JP2822671B2 - Electronic balance - Google Patents
Electronic balanceInfo
- Publication number
- JP2822671B2 JP2822671B2 JP40571790A JP40571790A JP2822671B2 JP 2822671 B2 JP2822671 B2 JP 2822671B2 JP 40571790 A JP40571790 A JP 40571790A JP 40571790 A JP40571790 A JP 40571790A JP 2822671 B2 JP2822671 B2 JP 2822671B2
- Authority
- JP
- Japan
- Prior art keywords
- weighing chamber
- door
- temperature
- weighing
- closing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】 本発明はひょう量室を備えた電
子天びん関し、更に詳しくは、第１ひょう量室内に第２
ひょう量室が設けられ、その第２ひょう量室内に天びん
皿が設けられているタイプの電子天びんに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic balance having a weighing chamber, and more particularly, to a second weighing chamber having a second weighing chamber.
The present invention relates to an electronic balance of a type in which a weighing chamber is provided and a balance plate is provided in the second weighing chamber.
【０００２】[0002]
【従来の技術】 ミクロ天びん等の読み取り限度の小さ
い電子天びんでは、計量値が風の影響や対流の影響等を
受けることを防止するため、天びん皿の回りを２重に囲
み、それぞれに設けられた扉の開閉により被測定試料の
出し入れを行う等の対策が採られている。2. Description of the Related Art In electronic balances, such as micro balances, having a small reading limit, in order to prevent weighing values from being affected by wind, convection, etc., the balance is double-wrapped around a balance plate, and is provided for each. Countermeasures are taken such as opening and closing the door to take in and out the sample to be measured.
【０００３】[0003]
【発明が解決しようとする課題】 ところで、上述のよ
うに皿の回りを単に２重に囲む構造の天びんにおいて
は、内・外の扉を閉じた状態において外側と内側の壁体
の空気による保温効果により、皿の回りの温度が天びん
の周囲温度に対して大きく遅れて変化するという欠点が
ある。このことは、天びんの使用に際して内側の扉を開
けたときから、皿の回りの温度が急激に周囲温度に近づ
く結果となり、天びんの使用開始時にドリフトや対流を
生じてしまい、測定結果に悪影響を及ぼすという欠点が
ある。By the way, in a balance having a structure in which the periphery of the dish is simply double-wrapped as described above, the inner and outer walls are kept warm by the air when the inner and outer doors are closed. Due to the effect, there is the disadvantage that the temperature around the pan changes significantly later than the ambient temperature of the balance. This means that the temperature around the pan suddenly approaches the ambient temperature after opening the inner door when using the balance, causing drift and convection at the start of use of the balance, adversely affecting the measurement results. There is a drawback that it does.
【０００４】本発明の目的は、皿の回りを２重に囲んだ
天びんにおける上記の欠点を解消することにある。[0004] It is an object of the present invention to overcome the above-mentioned drawbacks of a double-balanced balance around a dish.
【０００５】[0005]
【課題を解決するための手段】 上記の目的を達成する
ため、本発明では、天びん皿を囲む第１ひょう量室の内
側に、更に天びん皿を囲む第２ひょう量室が設けた天び
んにおいて、第１ひょう量室の扉の開閉を検知する検知
手段と、その検知結果に基づき第２ひょう量室の扉を上
記第１ひょう量室の扉の開閉に連動して開閉する駆動制
御手段と、第１ひょう量室の扉が閉じられてからの時間
経過を計測する計時手段を有し、上記の駆動手段が、計
時手段による計時結果に基づき第１ひょう量室の扉が閉
じられた状態が所定時間継続した場合には第２ひょう量
室の扉を自動的に開けるよう構成する。Means for Solving the Problems In order to achieve the above object, according to the present invention, in a balance, a second weighing chamber surrounding a balance plate is further provided inside a first weighing chamber surrounding a balance plate. Detecting means for detecting the opening and closing of the door of the first weighing chamber, and drive control means for opening and closing the door of the second weighing chamber in conjunction with opening and closing of the door of the first weighing chamber based on the detection result; The first weighing chamber has a time measuring means for measuring the time elapsed since the door of the first weighing chamber was closed, and the driving means described above operates in a state in which the door of the first weighing chamber is closed based on the result of the time measurement by the time measuring means. When the predetermined time is continued, the door of the second weighing chamber is automatically opened.
【０００６】また、上記の構成において、計時手段に代
えて第１ひょう量室内の温度を検出する温度センサを設
け、第１ひょう量室の扉が閉じられてからの第１ひょう
量室内の温度が、あらかじめ設定された温度以上度変化
したときに第２ひょう量室の扉を開けるよう構成しても
よい。更に、駆動手段により第２ひょう量室の扉を自動
的に開ける条件として、以上の他、第１と第２のひょう
量室内の温度差があらかじめ設定された温度差以上にな
る条件とすることができる。すなわち、第１および第２
ひょう量室内の温度をそれぞれ検出する第１および第２
の温度センサを設け、駆動手段が、第１ひょう量室内と
第２ひょう量室内の温度差があらかじめ設定された温度
以上の変化を示したときには第２ひょう量室の扉を開け
るよう構成してもよい。In the above arrangement, a temperature sensor for detecting the temperature in the first weighing chamber is provided in place of the time measuring means, and the temperature in the first weighing chamber after the door of the first weighing chamber is closed. However, the door of the second weighing chamber may be opened when the temperature changes by more than a preset temperature. Furthermore, the condition for automatically opening the door of the second weighing chamber by the driving means is, in addition to the above, the condition that the temperature difference between the first and second weighing chambers becomes equal to or more than a preset temperature difference. Can be. That is, the first and second
First and second detecting the temperature in the weighing chamber respectively
The temperature sensor is provided, and the driving means is configured to open the door of the second weighing chamber when the temperature difference between the first weighing chamber and the second weighing chamber indicates a change equal to or more than a preset temperature. Is also good.
【０００７】[0007]
【作用】 第１のひょう量室が閉じられた状態が一定時
間継続した場合に、第２ひょう量室の扉を自動的に開け
ることで、第２ひょう量室内の温度は第１ひょう量室内
の温度に近づき、両者の温度差が大きくなることなく第
２ひょう量室内の温度が周囲温度に対して大きく相違し
てしまうことがない。また、第１ひょう量室の扉を閉じ
た後、この第１ひょう量室内の温度が所定温度以上変化
した場合に、第２ひょう量室の扉を開けることで、第２
ひょう量室内の温度が第１ひょう量室内の温度に近づ
き、同様に第２ひょう量室内の温度が周囲温度と著しく
相違してしまうことが防止される。When the state in which the first weighing chamber is closed continues for a certain period of time, the door of the second weighing chamber is automatically opened, so that the temperature in the second weighing chamber is raised. And the temperature in the second weighing chamber does not greatly differ from the ambient temperature without increasing the temperature difference between the two. Further, after the door of the first weighing chamber is closed, when the temperature in the first weighing chamber changes by a predetermined temperature or more, the door of the second weighing chamber is opened to thereby open the second weighing chamber.
This prevents the temperature in the weighing chamber from approaching the temperature in the first weighing chamber, and similarly prevents the temperature in the second weighing chamber from being significantly different from the ambient temperature.
【０００８】更に、第１と第２のひょう量室内の温度差
が所定値以上に達した場合に、第２ひょう室の扉を自動
的に開けることでも、第２ひょう量室内の温度は第１ひ
ょう量室内の温度と所定温度差以内に保持され、周囲温
度と著しく相違してしまうことを防止できる。Further, when the temperature difference between the first and second weighing chambers reaches a predetermined value or more, the temperature of the second weighing chamber can be automatically increased by automatically opening the door of the second weighing chamber. The temperature is kept within a predetermined temperature difference from the temperature in the single weighing chamber, and it is possible to prevent the temperature from being significantly different from the ambient temperature.
【０００９】[0009]
【実施例】 図１は本発明実施例の平面図で、第１ひょ
う量室２と第２ひょう量室３の天井をそれぞれ省略して
示している。天びんケースの上面から突出して設けられ
た皿１は、外側の第１ひょう量室２内に配置されてお
り、この第１ひょう量室２の内側には、更に皿１を囲む
ような第２ひょう量室３が設けられている。FIG. 1 is a plan view of an embodiment of the present invention, in which ceilings of a first weighing chamber 2 and a second weighing chamber 3 are omitted. A plate 1 protruding from the upper surface of the balance case is disposed in an outer first weighing chamber 2. Inside the first weighing chamber 2, a second weighing chamber 2 surrounding the plate 1 is further provided. A weighing chamber 3 is provided.
【００１０】第１ひょう量室２には、その左右にそれぞ
れスライド式の扉２１および２２が設けられている。こ
の左右の扉２１および２２は、それぞれに対応して配設
されたフォトセンサ４１および４２によって、それぞれ
の開閉状態が検知されるようになっている。第２ひょう
量室３は、天びんケースの上面に固定された固定部３１
と、その回りを回動自在の円筒状扉３２によって構成さ
れ、円筒状扉３２はモータ（図示せず）および後述の駆
動回路によって、左右いずれかの向きに約９０°だけ回
転駆動される。The first weighing chamber 2 is provided with sliding doors 21 and 22 on the left and right sides thereof, respectively. The left and right doors 21 and 22 are configured such that the open / closed state of each is detected by photosensors 41 and 42 disposed corresponding to the doors. The second weighing chamber 3 is provided with a fixing portion 31 fixed to the upper surface of the balance case.
And a cylindrical door 32 rotatable therearound. The cylindrical door 32 is driven to rotate by about 90 ° in a right or left direction by a motor (not shown) and a drive circuit described later.
【００１１】第１ひょう量室２および第２ひょう量室内
には、それぞれ温度センサ５１および５２が配設されて
おり、それぞれの室内の温度が検出される。図２は本発
明実施例の駆動回路の構成を示すブロック図である。フ
ォトセンサ４１および４２からの出力、および、温度セ
ンサ５１および５２からの出力は、それぞれアンプ１
１，１２，１３または１４を介して制御回路１０に入力
されている。また、この制御回路１０にはタイマ１５が
接続されており、このタイマ１５は制御回路１０から供
給される指令信号によってスタートまたはリセットされ
る。Temperature sensors 51 and 52 are provided in the first weighing chamber 2 and the second weighing chamber, respectively, and the temperatures in the respective chambers are detected. FIG. 2 is a block diagram showing the configuration of the drive circuit according to the embodiment of the present invention. The outputs from the photo sensors 41 and 42 and the outputs from the temperature sensors 51 and 52 are
It is input to the control circuit 10 via 1, 12, 13 or 14. Also, a timer 15 is connected to the control circuit 10, and the timer 15 is started or reset by a command signal supplied from the control circuit 10.
【００１２】制御回路１０はこれらのセンサ群やタイマ
からの信号に基づき、第２ひょう量室３の円筒状扉３２
を駆動するモータ１６のドライバ１７に制御指令を与
え、以下に示すタイミングで第２ひょう量室３の円筒状
扉３２を開閉するように構成されている。図３は制御回
路１０による第２ひょう量室３の円筒状扉３２の開閉動
作を示すフローチャートである。The control circuit 10 controls the cylindrical door 32 of the second weighing chamber 3 based on signals from these sensors and a timer.
A control command is given to a driver 17 of a motor 16 for driving the second weighing chamber 3, and the cylindrical door 32 of the second weighing chamber 3 is opened and closed at the following timing. FIG. 3 is a flowchart showing the opening and closing operation of the cylindrical door 32 of the second weighing chamber 3 by the control circuit 10.
【００１３】この例においては、フォトセンサ４１およ
び４２の出力に基づき、第１ひょう量室２の左右の扉２
１または２２のいずれかが開けられたとき、第２ひょう
量室３の円筒状扉３２が自動的に同じ側に回転し、第２
ひょう量室３は第１ひょう量室２の扉と同じ側が開放さ
れる（ＳＴ１〜４）。また、第１ひょう量室２の扉２１
および２２の双方が閉じられた時点でタイマ１５がスタ
ートし、あらかじめ設定された時間が経過すると、第２
ひょう量室３の円筒状扉３２が自動的に開放される（Ｓ
Ｔ５〜８）。In this example, the left and right doors 2 of the first weighing chamber 2 are based on the outputs of the photosensors 41 and 42.
When either 1 or 22 is opened, the cylindrical door 32 of the second weighing chamber 3 automatically rotates to the same side,
The same side of the weighing chamber 3 as the door of the first weighing chamber 2 is opened (ST1 to ST4). The door 21 of the first weighing chamber 2
When both of the timers 22 and 22 are closed, the timer 15 starts.
The cylindrical door 32 of the weighing chamber 3 is automatically opened (S
T5-8).
【００１４】更に、温度センサ５１からの出力に基づ
き、現時点の第１ひょう量室２内の温度Ｔ1 が、扉２１
および２２がともに閉じられていた状態での最終的な第
１ひょう量室２内の温度Ｔ0 に対してあらかじめ設定さ
れた温度、例えば２°Ｃ以上変化した場合にも、第２ひ
ょう量室３の円筒状扉３２が自動的に開放される（ＳＴ
９〜１２）。Further, based on the output from the temperature sensor 51, the current temperature T 1 in the first weighing chamber 2 is
Final first weighing chamber preset temperature for the temperature T 0 in the 2, even when the changed e.g. 2 ° C or more, the second weighing chamber in a state and in which 22 has been closed together 3 is automatically opened (ST
9-12).
【００１５】更にまた、温度センサ５１および５２の出
力に基づき、第１ひょう量室２内の温度ＴA と第２ひょ
う量室３内の温度ＴB との差が、あらかじめ設定された
温度差、例えば１°Ｃ以上になった場合にも、第２ひょ
う量室３の円筒状扉３２が自動的に開放される。以上の
ように、第１ひょう量室２の扉２１および２２が閉じら
れた状態が一定時間以上継続した場合、第１ひょう量室
２の扉２１および２２が閉じられてからこの第１ひょう
量室２内の温度が所定温度以上変化した場合、および、
第１ひょう量室２と第２ひょう量室３の温度差がある一
定の値以上となった場合には、それぞれ第２ひょう量室
３の扉３２が自動的に開放され、これによって第２ひょ
う量室３内の温度と第１ひょう量室２内の温度が平均化
され、周囲温度に対して著しく相違した温度になること
がない。[0015] Furthermore, on the basis of the output of the temperature sensor 51 and 52, the difference between the temperature T B of the temperature T A of the first weighing chamber 2 in the second weighing chamber 3, preset temperature difference For example, even when the temperature reaches 1 ° C. or more, the cylindrical door 32 of the second weighing chamber 3 is automatically opened. As described above, when the state in which the doors 21 and 22 of the first weighing chamber 2 are closed continues for a predetermined time or more, the first weighing is performed after the doors 21 and 22 of the first weighing chamber 2 are closed. When the temperature in the chamber 2 changes by a predetermined temperature or more; and
When the temperature difference between the first weighing chamber 2 and the second weighing chamber 3 exceeds a certain value, the door 32 of the second weighing chamber 3 is automatically opened, and thereby the second weighing chamber 3 is opened. The temperature in the weighing chamber 3 and the temperature in the first weighing chamber 2 are averaged, so that the temperature does not become significantly different from the ambient temperature.
【００１６】ここで、扉２１および２２が閉じられた状
態が一定時間継続したという条件（第１条件）により扉
３２を開放することは、温度変化がゆるやかなときで、
かつ、長時間天びんを使用していないときに有効であ
り、また、第１ひょう量室内の温度変化が一定温度以上
変化したという条件（第２条件）により扉３２を開放す
ることは、第１ひょう量室２と第２ひょう量室３の温度
差が比較的小さいときに有効であって、更に第１および
第２ひょう量室２および３の温度差が一定値以上になっ
たという条件（第３条件）により扉３２を開放すること
は、冷暖房等に伴う急激な周囲温度変化により第１ひょ
う量室２と第２ひょう量室３に温度差が生じる場合に有
効である。Here, opening the door 32 under the condition that the doors 21 and 22 are kept closed for a certain period of time (first condition) is performed when the temperature changes slowly.
Opening the door 32 under the condition that the temperature change in the first weighing chamber has changed by a certain temperature or more (second condition) is effective when the balance has not been used for a long time. This is effective when the temperature difference between the weighing chamber 2 and the second weighing chamber 3 is relatively small, and the condition that the temperature difference between the first and second weighing chambers 2 and 3 is equal to or more than a predetermined value ( Opening the door 32 under the (third condition) is effective when a temperature difference occurs between the first weighing chamber 2 and the second weighing chamber 3 due to a rapid change in ambient temperature due to cooling and heating.
【００１７】なお、以上の実施例では、第１〜第３条件
のいずれか一つが満たされたときに第２ひょう量室の扉
を自動的に開放したが、これらの条件の全てまたは二つ
が満たされたときに第２ひょう量室の扉を開放するよう
に構成することもできる。また、第２ひょう量室３の扉
３２を自動的に開放した状態において、温度センサ５１
と５２の出力に基づき、第１ひょう量室２と第２ひょう
量室３の温度差が設定温度以内に収まった時点で、扉３
２を自動的に閉じるように構成することもできる。In the above embodiment, the door of the second weighing chamber is automatically opened when any one of the first to third conditions is satisfied. It is also possible to configure so that the door of the second weighing chamber is opened when it is filled. When the door 32 of the second weighing chamber 3 is automatically opened, the temperature sensor 51
When the temperature difference between the first weighing chamber 2 and the second weighing chamber 3 falls within the set temperature based on the outputs of
2 may be configured to close automatically.
【００１８】[0018]
【発明の効果】 以上説明したように、本発明によれ
ば、第１ひょう量室とその内側で更に天びん皿を囲む第
２ひょう量室を持つ天びんにおいて、第２ひょう量室の
扉を、第１ひょう量室の扉が閉じられた状態が設定時間
以上継続した場合、第１ひょう量室の扉が閉じられてか
らその第１ひょう量室内の温度が設定温度以上変化した
場合、あるいは、第１ひょう量室と第２ひょう量室の温
度差が設定値以上になった場合のいずれかの場合に、第
２ひょう量室の扉を自動的に開放するように構成したの
で、第２ひょう量室内の温度はその扉の開放ごとに第１
ひょう量室内の温度と平均化され、周囲温度に対して大
幅に相違することが未然に防止される。その結果、天び
んの使用に際して第２ひょう量室の扉を開放したとき
に、従来のように周囲温度との温度差に起因してドリフ
トや対流が生じることがなくなり、使用当初から信頼性
の高い測定結果を得ることができる。As described above, according to the present invention, in a balance having the first weighing chamber and the second weighing chamber surrounding the balance plate inside the first weighing chamber, the door of the second weighing chamber is When the state in which the door of the first weighing chamber is closed continues for the set time or more, when the temperature in the first weighing chamber changes by the set temperature or more after the door of the first weighing chamber is closed, or Since the door of the second weighing chamber is automatically opened when the temperature difference between the first weighing chamber and the second weighing chamber exceeds the set value, the second weighing chamber is opened automatically. The temperature in the weighing chamber becomes the first temperature each time the door is opened.
The temperature is averaged with the temperature in the weighing chamber, so that a significant difference from the ambient temperature is prevented. As a result, when the door of the second weighing chamber is opened at the time of using the balance, drift and convection do not occur due to the temperature difference from the ambient temperature as in the related art, and the reliability is high from the beginning of use. Measurement results can be obtained.
【図１】 本発明実施例の平面図で、第１および第２ひ
ょう量室の天井を省略して示す図FIG. 1 is a plan view of an embodiment of the present invention, in which ceilings of first and second weighing chambers are omitted.
【図２】 本発明実施例の駆動回路の構成を示すブロッ
ク図FIG. 2 is a block diagram illustrating a configuration of a drive circuit according to an embodiment of the present invention.
【図３】 本発明実施例の制御回路１０による扉３２の
開閉動作を示すフローチャートFIG. 3 is a flowchart showing the operation of opening and closing the door 32 by the control circuit 10 according to the embodiment of the present invention.
１・・・・皿 ２・・・・第１ひょう量室 ２１，２２・・・・扉 ３・・・・第２ひょう量室 ３２・・・・円筒状扉 ４１，４２・・・・フォトセンサ ５１，５２・・・・温度センサ １０・・・・制御回路 １１〜１４・・・・アンプ １５・・・・タイマ １６・・・・モータ １７・・・・ドライバ 1 ··· Plate 2 ··· First weighing chamber 21, 22 ··· Door 3 ··· Second weighing chamber 32 ··· Cylindrical door 41, 42 ··· Photo Sensors 51, 52 Temperature sensor 10 Control circuit 11-14 Amplifier 15 Timer 16 Motor 17 Driver
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G01G 21/28 - 21/30 G01G 23/48──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) G01G 21/28-21/30 G01G 23/48
Claims (3)
に、更に上記天びん皿を囲む第２ひょう量室が設けられ
ているとともに、上記第１ひょう量室の扉の開閉を検知
する検知手段と、その検知結果に基づき上記第２ひょう
量室の扉を上記第１ひょう量室の扉の開閉に連動して開
閉する駆動制御手段と、上記第１ひょう量室の扉が閉じ
られてからの時間経過を計測する計時手段を有し、上記
駆動手段は、上記計時手段による計時結果に基づき上記
第１ひょう量室の扉が閉じられた状態が所定時間継続し
た場合には上記第２ひょう量室の扉を自動的に開けるよ
う構成されてなる電子天びん。A first weighing chamber surrounding the balance pan is further provided inside a first weighing chamber surrounding the balance pan, and a detection for detecting opening and closing of a door of the first weighing chamber is provided. Means, drive control means for opening and closing the door of the second weighing chamber based on the detection result in conjunction with opening and closing of the door of the first weighing chamber, and closing the door of the first weighing chamber. A time measuring means for measuring a lapse of time from the second measuring means. The driving means is configured to perform the second measuring when the state in which the door of the first weighing chamber is closed for a predetermined time is based on the result of the measuring by the time measuring means. An electronic balance configured to automatically open the weighing chamber door.
に、更に上記天びん皿を囲む第２ひょう量室が設けられ
ているとともに、上記第１ひょう量室の扉の開閉を検知
する検知手段と、その検知結果に基づき上記第２ひょう
量室の扉を上記第１ひょう量室の扉の開閉に連動して開
閉する駆動制御手段と、上記第１ひょう量室内の温度を
検出する温度センサを有し、上記駆動手段は、上記温度
センサの出力に基づき上記第１ひょう量室の扉が閉じら
れてからあらかじめ設定された温度以上の温度変化があ
ったときには上記第２ひょう量室の扉を開けるよう構成
されてなる電子天びん。2. A second weighing chamber surrounding the balance pan is further provided inside a first weighing chamber surrounding the balance pan, and detecting whether a door of the first weighing chamber is open or closed. Means, drive control means for opening and closing the door of the second weighing chamber in conjunction with opening and closing of the door of the first weighing chamber based on the detection result, and temperature for detecting the temperature in the first weighing chamber. A sensor for detecting a temperature of the second weighing chamber when the temperature of the second weighing chamber changes by a predetermined temperature or more after the door of the first weighing chamber is closed based on an output of the temperature sensor. An electronic balance configured to open a door.
に、更に上記天びん皿を囲む第２ひょう量室が設けられ
ているとともに、上記第１ひょう量室の扉の開閉を検知
する検知手段と、その検知結果に基づき上記第２ひょう
量室の扉を上記第１ひょう量室の扉の開閉に連動して開
閉する駆動制御手段と、上記第１および第２ひょう量室
内の温度をそれぞれ検出する第１および第２の温度セン
サを有し、上記駆動手段は、上記第１と第２の温度セン
サの出力に基づき上記第１ひょう量室内と第２ひょう量
室内の温度差があらかじめ設定された温度以上の変化を
示したときには上記第２ひょう量室の扉を開けるよう構
成されてなる電子天びん。3. A second weighing chamber surrounding the balance pan is further provided inside the first weighing chamber surrounding the balance pan, and detection for detecting opening and closing of a door of the first weighing chamber. Means, drive control means for opening and closing the door of the second weighing chamber in conjunction with opening and closing of the door of the first weighing chamber based on the detection result, and controlling the temperature in the first and second weighing chambers. A first temperature sensor for detecting the temperature of the first weighing chamber and a second temperature sensor for detecting a temperature difference between the first weighing chamber and the second weighing chamber based on the outputs of the first and second temperature sensors; An electronic balance configured to open a door of the second weighing chamber when a change over a set temperature is shown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40571790A JP2822671B2 (en) | 1990-12-25 | 1990-12-25 | Electronic balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40571790A JP2822671B2 (en) | 1990-12-25 | 1990-12-25 | Electronic balance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04221720A JPH04221720A (en) | 1992-08-12 |
| JP2822671B2 true JP2822671B2 (en) | 1998-11-11 |
Family
ID=18515329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP40571790A Expired - Fee Related JP2822671B2 (en) | 1990-12-25 | 1990-12-25 | Electronic balance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2822671B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011158497A1 (en) | 2010-06-17 | 2011-12-22 | 株式会社エー・アンド・ディ | Weighing device having a weighing chamber |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115803593A (en) * | 2020-07-06 | 2023-03-14 | 株式会社爱安德 | Windshield for balance |
-
1990
- 1990-12-25 JP JP40571790A patent/JP2822671B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011158497A1 (en) | 2010-06-17 | 2011-12-22 | 株式会社エー・アンド・ディ | Weighing device having a weighing chamber |
| US9121749B2 (en) | 2010-06-17 | 2015-09-01 | A&D Company Limited | Weighing device having a weighing chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04221720A (en) | 1992-08-12 |
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