Geophysical Survey Systems, Inc.
SIR® 4000
Manual
MN72-433 Rev F
78
7
Calibrate SW:
If you are surveying over unfinished concrete or another
rough surface it is recommended that you calibrate the survey wheel to
adjust for the uneven surface.
a)
Select calibration distance – The default distance is 10 in.
b)
Position Antenna on the Start mark – The antenna can be positioned
anywhere at the start as long as you use the same point on the
antenna when you stop.
c)
Press the green Start button on the keypad of the SIR 4000.
d)
Move antenna to the stop mark – This should match the same
location on the antenna where you started.
e)
Press the red Stop button on the keypad of the SIR 4000.
f)
Repeat Steps b)-e) at least twice to ensure that you get consistent calibration values.
g)
Select Apply to save the current calibration setting.
What is Preset
These are settings that you can customize in Expert Mode, but are preset in StructureScan2D.
•
Samples/Scan: 512
•
Filters (All)
•
Scans/Second: 333
•
Offset position
•
Gain: 3 point Auto
•
Surface position
The Dead-Man Switch
When using the blue cart or the Palm antenna with the SIR 4000 you’ll need to hold the Dead-Man
Switch on the cart or on the Palm antenna during setup and collection. If the Dead-Man Switch is not
engaged the system will only record noise.
•
If you see noise in Setup – Hold the Dead-Man Switch and press the Init control button. This will
reinitialize the antenna and you will see a signal.
•
If you see noise during Collection – Hold the Dead-
Man Switch and try to collect more data. At this point
you should start to see reflections; if you only see noise,
return to the Setup screen, hold the Dead-Man Switch,
and press the Init button. Then restart data collection.
StructureScan2D Data Collection
1
Hold the Dead-Man Switch, and press the green Start button. This will start data collection.
2
Continue to hold the Dead-Man Switch, and move the antenna forward over the line you’re
surveying.
Note
:
Before starting to collect data
ensure that you have a signal and
aren’t seeing noise in the Setup
screen.
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