CN2127790Y - Data maintainer of digital pressure-tight tester - Google Patents
Data maintainer of digital pressure-tight tester Download PDFInfo
- Publication number
- CN2127790Y CN2127790Y CN 92222532 CN92222532U CN2127790Y CN 2127790 Y CN2127790 Y CN 2127790Y CN 92222532 CN92222532 CN 92222532 CN 92222532 U CN92222532 U CN 92222532U CN 2127790 Y CN2127790 Y CN 2127790Y
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- China
- Prior art keywords
- data
- digital
- pressure
- panel meter
- digital pressure
- 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
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model provides a novel data maintainer of a digital pressure-tight tester. The data tested by the digital pressure-tight tester is displayed by a digital panel meter which adopts the single-chip CC7107 31/2 bit double integral A/D convertor to be used as LED display. An automatic short circuit switch is connected in series between the 40 pin of the CC7107 and the anode of the power supply. When a sample generates disruptive discharge, the automatic short circuit switch acts to make the clock oscillator of CC7107 stop oscillation and the A/D conversion stopped. The data displayed on LEDs is still the data converted last time. The automatic maintenance of data is realized.
Description
The utility model relates to the pressure-resistant tester technical field.
Pressure-resistant tester is the detection article, equipment, the instrument of the performance of device and other article tolerance interchange or DC voltage, at present, homemade pressure-resistant tester majority is to adopt needle dc voltmeter or reometer to show various test datas, for example " up-to-date practical electronic measuring instrument ", aircraft industry publishing house publishes, in September, 1988 first published, the CJ2670 type Hi-pot Tester of the 644th page of introduction, the automatic omnipotent puncture device of CY2672 type of the 645th page of introduction etc. all is directly to show test data with pointer instrument, the weak point of this type of pressure-resistant tester is, indication reading when the indication pointer can not remain test product generation disruptive discharge, therefore, can not be on instrument reading exactly, personal error is bigger, trial voltage in the time of can not writing down test product generation disruptive discharge exactly, data such as high pressure leakage current, influence the continuous development of measuring accuracy along with electronic technology, the instrument factory that has has begun to adopt integrated digital pressure-resistant tester to replace pointer pressure-resistant tester, directly show every test data by digital panel meter, for example, the digital pressure-resistant tester series of products that Sichuan Province Neijiang City Instruments Factory produces just belong to this type of instrument, and promoting the use of to developing the simple data hold that is suitable for of it provides advantageous conditions.This digital pressure-resistant tester selects for use a kind of integrated circuit (IC) chip-31/2 double integration A/D converter chip of CC7107 monolithic the most cheap and that consumption is the widest to be used as the digital panel meter that LED shows, its precision is higher, but maximum defective is this chip data maintenance function is not set.
The purpose of this utility model provides the data hold of digital pressure-resistant tester, and when test product produced disruptive discharge, the data on the digital panel meter can remain the numerical value when puncturing.
The data hold of digital pressure-resistant tester described in the utility model has a digital pressure-resistant tester, and the data Vi of digital pressure-resistant tester institute test article shows with digital panel meter.The clock oscillation that is characterized in digital panel meter is with being in series with the automatic short-circuit switch between the tie point A of the resistance R 1 of RC network and capacitor C 1 and the positive source.
The better technical scheme of the utility model is, digital panel meter adopts 31/2 double integration A/D converter chip of CC7107 monolithic as the digital panel meter that LED shows, is in series with normally opened contact J1 by the control of high-voltage breakdown relay between its 40 pin (A point) and the positive source as the automatic short-circuit switch.
After adopting the data hold of digital pressure-resistant tester described in the utility model, its advantage is, directly show test data with digital panel meter, reading exactly, error is less, particularly when test product produced disruptive discharge, the data on the digital panel meter were maintained, the data when writing down test product generation disruptive discharge exactly for the tester.
With reference to the accompanying drawings the utility model is done and described in further detail.
Fig. 1 data hold circuit diagram
With reference to Fig. 1, the data hold of digital pressure-resistant tester described in the utility model, one digital pressure-resistant tester is arranged, the data Vi of numeral test product that pressure-resistant tester is tested shows with digital panel meter 1, digital panel meter can select for use 31/2 double integration A/D converter chip of CC7107 monolithic to be used as the digital panel meter that LED shows, the clock oscillation of digital panel meter is 40 pin of CC7107 chip with the resistance R 1 of RC network and the tie point A(of capacitor C 1) and positive source between be in series with automatic short-circuit switch 2, automatic short-circuit switch 2 preferably select for use the high-voltage breakdown relay a pair of normally opened contact J1, when test product produces disruptive discharge, the high-voltage breakdown actuating of relay, its normally opened contact J1 closure, 40 pin (A point) of CC7107 chip are connected with the positive source short circuit, the clock oscillator failure of oscillation, because the A/D of digital panel meter CC7107 conversion all working all carries out under time clock control, therefore, behind the clock oscillator failure of oscillation, the A/D conversion stops, the light-emitting diode display content displayed is always the interior data of latch that last A/D conversion remains, and the data when realizing high-voltage breakdown thus keep automatically.
Claims (2)
1, the data hold of digital pressure-resistant tester, one digital pressure-resistant tester is arranged, the data Vi of numeral test product that pressure-resistant tester is tested is with digital panel meter [1] demonstration, and the clock oscillation that is characterized in digital panel meter is with being in series with automatic short-circuit switch [2] between the tie point A of the resistance R 1 of RC network and capacitor C 1 and the positive source.
2, the data hold of digital pressure-resistant tester according to claim 1, it is characterized in that digital panel meter ［ 1 ］ adopts 31/2 double integration A/D converter chip of CC7107 monolithic as the digital panel meter ［ 1 ］ that LED shows, be in series with normally opened contact J1 by the control of high-voltage breakdown relay between its 40 pin (A point) and the positive source as automatic short-circuit switch ［ 2 ］.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92222532 CN2127790Y (en) | 1992-05-27 | 1992-05-27 | Data maintainer of digital pressure-tight tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92222532 CN2127790Y (en) | 1992-05-27 | 1992-05-27 | Data maintainer of digital pressure-tight tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2127790Y true CN2127790Y (en) | 1993-03-03 |
Family
ID=33768877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92222532 Expired - Fee Related CN2127790Y (en) | 1992-05-27 | 1992-05-27 | Data maintainer of digital pressure-tight tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2127790Y (en) |
-
1992
- 1992-05-27 CN CN 92222532 patent/CN2127790Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |