ETS-Lindgren HI-3624(A) Survey Meter - Manual (Page 13)

Practical Application and Use | 13
4.0 Practical Application and Use
Before operating any components, follow the
safety information in the ETS-Lindgren
Product Information Bulletin included with your
shipment.
Example Application
Power Lines
Magnetic fields near overhead power lines can be easily measured with the
HI-3624A. An approach commonly used to characterize power line fields is to
measure the flux density along a straight line which passes perpendicular to the
power line. Generally, readings are first taken along the length of a span of the
power line to identify the point at which the greatest flux density exists. Then at
this point take the readings perpendicular to the power line. Take readings every
five to ten feet and orient the sensor for maximum reading. A magnetic field flux
density profile can then be developed. This method is outlined by the Institute of
Electrical and Electronics Engineers (IEEE) in the American National Standards
Institute (ANSI) standard 644 1987
A similar approach may be used for measuring the flux density produced by
buried lines. In this case, the area must be explored by walking about with the
meter, simultaneously moving the sensor in various orientations, until the region
of maximum flux density is found.