NX25 Concrete Scanning System
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Product Specifications
- Model: Nexus Elements NX25 Antenna
- Antenna Type: NX15 Antenna
- Interface Options: Nexus Elements, Nexus
- Power Source: Lithium-Ion Battery
- Warranty: Two-year warranty
- Accessories Included: RAM Attachment, Lithium-Ion Battery,
Rugged Backpack, 2-Bay Charger, Wrist Strap, Quick Start Guide
Product Usage Instructions
Attaching Accessories
1. Ensure the accessories are oriented correctly with the
locking pin on the left side.
2. Slide the locking pin inward and insert the right side, then
insert the locking pin side and release it. To remove, reverse the
process.
3. To attach the Telescoping Pole Accessory, loosen the knob,
slide the jaws over the RAM adapter ball, and tighten the knob.
Powering On/Off
1. Slide the battery latch lock toward the front of the
antenna.
2. Insert the battery with contacts facing downward and toward
NX25/NX15.
3. Press both antenna buttons to Power On and hold them to Power
Off.
4. For one-handed battery ejection, press on the battery with
your thumb and slide the latch lock forward using your index
finger.
Interface Options
NX25 and NX15 offer two interface options: Nexus Elements for
simple scanning via smartphone or tablet, Nexus for a more
full-featured experience when connected to Flex NX or Flex LT.
Switching Modes
To switch between Nexus and Nexus Elements: – For Nexus
Elements: Wait for a flashing yellow LED to pair with a mobile
device. – For Nexus: Wait for a flashing blue LED to pair with a
Flex system.
Frequently Asked Questions (FAQ)
Q: How do I know if the antenna is ready to pair with a mobile
device?
A: The antenna will display a flashing yellow LED when waiting
to pair with a mobile device in Nexus Elements mode.
Q: What should I do if my battery drains when the antenna is
powered off?
A: GSSI recommends removing the battery when NX25 and NX15 are
not in use to prevent draining.
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ELEMENTS
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Nexus Elements Support
User Guides Training Videos Software Updates
NX15 Antenna
NX25 Antenna QuicQk Suick Start Guide MN73-380 Rev A
Have Questions?
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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.
NX25 Small Area System
NX15 Deep Target System
Nexus Elements Systems
NX25 Antenna
NX15 Antenna
Accessories included with Small Area and Deep Target Systems
RAM Attachment
NX25/NX15 Lithium-Ion Battery
Nexus Elements Rugged Backpack
2-Bay Charger
Wrist Strap
Quick Start Guide
NX25 and NX15 Physical Features
User programmable buttons;
Power on/off
Forward Direction
Status LED
Battery Lock
Battery Latch
Battery Compartment
Left accessory port
Antenna center (marked on all sides of antenna)
NOTE: Hardware features are identical for NX25 and NX15
Rear accessory port
Attaching Accessories
The NX25/NX15 RAM Adapter and Survey Wheel attachment locations (left, rear) are interchangeable.
NOTE: accessories can only attach in orientations shown, with the locking pin on the left side.
Slide the locking pin inward and insert the right side, with the locking pin to the left. Next, insert the locking pin side and release the locking pin. To remove, reverse the process.
To attach the Telescoping Pole Accessory (sold separately) to NX25 and NX15, loosen the knob, then slide the jaws over the RAM adapter ball and tighten the knob.
Encoder Configurations
Encoder configurations used for Normal Polarization · Left: Encoder Flipped · Back: Encoder Straight Normal Polarization is best for typical scanning scenarios and target locating. Orange Arrows show direction of antenna travel for each encoder position.
Encoder configurations used for Cross-Polarization · Left: Encoder Straight · Back: Encoder Flipped Cross-polarization provides a different view of scan data and is best for identifying important targets below reinforcement.
Powering NX25 and NX15 Antennas
Slide battery latch lock toward the front of the antenna. Use battery to push up on the battery latch and insert the battery.
Note: Battery can only be inserted with battery contacts toward NX25/ NX15 and facing downward.
Press both antenna buttons to Power On.
Press and hold both antenna buttons to Power Off.
One-handed battery ejection: Use thumb to press on battery and index finger to slide the battery latch lock toward the front of the antenna.
IMPORTANT: Electronic devices may drain a battery when powered off. GSSI recommends removing the battery when NX25 and NX15 are not in use.
Interface Options for NX25 and NX15
NX25 and NX15 feature two distinct user interfaces: Nexus Elements, for simple mark-and-go scanning using a smartphone or tablet; and Nexus, a more full-featured experience available when connected to Flex NX or Flex LT. NOTE: NX25 and NX15 will power on in the last used Mode.
NX25 and NX15 LED Status
Nexus Elements: NX25 and NX15 will display a flashing yellow LED when waiting to pair with a mobile device.
Nexus: NX25 and NX15 will display a flashing blue LED when waiting to pair with a Flex system.
Switch from Nexus to Nexus Elements by allowing the antenna to power on, then wait 1 minute for the antenna to change modes. Switch from Nexus Elements to Nexus by NFC pairing with Flex NX, or by using the Tether Module to connect to Flex NX or Flex LT.
Connecting to Nexus Elements
Nexus Elements supports these operating systems and browsers:
We recommend updating Safari and Chrome to the latest version available for your device. Mobile device models with outdated browser versions may experience performance and compatibility issues.
To connect to the Nexus Elements interface:
1. Power on NX25 or NX15 and wait for the flashing yellow LED. If the LED flashes blue, wait 1 minute for the antenna to switch to Nexus Elements and display a flashing yellow LED.
2. Open Wi-Fi settings on your phone or tablet. Tap on the wireless network name that matches your antenna’s model number and serial number (e.g. NX25_00123; NX15_00456).
· If prompted to enter a password, type in geophysical
· Android users may see a “network has no internet access” popup. Tap “Yes” and “Don’t ask again for this network”.
3. Open the browser recommended for your operating system, then type nx.local into the address bar and tap enter.
If your browser is minimized or not used for a while, or your mobile device turns off its screen, simply go back to the browser and tap the refresh button.
Nexus Elements Main Dashboard
Nexus Elements will start at the Main Dashboard. From here, you can:
·
View the system type, system serial number, and software version
·
Assign actions to the antenna’s two integrated buttons
·
Select measurement units and language preference
·
Download system logs and perform a software update
·
Tap the battery icon to display current battery charge
·
Start a new scan
To begin, tap the Start New Scan icon
Select the appropriate Concrete Type based the state of concrete cure. This menu only appears once during each session.
Last Used will apply the dielectric value from previous sessions.
An incorrect dielectric will greatly impact depth readings. While viewing scan data, use the Matching tool from the Depth Settings menu to further refine the depth scale accuracy.
Select Concrete Type
A blank data viewing screen will appear, with Start Scan already enabled. Before you move the antenna, take a moment to familiarize yourself with the viewing screen’s features and controls.
Data viewing Screen: Controls
Gestural Controls
Hide/show on Move and place Zoom in/out
screen controls
cursors
Hide the browser bar
Rotate mobile device to landscape orientation for data viewing. Toggling rotation lock is recommended
Start/Stop Scan
Gain, Display, and Depth Menus
Return to Main Dashboard
Fast Forward
When using the backup cursor, tap this to jump to the end of the scan.
Data Viewing Screen: Scanning
Move the antenna forward to view live data populating from left to right. The viewing window displays a distance scale above the scan and a depth scale on the left side. The scales display the units selected on the Main Dashboard.
Move the antenna in reverse to view a backup cursor and a dialog box displaying distance and horizontal cursor depth. The cursor is aligned with the center marks on the antenna. Use the backup cursor and center marks to accurately mark target locations on the scanning surface.
Tap on the depth scale to 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 scan data, or select one of three general depth regions (shallow, medium, deep) to selectively adjust contrast for each area. Tap to close the menu window.
Improving Data Visualization
Gain
Depth
Display
Tap at the bottom of the panel to adjust Display settings. Here you can quickly change the color table, toggle the O-Scope, or adjust Width Scaling to expand or compress the scan data.
Adjusting Display Options: 1
Gain
Depth
Display
Toggle the O-Scope to view additional target details at the backup cursor’s location, such as phase and amplitude information. Use one finger to move the horizontal cursor to a location of interest. With practice, you can use the O-Scope to make advanced interpretations.
Adjusting Display Options: 2
Gain
Depth
Display
Use Width Scaling to compress or expand the horizontal scale. Setting 1 compresses targets fully and Setting 4 expands targets fully.
Now click the Depth icon in the lower right corner of the menu. Here you can fine tune your dielectric value to improve depth scale accuracy. Tap the down-facing arrow and select Matching. Use one finger to move the crosshairs over the center of a target, then use the slider to fit the curve to the target’s shape. Moving the slider also updates the depth scale.
Improving Depth Accuracy
Gain
Depth
Display
Updating NX25 and NX15
Follow these steps to update your antenna using a mobile device and the Nexus
Elements Interface*:
1.
Please Download the latest NX25/NX15 update.
1.
www.geophysical.com/ support/flexnxsupport
2. Connect to your NX25 or NX15 and tap Update
Software on the Main Dashboard.
2.
3. Next, Tap “Choose a file” and browse your device storage for the update file (.zip format). The system will display a warning if an incorrect file was selected. Tap Next to transfer the update 3. files to the antenna. A progress indicator will be displayed. This may take a minute or two; please be patient. The system will display an error if an earlier software update was selected; please select a version higher than your current version.
4. The antenna LED will flash magenta while
updating. Do not power off the antenna. The
4.
antenna LED will flash yellow once the update is
complete.
5. You can now reconnect to your antenna. Close
the current browser tab, then connect as normal.
5.
NOTE: you may have to reconnect to the
antenna’s Wi-Fi network.
* To update using the Nexus Interface, refer to the User Guide for Flex Systems
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 © 2023-2025 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.
Nexus Elements Support User Guides
Training Videos Software Updates
Geophysical Survey Systems, Inc. 40 Simon Street Nashua, NH 03060-3075 USA Patent www.geophysical.com/patents
Documents / Resources
 | GSSI NX25 Concrete Scanning System [pdf] Installation Guide NX25, NX15, NX25 Concrete Scanning System, NX25, Concrete Scanning System, Scanning System, System |