JPS5756761A - Input and output insulation type voltage(current) measuring device - Google Patents
Input and output insulation type voltage(current) measuring deviceInfo
- Publication number
- JPS5756761A JPS5756761A JP55131948A JP13194880A JPS5756761A JP S5756761 A JPS5756761 A JP S5756761A JP 55131948 A JP55131948 A JP 55131948A JP 13194880 A JP13194880 A JP 13194880A JP S5756761 A JPS5756761 A JP S5756761A
- Authority
- JP
- Japan
- Prior art keywords
- output
- cpu5
- input
- voltage
- stored
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
PURPOSE:To read measurement signals accurately over a wide range by storing the input and output characteristic data of a photocoupler beforehand automatically in a temporary storage element of a microprocessor at the turning on of an eletric power source or prior to measurement, and calibrating the output of the photocoupler automatically by utilizing these. CONSTITUTION:When the electric power source switch of the measuring device is turned on, a CPU5 drives a relay constituting a signal changing part, thereby changing relay contacts to 11a side. Next, the CPU5 passes the digital quantity stored in a program memory 6 through a D/A converter 8 and a driving circuit 1 and applies analog quantity A1 to a photocoupler 2. At this time, an output B1 is obtained. This value is read via an A/D converter 4 by the CPU5 and is stored in an RAM7. Next, the CPU5 applies another date successively, and stores the same in the RAM7 in the same manner so that the input and output characteristics of the coupler 2 are stored. Next, the contscts of the relay 11 are changed over to the side of the current and voltage to be measured, and thereafter, the CPU knows input voltage from the output voltage of the coupler 2 from the characteristic chart stored in the RAM7 thereby knowing the correct current and voltage to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55131948A JPS5756761A (en) | 1980-09-22 | 1980-09-22 | Input and output insulation type voltage(current) measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55131948A JPS5756761A (en) | 1980-09-22 | 1980-09-22 | Input and output insulation type voltage(current) measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5756761A true JPS5756761A (en) | 1982-04-05 |
Family
ID=15069946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55131948A Pending JPS5756761A (en) | 1980-09-22 | 1980-09-22 | Input and output insulation type voltage(current) measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5756761A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4837504A (en) * | 1985-05-02 | 1989-06-06 | Zellweger Uster Ltd. | Electricity meter and method of calibrating same |
| US9250299B1 (en) | 2009-08-28 | 2016-02-02 | Cypress Semiconductor Corporation | Universal industrial analog input interface |
-
1980
- 1980-09-22 JP JP55131948A patent/JPS5756761A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4837504A (en) * | 1985-05-02 | 1989-06-06 | Zellweger Uster Ltd. | Electricity meter and method of calibrating same |
| US9250299B1 (en) | 2009-08-28 | 2016-02-02 | Cypress Semiconductor Corporation | Universal industrial analog input interface |
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