ETS-Lindgren HI-3627 ELF Magnetic Field Meter - Manual (Page 12)

Page -- 4 HI-3627 Manual
Sensitivity:
Full scale ranges of:
2 mG
20 mG
200 mG
2 G
20 G
Accuracy:
± 5 % at calibration frequency
Power:
One 9.6 volt NiCad battery
Battery life:
Approximately 30 Hrs. continuous operation
(new battery with a full charge)
Linearity:
± 2% Full Scale
The instrument is calibrated 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 is calculated.
While the HI-3627 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 mG = .1 microtesla ( : T)
1 mG = 80 milliamperes per meter (mA/m)