GSSI SIR 20, User Manual

Page: 59 / 100

Geophysical Survey Systems, Inc. SIR® 20
Manual
MN92-078 Rev F 53
Important Note:
If you have a blue metal minicart and are using it with a Model 5100B or 5101 (orange
padded bag), you must hold down the red deadman switch on your cart to continue operation. If you do
not hold down the switch , the antenna transmitter will not turn on and you will get a flat signal.
•
Click Run to move on to the next setup screen.
Figure 54: Incorrect and Correct Signal.
3
If your scan/trace looks like the image at the left of Figure 54, you will need to reinitialize. Hold
down the red deadman switch on the minicart’s handle and click the re-initialize button once. After a
few seconds you will see the scan line change to the image on the right. Click the Collect Data button
(F8) to begin data collection.
4
Move your minicart forward in a straight line; you will see the data appear on the screen as the
minicart wheels turn.
Note:
Make sure the wheels of the cart are always in contact with your survey surface. Sometimes when
collecting data over a carpeted or dirty floor, the survey wheel slips. Since your system is only collecting
data when the wheels are turning, wheel slippage will result in gaps in your data.
During Collection
SS Linescan is equipped with a Backup Cursor to aid you in easily relocated objects that you see in the
radar data. Move handcart back along survey line just collected. You will see a vertical (distance) cursor
move as you move the handcart, enabling easy in-field feature marking.
Note:
The cursor’s location is the center of the antenna. The center is noted as a small vertical
indentation on the side on the orange plastic antenna housing.