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ETS-Lindgren HI-3624(A) Survey Meter User Manual

Page 12

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Specifications

Instrument accuracy is derived from a field calibration using a one meter

diameter pair of Helmholtz coils for establishing an accurately known magnetic

field flux density. A precisely controlled and measured sinusoidal current is driven

through the Helmholtz coils and, based on the dimensions of the coils; the

magnetic field flux density between the coils in milligauss (mG) is calculated.

While the HI-3624A indicates magnetic flux density (B) in units of milligauss, the

flux density in microtesla or magnetic field strength (H) in milliamperes per meter

may be obtained via the following relations:

1 microTesla = 10 mG

1 mG = 80 milliamperes per meter (mA/m)