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Geometrics G-858BP User Manual

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G-858BP Backpack Mag Operators Manual
To convert these back to normal EM-61 values you simply calculate:
Y = 4(X-50000)/125
Where:
X is the reported value in nT
Y is the correct EM-61 value
MagMap2000 does not yet contain this calculation.
When using the G859 to log EM-61 data you may notice that the displayed numbers move in a
more stepwise manner than it does when recording magnetic fields. This is normal. The EM-61 reports a
16 bit integer for its reading. When these are multiplied by the correct factors for each of the gains this
causes the resulting values to move in increments as shown below.
15.0000 * 4/125 = 0.480
0.7500 * 4/125 = 0.024
3.7500 * 4/125 = 0.120
0.1875 * 4/125 = 0.006
98

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Geometrics G-858BP Specifications

General IconGeneral
BrandGeometrics
ModelG-858BP
CategoryMeasuring Instruments
LanguageEnglish

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