JP2001013001A - Electronic weighing apparatus with built-in weight - Google Patents

Electronic weighing apparatus with built-in weight

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Publication number
JP2001013001A
JP2001013001A JP11182924A JP18292499A JP2001013001A JP 2001013001 A JP2001013001 A JP 2001013001A JP 11182924 A JP11182924 A JP 11182924A JP 18292499 A JP18292499 A JP 18292499A JP 2001013001 A JP2001013001 A JP 2001013001A
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Prior art keywords
weight
calibration
internal
built
value
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Inventor
Yuji Fukami
Yoshikazu Nagane
雄二 深見
吉一 長根
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A & D Co Ltd
株式会社エー・アンド・デイ
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Priority to JP11182924A priority Critical patent/JP2001013001A/en
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Abstract

PROBLEM TO BE SOLVED: To improve reliability in calibration by a built-in weight by providing compatibility between the on-pan load of a weighing pan and a measured value of the built-in weight at each temperature. SOLUTION: When environment temperature at which an electronic weighing apparatus is disposed in changed by a predetermined amount, an external reference weight is placed on a weighing pan 1 at the temperature to calibrate the electronic weighing apparatus. In this state, a built-in weight receiving part 4 is loaded with a built-in weight 5 to obtain the measured value of the built-in weight 5. Temperature data and the measured value of the built-in weight 5 after calibration by the external reference weight at every temperature are stored in memory 15. In the case that calibration by the built-in weight 5 is necessary in measuring the load of an object to be weighed, the built-in weight receiving part 4 is loaded with the built-in weight 5 and temperature is measured by a temperature sensor 18 to perform calibration by the built-in weight 5 by the measured value of the built-in weight 5 stored in the memory 15.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は校正用の内蔵分銅を有する電子秤に係り、特に温度変化等、電子秤が配置されいている環境の物理量の変化に対てしも、内蔵分銅による校正を適正に行うようにした電子秤に関する。 The present invention relates to relates to an electronic balance having a built-in weight for calibration, especially temperature change, servants in pairs to a change in the physical quantity of the environment in which the electronic scale is not arranged, the calibration using the internal mass properly it relates to an electronic scale that was to be performed.

【0002】 [0002]

【従来の技術】電磁平衡式の電子天秤等、高い計量精度を有する電子秤においてはその精度を保持するため、秤量装置内に校正用の分銅が内蔵され、内蔵分銅を荷重測定機構に加除する内蔵分銅加除機構が設けられ、装置使用者が適宜に、或いは一定量の温度変化により自動的に、内蔵分銅を用いて校正を行うように構成されているものが多い。 BACKGROUND OF THE INVENTION electronic balance of the electromagnetic equilibrium type or the like, for holding its accuracy in an electronic scale with a high metering accuracy, weight for calibration is built into the weighing device, for insertion and deletion internal weight on the load measuring mechanism internal weight insertion and deletion mechanism is provided, the user of the apparatus appropriately or automatically, what often is configured to perform the calibration using the built-in weight by a certain amount of temperature change.

【0003】上記の内蔵分銅を有する電子秤においては、正確な質量が判明している外部基準分銅を秤量皿に載置し、この状態で先ず校正を行い、校正された秤量装置により自己の内蔵分銅を荷重測定機構に負荷してこれを計量し、かつこの計量値を記憶しておくように構成された秤量装置が提案されている。 [0003] In the electronic scale having the above built-in weight, by placing the external reference weight exact mass has been found to weighing dish, performs first calibration in this state, its internal by calibrated weighing device weigh this by loading the load measuring mechanism, and configured weighing device as storing the metric value is proposed weight. この装置によれば、予め外部基準分銅で校正された状態で内蔵分銅の計量を行い、この計量値を基準として以後内蔵分銅による校正を行うため、計量値さえ正確に得られれば、当該内蔵分銅の質量を一定の値に正確に調整しておく必要がなくなり、粗調整の内蔵分銅の使用が可能となって、コスト的に有利となるという利点がある。 This apparatus performs metering incorporated weight in a state of being calibrated in advance the external reference weight, in order to perform calibration by subsequent internal weight the weight value as a reference, as long precisely obtained even weighing, the incorporated weight It eliminates the mass necessary to precisely adjust the constant value, making it possible to use the built-in weight of the coarse adjustment, there is an advantage that a cost advantage.

【0004】 [0004]

【発明が解決しようとする課題】図7は内蔵分銅を有する電磁平衡式の電子秤(電子天秤)の構成例を示す。 Figure 7 [SUMMARY OF THE INVENTION] shows an example of the configuration of the electronic balance of the electromagnetic equilibrium type having a built-in weight (electronic balance). 周知のように電子天秤では、秤量皿1に負荷された秤量物の荷重は梃子の原理を応用した荷重伝達機構を介して電磁部3に伝達され、かつ秤量物の負荷に伴って変位しようとする電磁部に対してこれと平衡させる力を生じさせるフィードバック回路に出力される電気量から秤量物の荷重を算出する構成となっている。 An electronic balance, as well known, the load of the loaded weighed materials to weighing pan 1 is transmitted to the electromagnetic portion 3 via the load transmission mechanism that applies the principle of leverage, and tends to be displaced along with the load of the weighed materials and and has a configuration of calculating the load weighed materials from the quantity of electricity is output to the feedback circuit to generate a force to balance the other hand electromagnetic unit to.

【0005】一方、内蔵分銅5は図示しない内蔵分銅加除機構により秤量皿1とは別の内蔵分銅受け部4に載置れる構成となっている。 On the other hand, internal weight 5 has a structure placed as to separate the internal weight receiving part 4 and the weighing pan 1 by internal weight insertion and deletion mechanism (not shown). この内蔵分銅受け部4はリンク機構を介して前記荷重伝達機構2と接続しているため、 Since the internal weight receiving part 4 is connected to the load transfer mechanism 2 via the link mechanism,
内蔵分銅受け部4に負荷された内蔵分銅5の荷重が前記電磁部3に伝達される構造となっている。 Load of the incorporated weight 5 that is loaded into the internal weight receiving portion 4 has a structure which is transmitted to the electromagnetic portion 3. 一方、外部基準分銅は当然のことながら秤量皿1に載置されることになる。 On the other hand, will be placed on the weighing pan 1 with an external standard weight is a matter of course. つまり、外部基準分銅の荷重伝達経路と内蔵分銅の荷重伝達経路が同一ではなく、電子天秤の実際上の使用においてはこのことが内蔵分銅による校正の信頼性を低下させる原因となっている。 In other words, load path of the internal mass with the load path of the external reference weight is not the same, this is causing to lower the reliability of the calibration using the internal mass in practical use of the electronic balance.

【0006】例えば、電子天秤内外の温度、湿度、気圧等の物理量の変化によって、秤量皿1から電磁部3に至る荷重の伝達機構、及び内蔵分銅受け部4から電磁部3 [0006] For example, electronic balance inside and outside temperature, humidity, the physical quantity of change in atmospheric pressure or the like, the electromagnetic unit 3 transmitting mechanism of the load, from weighing pan 1 to the electromagnetic unit 3, and the internal weight receiving part 4
に至る荷重の伝達機構はそれぞれの機構の構成に対応した変化が生じる。 Change transmission mechanism load corresponding to the configuration of each of the mechanisms leading to occur. これを、物理量として温度を、また変化を各部部材の線膨張率を例に説明すると、荷重伝達機構を構成する部材、及びこれらの部材の異なる構成の組み合わせによりそれぞれ構成された荷重伝達機構は、温度の変化に対してそれぞれ独自の線膨張率を有することになる。 This is the temperature as a physical quantity, also when explaining changes the linear expansion coefficient of each portion member as an example, members constituting the load transfer mechanism, and load transfer mechanism configured each by a combination of different configurations of these members, each will have its own linear expansion coefficient with respect to changes in temperature. つまり秤量皿1から電磁部3までの荷重伝達経路と、内蔵分銅受け部4から電磁部3までの荷重伝達経路とにおいては温度変化に伴い独自の線膨張率を示すため、外部基準分銅の計量値と内蔵分銅の計量値との互換性は外部基準分銅負荷時の温度下においてのみ成立するものであって、他の温度下での互換性は無いことになる。 That order to show the load transfer path from the weighing dish 1 to the electromagnetic unit 3, a unique linear expansion coefficient as the temperature change in the load transfer path from the internal weight receiving part 4 to the electromagnetic unit 3, measuring of the external reference weight compatibility with metric values ​​and internal mass has been made to hold only at a temperature in an external reference weight load, compatibility under other temperatures will be no. 即ち、外部基準分銅を用いて校正を行って内蔵分銅の計量値を記憶しても、結果的には外部基準分銅を用いた温度下以外では当該内蔵分銅による校正の信頼性が得られないことを意味する。 In other words, it is stored metric values ​​of internal weight make calibration with an external reference weight, consequently it is other than a temperature using an external calibration weight not reliable calibration by the internal weight is obtained in the It means. 以上、温度変化を例としたが内蔵分銅の磨耗、酸化等については上記温度や湿度等の物理量の変化の外、時間もパラメータとなる。 Above, wear of the but internal weight and example temperature change, outside the physical quantity of change in the temperature and humidity for oxidation or the like, time is also a parameter.

【0007】図8は外部基準分銅と内蔵分銅5との荷重負荷部分の相違を極力無くすように構成されている。 [0007] Figure 8 is configured so as to eliminate the difference in load bearing portion of the built-in weight 5 and the external calibration weight as much as possible. 即ち内蔵分銅5は、秤量皿1に載置された荷重を電磁部3 That internal weight 5, the electromagnetic unit 3 the placed load weighing dish 1
に伝達する機構の途中においてその荷重が加除される位置に配置されている。 The load in the middle of mechanism for transmitting is arranged at a position that is insertion and deletion on. このように構成すれば外部基準分銅の負荷と内蔵分銅の負荷による互換性はほぼ達成される。 Compatibility caused by the load of the load built-in weight of the external reference weight According to this structure is substantially achieved. しかし、この構成は内蔵分銅5を秤量皿1の直下に置く必要があり、内蔵分銅加除機構の組み込みが難しく、然も秤量装置全体が時代の要求に逆行する厚型の構成と成らざるを得ない。 However, this configuration should place the incorporated weight 5 immediately below the weighing dish 1, it is difficult to built-in internal weight insertion and deletion mechanism, resulting whole, weighing apparatus natural choice but the configuration of the thick retrograde to the request of the times Absent. また、一般的に図6の構成よりも内蔵分銅加除機構が複雑となるため、当該機構の信頼性も低下する傾向にある。 Also, generally for internal mass insertion and deletion mechanism than the configuration of FIG. 6 is complicated, it tends to decrease the reliability of the mechanism.

【0008】更に例えば秤量300kg等の大秤量の電子秤では梃子比を大きく設定するため図9のように一端に秤量皿1が位置する梃子6、および梃子6に連設しかつ電磁部3が接続する梃子7の如く多重梃子の構成が採用されている。 [0008] A further example lever 6, and a lever 6 One only consecutively electromagnetic unit 3 weighing one end dish 1 is located as shown in Figure 9 for an electron balance of the large weighing such weighing 300kg is set large leverage multiple leverage configured as a lever 7 for connecting is employed. 内蔵分銅5は例えば梃子7側に負荷される構成となっている。 Incorporated weight 5 has a structure which is loaded, for example, the lever 7 side. この構成の場合も前記図7の構成と同様、秤量皿1に負荷された荷重の伝達経路と内蔵分銅5の荷重の伝達経路とは相違し、前記と同様の問題が生じる。 Similarly to the configuration of FIG. 7 in this arrangement, is different from the transmission path of the load of the incorporated weight 5 and the transmission path of the load applied to the weighing pan 1, the same problem occurs. また、この構成では高い梃子比のため秤量皿1 Also, weighing dish 1 for high leverage in this configuration
の直下に内蔵分銅を配置しようとすると、当該電子秤の秤量に近い極めて大きな質量を有する内蔵分銅を必要とするため、現実的には実施は非常に困難である。 Try to put the internal mass directly under the, it requires a built-in weight with a very large mass near the weighing of the electronic scale, realistically carried out is very difficult.

【0009】 [0009]

【課題を解決するための手段】本発明は上述の問題点を解決べく構成されたものであり、内蔵分銅を有する電子秤であって、かつ秤量皿に負荷された荷重の伝達経路と内蔵分銅の荷重の伝達経路の少なくとも一部が相違するよう構成された電子秤において、温度の変化等の物理量の変化或いは時間的変化があっても、内蔵分銅による校正が適正に行えるよう構成した電子秤である。 The present invention SUMMARY OF] has been constructed Beku solve the problems described above, an electronic balance having a built-in weight, and the transmission path of the load on the weighing pan load internal weight at least in part in an electronic weigher is adapted to different, electronic balance even if the physical quantity of change or temporal change such as a change in temperature, the calibration using the internal mass is configured to perform properly the load transmission paths it is.

【0010】即ち本発明の電子秤では温度等の物理量の変化を計測する手段が設けられ、かつ予め設定された変化量毎に外部基準分銅により当該荷重測定機構を校正し、この校正された荷重測定機構により内蔵分銅の値を計量して記憶し、以後内蔵分銅による校正をこの記憶した内蔵分銅の値により行うようにした内蔵分銅を有する電子秤であって、電子秤周囲の物理量の変化を測定するセンサと、物理量の変化量が予め定められた値となった時に内蔵分銅加除機構を作動させる手段と、この時の物理量の計測値と内蔵分銅の計量値を記憶する手段と、当該物理量の計測値と内蔵分銅の計量値との相関を求めかつ記憶する手段とを有し、当該物理量の各計測値に対する内蔵分銅の計量値との相関がそれぞれ求められた後は、内蔵分銅による校 [0010] That is, in the electronic balance of the present invention is provided with means for measuring the change in physical quantity such as temperature, and calibrating the load measuring mechanism by an external calibration weight to a preset variation each, the calibrated load weigh the value of internal mass stored by the measurement mechanism, an electronic scale having a built-in weight in which the calibration by subsequent internal mass to perform the value of the internal weight that the storage, a change in the physical quantity of electronic scales around a sensor for measuring, means for actuating the internal mass insertion and deletion mechanism when the amount of change in the physical amount becomes a predetermined value, and means for storing the weight value of the internal mass and the measured value of the physical quantity at this time, the physical quantity the measurement value and means for the determined and stored correlation between metric of internal weight, after the correlation between the weight value of the internal weight for each measured value of the physical quantity obtained respectively, school using the internal mass 時に、当該校正時の物理量の計測値により前記相関を用いて内蔵分銅計量値を得、この値を用いて荷重測定機構の校正を行うよう構成した電子秤である。 Sometimes, to give the internal mass weighing by using the correlation with the measured value of the physical quantity at the time of the calibration, which is an electronic weigher configured to perform calibration of the load measuring mechanism by using this value.

【0011】 [0011]

【発明の実施の形態】電子秤が配置されている環境下の物理量(以下温度を例にする)を計測するセンサが配置され、温度の変化が予め定めた量、例えば2℃変化したならば、その温度下において、外部基準分銅により電子秤の校正を行う。 DETAILED DESCRIPTION OF THE INVENTION Electronic weigher (as an example the following temperature) physical quantity of an environment which is arranged a sensor for measuring is arranged to the amount change of the temperature is determined in advance, for example, if 2 ℃ changed , at that temperature under calibrate the electronic balance by external calibration weight. 外部基準分銅による校正が終了したならば内蔵分銅を内蔵分銅受け部に負荷して内蔵分銅の計量値を得て、この計量値を当該計測温度と対応して記憶する。 Was loaded onto internal weight receiving part internal weight if calibration by external standard weight is finished to obtain the weight value of built-in weight, and stores the metric values ​​in correspondence with the measured temperature.

【0012】上記の操作を各温度毎に行い、各温度に於いて外部基準分銅により校正が行われた状態における内蔵分銅の計量値を各々記憶しておく。 [0012] perform the above operation for each temperature, keep each store the weighing value of the built-in weight in a state where the calibration is performed by an external calibration weight at each temperature. 秤量物の荷重を計量するに当たっては先ず計量時に温度を計測し、この温度が既に外部基準分銅により校正を行った温度であるか否かを判断する。 When weighing the load of the weighed materials are firstly the temperature was measured at the time of weighing, it is determined whether or not the temperature is already the temperature was calibrated by the external standard weight. 外部基準分銅により校正を行った温度であれば荷重測定モードに入る。 If the temperature was calibrated by the external standard weight fall load measuring mode.

【0013】一方、前記計測温度が、外部基準分銅により校正を行った温度でない場合には、外部基準分銅による校正モードに入り、前述のとおり外部基準分銅により校正を行った状態で内蔵分銅の計量値を得て、当該計測温度と共にこの計量値を記憶する。 Meanwhile, the measurement temperature, if not temperature was calibrated by the external standard weight enters the calibration mode by external calibration weight, weighing internal weight while performing the calibration by an external standard weight as described above to obtain a value, and stores the metric values ​​together with the measured temperature. なお、外部基準分銅による校正は特定の温度に於ける校正が終了したならば基本的には当該温度で再度校正を行うことはないので、 Since calibration by external standard weight is not possible to perform calibration again in the temperature is basically if the at calibration to a particular temperature has been completed,
外部基準分銅による温度毎の校正のデータがそれぞれ記憶、蓄積されるに従って、外部基準分銅による校正モードに入る動作は生じなくなる。 Storing calibration data for each temperature by external calibration weight, respectively, in accordance with the accumulated operation will not occur to enter calibration mode by external calibration weight.

【0014】 [0014]

【実施例】以下本発明の実施例を図面を参考に具体的に説明する。 EXAMPLES The drawings Examples of the following present invention will be described with reference. 図1は本発明に係る電子秤であって、機構としての構成は内蔵分銅を有する従来の電子秤と同様の構成となっている。 Figure 1 is an electronic scale according to the present invention, the structure of the mechanism has the same configuration as conventional electronic balance having a built-in weight. また秤量物の荷重を計量する計量モードにおいては従来の装置と同様な動作を行う。 Also in the metering mode for metering the load of the weighed materials performs the same operation as the conventional device. 即ち、秤量皿1に負荷された秤量物荷重は電磁部或いはロードセル等の荷重センサ部10を介して荷重データとしてアナログ出力され、かつA/D変換部11においてA/D変換された後演算及び処理部12において当該秤量物の計量値として算出されかつ表示器13に表示される。 That is, weighed materials load applied to the weighing pan 1 is operational and after an analog output, and is A / D converted in A / D converter 11 as a load data via the load sensor unit 10 such as an electromagnetic unit or load cell in the processing unit 12 is calculated as a metric value of the weighed materials and is displayed on the display device 13.

【0015】一方、内蔵分銅5による校正動作も、キースイッチ部14等の外部入力手段を介して電子秤の使用者が適宜に、或いは一定の温度変化等により自動的に行われ、校正タイミングの設定も従来の装置と同様の設定とすることが可能である。 [0015] On the other hand, the calibration operation by the built-in weight 5, the user of the electronic balance through the external input means such as a key switch unit 14 is appropriately or automatically performed by the constant change in temperature or the like, the calibration timing also set may be a conventional device similar settings. 即ち本発明は内蔵分銅による校正タイミングにあるのではなく、内蔵分銅による校正時の校正の信頼性を高める点にある。 That is, the present invention is not in the calibration timing by internal mass lies in enhancing the calibration of reliability during calibration using the internal mass.

【0016】符号18は電子秤の配置されている環境における物理量としての温度を検出する温度センサであり、当該温度センサ18から出力された温度データは温度A/D変換部20を介して前記演算及び処理部12にデジタル出力される。 The reference numeral 18 denotes a temperature sensor for detecting the temperature of a physical quantity in an environment which is arranged in the electronic scale, temperature data output from the temperature sensor 18 is the operation through the temperature A / D converter 20 and it is digitally outputted to the processing section 12. なお図示の構成では物理量を温度とし、この温度を計測する温度センサ18を設けているが、この温度センサ18に代えて、またはこれに加えて湿度センサ、気圧センサ等他の物理量を計測するセンサを設けてもよい。 Note the temperature physical quantities in the configuration illustrated, is provided with the temperature sensor 18 for measuring the temperature, instead of the temperature sensor 18, or in addition to measuring the humidity sensor, other physical quantity such as pressure sensor Sensor the may be provided. 符号16はモータ駆動回路、17は内蔵分銅加除機構である。 Reference numeral 16 denotes a motor drive circuit, 17 is a built-in weight insertion and deletion mechanism. なお、電子秤は温度データによって感度を補正する機能が設けられているのが一般的であるので、感度補正用に予め温度センサが設けられている場合には、この温度センサの温度データを利用することが可能であるから、別途温度センサを設ける必要はない。 Since electronic balance is general that function to correct the sensitivity with temperature data is provided, if the provided pre temperature sensor for sensitivity correction, utilizing the temperature data of the temperature sensor since it is possible to, not necessary to provide a separate temperature sensor.

【0017】次に図2において本発明の基礎をなす温度と内蔵分銅の計量値との関係を試験した結果を示す。 [0017] Next, the results of relationships were tested with weighing of internal weight and temperature underlying the present invention in FIG. 試験に用いた電子秤は、図1に示すように内蔵分銅5の荷重が秤量皿1に負荷された荷重とは異なる経路を介して荷重センサ部10に出力される構成の電磁平衡式の電子天秤である。 Electronic balance was used to test an electronic electromagnetic equilibrium type of structure to be output to the load sensor unit 10 via a path different from the load in which the load of the incorporated weight 5 is loaded on the weighing pan 1 as shown in FIG. 1 it is a balance. この電子天秤が配置されている室内においては図の左側の線図に示されるように電子天秤使用時間帯である午前9時から午後6時までの間に温度が約12 Temperature until 6 pm 9:00 am is an electronic balance using time slot as shown in the diagram on the left side of the figure in a room where the electronic balance is disposed approximately 12
℃から約25℃まで変化している。 It has changed to about 25 ℃ from ℃. この温度変化において例えば2℃温度変化する毎に内蔵分銅の荷重を計量した結果が右の線図である。 The temperature in the variation example 2 ℃ temperature change results of weighing the load of the incorporated weight every time is a diagram of a right. この線図において、温度が1 In this diagram, the temperature is 1
2℃の時の内蔵分銅の計量値は99.9999gであり、かつ25℃において100.0001gであった。 Weighing value of built-in weight when the 2 ℃ is 99.9999G, and was 100.0001g at 25 ° C..

【0018】上記温度変化に対する内蔵分銅の計量値の変化は内蔵分銅の荷重の伝達経路の僅かな伸縮(正負の線膨張)等に起因するものと思われるが、何れにしてもこの内蔵分銅の計量値の変化は秤量皿1に負荷された荷重(皿上荷重)の計量値の変化とは異なり、従って所定の温度変化に対応した内蔵分銅の計量値の変化と当該所定の温度変化に対応した皿上荷重の変化との間には互換性がない。 [0018] While change in the weight value of the incorporated weight to said temperature change is believed to be due to a slight stretching (positive and negative linear expansion), and the transmission path of the load of the incorporated weight, in any of the incorporated weight change in the weight value is different from the change in the weight value of the load applied to the weighing pan 1 (dish on load), thus corresponding to the change and the predetermined temperature change in the weight value of the internal weight corresponding to a predetermined temperature change incompatibility between the the change in the dish on the load. なお以後「互換性」の語は、同じ質量の対象物を秤量皿に負荷した場合と、内蔵分銅受け部に負荷した場合に、温度がどのように変化しても、同じ温度下においては同じ計量値を出力する関係にあることを意味する語として使用する。 Incidentally term hereinafter "Compatibility" includes a case where the load on the weighing pan an object of the same mass, when loaded into the internal weight receiving part, be varied how temperature, the same in the same temperature under used as a word means that a relationship of outputting the weight value.

【0019】次に本実施例の電子秤の作動状態の一例を主として図3乃至図5を用いて説明する。 [0019] Next, an example of the operating state of the electronic balance of the present embodiment will be described mainly with reference to FIGS. 先ず図3に於けるフローは、電子秤が使用の浅い装置または購入後未使用の装置を使用することを前提としている。 First in the flow in FIG. 3 assumes that the electronic scale used shallow device or unused devices after purchase of use. なお電子秤の配置された環境下における計測対象である物理量として温度をその計測対象としている。 Note that as its measurement object temperature as a physical quantity to be measured in placed environment of electronic scales.

【0020】電子秤を作動させると、先ず温度センサ1 [0020] actuating the electronic scale, first temperature sensor 1
8が温度T 1を計測し(S1)、この温度T 1が既に外部基準分銅を用いて電子秤の校正を終了した温度であるか否かを判断する(S2)。 8 measures the temperature T 1 of (S1), the temperature T 1 is judged already whether the temperature has been completed the calibration of the electronic balance using an external calibration weight (S2). なお、計測温度T 1 、T 2 The measurement temperature T 1, T 2
・・・・は、例えば16℃、18℃、20℃・・等2℃ ... is, for example, 16 ℃, 18 ℃, 20 ℃ ·· such as 2 ℃
毎にチェックするよう予め設定しておく。 Set in advance to check for each. この計測温度T 1が既に外部基準分銅による校正が終わって、当該温度T 1の内蔵分銅の計量値が記憶されている温度であれば、この温度T 1を計測温度Taとして(S11)、通常の秤量物を計量する計量モードに入る。 The measured temperature T 1 is already finished calibration with an external reference weight, as long as the temperature at which the weight value of the built-in weight of the temperature T 1 is stored, (S11) the temperature T 1 of the measured temperature Ta, the normal enter the weighed materials to the weighing mode for weighing.

【0021】一方当該計測温度T 1が外部基準分銅による校正が終わっていない温度である場合には警告(S Meanwhile warning if the measured temperature T 1 is a temperature that is not finished calibration by external standard weight (S
3)を発して当該電子秤が外部基準分銅による校正モードに入ること、即ち通常の秤量物の計量ができないことを知らせる。 3) emit that the electronic scale enters calibration mode by external calibration weight, indicating that the words can not be weighed in the normal weighing thereof. 因みに全く未使用の電子秤の場合には、外部基準分銅による校正が全く実施されていないのであるから、必ずこの警告が発せられることになる。 Incidentally if completely electronic scales unused, since calibration by external standard weight it is not been carried out at all, so that always the warning is issued. 外部基準分銅校正モード(S4)に入ったならば、当該電子秤の秤量皿に例えば100.0000gの質量を有する外部基準分銅負荷し(S5)、この状態で外部基準分銅による電子秤の校正を行う(S6)。 Once entered the external reference weight calibration mode (S4), the electronic scales weighing dish, for example, to an external standard weight load has a mass of 100.0000g (S5), the calibration of the electronic balance with an external standard weight in this state performed (S6).

【0022】上記外部基準分銅による校正が終了したならば内蔵分銅加除機構7を作動させて内蔵分銅5を内蔵分銅受け部4に負荷し(S7)、当該内蔵分銅5を計量し、この内蔵分銅5の計量値W 1をメモリ15に記憶する(S8)。 [0022] The external calibration weight by the calibration actuates the internal weight insertion and deletion mechanism 7 Once completed loaded with internal weight 5 to the internal weight receiving portion 4 (S7), and metering the internal weight 5, the internal weight weighing value W 1 of 5 is stored in the memory 15 (S8). この段階で再度温度センサ18により温度T 2を計測し(S9/図4)、この温度T 2が前記計測温度T 1に対して予め設定した温度変化量TS(例えば2℃)以上変化したか否かを判断する(S10)。 The temperature T 2 is measured by the temperature sensor 18 again in this stage (S9 / 4), or the temperature T 2 is changed the measured temperature temperature variation TS previously set with respect to T 1 (e.g. 2 ° C.) or higher determines whether (S10). 例えば計測温度T 1が18℃で、計測温度T 2が20℃である場合等である。 For example the measured temperature T 1 is at 18 ° C., is like when the measured temperature T 2 is 20 ° C.. この場合、変化が設定値TS以上であればステップ(S2)に戻り、当該温度T 2に基づいて外部基準分銅による校正の要否を判断し、必要であれば上述の各ステップにより外部基準分銅による校正と、内蔵分銅の計量値の取込みを行う。 In this case, return to if the set value changes TS above step (S2), to determine the necessity of calibration by external calibration weight on the basis of the temperature T 2, the external reference weight by the steps described above, if necessary and calibration by the incorporation of weighing the internal weight carried.

【0023】上記各ステップを、異なる計測温度毎に繰り返すことにより各計測温度T 1 〜T nに対応して外部基準分銅により校正を行い、かつ当該温度T 1 〜T nに対応する内蔵分銅の計量値W 1 〜W nを記憶する(S1 [0023] The above each step, different to perform calibration by an external standard weight corresponding to each measured temperature T 1 through T n by repeating it every measurement temperature, and the internal weight corresponding to the temperature T 1 through T n to store the weighing value W 1 ~W n (S1
2)。 2). この内蔵分銅の計量値の記憶はそれぞれの温度に対して外部基準分銅の校正を一回行うだけであるので、 Since storage of the weighing value of the built-in weight is only performed once the calibration of the external standard weight for each temperature,
電子秤の使用時間が増えるに従って外部基準分銅を用いた校正モードに入る事態は急速に減少し、各温度における内蔵分銅の計量値の記憶が終了すれば外部基準分銅による校正モードに入ることは無くなり、以後は後述の如く内蔵分銅による校正モードで適正な校正が可能となる。 Situation entering the calibration mode using an external calibration weight according to use time of the electronic balance increases decreases rapidly, that the storage of the weighing of the incorporated weight at each temperature enters the calibration mode by external standard weight when finished disappears , after that it is possible to properly calibrate the calibration mode using the internal mass as will be described later.

【0024】次に、通常の荷重計量モードに入る(S1 Next, enter the normal load weighing mode (S1
3)。 3). この際温度センサ18により温度Taを計測し(S14)し、かつこの計測温度Taは既に外部基準分銅による校正が終わった温度であるかを再度判断する(S15)。 In this case the temperature Ta measured by the temperature sensor 18 (S14), and the measured temperature Ta is already determined whether the temperature has ceased calibration with an external reference weight again (S15). これは、通常の荷重計測モードにおいて計測温度が大きく変化した場合に、当該計測温度に対する外部基準分銅による校正がなされていないにも係わらず内蔵分銅による校正が行われてしまう可能性があるからである。 In this, if the measured temperature in the normal load measuring mode changes greatly, because the calibration using the internal mass despite calibration with external standard weight has not been made with respect to the measured temperature there is a possibility that taking place is there. たとえば夏場、今までは冷房した環境下で電子秤が使用されていたのに、何らかの理由により冷房が停止し、室内温度が温度センサ18により計測し、かつ外部基準分銅による校正を行った温度のうちの最高温度を越えてしまった場合等が考えられる。 For example summer, for now until the electronic scale in an environment that cooling had been used, the cooling is stopped for some reason, measured by the indoor temperature is a temperature sensor 18, and the temperature was calibrated with an external standard weight or when the inner've exceeded the maximum temperature of it can be considered. 従って、通常の荷重計量モードに於ける計測温度Taに対してS15で示すステップを設けておけば、当該計測温度Taにおける外部基準分銅による校正が未了であることが警告され(S3)、装置としての信頼性をより高めることができる。 Therefore, if provided with a step shown in S15 in the normal load measuring mode for at measurement temperature Ta, it calibrated by external standard weight at the measured temperature Ta is not complete is warned (S3), device reliability as can be more enhanced.

【0025】更に当該計測温度Taが外部基準分銅による校正が終了している温度である場合には、前回計測温度T(a−1)に対する当該計測温度Taの変化量が予め定められた値TS(例えば2℃)を越えているか否かを判断し(S16/図5)、越えてない場合には秤量物を秤量皿1に載置し、計量を行い(S24)、この計量結果を表示する(S25)。 Furthermore the measured temperature when Ta is the temperature at which calibration by the external standard weight has ended, the value TS of the variation of the measured temperature Ta with respect to the previous measured temperature T (a-1) is predetermined (e.g., 2 ° C.) to determine whether it exceeds the (S16 / 5), in the case when it does not exceed placing the weighed materials to weighing pan 1, weighing was carried out (S24), displays the weighing result to (S25).

【0026】一方計測温度Taの変化量が予め定められた値TSを越えている場合には警告を発し(S17)、 On the other hand it warns if the amount of change in the measured temperature Ta exceeds a predetermined value TS (S17),
内蔵分銅校正モードに入る(S18)。 Enter the built-in weight calibration mode (S18). この状態でモータ駆動回路16を介して内蔵分銅加除機構17が作動し、内蔵分銅5を内蔵分銅受け部14に負荷して(S1 The state internal mass insertion and deletion mechanism 17 via the motor drive circuit 16 is operated, with the load of the incorporated weight 5 to the internal mass receiving section 14 (S1
9)内蔵分銅5による電子秤の校正が行われる。 9) calibration of electronic scales by the built-in weight 5 is performed. これより内蔵分銅5の計量値Wa´を得る(S20)。 From this is obtained a weighing Wa' the incorporated weight 5 (S20). 次にメモリ15に記憶されている当該計測温度Taに対応する内蔵分銅5の計量値Waを選択し(S21)、この選択した計量値Waにより電子秤を校正する。 Then select the weight value Wa of the incorporated weight 5 corresponding to the measured temperature Ta stored in the memory 15 (S21), calibrating the electronic balance The selected weight value Wa. これにより異なる荷重伝達経路を有する内蔵分銅5による校正であるが、当該温度Taに於ける皿上荷重と互換性を持って内蔵分銅5による校正が行える。 Although this way is calibrated using the internal mass 5 having different load path, perform calibration using the internal mass 5 have in pan on load and compatible to the temperature Ta. 校正終了後(S23)は秤量皿1に秤量物を載置して計量を行う(S24、S2 After completion of calibration (S23) performs the metering and placing the weighed materials to weighing dish 1 (S24, S2
5)。 5). なお、電子秤の使用を重ねる毎に、より幅広い温度における外部基準分銅の校正が完了するため、電子秤を一定期間使用した後は、殆どの場合(S1)から直接に通常荷重計量モード(S13からS25)に入り、この荷重計量モードだけが作動することになって、外部基準分銅載置の煩わしさは無くなる。 Incidentally, each overlaying the use of electronic scales, for calibrating the external reference weight is completed at a wider temperature, after a certain period of time using an electronic balance directly to the normal load weighing mode from most cases (S1) (S13 enters from S25), only the load metering mode is supposed to operate, eliminates the hassle of external reference weight placed.

【0027】図6は他の作動状態を示す。 [0027] Figure 6 shows another operating state. 電子秤を作動させると、先ず温度センサ18が温度Txを計測する(SA1)。 Operating the electronic scale, first temperature sensor 18 measures the temperature Tx (SA1). この温度Txは前記温度T 1 〜T nの何れかであり、この温度Txが外部基準分銅を用いて既に電子秤の校正を終了した温度であるか否かを判断し(SA The temperature Tx is either the temperature T 1 through T n, it is determined whether the temperature Tx is a temperature which has already completed the calibration of the electronic balance using an external calibration weight (SA
2)、既に測定された温度である場合には前述の荷重計量モードに入り計量値を表示する(SA10)。 2). If the temperature is already measured for displaying the weight value enters the above load weighing mode (SA10).

【0028】一方校正を終了していない温度である場合には警告が発せられて(SA3)、電子秤が外部基準分銅による校正モードに入ること、即ち通常の計量作業において、内蔵分銅を用いた校正を行っても正しい計量表示とならないことを警告する。 On the other hand a warning is issued when the temperature has not been completed calibration (SA3), the electronic scale enters calibration mode by external calibration weight, i.e. in normal weighing operation, with internal weight warning that even if the calibration does not correct the weighing display. 電子秤の使用条件によっては警告を無視して計量値を得たい場合もあるので、電子秤使用者は警告が発せられた段階で当該警告に従って外部基準分銅による校正モードに電子秤が入るか否かを判断する(SA4)。 Since the conditions of use of the electronic scale may wish to obtain a weight value to ignore the warning, whether electronic scales user is electronic scale entering the calibration mode by external standard weight in accordance with the alerts at the stage where a warning is issued or the judges (SA4).

【0029】外部基準分銅による校正モード(SA5) [0029] The calibration mode by an external reference weight (SA5)
に入ったならば、電子秤の秤量皿に例えば100.00 If you went to, for example, in the weighing dish of electronic scales 100.00
00gの質量を有する外部基準分銅を負荷し(SA Loaded with external calibration weight having a mass of 200 g (SA
6)、この状態で電子秤の荷重計量機構の校正を行う(SA7)。 6), to calibrate the electronic balance of the load weighing mechanism in this state (SA7). この校正が終了したならば内蔵分銅を当該荷重計量機構に負荷し(SA8)、当該内蔵分銅を計量して温度Txのときの内蔵分銅値Wx(x=1〜n)を記憶する。 Internal weight if the calibration has been completed and loaded into the load metering mechanism (SA8), and weighed the internal weight storing internal weight value Wx (x = 1~n) at the temperature Tx. また外部基準分銅校正モードが終了すると電子秤は通常の計量モードに復帰し計量値を表示する(S The electronic balance the external reference weight calibration mode is terminated to return to the normal weighing mode and displays the weight value (S
A10)。 A10).

【0030】上記各実施例では、電子秤周囲の物理量として温度を例に説明したが、温度に代えて、或いはこれに加えて湿度、気圧等の他の物理量を計測したり、或いは磨耗や酸化を考慮して校正のパラメータとして時間を入れてもよい。 The above embodiments have been described temperature as an example as a physical quantity of electronic scales around, instead of the temperature, or or measuring humidity, the other physical quantity such as pressure in addition to this, or wear and oxidation it may be put in the time as a parameter of the calibration taking into account the. 但し経時的変化のみでは適正な校正タイミングを得る事は困難であるので、前記物理量の変化と併用し、これら物理量の変化に対応した校正データの取込み完了後も、例えば一ヶ月毎に警告を発して外部基準分銅による校正を指示し、外部基準分銅における校正時の温度と、校正後のこの温度下における内蔵分銅の計量値が、前回の校正における同一の温度下における内蔵分銅の計量値と一致しているか否かを判断する。 However, since the only variation with time which it is difficult to obtain a proper calibration timing, in combination with changes in the physical quantity, even after the retrieval completion of calibration data corresponding to a change in these quantities, for example, alerts per month instructs calibration by external standard weight Te, and the calibration temperature in the external standard weight, the weight value of the incorporated weight in the temperature of post-calibration, the weighing value of the built-in weight under the same temperature in the previous calibration one It determines whether the match. もし不一致の場合には磨耗、酸化等により秤量皿側の荷重伝達系と内蔵分銅側の荷重伝達系との互換性が崩れている可能性があるので、例えば、各温度における外部基準分銅による校正を再度行うことにより経時的変化に対応し、内蔵分銅による校正の信頼性を保持する。 If wear in the case of disagreement, the compatibility with the load transfer system of the incorporated weight side and the load transfer system of the weighing dish side by oxidation or the like is likely to have collapsed, for example, calibration by the external standard weight at each temperature response to changes over time by performing again, retaining the calibration of reliability due to internal weight.

【0031】また、校正のパラメータとしての時間を含めた場合と、含めない場合の何れにおいても、電子秤周囲の物理量と内蔵分銅の測定値との関係が予め求められていれば、この関係が成立する値を補正値として内蔵分銅の測定値を補正することにより、実際に外部基準分銅を使用することなく適正な校正を行うことが期待できる。 Further, the case of including the time of the calibration parameters, in any case not including, if the relationship between the physical quantity of electronic scales around the measured value of the internal weight is determined in advance, this relationship by correcting the measured value of the internal weight values ​​established as a correction value, it can be expected to perform appropriate calibration without actually using the external reference weight.

【0032】 [0032]

【発明の効果】本発明は上記実施例により説明したように、温度等の物理量の変化に対応して外部基準分銅により電子秤を校正した後に内蔵分銅による計量値を当該物理量と共に記憶しているので、以後内蔵分銅による校正を行う場合、内蔵分銅の荷重伝達経路と秤量皿の荷重の伝達経路が相違していても各荷重伝達経路の互換性が保持され、この結果内蔵分銅による校正によって皿上荷重に対する校正を正確に行うことが可能となる。 According to the present invention stores as explained by the above examples, the weight value with internal weight after calibrating the electronic balance by external standard weight in response to changes in a physical quantity such as temperature together with the physical quantity because, when performing calibration using subsequent internal weight, compatibility of the load transmission path with weighing dish load transmission path differences to be in the load path of the built-in weight is retained, the dish by calibration with a result internal weight it is possible to perform the calibration with respect to the upper load accurately.

【0033】また秤量皿の直下に内蔵分銅を配置する必要が無いため、内蔵分銅加除機構の設計の自由度が高くしかも電子秤全体を時代の要請に対応する薄型の小型のものに形成でき、また複数の梃子を有する荷重伝達機構でも秤量に対して質量の小さい内蔵分銅で適正な校正が実施可能となる。 [0033] In addition, since there is no need to place the built-in weight to just below the weighing dish, can be formed to those of the thin small corresponding to the degree of freedom is high and yet the demands of the times the entire electronic scale of the design of the built-in weight insertion and deletion mechanism, the proper calibration is feasible in small built-in weight of the mass relative to the weighing in the load transfer mechanism having a plurality of lever.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の構成例を示す電子秤のブロック図である。 1 is a block diagram of an electronic scale showing a configuration example of the present invention.

【図2】温度変化と内蔵分銅計量値の変化との関連を示す線図である。 2 is a diagram showing the relationship between a change in temperature changes the internal mass weighing.

【図3】本発明の電子秤の作動状態の一例を示すフロー図の一部である。 Figure 3 is a part of a flow diagram showing an example of the operation state of the electronic balance of the present invention.

【図4】図3に連続するフロー図の一部である。 4 is a part of a flowchart for continuous in FIG.

【図5】図4に連続するフロー図の一部である。 Figure 5 is a part of a flowchart for continuous in FIG.

【図6】本発明の電子秤の作動状態の他の例を示すフロー図である。 6 is a flowchart showing another example of the operating state of the electronic balance of the present invention.

【図7】秤量皿からの荷重伝達経路と内蔵分銅受け部からの荷重伝達経路が異なる構成の電子秤の概略図である。 [7] load transmission path from the load path and internal mass receiving section of the weighing dish is a schematic diagram of an electronic scale having a different configuration.

【図8】秤量皿からの荷重伝達経路と内蔵分銅受け部からの荷重伝達経路がほぼ等しい構成の電子秤の概略図である。 8 is a schematic diagram of an electronic balance of the load transmission path is substantially equal configuration from the built-in weight receiving part load path from the weighing dish.

【図9】荷重伝達機構が二重梃子となっている電子秤の概略図である。 9 is a schematic diagram of an electronic weigher load transfer mechanism is a double lever.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 秤量皿 2 荷重伝達機構 3 電磁部 4 内蔵分銅受け部 5 内蔵分銅 16 モータ駆動回路 17 内蔵分銅加除機構 1 weighing pan 2 load transmitting mechanism 3 electromagnetic unit 4 incorporated weight receiving portion 5 the internal mass 16 motor drive circuit 17 internal mass insertion and deletion mechanism

Claims (5)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 内蔵分銅と、この内蔵分銅を荷重測定機構に加除する内蔵分銅加除機構とが設けられ、外部基準分銅により当該荷重測定機構を校正し、かつ校正された荷重測定機構により内蔵分銅の値を計量して記憶し、以後内蔵分銅による校正をこの記憶した内蔵分銅の計量値により行うようにした内蔵分銅を有する電子秤において、電子秤の配置された環境における温度等の物理量の変化を計測するセンサと、当該センサにより計測された物理量が外部基準分銅を用いた校正を行う温度であるか否かを判断する手段と、予め定められた物理量において外部基準分銅を用いた校正の後に計量した内蔵分銅の計量値を当該計測物理量と共にそれぞれ記憶する手段とを有し、内蔵分銅による校正を行うときに外部基準分銅による校正後に計量しか And 1. A built-in weight, and internal mass insertion and deletion mechanism is provided for insertion and deletion of this built-in weight on the load measuring mechanism, the internal mass by calibrating the load measuring mechanism by external calibration weight, and calibrated load measurement mechanism storing the value weighed by an electronic balance having a built-in weight in which the calibration by subsequent internal mass to perform the weighing value of internal weight that the storage, the change in physical quantity such as temperature in the arrangement environment of electronic scales a sensor for measuring and means for physical quantity measured by the sensor to determine whether the temperature to be calibrated using an external calibration weight, after calibration with an external reference weight in the predetermined physical quantity the weight value weighed internal weight and means for storing each together with the measuring physical quantity, only weighed after calibration by an external standard weight when performing calibration using the internal mass つ記憶された内蔵分銅の計量値のうち当該物理量の計測値に対応する値を用いて当該内蔵分銅による荷重測定機構の校正を行うよう構成したことを特徴とする内蔵分銅を有する電子秤。 Electronic scales with internal weight by using a value corresponding to the measured value of the physical quantity of the stored weight value incorporated weight is characterized by being configured to perform calibration of the load measuring mechanism by the internal weight One.
  2. 【請求項2】 内蔵分銅を自動的に荷重測定機構に加除する内蔵分銅加除機構が設けられ、計測された前記物理量の変化量が予め定められた値となった時に当該内蔵分銅加除機構を作動させて内蔵分銅による校正を行うよう構成され、計測した物理量によって内蔵分銅による校正が必要であると判断されたときに当該内蔵分銅を荷重測定機構に自動的に負荷して校正を行うよう構成したことを特徴とする請求項1記載の内蔵分銅を有する電子秤。 2. A built-in weight automatically internal weight insertion and deletion mechanism for insertion and deletion in the load measuring mechanism is provided to, actuating the internal mass insertion and deletion mechanism when the amount of change measured the physical quantity becomes a predetermined value is configured to cause performing calibration using the internal mass with the, and configured to perform automatic load to calibrate the internal weight when the calibration using the internal mass is determined to be required by the measured physical quantity to the load measuring mechanism electronic scales with internal weight according to claim 1, wherein a.
  3. 【請求項3】 秤量皿に載置された秤量物の荷重を計量する時に温度等の物理量が計測され、かつこの物理量の値が既に外部基準分銅による校正と当該校正後の内蔵分銅の計量値を記憶したときの値であるか否かを判断する手段を有することを特徴とする請求項1又は2記載の内蔵分銅を有する電子秤。 3. A physical quantity, such as temperature at the time of weighing the load of the placed weighed materials to weighing dish is measured, and the weighing value of the built-in weight after calibration and the calibration value of the physical quantity due to already external calibration weight electronic scales with internal weight according to claim 1 or 2, characterized in that it comprises means for determining whether the value when stored.
  4. 【請求項4】 前記物理量を計測する手段に加えて、時間を計測する手段が設けられ、最後に内蔵分銅の計量値を記憶したときから一定時間経過後に再度外部基準分銅による校正を行うよう指令を発する手段が設けられ、かつ当該指令による外部基準分銅を用いた校正後に内蔵分銅を負荷したときの当該内蔵分銅の計量値と、当該内蔵分銅計量時の物理量の計測値とを記憶する手段とを有し、更にこの計測物理量に対応する内蔵分銅の計量値と、この計測物理量と同じ計測物理量下において前回の外部基準分銅による校正後に計量された内蔵分銅の計量値とを比較する手段を有し、同一物理量下における前回の内蔵分銅計量値と今回の内蔵分銅計量値とが予め定められた値以上に相違している時は、当該物理量に対応する内蔵分銅計量値として 4. In addition to the means for measuring the physical quantity, is provided with means for measuring time, it commanded to perform calibration by re external calibration weight after a predetermined time has elapsed from the time of storing the weight value of the last internal weight a metering value of the internal weight when loaded with internal weight after calibration using an external reference weight by means are provided, and the instruction to emit, and means for storing the measured value of the physical quantity at the time of the internal mass weighing It has a further organic and weighing the internal weight for this measurement physical quantity, means for comparing the metric value of the internal weight which is weighed after calibration with the previous external standard weight at the same measuring physical quantity under this measure physical quantity and, when the the internal mass weighing value and the current of the built-in weight measuring value of the previous are different than a predetermined value under the same physical quantity as internal weight metric values ​​corresponding to the physical quantity 今回の計量値を採用することにより秤量皿からの荷重伝達機構と内蔵分銅の荷重伝達機構との互換性を再度保持するよう構成したことを特徴とする請求項1乃至3の何れかに記載の内蔵分銅を有する電子秤。 According to any one of claims 1 to 3, characterized by being configured so as to maintain compatibility with the load transfer mechanism of the built-in weight and load transfer mechanism from the weighing pan again by adopting the current metric electronic scales with a built-in weight.
  5. 【請求項5】 前記計測対象の物理量は温度であることを特徴とする請求項1乃至4の何れかに記載の内蔵分銅を有する電子秤。 5. An electronic scale having a built-in weight according to any one of claims 1 to 4, characterized in that the physical quantity of the measurement target is temperature.
JP11182924A 1999-06-29 1999-06-29 Electronic weighing apparatus with built-in weight Pending JP2001013001A (en)

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