DE1030568B - Recording measuring device with a measuring range extending over several powers of ten and several writing devices assigned to the same measured value, in particular for measuring the voltage values supplied by a mass spectrograph - Google Patents

Description

GERMAN

In the chemical industry, the mass spectrograph is increasingly used because of its great accuracy. It is now desirable to write down the spectrogram, which could be recorded point by point, for reasons of time. If this is to be done automatically, the problem arises that the voltage supplied by the spectrograph fluctuates in the order of magnitude from about 1 to 10,000, it being necessary ^{to detect the individual peaks with an accuracy of 1 fl} / o.

You already have several, e.g. B. four measuring systems staggered in a sensitivity 3: 1, connected in parallel and thus using photographic paper (the photographic process must be chosen from considerations of speed) curves that meet the requirements correspond. However, they cannot be observed immediately, which is perceived as a disadvantage.

A second known method uses a potentiometer writer to measure its sensitivity automatically depending on the differential coefficient of the slope of the curve switches. However, the resulting curves are due to that which occurs after the switchover points The drop in the curve is not always clear and require a respective specification of the one used Sensitivity range, for which complicated mechanical and electronic means are required.

It is known to register any measured variable with different display sensitivity a number of coaxially juxtaposed spiral drums depending on the Measured variable by means of transmission gears to adjust different angular amounts and the respective positions of the spiral drums on provided in a corresponding number next to each other Recording strips, preferably to be automatically recorded in punctiform fashion. The one for the increased display sensitivity provided spiral drums have been severely limited in length, so that when Carry out several revolutions through the entire measuring range and the recorded Diagram lines repeatedly cross the entire width of the associated registration strip. The evaluation is made very difficult by this type of recording. It also requires the conversion the measured variables in drum movements require considerable effort.

According to the invention, the recording measuring device is characterized by a compensation recorder with several automatic balancing devices of different types connected to the same measuring voltage Measurement sensitivity, their writing devices driven simultaneously on the same Registration strips show the voltage curve as a registering.es Measuring device with a measuring range extending over several powers of ten and several dem

assigned to the same measured value
Writing devices, in particular for

Measurement of the voltage values provided by a mass spectrograph

Applicant:

Hartmann & Braun Aktiengesellschaft,
Frankfurt / M.-West 13, Graefstr. 97

Dr. rer. nat. Hans Wechsung, Frankfurt / M.,
has been named as the inventor

individual continuous lines of different measurement sensitivity register on top of each other. Such a measuring device enables an accurate and linear Recording of measured values that extend over any range of measurement.

Here, the accuracy of the measurement peculiar to the compensation devices is paired with the simplicity of the registration by adding continuous lines of different sensitivity appear superimposed on the same registration strip. Here is the number of Lines are limited to the number of writing devices, and the measuring process is always with reproduced with the correct sensitivity.

The invention is explained using an exemplary embodiment with reference to the drawings. In the drawing represents:

Figure 1 shows a compensation ink pen according to the invention, including a writing device for connection to a mass spectrograph and

Figure 2 shows a variant of the writing device.

The compensation ink pen has four automatic balancing devices I, II, III, IV. Each of these balancing devices has a series connection of a potentiometer P, an adjustable resistor R and a zero indicator / supplied by the battery B. The compensation tapped at the wiper vS "of each potentiometer P

809 527/2 «

Claims (1)

3 4 sation voltage E _p is, with the measuring voltage E _{x has} practically not been deflected. You write in series and this in the opposite direction at the input only on the zero line assigned to them of an amplifier V. All adjustment devices are straight. are therefore with their inputs on the same At the registration b (Fig. 1), which is a measurement voltage. At the output of each amplifier is 5 higher measuring voltage than with the registration a a motor M, which requires 5 * of the associated with the grinder, is that of the most sensitive adjustment Potentiometer is mechanically coupled. The pen assigned to the receiving device to the end The infinity of the adjustment devices has been deflected against the scale and has become there graduated from each other, namely the sensitivity to a stop should be applied. In this case, songs Adjustment device I is the largest and that io produces the less sensitive adjustment device the adjustment device IV be the smallest, while the pen assigned to II the measured value, rend the sensitivities of the adjustment device while the one assigned to the adjustment device III values II and ITI in between - the writing pen remains behind in its amplitude. the point. The adjustment of the sensitivity is the pen of the balancing device with the least made with the resistor R. The greater 15 sensitivity has not left its zero line, This resistance is chosen, the smaller the registration c (Fig. 2) applies to the case that the voltage present at the potentiometer P and the measuring voltage compared to those previously considered the grinder must therefore continue to be enlarged, S am Poten- felling. Now tiometer can be adjusted until the compensation of the adjustment devices I, II and III Measurement voltage E _{x is} reached. This is why these 20 nibs assigned almost to the end Resistance at the individual adjustment devices I of the recording strip has been deflected while to IV is increasingly reduced, the most insensitive adjustment device IV is reduced. Heinert also writes the full loop according to the sensitivity of the nib, the balancing devices. It can be seen that in the case of the three previously described voltage E _x of a certain size can be measured, 25 of which registrations exceed the individual measured values. so the potentiometer slider places the adjustment on each other. In case d it is assumed that only facility I the longest way back while the most sensitive system has responded. This results in the other adjustment devices. It follows from this that the registration with increasingly reduced in size. any high measuring voltages in any case The adjustment motors M are each set with a 30 and provide unambiguous measured values. Pen holder Ji ₁ to H _i coupled, of which the circuit diagram provides the possibility that each one along a guide rail F ₁ to F ₁ displaces the balancing devices as soon as the associated one can be pushed. The guide rails run parallel to one another, nibs at the end of the registration strip, and the pen holders are automatically switched off in order to protect the writing devices in their zero position at the left end of the guide. This will appear in a row. Achieved on the holders .H ₁ to H ₁ by that the Potentiometerschleif he 6 "cranked on are mounted with different colors Scream end of its deflection range against a Anbende nibs SF ₁ to SF _1, with impact-A of a mechanical actuator for their zero lines at the beginning of the scale of the Registrar, the switch S in the input of a measuring circuit strip abuts RS, according to the sensitivity of the inlet 40 and this switch opens. Corresponding adjustment devices arranged, closely next to- Furthermore, the case can be provided that for lie against each other, namely in the direction of adjustment increases the measurement accuracy with larger spander Nibs each the nib of the voltage values of the measuring voltage the zero point of the more sensitive adjustment device of the nib suppressed more insensitive adjustment device the less sensitive adjustment device. This can be done, for example, by counter-ordering. In this way, with a voltage circuit, an auxiliary voltage is used for measuring voltage measurement reach the source of the more sensitive adjustment device. In this way, there is a registry assigned Pen from its zero position by one tion the entire width of the register strip for the greater distance than the less sensitive measured values above the suppressed range for borrowed adjustment devices assigned writing 5 ° grouting, feathers. The writing device shown in Figure 2 differs only in so far from that in Figure 1 claims: shown, as the four pen holders next to each other on a single guide rail F an- 1. Registering measuring device are ordered with an over. 55 "several orders of magnitude extending measurement on the strip chart RS of figure 1 and 2 range span and a plurality of the same Meßsind shown some registrations from a mass value associated with writing devices delivered under spectrograph measured voltages. Schiedlicher measuring sensitivity, in particular for α During the registration ( Fig. 1) the pen has written measurement of the voltage values supplied by a mass spectrograph SF _{1 of} the compensation adjustment device I with 60, characterized by great sensitivity, an automatic value loop extending over the largest of a compensation recorder with several measuring voltages of the same measuring voltage extending over part of the strip width , whereby the maximum value can be easily recognized by adjusting devices of different meters, while those of the less sensitive sensitivity, their simultaneously driven adjusting device II, associated with a pen SF ₂ 65 writing device en on the same recording, according to the selected reduction of the measuring strips, the measuring voltage curve as an individual sensitivity delivers a measured value of correspondingly continuous lines of different measuring lower heights. The register the Abgleicheinrich- 'sensitivity on top of each other, lines III and IV of even lower sensitivity- 2. Recording measuring device according to claim 1, speed associated nibs SF ₅ and SF ₄₁ are characterized in that the nibs of the individual adjustment devices in their zero position at the start of the scale of the registration strip are close to each other and that in the direction of adjustment of the nibs each Nib of the more sensitive adjustment device of the nib of the less sensitive Adjustment device is upstream. 3. Registering measuring device according to claim 1 and 2, characterized in that the holder all nibs in their zero position one behind the other on parallel guide rails arranged and displaceable along these. 4. Registering measuring device according to claim 1 and 2, characterized in that the holder All nibs in their zero position close to each other on a single guide rail are arranged and displaceable along this. 5. Registering measuring device according to claim 1 to 4, characterized in that the nibs are cranked differently according to their respective zero position. 6. Registering measuring device according to claim 1 to 5, characterized in that the more sensitive Adjustment devices can be switched off automatically as soon as the associated nibs have reached the end of the scale of the registration strip. 7. Registering measuring device according to claim 1 to 6, characterized in that to increase the measuring accuracy at higher voltages is the zero point of the less sensitive adjustment devices is suppressed. 8. Registering measuring device according to claim 1 to 7, characterized in that the individual Write pens with different colors. Considered publications:
Swiss patent specification No. 273 121. 1 sheet of drawings © 809 527/216 5. 58