GB629723A - Improvements in or relating to electrical measuring instruments - Google Patents
Improvements in or relating to electrical measuring instrumentsInfo
- Publication number
- GB629723A GB629723A GB2520847A GB2520847A GB629723A GB 629723 A GB629723 A GB 629723A GB 2520847 A GB2520847 A GB 2520847A GB 2520847 A GB2520847 A GB 2520847A GB 629723 A GB629723 A GB 629723A
- Authority
- GB
- United Kingdom
- Prior art keywords
- potentiometer
- valve
- meter
- condenser
- grid
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
Abstract
629,723. Inductance and capacitance measurements. MARCONI INSTRUMENTS Ltd., and WRAY, A. G. Sept. 15, 1947, No. 25208. [Class 37] A Q-meter comprises a source of oscillations 1 coupled over a tapped inductance 4 to a circuit including the element under test (L or C) and tuned to resonance by a, condenser 12, the input and output voltages being rectified at 14, 10 and supplied to a device 15, 23 for indicating when they are equal, calibrated attenuating means 18 being included in one path. In operation, the condenser 12 is adjusted to give a maximum output and potentiometer 18 is then adjusted to give a null reading on the meter 23, the Q-value being read off potentiometer 18. The adjustable potentiometer may be between detector 14 and valve 15, and the meter may be between the anodes of valve 15, Fig. 2, not shown. In this latter case, the output from detector 10 may be mixed with that from the potentiometer and applied to one grid of valve 15, the other grid being earthed, Fig. 3, not shown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2520847A GB629723A (en) | 1947-09-15 | 1947-09-15 | Improvements in or relating to electrical measuring instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2520847A GB629723A (en) | 1947-09-15 | 1947-09-15 | Improvements in or relating to electrical measuring instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB629723A true GB629723A (en) | 1949-09-27 |
Family
ID=10223972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2520847A Expired GB629723A (en) | 1947-09-15 | 1947-09-15 | Improvements in or relating to electrical measuring instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB629723A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3359490A (en) * | 1964-06-03 | 1967-12-19 | Western Electric Co | Systems for testing the tolerances of capacitive values of capacitors |
-
1947
- 1947-09-15 GB GB2520847A patent/GB629723A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3359490A (en) * | 1964-06-03 | 1967-12-19 | Western Electric Co | Systems for testing the tolerances of capacitive values of capacitors |
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