CONSTRUCTION AND CALIBRATION OF A HALL-EFFECT GAUSSMETER
Abstract
The design and construction of a laboratory gaussmeter for quick measurement of steady magnetic fields is described. The instrument was battery-powered. When used with a Siemens millivoltmeter as the indicating instrument, the gaussmeter has three ranges (7.5, 15 and 30 kilogauss full scale) with an accuracy of + or - 1%. The instrument is fully portable. A HewlettPackard VTVM can be used alternately as the indicator. This made six more ranges available, 3000, 1000, 300, 100, 30 and 10 gauss, with an accuracy of about + or - 5%. Ranges of 3 and 1 gauss can be used for rough field estimates only. The VTVM requires line power. The In-As probe had good temperature stability and integrated over an area as small as 2 sq mm. The meter incorporates a probe current stabilization circuit to reduce the scatter in field mapping. In the upper ranges, the meter was calibrated against a nuclear magnetic resonance gaussmeter. Calibration curves are presented and should be referred to if the meter is used for accurate measurements. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1961
- Accession Number
- AD0271506
Entities
People
- Karl Strnat
- Robert A. Wolf