ENVI PRO OPERATION MANUAL - Scintrex

Operating Displays
CHART
SCALE
AUTO
TUNE
BASEFIELD
5—7
Entering 0 (zero) results in a reading
interval equal to the reading time.
The instrument goes to “sleep”
between readings, for 4 seconds and
up.
The sensitivity for the analog output
for the strip chart recorder.
The following choices are available:
1, 10, 100, 1000, 10000 nT.
A “yes/no” toggle that controls the
automatic tuning function.
It is independent for the Total-field
sensor and the Gradiometer sensor.
The tuning value is updated after
each reading in preparation for the
next one.
Auto tuning is particularly applicable
if large variations of the ambient field
are encountered over longer
distances.
Fixed tuning may be more
appropriate in areas of large cultural
electrical noise or very narrow, large
amplitude anomalies. These may
pull the tuning away from the desired
frequency to that of the interfering
frequency or to tuning field values
greatly different from the background.
As the setting of this parameter
depends upon your particular survey
conditions, it is not possible to
suggest the best setting. The mode
should therefore be established by
experimenting. In general it is more
applicable to use fixed tuning for the
site characterization and drum
location modes.
The base field is used in conjunction
with the base-station correction
procedure.
The base-station correction
technique removes variation in the
ambient field during the time that the
base station is running. However,
variations taking place from day to
day are not corrected. The base field
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No
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P/N 788715 Rev. 0