EM61-MK2A Survey Setup Menu
Configure the EM61-MK2A Survey Setup Menu on the TK6000.
1. Using the stylus, select the EM61-MK2A Survey Setup Menu.
2. Select the EM61 Mode
from its Dropbar Menu. There are three options: auto, wheel, and manual. In Auto Mode, readings will be automatically recorded at a specified frequency. In Wheel Mode, readings are triggered at intervals determined by the user and an odometer at the EM61’s wheel base. In the Manual Mode, readings are manually triggered by the user.
If the user selects the Auto Mode, he must select the number of Reading /s. The Reading /s Field is the number of readings the EM61-MK2 will take per second on a scale of 1 to 16. This option is “Not Available” if the user selects a different mode.
3. The Survey Line is the name given to each survey line.
Generally these are coordinates of a line in the survey grid. If the user names the Survey Line by a number, the EM61-MK2 program will automatically name each subsequent line a new number based on the Line Increment. The Line Increment is the distance in which Survey Lines will be from one another. For example, if the first Survey Line is named 2.50, for Y=2.5 on the survey grid, and the Line Increment is 2.50, the proceeding lines will be named 5.00, 7.50, 10.00, and so on. In this example, the Start Station and station positions shown during data acquisition would represent a X coordinate along the survey line.
4. The Sequence Field
determines whether the user is going to conduct each survey line in the same direction (One Way) or alternate the direction of each line (Alternate). Data acquired on a grid is often acquired using the Alternate setting.
5. Select the Line direction
(North, West, South, East) that the EM61 cart will survey on the first line. If the Sequence is One Way, this setting will stay the same for each data line. If the Sequence is Alternate, the EM61-MK2 will automatically switch the directions for each line with the user’s approval. If in doubt and the survey is conducted using a grid, it often works out well for North to represent the direction towards greater positive Y values and East to represent the direction of increasing X values.
6. The Start Station Field is the starting station
number for each line. For instance, if the operator is using the imperial measuring system and starting at X=5 feet away Y axis, the operator may want to put in a measurement of 5.00 or take good notes (or both).
If in the Auto Mode or Manual Mode, the user needs to select a Station Increment. In Auto Mode, the Station Increment field is, in essence, the “reading” increment and may be set to 1 to display the number of measurements acquired. In the Manual Mode it represents the distance between stations along a survey line. Once again, if the value is set to 1, the distance along a survey line represents the number of readings recorded. This value is also used with the Start Station Field to display information with graphics. If in the Wheel Mode, instead of a Station Increment, there will be a Wheel Increment. The Wheel Increment determines readings depending on how far the EM61 has traveled via odometer. The wheel increment is often approximately 20 cm; however, one needs to read the lesson on calibrating the measuring wheel, to yield greater accuracy along a line.
7. After changing the EM61-MK2 Survey Setup Menu options, it is important to save.
Tap the OK Button to save. After tapping the OK Button, it is safe to click on the X Button to exit. If the user exits without using the OK Button, the changes will not be saved.