User Manual
Table Of Contents
- Limited Warranty, Limitations Of Liability And Restrictions
- Garantie limitée, limites de responsabilité et restrictions
- FCC Notice (for U.S. Customers):
- (a) UWB imaging systems require coordination through the FCC before the equipment may be used. The operator shall comply with any constraints on equipment usage resulting from this coordination.
- Or
- Frequency Coordination Branch, OET
- ATTN: UWB Coordination
- Canadian Requirements for RSS-220
- Canadian Requirements of RSS-220 for Ground Antennas
- Canadian Requirements of RSS-220 for Hand-held Antennas
- Canadian Requirements of RSS-220 for Search and Rescue Antennas
- Table of Contents
- Section 1: Introduction 1
- StructureScan™ Mini XT 2
- Section 2: Getting Started 3
- Section 3: Using ScanEZ Mode 5
- Section 4: Using the Scan3D App 10
- Section 5: Using the ScanMax App 14
- Section 6: Calibrating for Depth in the ScanMax App 20
- Section 7: Using the DualScan App 23
- Section 8: File Management 26
- Setting up Your Laptop/PC and Data Transfer 27
- Launching and Navigating the Software 28
- Viewing and Processing the Data 30
- Processing the Data 32
- Ribbon Options 34
- Home Ribbon Options 34
- 3D Volume Options Ribbon 40
- Chapter 1: Using the StructureScan Mini XT
- Section 1: Introduction
- StructureScan™ Mini XT
- Section 2: Getting Started
- Section 3: Using ScanEZ Mode
- Section 4: Using the Scan3D App
- Section 5: Using the ScanMax App
- Section 6: Calibrating for Depth in the ScanMax App
- Section 7: Using the DualScan App
- Section 8: File Management
- Chapter 2: Using RADAN for StructureScan Mini
- Setting up Your Laptop/PC and Data Transfer
- Launching and Navigating the Software
- Viewing and Processing the Data
- Processing the Data
- Ribbon Options
- Home Ribbon Options
- 3D Volume Options Ribbon
- Appendix A: The Dielectric Constant
- Appendix B: Data Interpretation and Examples of Common Features
- Appendix C: Technical Specifications
- Appendix D: Accessories
- Appendix E: Labeling
Geophysical Survey Systems, Inc. StructureScan™ Mini XT
Manual
MN 70-813 Rev C 41
Appendix A: The Dielectric Constant
What is it? The dielectric constant is number used in GPR to describe how fast the GPR energy moves
through a non-metallic material. GPR waves move so fast (almost the speed of light) that it is not
practical in most cases to use familiar units like miles or kilometers per hour, so we use the dielectric as
an easier method. The range of values goes from 1 (air, the fastest) to 81 (water, the slowest). All of the
concretes, asphalts, rocks, soils, and sediments fall between those extremes.
Why is it important? GPR doesn’t record depth. It records time of flight. That is the elapsed time
between the antenna sending out the RADAR pulse and then receiving the reflection. Since we know for
how long the pulse traveled, if we can calculate the speed at which it traveled, we can calculate how far
(deep) it went.
How do I know the Dielectric Constant? You can start off by estimating the number based on the age
of the slab. That is what the chart below is for. The Mini XT also has a function called Auto Depth in the
ScanMax app which will automatically calculate the value for you. Please see Section 5 for more
information on calculating the dielectric.
Concrete Type
Dielectric Constant
Concrete Age
Comments
Very Dry
4.59
5 years +
The driest
slabs
Mod. Dry
6.25
At least 1 year
Most slab on
grade will be
Mod. Dry
Damp
7.44
3-12 months
Moist
9
1-3 months
Slab under
water all of the
time
(swimming
pool, water
tank)
Wet
14.06
Less than 1 month
Please note that these values are approximations.