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EM61LX2 Data Logging System (DAS70-AR2)
2. Survey Setup
The Survey Setup dialog, presented below, contains several parameters which affect two important
procedures: instrument settings (frequency of data collection) and survey geometry layout (survey
line names, line spacing, start station, station increment, etc.).
Description of Options and Parameters:
Readings/s
This parameter describes number of readings per second that will be taken.
Any number larger than zero can be entered, however in this EM61-LX2 model the hardware
fixed frequency of data output is 18 readings per second. Any entered value is rounded to
the nearest possible base frequency of the instrument, i.e. user specified frequency of 14
or more readings/s will result in the effective data acquisition rate of 18 readings/s (every
reading is logged), 10 readings/s will cause the program to log at a rate of 9 readings/s (ev-
ery second reading from instrument output is logged), etc. At slower rates the difference
between specified and effective frequencies is negligible.
Survey Line
(survey line name)
Activate text box by tapping or using TAB key and then enter desired name (number) for
the survey line.
This is a user’s tag number/name for the profile line. The length of the name can not exceed
8 characters. The line name is usually used as a coordinate perpendicular to the survey lines
direction. For example, when survey lines are laid out along W-E direction stations describe
W-E coordinate, while Line names may describe S-N (vertical on a map) coordinate.
Line Incr.
(survey line name)
Activate text box by tapping or using TAB key and then enter desired for the survey line
increment.
This parameter specifies the distance by which survey lines will be separated. This setting
will be used to determine number (name) of the next survey line.