BARTINGTON INSTRUMENTS
Page 14 of 32 OM2020/5
6. Taking Measurements
This section describes the procedures for measurement of Declination and Inclination in the
null mode. Four readings are obtained for calculation of D and four readings are obtained
for calculation of I. Each set of four comprises two pairs of readings. One pair is averaged
to eliminate electronic offset errors and the other pair is averaged to eliminate mechanical
alignment errors (probe collimation).
Figure 4 describes the conventions in making observations for identifying the directions of
observation when performing null mode measurements. Figures 5 and 6 give further details of
the null mode of measurements.
Figure 4. Plan view of observation positions for D & I
Summary of Contents for Mag-01H
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