JPS5763461A - Device for testing watermeter - Google Patents
Device for testing watermeterInfo
- Publication number
- JPS5763461A JPS5763461A JP13813280A JP13813280A JPS5763461A JP S5763461 A JPS5763461 A JP S5763461A JP 13813280 A JP13813280 A JP 13813280A JP 13813280 A JP13813280 A JP 13813280A JP S5763461 A JPS5763461 A JP S5763461A
- Authority
- JP
- Japan
- Prior art keywords
- calculated
- measurement
- average power
- microcomputer
- wattmeter
- 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
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
Abstract
PURPOSE:To perform more accurate measurements than analog devices, by a tester wherein power of an electric power system is measured in a digital manner and average power measured at the same time by a wattmeter to be tested is calculated by the same device used for the digital measurement, thereby to display a difference between both the results. CONSTITUTION:A microcomputer 8 judges the presence or absence of a level change of a pulse signal from a test pulse detector 6 every when a pulse signal from a reference time generator 5 is input to a parallel data detector 7. When the level change is detected, a sample value is latched from a point between A-D converters 3, 4 and the detector 7. Then the product of voltage and current is calculated, thus obtained products are added and the times of such addings are counted. The measurement is completed after given times of operations are performed. Average power obtained by this measurement within a certain measuring time is calculated on the basis of data stored in the microcomputer 8. The microcomputer 8 displays in a digital manner a difference between thus calculated average power and average power measured by a wattmeter 10 to be tested. By so doing, a reference wattmeter is not required and the more accurate measurement can be performed comparing with the prior device in which power is computed by multiplying in an analog manner.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13813280A JPS5763461A (en) | 1980-10-02 | 1980-10-02 | Device for testing watermeter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13813280A JPS5763461A (en) | 1980-10-02 | 1980-10-02 | Device for testing watermeter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5763461A true JPS5763461A (en) | 1982-04-16 |
Family
ID=15214727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13813280A Pending JPS5763461A (en) | 1980-10-02 | 1980-10-02 | Device for testing watermeter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5763461A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59104575A (en) * | 1982-12-08 | 1984-06-16 | Osaki Denki Kogyo Kk | Induction type watt-hour meter testing device |
JPS59104576A (en) * | 1982-12-08 | 1984-06-16 | Osaki Denki Kogyo Kk | Induction type watt-hour meter testing device |
JPS59126972A (en) * | 1983-01-10 | 1984-07-21 | Osaki Denki Kogyo Kk | Testing device of induction type watthour meter |
JPS6111680A (en) * | 1984-06-28 | 1986-01-20 | Keihin Densokuki Kk | Testing device for normal watt-hour meter instrument error |
JPS61105870U (en) * | 1984-12-18 | 1986-07-05 | ||
JPS6416978A (en) * | 1987-07-13 | 1989-01-20 | Toshiba Corp | Testing device for watthour meter |
-
1980
- 1980-10-02 JP JP13813280A patent/JPS5763461A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59104575A (en) * | 1982-12-08 | 1984-06-16 | Osaki Denki Kogyo Kk | Induction type watt-hour meter testing device |
JPS59104576A (en) * | 1982-12-08 | 1984-06-16 | Osaki Denki Kogyo Kk | Induction type watt-hour meter testing device |
JPH0321076B2 (en) * | 1982-12-08 | 1991-03-20 | Osaki Electric Co Ltd | |
JPS59126972A (en) * | 1983-01-10 | 1984-07-21 | Osaki Denki Kogyo Kk | Testing device of induction type watthour meter |
JPS6111680A (en) * | 1984-06-28 | 1986-01-20 | Keihin Densokuki Kk | Testing device for normal watt-hour meter instrument error |
JPS61105870U (en) * | 1984-12-18 | 1986-07-05 | ||
JPS6416978A (en) * | 1987-07-13 | 1989-01-20 | Toshiba Corp | Testing device for watthour meter |
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