JPS62170855A - Tester - Google Patents

Abstract

PURPOSE:To execute a measurement by a display means being suitable for the quantity of electricity to be measured, by using one set of tester, by providing both a pointer type indicator and a digital display part, as a display part. CONSTITUTION:An input to be measured is switched to a DC-DC converting part 3 in case of measuring a DC voltage, an AC-DC converting part 4 in case of measuring an AC voltage, a resistance converting part 5 in case of measuring a resistance value, and a current converting part 6 in case of measuring a current, by an input range switching part 2 through an input part 1. Also, the outputs of the respective converting parts are displayed on a pointer type indicator 7, and also, an analog-to-digital conversion is executed by an A/D converter 8, and displayed on a digital display part 9. In this way, a signal which is varied instantaneously can see intuitively the varied state of its signal by the pointer type indicator 7, and a stable signal can be measured in an exact numerical value by the digital display part 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a tester with improved means for displaying measured values during electrical measurements.

[Technical Background of the Invention and Its Problems] Figures 2 and 3 show examples of the configuration of testers commonly used in the past. As shown in Figure 2, the tester has an input section 1, an input/range switching section 2 that switches the type of input and the measurement range, and a signal that converts into a signal that can cause the pointer type indicator to swing depending on the type of input. D to do
C-DC converter 3, AC-DC converter 4. Resistance converter 5. It is composed of a current converter 6 and a pointer-type indicator 7 that displays its value. In addition, in FIG. 3, input section 1. Input/range switching section 2 and each conversion section 3,
4, 5.6 are similar to those shown in FIG. 2, but instead of the pointer-type indicator 7, they are composed of an A/D conversion section 8 and a digital display section 9 for digitally displaying values.

In other words, the input to be measured is input/range switching section 2.
Accordingly, in the case of DC voltage measurement, the DC-DC converter 3. In the case of AC voltage measurement, the switch is switched to the AC-DC converter 4, in the case of resistance value measurement, the switch is switched to the resistance converter 5, and in the case of current measurement, it is switched to the current converter 6, and the output of each converter is as shown in Fig. 2. In the case of the pointer type indicator 7 and FIG. 3, the signals pass through the A/D converter 8 and are displayed on the digital display 9, respectively.

By the way, the advantage of the pointer type indicator method is that for signals that change instantaneously, you can intuitively see how the signal changes, and you can intuitively read how much the overall level has fluctuated. It is easy to understand the maximum value of change, etc. Furthermore, even when performing unstable measurements, the state of change and approximate values can be read intuitively. On the other hand, the drawback is that because it is a pointer type, it is difficult to read the indicated value accurately, and there are also differences due to individual differences, and the value or unit can be read incorrectly.

On the other hand, the advantage of the digital display method is that the numerical values can be read directly, so there is no difference between individuals when it comes to stable signals, and more accurate numerical values can be measured compared to the pointer type indicator method.

Also, it is difficult to misread values or units. On the other hand, the disadvantage is that when measuring instantaneously changing signal conditions or unstable signals, the values change constantly and are difficult to read.

Generally, a tester is used to check the state of the signals in each part, and the signals may be constant or changing. Therefore, in the past, one of the disadvantages had to be sacrificed, or if both were required, two methods were used: the pointer type indicator method and the digital display method.
I had to prepare one.

In this way, conventional testers have different types, one with a pointer type indicator and the other with a digital type, and depending on the measurement signal, there are cases where a pointer type indicator is optimal and cases where a digital display is optimal. , it was inconvenient to use them properly.

[Purpose of the Invention] The present invention provides a pointer type indicator and a digital display in the display section of a tester, so that measurements can be performed using a display means suitable for the measurement signal using one tester. purpose.

[Summary of the Invention] The present invention provides a tester that inputs a quantity of electricity to be measured and displays the measured value on a display section via an input/range switching section and a signal conversion section. A display section is also provided so that measurements can be made using a display means suitable for the quantity of electricity to be measured.

[Embodiment of the invention] FIG. 1 shows an embodiment of the present invention. In FIG. 1, the same reference numerals as in FIGS. 2 and 3 indicate the same or corresponding parts, The difference from FIG. 3 is that the display section includes both a pointer-type indicator and a digital display.

That is, as shown in Figure 1, the input to be measured is
Through the input section 1, the input/range switching section 2 converts the DC-DC converter 3 in the case of DC voltage measurement and the AC-DC converter 4 in the case of AC voltage measurement. In the case of resistance value measurement, the switch is switched to the resistance converter 5, and in the case of current measurement, the switch is switched to the current converter 6.The output of each converter is displayed on the pointer type indicator 7, and the analog-to-digital conversion is performed by A/D. This is performed by the D conversion section 8 and displayed on the digital display section 9.

It goes without saying that the present invention can be widely applied to electric measuring instruments such as ammeters and voltmeters that have pointer type or digital display type.

[Effects of the Invention] As explained above, according to the present invention, (1) the drawbacks of the digital display method and the pointer type indicator method can be compensated for. (2) Depending on the content of the measurement signal, there is no need to consider whether to use a fingernail indicator type tester or a digital display type tester. (3) Effects such as the ability to use only one device instead of two, a pointer type and a digital display type, are obtained, and this effect also improves measurement accuracy.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a tester in which a pointer-type indicator and a digital display are housed in one unit, showing one embodiment of the present invention.
The figure shows a general block diagram of a pointer-type indicator type tester, and FIG. 3 shows a general block diagram of a digital display type tester. 1... Input section, 2... Input and range switching section, 3
...DC-DC converter, 4...AC-DC converter,
5... Resistance conversion unit, 6... Current conversion unit, 7... Pointer type indicator, 8... A/D conversion unit, 9... Digital display unit.

Claims (1)

[Claims] In a tester that inputs the quantity of electricity to be measured and displays the measured value on the display section via the input/range switching section and the signal conversion section, the above-mentioned display section is equipped with a pointer-type indicator and a digital display. Featured tester.