GSSI MN73-190 Ground Penetrating Radar User Guide

: June 14, 2024
: GSSI

MN73-190 Ground Penetrating Radar

Product Information

Specifications

Model: Flex NX
Controller Model: FGFLEX NX
Transit Case Model: F-73-176
Wrist Lanyard Model: F-73-159
Battery Model: FGNX-BAT-3 CELL (2X)
Charger Model: FGMODBC-NX (2-Bay)
Quick Start Guide Model: MN73-190

What’s Included

Flex NX Controller (FGFLEX NX)
Transit Case (F-73-176)
Wrist Lanyard (F-73-159)
Lithium-Ion Battery (FGNX-BAT-3 CELL) x2
2-Bay Charger (FGMODBC-NX)
Quick Start Guide (MN73-190)

Optional Accessories

Telescoping Pole with RAM Grip – 0.5m-1.2m (1.7ft-4.0ft)
(FGNX-POLE)
NX25 Wireless Satellite Antenna (FGNX25)
NX25 Lithium-Ion Battery (FGNX-BAT-2 CELL) x2
Flex Vision Positioning System
Removable High-Capacity Lithium-Ion Battery

Flex NX Physical Features

External USB Port
User Replaceable Wheels with Individual Encoders
User Programmable Buttons for Power On/Off
Fully Adjustable and Removable Handle
360 degree range of horizontal motion
Limited vertical range of movement to prevent display
damage

Product Usage Instructions

Flex NX Handle Adjustment

Your Flex NX features a fully adjustable and removable handle.
To adjust, follow these steps:

Loosen the knob.
Reorient the handle to your desired position.
Tighten the knob to secure the handle in place.

To remove the handle:

Fully loosen the knob.
Remove the handle from the Flex NX.

Attaching the Telescoping Pole Accessory to Flex NX

To attach the Telescoping Pole Accessory (sold separately) to
the Flex NX, follow these steps:

Engage the locking pin and insert the right side of the pole,
with the locking pin to the left.
Insert the left side of the pole and disengage the locking
pin.

To remove the pole from the Flex NX, reverse the process.

Attaching the Telescoping Pole Accessory to NX25

To attach the Telescoping Pole Accessory (sold separately) to
the NX25, follow these steps:

Engage the locking pin and insert the right side of the pole,
with the locking pin to the left.
Insert the left side of the pole and disengage the locking
pin.

To remove the pole from the NX25, reverse the process.

Powering Flex NX

To power on the Flex NX, press both buttons simultaneously. To
power off, hold both buttons simultaneously.

Note: Ensure that the battery contacts are facing towards the
Flex NX and facing upward.

Inserting Battery into Flex NX

To insert the battery into the Flex NX, follow these steps:

Slide the battery door latch to the left to open the door.
Insert the battery in the orientation shown inside the battery
compartment.
Close the battery door and ensure that the door latch is fully
engaged by pushing it to the right.

Powering NX Accessory Antennas

To power on the NX accessory antennas, follow these steps:

Slide the battery latch lock forward.
Use a battery to push up on the battery latch to insert
it.

Note: The battery contacts should be facing towards the NX25 and
facing downward.

To power off, hold both buttons simultaneously.

Battery Ejection

To eject the battery from the Flex NX or NX25 using one
hand:

Use your thumb to press on the battery.
Use your index finger to slide the battery latch lock.
Pinch your fingers together to eject the battery.

Antenna / Laser Positions

The Flex NX incorporates two individual GPR antennas: a Standard
Orientation antenna (in front) and a Cross Polarized antenna (in
back).

Each antenna has three centered line lasers for highly accurate
markouts. The center of each antenna is marked with a colored
crosshair.

FAQ

Q: Where can I find more information about the warranty,

training, and technical support?

A: For more information about the warranty, training, and
technical support, please visit our website at www.geophysical.com.

Q: How can I access GSSI Academy classes?

A: GSSI Academy classes are offered on a revolving annual
schedule. You can check out the GSSI Academy offerings at www.geophysical.com /gssi-academy.

®
SIMPLE. FLEXIBLE. TRUSTED.

Flex NX Support

Quick Start Guide
MN73-190 Rev A

Have Questions?

We’ve Got Your Back
Our promise to you is to provide comprehensive training, unrivaled customer support and world class expertise. That’s why your Flex NX comes with our industry-leading two-year warranty, complimentary training, and technical support access. For more information, visit us at www.geophysical.com.
We’re Committed to Your Success
Our team of dedicated technical trainers is ready to work with users of all experience levels. GSSI Academy classes are offered on a revolving annual schedule. Check out the GSSI Academy offerings at www.geophysical.com/gssi- academy.

Flex NX Controller FGFLEX NX

Transit Case F-73-176

What’s Included

Wrist Lanyard F-73-159

Extra RAM® Mount RAM-238U

Lithium-Ion Battery (2X) FGNX-BAT-3 CELL

2-Bay Charger FGMODBC-NX

Quick Start Guide MN73-190

Optional NX Accessories

Telescoping Pole with RAM Grip – 0.5m-1.2m (1.7ft-4.0ft) For use with Flex NX and NX25 FGNX-POLE

NX25 Wireless Satellite Antenna FGNX25

NX25 Lithium-Ion Battery (2X) FGNX-BAT-2 CELL

Flex Vision Positioning System
Removable High-Capacity Lithium-Ion Battery

Universal RAM® (Size C) Handle Mount

Flex NX Physical Features

External USB Port

User Replaceable Wheels with Individual Encoders

User Programmable Buttons Power On/Off

Flex NX Handle Adjustment

Your Flex NX features a fully adjustable and removable handle. To adjust, simply loosen the knob, reorient the handle, and tighten. To remove the handle, fully loosen the knob.
360 degree range of horizontal motion.
Vertical range of movement is limited to prevent display damage.

Flex NX and NX25 Attachments

Attaching the Telescoping Pole Accessory (sold separately) to Flex NX.

The NX25 Pole Mount Adapter and Survey Wheel attachment locations are interchangeable. Note: They can only attach in orientations shown.
Engage the locking pin and insert the right side, with the locking pin to the left. Next, insert the locking pin side and disengage the locking pin. To remove, reverse the process.

Attaching the Telescoping Pole Accessory (sold separately) to NX25.

Powering Flex NX

Press both buttons to Power On. Hold both buttons to Power Off.
Note: Battery contacts toward Flex NX and facing upward.

Close the battery door and ensure that the door latch is fully engaged by pushing it to the right.

To insert the battery, slide battery door latch to left, and open the door. Insert the battery in the orientation shown.

Powering NX Accessory Antennas

Slide battery latch lock forward. Use battery to push up on the battery latch to insert. Note: Battery can only be inserted with battery contacts toward NX25 and facing downward.
Press both buttons to Power On. Hold both buttons to Power Off.
One-handed battery ejection: Use thumb to press on battery and index finger to slide the battery latch lock. Pinching fingers together will eject the battery.

Antenna / Laser Positions

Flex NX incorporates two individual GPR antennas: A Standard Orientation antenna (in front) and a Cross Polarized antenna (in back).
Each antenna has three centered line lasers for highly accurate markouts. The center of each antenna is marked with a colored crosshair.
Forward Direction

Scanning with both antennas produces a more detailed and informative view of concrete targets, especially for complex jobs.

Red Lasers at center points of Standard Antenna

Green Lasers at center points of Cross Polarized Antenna

Flex NX and its accessory antennas (sold separately) connect wirelessly using Tap-to-Connect Near Field Communication (NFC) sensors.
Power on Flex NX and then the accessory antenna. Wait for the accessory antenna’s indicator light to flash blue, and then bring the NFC labels together to automatically pair. In future sessions, simply power on the accessory antenna; NFC pairing will not be required.

NX Accessory Pairing

After powering on, Flex NX will start every new session at the Main Dashboard. From here, you can tap the icon to access system settings. Tap the icon to quickly start a scan.

Flex NX Dashboard

The Settings Menu is the control panel for customizing your Flex NX experience. We recommend enabling the lasers to get started. WiFi is enabled by default. When features are active you’ll see them represented as colored icons on the Flex NX graphic. Tap the X to return to the Main Dashboard.

Flex NX Settings

When starting a new scan you’ll be prompted to select the appropriate Concrete Type based the state of concrete cure. This menu only appears once during each session. Note: This setting will greatly impact depth readings. While collecting or viewing data, use the Depth Settings Menu to further refine the depth scale accuracy.

Select Concrete Type

A blank data collection screen will appear. Tap the icon to initiate a scan, and then move Flex NX forward to begin collecting data. Data will populate from left to right. Move Flex NX in reverse to view backup cursors that align with the red and green side lasers.
View the Top Navigation Bar
Access and adjust the Gain, Display and Depth settings.
Stop data collection

Data Collection Screen

Collecting GPR Data

The GPR data will reveal two distinct categories of reflections: targets, and layers. Targets, such as rebar and conduit, are discrete objects below the surface and are represented by hyperbolas (orange boxes). Layers are continuous features, like the slab/grade contact (blue box).
Closely-spaced targets, like wire mesh, produce abundant hyperbolas that overlap on the sides.
Rebar and other metallic targets produce bright hyperbolas. Rebar targets are often spaced wider than wire mesh targets.
Layers do not produce hyperbolas. They appear as continuous features that often vary in brightness and depth.

While collecting data you can tap the icon on the depth scale. This will open a window with three nested menus: Gain, Display, and Depth. For now, click the Gain icon in the lower left. Here you can use the slider to adjust the overall contrast of the data, or select one of three general depth levels (shallow, medium, deep) to selectively adjust contrast.

Improving Data Visualization

Tap the icon at the bottom of the panel to adjust Display settings. Here you can quickly change your data display from split screen with both antennas to full screen options for the standard (front) and cross polarized (rear) antennas. You can also adjust color tables, toggle the O-Scope, or enable Focus Mode.

Adjusting Display Options

Warranty Information

Limited Warranty, Limitations of Liability and Restrictions
Geophysical Survey Systems, Inc. hereinafter referred to as GSSI, warrants that for a period of 24 months from the delivery date to the original purchaser this product will be free from defects in materials and workmanship. EXCEPT FOR THE FOREGOING LIMITED WARRANTY, GSSI DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. GSSI’s obligation is limited to repairing or replacing parts or equipment which are returned to GSSI, transportation and insurance prepaid, without alteration or further damage, and which in GSSI’s judgment, were defective or became defective during normal use. GSSI ASSUMES NO LIABILITY FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR INJURIES CAUSED BY PROPER OR IMPROPER OPERATION OF ITS EQUIPMENT, WHETHER OR NOT DEFECTIVE. Before returning any equipment to GSSI, a Return Material Authorization (RMA) number must be obtained. Please call the GSSI Customer Service Manager who will assign an RMA number. Be sure to have the serial number of the unit available.
Regulatory Information: https://www.geophysical.com/regulatoryinformation
Copyright © 2023 Geophysical Survey Systems, Inc.
All rights reserved including the right of reproduction in whole or in part in any form.
Published by Geophysical Survey Systems, Inc., 40 Simon Street Nashua, New Hampshire 03060-3075 USA. Printed in the United States. Flex NX, Nexus, and GSSI Fusion are registered trademarks of Geophysical Survey Systems, Inc.

Flex NX Support
Geophysical Survey Systems, Inc 40 Simon Street Nashua, NH 03060-3075 USA Patent www.geophysical.com/patents