which it no longer makes sense to subdivide it into even smaller units with regard to a calibration. In the field of temperature measurement, for example, a Pt100 or a Pt1000 forms such a primary sensor. As sensor is generally referred to a sensor unit. This may optionally have a primary sensor and also other components. In general, the output signal of the sensor is fed directly to a transmitter or generally an electronic device of the measuring device as an input signal, so that a corresponding conversion and / or processing of this signal can take place in the transmitter or the electronics.

According to a development, the first measuring device module forms a processorless unit. Especially with such measuring device modules, the inventive method is particularly advantageous because then a local storage of Calibration data on the measuring device module itself is not possible or only with difficulty. Furthermore, the measuring device module can be configured in such a cost-effective manner and with a high degree of robustness (for example, against extreme operating conditions). According to a development, the second measuring device module is formed by a transmitter (or measuring transducer). In this case, an electronic device is described as the transmitter which converts an input variable (in this case in particular an input variable obtained from the first measuring device module) into an output variable in accordance with a fixed relationship (which can be adaptable, in particular, by means of corresponding parameter settings). Such a transmitter, as known in the art, may be adjusted according to the calibration data so that errors contained in the input signal are corrected accordingly. The transmitter can work analog and / or digital.

According to a development, the measuring device is formed by a temperature measuring device. Especially in the case of temperature measuring devices, the individual measuring device modules, from which such temperature measuring devices are formed, are designed according to manufacturer-uniform specifications, in particular according to corresponding standards. Often, therefore, several manufacturers are involved in the production of such temperature measuring devices, so that the inventive method is particularly advantageous here. Alternatively, the inventive method is also possible with respect to other measuring devices, such. For humidity sensors, pH meters, redox potential measuring devices, pressure gauges, flowmeters, etc.

• – Kalibrierungsdaten aus dem Datenbanksystem auslesbar; und/oder
• – Kalibrierungsdaten in das Datenbanksystem schreibbar sind.

According to a development, the database system is designed in such a way that manufacturer-independent by a respective manufacturer and / or by a user of a measuring device stating the respective identifier (the respective measuring module and / or the measuring device as a whole, depending on the type of calibration data)

• - Calibration data from the database system readable; and or
• - Calibration data in the database system are writable.

Optionally, each may be a protected access to the database system. Such cross-manufacturer access to the database system makes it possible to use the data recorded in the database system at all production stages of the measuring device. Furthermore, these data can also be used by a user of the measuring device during their period of use and further updated. In particular, the latter option allows a user to be re-calibrated (and typically readjusted) by the particular manufacturer (a component of the measuring device or the measuring device as a whole), an error analysis, a maintenance, a forecast or decision on when to replace the device, etc., is supported. Furthermore, the respective manufacturer (a component of the measuring device or of the measuring device as a whole) can also gain general knowledge from these data, such as the operational behavior of the respective measuring device under different operating conditions, which he can also use to assist and advise other users.

The method according to the invention and in particular the present development also makes it possible for a user to be effectively supported by the respective manufacturer (a component of the measuring device or the measuring device as a whole) in a remote calibration and in a remote adjustment, since the manufacturer then receives further information regarding the relevant measuring device be available. In such a remote calibration, the calibration is carried out on-site at the user, the results are communicated to the manufacturer and this informs the user as part of the remote adjustment, which settings are made on the measuring device. These settings are made, in particular, on the second measuring device module of the measuring device, such as, for example, on a transmitter or electronics. The advantage here is that on site at the user only one, trained for performing the calibration person must be present. The results of the calibration can then be entered in the database system. A qualified personnel or a manufacturer-operated program that determines the settings required for the measuring device in question can carry out this determination remotely by accessing the database system and using the calibration data obtained. In this case, due to the availability of the further calibration data stored in the database system for the measuring device, the qualified personnel can gain further knowledge which is advantageous for advising the user. For example, significant deviations of the calibration data determined during remote calibration from the calibration data of one or more previous calibrations may indicate an advanced aging condition of the measuring device or a module thereof. The notification of the settings to the user can take place, for example, in text form, so that the staff present on site can make adjustments to the measuring device according to the instructions. Alternatively, however, the database system can also be configured such that the measuring device (in particular the second measuring device) Module) is connected to the database system and the manufacturer (by a suitable specialist personnel or by a corresponding program) an algorithm on the measuring device (in particular on the second measuring device module) is transmitted, so that the required settings are made automatically.

There are different ways to provide a measuring device module or the measuring device as a whole with an identifier. According to a development, the identifier is identified by an RFID identifier (RFID: radio-frequency identification), by a barcode, by a serial number, by a label, and / or by a visually detectable, unique design of the object to be marked itself or a part thereof. With "optical detection" is generally referred to a detection using electromagnetic waves.

In principle, different wavelength ranges are possible, with the visible range being preferred. The "unique embodiment" may be, for example, an optically detectable embodiment of the respective object to be marked (first or second measuring device module, measuring device, etc.) as a whole or alternatively also a part thereof. The unique configuration may be, for example, production-related, such as, for example, obtained in a pressing process, unique surface structure of a particular part of the object to be marked. The identifier may be fixed or detachable attached to the object to be marked or form an integral part of the same. In addition to the variants of an identifier explained above, other alternatives are also possible, such as, for example, an otherwise readable, electronic data carrier, etc. Furthermore, it must be taken into account that the identifier attached or intended to the respective object to be marked is not necessarily identical to the one shown in FIG. must be in the database system. It is essential that a clear assignment between these is possible.

According to a further development, the measuring device has a storage medium in which the calibration data relating to at least one measuring device module of the measuring device and / or the calibration data associated with the measuring device as a whole, which were respectively determined in at least one calibration performed by the manufacturer, for Readout will be provided. In this way, the relevant calibration data can additionally be provided locally at the relevant measuring device. In the storage medium and in the method for reading different technical alternatives are possible. The storage medium may be firmly connected to the measuring device, but it may also be detachably attached thereto (for example in the form of a removable RFID chip). In particular, the storage medium is formed by an electronic memory, which is associated, for example, with a processor of the measuring device (eg the transmitter). Furthermore, the storage medium can also be formed by an RFID chip. Furthermore, there is the possibility that the calibration data are provided at the measuring device for optical reading (for example in the form of a bar code, etc.). A "calibration carried out by the manufacturer" is understood to mean a calibration which was carried out by the respective manufacturer during the production of the respective measuring device module and / or during the production of the measuring device as a whole. If the first and / or the second measuring device module has / have a corresponding storage medium assigned to this measuring device module, additionally or alternatively, the calibration data associated with this measuring device module can be provided locally on this storage medium.

The present invention further relates to a calibration data management system comprising: a plurality of first, separately calibratable meter modules, each intended, in use, together with at least one second meter module, each to calibrate data of the associated first meter Module is adaptable to form a measuring device for determining a physical and / or chemical measured variable, and to each of which a, for the respective, first measuring module specific identifier is attached or formed, and a database system, which is designed such that in this to the respective first measuring device modules associated calibration data, which were determined at one, carried out in the production of the measuring device calibration of the respective first measuring device modules, together with the respective associated specific identifier manufacturer spanning s are storable and from this under this specific identifier manufacturers can be read out. In the calibration data management system according to the invention, the advantages explained above with respect to the method according to the invention are achieved in a corresponding manner. Furthermore, the embodiments and variants explained above with regard to the method according to the invention can be implemented in a corresponding manner.

Further advantages and advantages of the invention will become apparent from the following Description of an embodiment with reference to the accompanying figures. From the figures show:

1 a schematic representation of a temperature measuring device;

2 : a schematic representation of the individual components or assemblies of, in 1 illustrated temperature measuring device; and

3 : a schematic representation of an embodiment of the method according to the invention.

In 1 is schematically the structure of a temperature measuring device 2 shown. The temperature measuring device 2 has a temperature primary sensor 4 which is formed in the present embodiment by a Pt100 (ie, platinum temperature sensor having a nominal resistance of 100 Ω at a temperature of 0 ° C). Depending on the temperature measuring device, another temperature primary sensor, such as a Pt1000, a thermocouple, a thin-film temperature sensor, etc., may also be used here. The temperature primary sensor 4 is within a (usually standardized, often tubular) housing 6 introduced at its distal end. The housing 6 is formed by a steel pipe in the present embodiment. The connections 8th of the temperature primary sensor 4 are there with appropriate supply lines 10 extending inside and along the extension direction of the housing 6 extend, conductively connected. As is known in the art, the temperature primary sensor 4 depending on the measuring method in different circuit techniques, in particular be connected in a two-wire circuit, a three-wire circuit or in a four-wire circuit. The supply lines 10 are inside the case 6 isolated from each other, for example, by filling the housing with an insulator material 12 (For example, loose or pressed MgO powder or Al ₂ O ₃ powder) can take place. The combination of the temperature primary sensor 4 with the (tubular) housing 6 obtained sensors 14 is sometimes referred to as a jacket sensor.

The sensor signals of the sensor 14 become a transmitter 16 as described by supply lines 10 Alternatively, but also via a wireless connection, supplied as input signals. The transmitter 16 converts the input signals into corresponding output signals corresponding to the respective measured value. In this case, the transmitter 16 output the output signal, for example, according to the 4-20 mA standard, according to a digital field bus protocol (z. B. ^® Profibus, Fieldbus Foundation ^®, HART ^®, etc.) or as a pulse signal, etc.. At the transmitter 16 In this case, certain parameters can be set to perform an adjustment. By such an adjustment, it is possible in particular to deviations which occur at the sensor 14 occur (sensor error) and / or deviations occurring at the transmitter 16 occur (electronic fault), specifically compensated. In this way, a very high measurement accuracy can be achieved. The transmitter 16 In particular, it has a processor 18 (For example, a microprocessor), which performs among other things, the signal conversion in conjunction with an integrated or separate analog / digital converter. The transmitter 16 also has an electronic memory 20 on which the processor 18 can access. In addition, the transmitter 16 also other functions, such as the setting of a measuring current in the sensor 14 , etc., perform. The output signals of the transmitter 16 be via appropriate, electrical connections 22 issued (where alternatively also a wireless communication is possible). The sensor 14 in the present embodiment additionally by an outer protective sleeve 24 , which is formed in the form of a protective tube surrounded. Also the transmitter 16 is in a corresponding outer housing 26 housed, from which the connections 22 the transmitter 16 lead out.

In 2 are the above-explained components or assemblies of the temperature measuring device 2 again shown individually. The division into these components or assemblies is chosen such as often done the division of production to different manufacturers. The first component is the temperature primary sensor 4 , The second assembly forms the (tubular) housing 6 with the leads running inside 10 and the insulator material contained therein 12 , The third module is the transmitter 16 , The fourth assembly forms the protective tube 24 and the outer case 26 , The properties of these components or assemblies are relatively largely defined by standards in temperature measuring devices. As based on the 2 is apparent is at the temperature primary sensor 4 one, for this specific identifier 27 _P , is on the case 6 one for the sensor 14 specific identifier 27 _M , is at the transmitter 16 one, for this specific identifier 27 _T and is on the temperature gauge 2 a, for this as a whole specific identifier 27 _G attached. The identifiers 27 _P , 27 _M , 27 _T and 27 _G are formed for example by a serial number, a bar code, an RFID chip, etc., wherein different types of identifiers can be used in the various items to be marked.

The following is with reference to 3 a manufacturing method of the temperature measuring device 2 including the calibrations made by the manufacturer. Furthermore, a later use of the temperature measuring device 2 received by a user. The temperature primary sensor 4 forms the smallest, separately calibratable sensor unit of the temperature measuring device 2 , In 3 is in the left, dashed box a (separate) calibration of the temperature primary sensor 4 shown. For this purpose, the temperature primary sensor is located 4 in a calibration environment 28 in which in each case a known temperature is set. As part of the calibration, for example, the dependence of the electrical resistance of the temperature primary sensor 4 determined by the temperature. The calibration data can be formed in particular by deviations from the respective reference value (at different measuring points) or in the present case, in the area of the temperature measurement with a platinum resistance, by the Calendar-van-Dusen-coefficients. The Calendar-van Dusen coefficients describe the temperature dependence of the electrical resistance by a polynomial (usually 3rd degree). The calibration of the temperature primary sensor 4 is usually by the manufacturer of the temperature primary sensor 4 carried out. So that the determined calibration data K _{P of} the temperature primary sensor 4 also for the further production stages and / or for a user of the temperature measuring device 2 be made available, they are in the database system DB under the identifier 27 _{P of} the respective temperature-primary sensor 4 saved. This is in 3 schematically by the solid arrow 30 shown.

The database system DB is managed by an independent service provider in the present embodiment, for example. In the database system DB calibration data are stored with associated identifiers for a variety of primary temperature sensors, sensors, transmitters, temperature measuring devices, other measuring device modules and other measuring devices. In addition, other data D other than calibration data, such as information relating to maintenance, operating instructions, material data, etc., about the modules and measuring devices detected therein, can also be stored and managed in the database system DB. This is in 3 schematically represented by the data D. Access to the database system DB by the various manufacturers as well as by users of the respective measuring devices takes place, for example, via the Internet via a corresponding, password-protected access. The password-protected access can be set up in such a way that in each case only access to the information is obtained in which an authorization exists. Alternatively, the database system DB can be formed, for example, by the database system W @ M provided by Endress + Hauser.

The next step is in the production of the temperature primary sensor 4 in the case 6 introduced and its connections 8th become conductive with the supply lines 10 connected. The sensor obtained thereby 14 again forms a separately calibratable component. This assembling the sensor 14 can be done by a different manufacturer and also at a different location (which in turn is represented by the dashed box). In general, by the manufacturer, which is the sensor 14 Assembling, also a calibration of the sensor 14 done as a whole. Accordingly, the sensor is 14 again in a calibration environment 32 (eg calibration bath). As part of the calibration of the sensor 14 can the calibration data K _{P of} the temperature primary sensor 4 be interesting (for example, to recognize tendencies, deviations, errors, etc.). The manufacturer of the sensor 14 can therefore, indicating the identifier 27 _{P of} the temperature primary sensor 4 the associated calibration data K _{P of} the temperature primary sensor 4 read from the database system DB. This is in 3 through the solid arrow 34 shown.

Partially, depending on the design of the sensor 14 , the calibration data K _{P of} the temperature primary sensor 4 also be needed to the other components of the sensor 14 according to the calibration data to adjust or adjust. The latter case would be particularly relevant if the sensor 14 in addition to the temperature primary sensor 4 Also, an electronics or a processor would have, so that even at this stage an adjustment would be possible. In this case, the temperature primary sensor would be 4 a first measuring module and the electronics or the processor of the sensor 14 would be a second measuring module in the sense of the present invention. In the present embodiment, however, the sensor is 14 a processorless unit that has no particular signal processing electronics and no processor.

The calibration of the sensor 14 will match as above with respect to the primary temperature sensor 4 was explained. The determined calibration data K _{M of} the sensor 14 are in the database system DB under the, for this sensor 14 specific identifier 27 _M saved. This is in 3 schematically by the dashed arrow 36 shown.

Also with transmitters 16 As a rule, deviations of the actual output signal output from a respective desired value (for a given input signal in each case). To correct (ie, adjust) these deviations, they must first be calibrated as part of the transmitter 16 be determined. Such a calibration is for example by a manufacturer of the transmitter 16 performed by someone other than the manufacturer of the temperature primary sensor 4 and the sensor 14 as a whole can be. Accordingly, the calibration of the transmitter 16 take place at a different location, by a different manufacturer and / or at a different time than the above-explained calibrations, which in 3 represented by the dashed box. When calibrating the transmitter 16 be the transmitter 16 supplied different input signals (see Box 38 and arrow 40 in 3 ) and it will each be from the transmitter 16 output signal detected. The deviations of the output signal output are determined by the corresponding setpoint. The determined calibration data K _{T of} the transmitter 16 are in the database system DB under the for this transmitter 16 specific identifier 27 _T saved. This is in 3 schematically by the short dashed arrow 42 shown.

The next step will be the sensor 14 with the transmitter 16 assembled. If necessary, the sensor becomes 14 even with a protective sleeve 24 provided and around the upper section of the unit which the transmitter 16 has, if necessary, an outer housing 26 attached (as shown in the illustrated embodiment in the figures). This assembly may be performed by another manufacturer, particularly at one location and at a time other than the steps discussed above. The settings of the transmitter 16 can now contact the calibration data KM of the sensor 14 and to the calibration data K _{T of} the transmitter 16 be adjusted. In particular, the transmitter 16 be adjusted in accordance with these calibration data such that in each case a correct measured value by the transmitter 16 is issued. Accordingly, the sensor forms 14 in this embodiment, a first measuring device module according to the present invention and the transmitter 16 forms a second measuring device module in the sense of the present invention. The reading of the calibration data K _{M of} the sensor 14 is in 3 schematically by the dashed arrow 44 shown. The reading of the calibration data K _{T of} the transmitter 16 is in 3 schematically by the short dashed arrow 46 shown.

It may be the case that the manufacturer, which the assembly of the temperature measuring device 2 as a whole, has no possibilities for performing a calibration of the same. In this case he can use the identifiers 27 _M , 27 _{T of} the sensor 14 and the transmitter 16 in each case read out the associated calibration data K _M and K _T from the database system DB and from this the calibration data K _{G of} the temperature measuring device 2 determine as a whole (without him even an independent calibration of the temperature measuring device 2 to perform as a whole). Alternatively, he can also do a calibration of the temperature measuring device 2 as a whole carry what is in 3 schematically through the calibration environment 48 (eg calibration bath). Due to the extensive, available calibration data of the primary temperature sensor 4 , the sensor 14 and the transmitter 16 already fewer calibration measuring points for determining the calibration data K _{G of} the temperature measuring device 2 as a whole is sufficient than is normally required to perform a calibration. The determined calibration data KG of the temperature measuring device 2 as a whole, in the database system DB below that for this temperature gauge 2 specific identifier 27 _G saved. This is in 3 schematically by the dot-dashed arrow 50 shown.

The user, which is a temperature measuring device 2 Depending on the process conditions and the regulations that apply to the respective process, this has to be done when commissioning the temperature measuring device 2 and / or at regular intervals (eg, after certain periods of use, etc.) a re-calibration and usually a re-adjustment of the temperature measuring device 2 perform. This is done regularly at a different location and at different times than the previously explained steps, which is schematically represented by the dashed box. The calibration is carried out in 3 schematically through the calibration 52 shown. For carrying out the calibration of the temperature measuring device 2 For example, the calibration data K _P , K _M , K _T and in particular K _G determined by the manufacturer can provide valuable information, as explained above in the general description section. The readout of the manufacturer-determined calibration data KG by the user from the database system DB is in 3 schematically by dotted arrow 54 shown. The calibration data K _{R of} the temperature measuring device determined by the user during the calibration 2 as a whole, in turn, by the user in the database system DB under the, for this temperature measuring device 2 specific identifier 27 _G saved. This is in 3 schematically by the dotted arrow 56 shown. To this The temporal development of the calibration data can thus be tracked and evaluated, as explained above in the general description section. Furthermore, the user can, for example, access this calibration data K _R during a calibration performed later, which results in 3 schematically by the dotted arrow 58 is shown. Such re-calibrations and / or re-adjustments made by the user may also be performed as a remote calibration. Furthermore, there is the possibility that the, to the temperature measuring device 2 Calibration data KG determined as a whole and / or the individual measuring device modules of the temperature measuring device 2 determined calibration data (eg K _P , K _M and / or K _T ) or the data required for a (re) adjustment locally in the memory 20 the transmitter 16 get saved.

The present invention is not limited to the embodiments explained with reference to the figures. Additionally or alternatively, the temperature primary sensor 4 as the first measuring device module and the transmitter 16 be designed as a second measuring device module. This case is particularly relevant when the primary sensor (in contrast to the illustrated embodiment) is used directly, without further obstruction, so that, provided by the primary sensor sensor signals (at least largely) unchanged to the second measuring device module, in particular to a Transmitter, be provided. In this variant, the second measuring device module, in particular the transmitter, is then adapted to the calibration data of the primary sensor. Furthermore, in some designs of measuring devices, it may additionally or alternatively be provided that a transmitter of the measuring device forms a first measuring device module in the sense of the present invention and a module which is superior to the transmitter (such as a control unit of the measuring device formed separately from the transmitter) forms a second measuring device module in the sense of the present invention.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2010/069707 A1 [0005, 0005]

Claims (14)

Method for providing calibration data to at least one, separately calibratable, first measuring module ( 4 ; 14 ) intended to be used in conjunction with at least one second measuring module ( 16 ), based on calibration data of the first measuring module ( 4 ; 14 ), a measuring device ( 2 ) for determining a physical and / or chemical measurand, characterized by the following steps, which are part of a production of the measuring device ( 2 ), wherein at the first measuring device module ( 4 ; 14 ) one, for this first measuring device module ( 4 ; 14 ) specific identifier ( 27 _P ; 27 _M) attached to or formed: A) performing calibration of the first measuring setup module ( 4 ; 14 ) and determining, to the first metering module ( 4 ; 14 ) associated calibration data (K _P ; K _M ); and B) storing the, to the first measuring device module ( 4 ; 14 ) associated calibration data (K _P ; K _M ) together with the identifier ( 27 _P ; 27 _P ) of the first measuring module ( 4 ; 14 ) in a database system (DB), wherein in the database system (DB) calibration data, each with associated identifiers for a plurality of measuring device modules are centrally managed. Method according to claim 1, characterized in that the functions of the first ( 4 ; 14 ) and the second ( 16 ) Measuring module and / or the interfaces) between the first ( 4 ; 14 ) and the second ( 16 ) Measuring device module according to manufacturer-uniform specifications, in particular according to at least one standard is formed / are. Method according to claim 1 or 2, characterized in that the second measuring device module ( 16 ) is calibrated separately and that in the context of a production of the second measuring module ( 16 ) subsequent steps are carried out, wherein at the second measuring device module ( 16 ) a, for this second measuring module module specific identifier ( 27 _T ) is attached or formed: C) carrying out a calibration of the second measuring module ( 16 ) and determining, to the second metering module ( 16 ) associated calibration data (K _T ); and D) storing the, to the second measuring module ( 16 ) associated calibration data (K _T ) together with the identifier ( 27 _T ) of the second measuring module ( 16 ) in the database system (DB). Method according to one of the preceding claims, characterized in that subsequent steps in the manufacture of the measuring device ( 2 ) from the at least one first measuring device module ( 4 ; 14 ) and the at least one second measuring device module ( 16 ) E) detecting the identifier ( 27 _P ; 27 _M ) of the first measuring module ( 4 ; 14 ) and reading from, to this identifier ( 27 _P ; 27 _M ) associated calibration data (K _P ; K _M ) from the database system (DB); F) Specific adaptation of the second measuring module ( 16 ) to the read calibration data (K _P , K _M ) of the first measuring module ( 4 ; 14 ). Method according to claim 3 or 4, characterized in that subsequent steps in the production of the measuring device ( 2 ) from the at least one first measuring device module ( 4 ; 14 ) and the at least one second measuring device module ( 16 ), whereby at the measuring device ( 2 ) one, for this measuring device ( 2 ) specific identifier ( 27 _G ) is attached or formed: G) detecting the identifiers ( 27 _P ; 27 _M , 27 _T ) of the first ( 4 ; 14 ) and the second (16) meter module and reading from, to these tags ( 27 _P ; 27 _M , 27 _T ) associated calibration data (K _P , K _M , K _T ) of the first ( 4 ; 14 ) and the second ( 16 ) Measurement module from the database system (DB); H) determining the calibration data (K _G ) of the measuring device ( 2 ) As a whole from the read-out calibration data (K _P K _M, K _T) of the first ( 4 ; 14 ) and the second ( 16 ) Measurement Module; and I) storing the, to this measuring device ( 2 ) as a whole associated calibration data (K _G ) together with the identifier ( 27 _G ) of this measuring device ( 2 ) in the database system (DB), wherein in the database system (DB) calibration data, each with associated identifiers for a plurality of measuring devices are centrally managed. Method according to one of the preceding claims, characterized in that subsequent steps in the manufacture of the measuring device ( 2 ) from the at least one first measuring device module ( 4 ; 14 ) and the at least one, second ( 16 ) Measuring module and / or after commissioning of the measuring device ( 2 ) are performed by a user, wherein at the measuring device ( 2 ) one, for this measuring device ( 2 ) specific identifier ( 27 _G ) is attached or designed: K) carrying out a calibration of the measuring device ( 2 ) as a whole and determining from, to this measuring device ( 2 as a whole, associated calibration data (K _G ); and L) storing the, to this measuring device ( 2 ) as a whole associated calibration data (K _G ) together with the identifier ( 27 _G ) of this measuring device ( 2 ) in the database system (DB), wherein in the database system (DB) calibration data, each with associated identifiers for a plurality of measuring devices are centrally managed. Method according to one of the preceding claims, characterized in that the first measuring device module ( 4 ; 14 ) by a primary sensor ( 4 ) or by a sensor ( 14 ) is formed. Method according to one of the preceding claims, characterized in that the first measuring device module ( 4 ; 14 ) forms a processorless unit. Method according to one of the preceding claims, characterized in that the second measuring device module ( 16 ) by a transmitter ( 16 ) is formed. Method according to one of the preceding claims, characterized in that the measuring device ( 2 ) by a temperature measuring device ( 2 ) is formed. Method according to one of the preceding claims, characterized in that the database system (DB) is designed such that manufacturer-independent by a respective manufacturer and / or by a user of a measuring device ( 2 ) indicating the respective identifier ( 27 _P ; 27 _M ; 27 _T ; 27 _G ) - calibration data (K _P ; K _M ; K _T ; K _G ) can be read out from the database system (DB); and / or - calibration data (K _P ; K _M ; K _T ; K _G ) can be written to the database system (DB). Method according to one of the preceding claims, characterized in that the identifier ( 27 _P ; 27 _M ; 27 _T ; 27 _G ) by an RFID identifier (RFID: radio-frequency identification), by a barcode, by a serial number, by a label, and / or by an optically detectable, unique embodiment of the object to be marked itself or part of it. Method according to one of the preceding claims, characterized in that the measuring device ( 2 ) a storage medium ( 20 ), in which the, to at least one measuring device module ( 4 ; 14 ; 16 ) of the measuring device ( 2 calibration data (K _P , K _M , K _T ) and / or to the measuring device ( 2 ) as a whole associated calibration data (K _G ), which were determined in each case at least one, made by the manufacturer calibration, are provided for reading. Calibration data management system comprising a plurality of first, separately calibratable meter modules ( 4 ; 14 ), each intended, in use, together with at least one second measuring module ( 16 ), which in each case to calibration data (K _P ; K _M ) of the associated first measuring module ( 4 ; 14 ), a measuring device ( 2 ) for determining a physical and / or chemical measured variable, and at each of which one, for the respective, first measuring device module ( 4 ; 14 ) specific identifier ( 27 _P ; 27 _M ) is mounted or formed, and a database system (DB), which is designed such that in this to the respective first measuring module (s) ( 4 ; 14 ) associated calibration data (K _P ; K _M ), at a, during the manufacture of the measuring device ( 2 ) calibration of the respective first measuring device modules ( 4 ; 14 ), together with the respectively associated specific identifier ( 27 _P ; 27 _M ) can be stored across manufacturers and from this under this specific identifier ( 27 _P ; 27 _M ) can be read by all manufacturers.

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