DE1808100U - DEVICE FOR STANDARD VALUE MARKING ON MEASURING AND REGISTRATION DEVICES. - Google Patents

Description

Fritz Hellige & Co ₀ Freiburg i.Br ₆ , aen 3.9 «1959

G.m.boH «Cho / Fo P 40

Utility model registration

"Device for standard value marking" at measuring and registering = devices".

In technical and scientific metrology, e.g. 3. also with electrodiagnostic Devices, are often electrical measuring devices for electrical or non-electrical large, such as prints, changes in length, Temperatures and other variables connected to recording devices in order to ensure a continuous quantitative recording of the fluctuations in the measured variables to obtain. In this case, a calibration is required in order to determine from the amplitude of the recording track carried by the recording medium to be able to deduce the associated value of the measured variable, which can usually be read on an instrument built into the measuring device =, usually become the one or more known values for this purpose signal voltages corresponding to these quantities to be measured into the input of the registration device and the deflection of the registration organ by means of a built-in sensitivity adjuster to a suitable one Brought a rash in which position the controller then during the measurement has to remain.

It is already known to equip the measuring device with devices, for example when a key is pressed, the electrical signal corresponding to a certain standard value of the measured variable is sent to the recording device ../ ,. supply so that the calibration does not require a significant effort and in the course of a measurement or a registration ₀ quite often the label of the standard value v may repeatedly ground /. The latter facilitates the subsequent evaluation and avoids errors that could arise from changing the sensitivity of the recording device during operation.

In particular, such devices are used also for the measurement of non-electric quantities, which are then reacted in a transducer into electrical signals, '\ IENN generating default values of the non-electrical measured variable cumbersome is -is a built into the meter electrical simulator circuit uses that the

■ certain. Delivers electrical signals corresponding to standard values of the measured variable.

The present invention now relates to measuring or recording devices several different measurement or sensitivity ranges and tracked the aim of creating a standard value feed adapted to the sensitivity ranges during calibration and a clear one Marking of these standard values to avoid confusion of the sensitivity ranges not possible.

With previously known devices for measuring and registering different types of variables with multiple sensitivity ranges, only the option of feeding in a standard signal corresponding to a single value of the measured variable was provided, which at most was allowed to correspond to the entire value range of the most sensitive measuring range, so that the maximum output of the measuring or _o exceeded recording device and the device is damaged thereby be konnteο

It was then the yardstick on the recording medium for all measuring ranges, Assuming linearity, clearly defined for evaluation, but the accuracy in the measuring range steps of lower sensitivity when setting the sensitivity and when evaluating the registration correspondingly reduced. Since the sensitivity in some measuring devices can be set differently by orders of magnitude, it was possible through the change in the standard value deflection in the reciprocal relationship to the change in the measuring range also causes considerable errors in the evaluation are caused in the already less sensitive measuring ranges «

The inventive device for standard value marking in measuring and recording devices, on the other hand, is characterized by a Kopp__ between the sensitivity range switch and the standard encoder in such a way that with the setting of a sensitivity range, the standard value of the measured variable assigned to it automatically in the Standard encoder is provided for feeding into the device.

According to a further idea of the invention, means or measures are

for distinctive identification of the standard value recording. traces in unambiguous assignment to the set measuring range intended. As a result, the recording track is evaluated a clear assignment of the standard deflection to the standard value and the determination of the set sensitivity range or Measuring range possible, so that additional notes about this are not necessary will.

The inventive equipment of a device avoids damage that For example, this could result from operating errors if a too high standard value in the device would be fed.

The proposal will be explained in the following on the basis of a schematic Circuit diagram of one of the manifold, according to knowledge of the Basic principle explained embodiments lying within the ability of a person skilled in the art without further ado.

The value recorded by the measuring transducer or sensor is stored in a measuring transducer 1 converted into an electrical quantity and via the line 13 »if necessary with the interposition of an amplifier 3> the display or registration unit 2 supplied. By means of one, for example on any suitable organ of the amplifier 3 acting

Sensitivity range switch 4 with control button 4a can be used to set different measurement or sensitivity ranges. A sensitivity divider 7, for example inserted between the amplifier 3 and the measuring or recording unit 2, with an operating button Yes. is used to fine-tune the desired standard deflection for the respective standard value.

The calibration or standard value transmitter 5 is, for example, over the line 14 and the amplifier 3 connected to the feed line to the measuring unit 2. A push button or is used to feed in the calibration or standard value a corresponding organ 9 is provided, preferably when it is actuated a switch 10 in the measured value supply line I3 is open, and the switch 11 in the standard value supply line is closed. The one shown Embodiment is only the principle. In fact, there is

manifold possibilities for feeding a calibration or "," standard value into a measuring or recording device

\ According to the invention, the measuring range switch 4 is now via an electrical

^! sches or mechanical. Coupling link 6 with the standard encoder 5 of the

^{1 type} coupled that automatically with switching to another

'Sensitivity or =, measuring range of the corresponding calibration or

'' Standard value, which in measuring or display unit 2 always has a desired

L ten, which should generally deliver the same deflection, is kept ready

and when the key 9 is pressed, the correct

; The size of the deflection indicates that the device is fully operational.

■ -. '■ .-' ■ - ■ ι

Depending on the requirements, a separate standard deflection can now also be provided for each measuring range or else a suitable standard deflection for a group of several consecutive ones Measuring or sensitivity ranges o

A further development of the inventive concept consists in the fact that

? neither the device with several calibration or standard value transmitters 5 and assigned

' subordinate actuators, such as pushbuttons, is equipped, or

f: that the standard value transmitter for the simultaneous availability of several

? Standard values' is formed, which are approximately via different lines 1'4

ti 'with actuation of pushbuttons or the equivalent organs9

> * can be fed in, so that, for example, certain fractions of a

I maximum deflection that corresponds to the switched-on measuring range

ψ, can be delivered to each other. This measure enables, among other things, a

* Check the linearity of the deflection in the measuring unit or in the recording

I factory 2. For this purpose can be a _u ch an automatic provide the beispiels-

'«" Wise, when a key is pressed, a sequential relay is triggered one after the other

F 'the standard signals belonging to the switched-on measuring range as signal

L naifo-Xge "delivers ...

\ * TJM the standard rashes produced clearly assigned their measuring and sensitivity ranges and thus recognize the latter immediately kön- ψ "'nen, for example, the Standardißarken suitable [characterized by its special appearance, If you register with the zero point in the middle; , "Of the recording medium and each with a different standard value or _o

- 5 - ■

The identification can be obtained for a different standard value sequence for two different measuring ranges or measuring range groups in that the deflection direction for the two standard values is wear-and-tear. Suitably, the switch 8 is required for this purpose ^with: fixedly coupled switch for the measuring range, as indicated by the dashed '. chelte line 15 is indicated _o

;> General may for example also marked the calibration curves by ■ features are that they are broken, and the length of remain- 'reproduced track sections or gaps different with the range' ■ -. is. For this purpose, facilities of a known type can be provided that

respond when pressing the calibration button 9. In line 14 between ^; the standard value transmitter 5 and the amplifier 3 or the measuring or regi = strierwerk 2 can, for example, also have an interrupter - in the figure z.3 _o '.'. [ this can also be represented by position 8 if this is not · - .. 'represents the aforementioned switch - be switched on, which, as "the figure then indicates with dashed lines, is coupled to the area switch 4'■" ■ that the interruption cycle in the sense described above :: ^! ; is changed with the switched-on area.

- ■ Also through the use of key switches with fish contacts,; eg the area identification of the calibration deflections in simple V / eise; possible if the fleeting contacts inevitably occur when the area

^! ■ switch 4 can be switched accordingly »

■ When using one of the above-mentioned devices to generate 'Γ Marking signal sequences each with several graded standard values in the case of two measuring ranges or two measuring range groups, for example, a range identification can be achieved by the sequence in

Directions is traversed.

Depending on the switched-on measuring range, in each case in different

Due to the design of the standard value marking according to the invention; will a clear, sufficiently accurate calibration of the recorder or measuring device in relation to the size to be measured. Appropriately is on the measuring or recording device, which is equipped with the described standard value marking device according to the invention,

|: in an obvious way through, suitable design and lettering ; the control panel shows which standard version of the marking ■: ** device is assigned to the measuring range.

Claims (1)

A η β ρ r ii che; ■ 1.) Device for standard value marking "in measuring and recording devices with at least two sensitivity ranges and these adapted, at least two different fixed calibration or standard values, characterized by a coupling (6) between the sensitivity range switch (4) and the calibration or standard = encoder (5) in such a way that the measured variable is provided ^ automatically default value in the encoder (5) for feeding into the measuring instrument (2) with the adjustment of a sensitivity range of this associated default value. · " 2.) Device according to claim 1, characterized by means (δ) or . Measures for different labeling of the standard value recording traces with a clear assignment to the set sensitivity range. X 3) A device according to claim 2, characterized by means for, intermittently interrupting the recording track of the set calibration or standard value with a $ e after-the sensitivity range of different length of the recorded track parts and / or . the intermediate room between them, _etc. 4.) Device according to claim 2, characterized by means (8) for Achieving a different direction in the recording assigned to the two different sensitivity ranges ■ Default values. 5ö) Device according to claims 1 to 4> characterized by an encoder for the size, according to graduated standard values in y / at least one . Sensitivity range for checking the deflection characteristics. 60) Device according to claim 5> characterized by a when operating of the standard value transmitter activated slave relay for feed-in '■■■. '■ (.-.
. ' the levels of the relevant standard value, one after the other other