A SETUP FOR LINEARITY MEASUREMENT OF AC VOLTMETERS IN THE AUDIO FREQUENCY RANGE
Abstract
A setup for the measurement of linearity of precision ac voltmeters in the audio frequency range is described. The setup is based on an inductive voltage divider (IVD) as linearity standard. Since the IVD is calibrated under no-load conditions, the setup is provided with a compensation of the loading current absorbed by the voltmeter. The compensation is automated and based on a commercial lock-in amplifier. As examples, measurements of the linearity of two top-class ac voltmeter (a J. Fluke 5790A and a Datron Wavetek 4920) are reported.
Event details
- Event
- Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
- Technical Committee
- TC4
- Place
- Florence, ITALY
- Time
- 22 September 2008 - 24 September 2008
- Website
- http://www.imeko2008.org/