DE3213015A1 - Electronic balance having a plurality of operating modes - Google Patents

Abstract

Electronic balances having a plurality of operating modes have hitherto required comprehensive mechanical operating elements, for example in the form of a keyboard, in order to select the program suitable for the desired operating mode. Now the invention is intended to allow the selection of the desired program without these additional operating elements. For this purpose, there are provided a non-volatile electronic memory (17) and a counter (18) which, together with an operating element present as standard on the balance, namely the tare key, make it possible to select the desired program as follows: if this operating element is actuated at the same time as when the supply voltage is switched on, the counter (18) is activated in a menu program and counts through all the program numbers slowly. The counter (18) is stopped at the number of the desired program by a further actuation of the operating element, and this program number is transmitted to the non-volative electronic memory (17). The program fixed in this way is used, irrespective of whether the supply voltage is switched off and on again in the meantime, until a new program number is selected by a new call-up of the menu program. <IMAGE>

Description

description

The invention relates to an electronic Scales with a Keßwertaufnehmer, with a digital one Signal processing unit that has several programs that operate on special operating modes of the balance are tailored, features, with a digital. Display, with an operating element for zeroing the result in the digital display and with switching means for switching on the supply voltage.

Scales of this type are known from DE-OS 29 22, for example. The different programs can be used e.g. for the operating modes piece counting, dosing of several components, finished package control, animal weighing, etc., or also for different environmental conditions (e.g. calmer or more restless Installation site) must be optimized.

The selection of the individual programs and thus the definition of the operating mode of the balance was done up to now by exchangeable electronic program memory in cooperation with a keypad. However, these are separate memories and control elements · Disadvantageous for the construction of a compact balance.

The object of the invention is therefore the selection of the individual programs of the balance in the balance housing to integrate. It is also an object of the invention to enable the selection of the individual programs without additional control elements .. '

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This is achieved according to the invention in that an electronic counter for the program numbers is present that a non-volatile electronic Memory is available in which the number of the last program used is stored, that In the digital signal processing unit an additional one Menu program for selecting the operating mode programming is available that the programrri .numbers counting slowly and that this menu program when the supply voltage is switched on and simultaneous actuation of the control element is activated. This allows without external mechanical or electronic storage elements and without additional operating elements that on the respective Operating mode tailored program can be selected and saved,

■ The current status of the counter for the program numbers can e.g. be indicated by a row of LEDs. However, it is advantageously used in the Any existing digital display is displayed and identified by an additional symbol to a To report confusion with weighing results.

The definition of a new program is then expediently done in such a way that by pressing again of the control element of the counter for the program numbers is stopped and its current content is transferred to the non-volatile electronic memory

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will. This will make the specific program from the Signal processing unit retrieved. The control becomes Yes while selecting one Program in its actual puncture to zero point of the result is not required. This means that selecting a program does not require anything additional operating elements on the scales.

When counting through the program numbers in the counter, if they match the number in the non-volatile The program number stored in the electronic memory is expediently specially marked, what e.g. by another additional symbol or by a different brightness or by a longer pause can take place before switching to the next program number. In another In an expedient embodiment, the counter for the program numbers begins with the non-volatile one ■ Electronic memory stored program number ■ and counts all program numbers cyclically by.

However turned on Verso.rgungsspannung, without simultaneously removing the operating element is operated to NuIlstellen the result, the digital signal processing unit retrieves the determined by the content of non-volatile electronic memory program · As a result, the scale retains its one selected program even after switching off and Switching on the supply voltage again with the same task for the scales, the operator does not have to enter or select the required program every working day.

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The invention is described below with reference to the only schematic drawing explained. This drawing shows a longitudinal section through the essential parts an electronic balance based on the principle of the electromagnetic strength calculation and the essentials Parts of the electronics in the form of a block diagram. ■;

The weighing system consists of a movable load receiver 3, which carries the load tray 7 and over two links 5 and 6 in the form of a parallel guide with the fixed part of the balance connected 1st. As joints serve in each case leaf springs 5 a, 5 b, 6 a, 6 b on the Ends of the links 5 and 6. The load receiver 3 carries on a protruding arm 4 a coil 9 "the" with the Field of a stationary permanent magnet system is in interaction. The position sensor'11 scans the Location of the load receiver 3 and delivers via a Control amplifier 12 to compensate for the load necessary electricity. This compensation current is fed to the coil 9 via movable supply lines 10 and at the same time it flows through the measuring transducer stand 13- Heating voltage tapped, digitized in an analog / digital converter 14, in a digital one Signal processing unit 15 processed and in the Digital display 16 displayed. The power supply for the scale electronics is carried out in a known manner a voltage supply unit 20, - by a • Switch 21 connected to a voltage source can be. Both a battery and an AC voltage supply network can be used as the voltage source to serve.

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The digital signal processing unit 15 comprises e.g. Options for taring, for specifying setpoints, for averaging, for taking into account Calibration factors, etc., from which various programs tailored to different operating modes are put together. Each program is identified by a specific program number. the The number of the currently used program is in a non-volatile electronic memory 17 saved. This non-volatile electronic " Memory 17 can be implemented, for example, by a battery-backed RAM or by an EAROM or nv-RAM. By the selection of a non-volatile memory remains this program number even when the supply voltage is switched off stored and when the supply voltage is switched on again, the digital signal processing unit asks 15 the program number stored in memory 17 and calls this program back on. Without intervention by the operator, the program that has been called up, and thus ■ receive the adaptation to a certain operating mode.

To select a different program, a counter 18 is now provided for the program number. This Counter 18 is activated within the framework of a menu program when the switch 21 simultaneously switches on the supply voltage control element 19 normally used for taring is actuated. The counter 18 counts one after the other slowly through the different program numbers; the

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respective reading of the counter 18 is in the digital display 16 is displayed together with a further symbol (e.g. "P"). By repeating Pressing the control element 19 is the counter 18 stopped and its state in the non-volatile electronic memory 17 transferred. This ends the menu program and that is indicated by the number in non-volatile electronic memory 17 specific program is used by the digital signal processing · Unit 15 called. The program selected in this way is kept for so long by the digital signal processing unit 15 used until again by actuating the operating element 19 when switching on the supply voltage . the · menu program is called up.

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To remind the operator of the previously used program when selecting a new program it is advisable to either call the counter 18 for the program numbers in the case of the non-volatile electronic memory 17 to start stored program number or if they match the status of the counter 18 with that stored in the non-volatile electronic memory 17 Program-Mummer to specially identify the advertisement.

This can be done e.g. by a different brightness of the display or by another additional symbol or by a longer pause before telling the world happens »

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Some non-volatile electronic memory components only allow a limited number of overrides. Ground these components for the non-volatile electronic memory 17 used and is with a more frequent change of It is a matter of course to calculate the program possible by providing several non-volatile electronic devices that are used one after the other Memory 17 to extend the service life, as in 'the German patent application 32 00 872 in detail ■ described 1st. '

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Claims (1)

Sartorius GmbH file SW 8202 Weender Landstrasse 94-108 Κδ / br D-3 ^ 00 Göttingen Electronic balance with several operating modes Patent claims: Electronic scales - with a transducer, - With a digital signal processing unit, the ü several programs that de special operating modes Scales are tailored, features, - with a digital display, - With an operating element to zero the result in the digital display j ^, and with switching means for switching on the supply voltage COPY characterized, that an electronic counter (18) for the program numbers is available, - that a non-volatile electronic memory (17) is available in which the number of the last used Program is stored, - that in the digital signal processing unit '15) an additional Kenü program for selecting the operating mode programs is available that allows the program numbers to be counted slowly in counter (18), - and that the older one; additional Kenü programs when switching on the supply voltage and simultaneous actuation of the operating element (19) is activated. 2. Electronic balance according to claim 1, characterized in that the state of the counter (18) together with another symbol is displayed in the digital display (16). ' 3 · Electronic balance according to claim 1 or 2, characterized in that the counter (18) is stopped by actuating the control element (19) again, its content is transferred to the non-volatile electronic memory (17) and the operating mode program determined in this way in the digital signal processing unit 1 approx. (15) is used. SW 8202. BAD ORIGINAL _ _{ΛΟλ /} COPY ¹ I. Electronic balance according to claim 2, characterized in that when the status of the match
Counter (18) with the non-volatile electronic
Memory (17) stored program number the display is specially marked. 5- Electronic balance according to one of claims 1-4, dadu characterized in that the counter (18) is stored in the non-volatile electronic memory (17) with the Program number begins. 6. Electronic balance according to one of claims 1-5, characterized in that its digital signal processing unit (15). when switching on the supply voltage without pressing the operating delay (Γ. that by the content of the non-volatile electronic Memory (17) calls certain operating mode program. ^{SW 8202} BAD ORIGINAL