Dynatest 3032 LWD User manual

2021.10.04 1110300 LWD 3032 User Manual 1.0.6 Page i
DYNATEST 3032 LWD
Light Weight Deflectometer
OWNER’S MANUAL
Version 1.0.6
ID Number 1110300

Page ii 2021.10.04 1110300 LWD 3032 User Manual 1.0.6
This document is subject to change without notice. No part of this document may be reproduced
in any form without written permission of Dynatest.
© 2020 Dynatest A/S. All rights reserved
Arial and Times New Roman are registered trademarks of The Monotype Corporation PLC.
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Any other trademark is a registered trademark of the respective company.

2021.10.04 1110300 LWD 3032 User Manual 1.0.6 Page iii
Table of Contents
1Instructions for use.........................................................................................................5
1.1 Unpacking ..........................................................................................................5
1.2 Standard equipment.........................................................................................5
1.3 Optional equipment..........................................................................................5
1.4 Overview ............................................................................................................6
2Introduction to the 3032 LWD (Light Weight Deflectometer).....................................7
2.1 Description..........................................................................................................7
2.1.1 Introduction.............................................................................................7
2.1.2 Key Operational Features......................................................................7
2.1.3 Key Field Software Features...................................................................8
2.1.4 Key LWDmod Analysis Software Features.............................................9
2.2 Application.......................................................................................................10
3Technical specifications .............................................................................................11
3.1 Technical data.................................................................................................11
3.2 Transportation ..................................................................................................11
3.3 Android minimum requirements .....................................................................12
3.4 iOS minimum requirements .............................................................................12
3.5 Registration.......................................................................................................12
4Preparing the LWD for use...........................................................................................13
4.1 Additional drop weight(s) ...............................................................................15
4.1.1 Setting up the 15 kg Drop Weight .......................................................15
4.1.2 Setting up the 20 kg Drop Weight .......................................................15
4.2 The weight catch assembly ............................................................................16
4.2.1 Adjustment............................................................................................16
4.2.2 Use .........................................................................................................17
4.3 The Dual Plate System .....................................................................................18
4.4 To Centre and Seat the Geophone...............................................................19
4.5 Additional Geophones....................................................................................20
5Software & Paring setup..............................................................................................22
5.1 Connecting and pairing Bluetooth devices..................................................22
5.1.1 Turn Bluetooth on or off........................................................................23
5.1.2 Pair & connect your device ................................................................24
6Using the Data Collection Software ...........................................................................26
6.1 Home screen....................................................................................................27
6.2 Project page and sessions ..............................................................................28
6.3 Location and data collection pages.............................................................30
6.4 Settings pages..................................................................................................34
7LWD Operation ............................................................................................................37
7.1 Using the 300mm or Dual Plate System ..........................................................37
7.2 Changing to the 100mm or the (optional) 200mm dia. plate .....................38

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8Maintenance ...............................................................................................................39
8.1 Battery charge .................................................................................................39
8.2 Calibration........................................................................................................39
9Service and support....................................................................................................40
9.1 Support & Assistance .......................................................................................40
10 EU declarations and certificates ................................................................................41
11 FAQ...............................................................................................................................42
11.1 General Questions ...........................................................................................42
11.2 Questions related to the use...........................................................................43
11.3 Questions related to measuring .....................................................................43

2021.10.04 1110300 LWD 3032 User Manual 1.0.6 Page 5
1Instructions for use
This manual helps the user to get the most from the Light Weight Deflectometer. Before
operating the machine, carefully read the following information.
REMARK!
Encircled capital letters refer to an item illustrated.
1.1 Unpacking
When the machine is delivered, carefully inspect the shipping carton and the machine
for damage. If damage is evident, save the shipping carton so that it can be inspected
by the carrier that delivered it. Contact the carrier immediately to file a freight
damage claim. Make sure all parts are included and in good condition.
1.2 Standard equipment
•Main Unit with integral load cell, centre deflection sensor, electronics unit,
wireless module with battery compartment and including a 150 mm dia.
loading plate, convertible to a 100mm dia. Plate.
•300mm (11.8 in) diameter plate (for the 150/300 mm Dual Plate System).
•300mm (11.8 in) diameter Ribbed Rubber Pad.
•Drop Weight Guide Shaft, top and bottom parts.
•Weight Catch Assembly.
•2 Buffer Pad Stacks (1 stack of 4 (or5) black pads plus 1 stack of 2 grey pads).
•10 kg (22 lb.) Basic Drop Weight.
•Sensor Locking Plug.
•USB charger cable.
•Transportation Box for standard equipment.
•1 year of free support by phone or e-mail.
1.3 Optional equipment
•Transportation Trolley.
•5 kg (11 lb) (2 max) additional drop weight(s).
•2 Buffer Pad Stacks (1 stack of 5 grey pads plus 1 stack of 2 black pads).
•Loading Plate Ø200 mm (7.9 in).
•Additional Deflection Sensor(s) (one or two).
•Sensor Extension Bar for up to two deflection sensors.
•Transportation Box for optional equipment.
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1.4 Overview
Figure 1 The Dynatest LWD
Weight catch assembly
Safety latch
Drop weight
(only 10kg weight shown)
Buffer stack
Electronics unit
150 mm loading plate
Snap lock
300 mm loading plate

2021.10.04 1110300 LWD 3032 User Manual 1.0.6 Page 7
2Introduction to the 3032 LWD
(Light Weight Deflectometer)
2.1 Description
2.1.1 Introduction
Back in the early 1970’s, as mechanistic (or analytical) approaches to pavement
engineering found increased support internationally, Dynatest introduced the world’s
first portable LWD (Light Weight Deflectometer), as a new method to determine the E-
modulus of un-bound materials in pavements.
Over the recent years demand for an automated device has arisen and this prompted
Dynatest to re-design its 1970 device, enhancing and automating the LWD mechanics
by means of the latest technology, adding electronics and analysis software that go
far beyond what is currently offered in the marketplace. The new device has been
designed to meet international standards that are under development for this type of
equipment.
The Dynatest LWD meets all current standards the ASTM E 2583, the UK IAN73 and the
standards in Denmark and Italy.
The equipment is precision-engineered, using stainless or anodized material for all
metal parts. The system is powered by a pack of four AA alkaline or rechargeable
batteries, providing approximately 2000 measurements or the equivalent to more than
12 hours of continuous operation.
With the additional (optional) 2 x 5kg weights added, the Dynatest LWD can produce
up to 15kN peak loads. The LWD weighs about 22 kg (with the standard 10kg drop weight),
and it is highly portable and easily carried around a construction site. There is an optional,
specially designed trolley available.
The Dynatest LWD requires no reference measurements and provides a simple, cost
effective alternative to time-consuming and expensive static plate bearing testing.
The LWD is ideal for Quality Assurance / Quality Control on subgrade, subbase and thin
flexible constructions, on newly built or existing constructions to ensure that
specifications are met. It can similarly be used to identify weaknesses, leading to
further tests by FWDs and other material analysis techniques.
2.1.2 Key Operational Features
•The Dynatest LWD electronics are interfaced to a smartphone via a wireless
Bluetooth connection.
•The LWD electronics are dust and splash proof (IP56) for safe outdoor use.
•The drop height is easily and quickly adjusted by a movable catch assembly.
•A laser engraved scale on the weight guide shaft allows for easy setting of
the desired drop height.
•The magnitude of the impact force is determined from actual measurements
by a precision load cell, measuring the time history and peak value of the

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impact force from the std. 10kg or the optional 15kg or 20kg drop weight
setups.
•The loading plate diameter can quickly and easily be switched between
300mm and 150mm. A 100mm plate diameter is also available as standard,
and an optional 200mm plate is available.
•The centre deflection time history and peak value are measured through a
hole in the loading plate by a highly accurate, seismic transducer
(geophone).
•Built-in ability to ensure that the centre geophone is centred and seated
correctly.
•Optionally, two more geophones can be added.
2.1.3 Key Field Software Features
•The data collection software residing on the smartphone displays - in real
time - the surface modulus and the time history graphs from the geophone
as well as from the load cell.
•Relevant information such as name, place and comments can be added to
the data file for each measuring point.
•Poisson’s Ratio as well as Stress Distribution Factor parameters may be
defined by the operator.
•With the use of a smartphone, data can be collected and e-mailed or sent
directly to a server.

2021.10.04 1110300 LWD 3032 User Manual 1.0.6 Page 9
2.1.4 Key LWDmod Analysis Software Features
The optional software package LWDmod offers advanced features for data
organization, analysis and reporting:
•Imports data into a project database, allowing organization of multiple files
into one database.
•Graphical features to view test results, and to eliminate selected drops or points
from the file.
•Editing features.
•Automated selection of drops to be used in the analysis.
•Calculation of surface moduli, as shown in Fig. 2.
Figure 2 LWDmod surface modulus screen
•Back-calculation of layer moduli for multi-layer systems, using the results of
multiple tests.
•Calculation of subgrade non-linearity.

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Figure 3 - LWDmod deflection and elastic modulus displays
•Calculation of needed overlay thickness based on design surface moduli.
•Analysis of load/deflection time histories (see Figure 3).
•Graphical presentation of all analysis results.
•Possibility to export result tables and graphics.
2.2 Application
The Light Weight Deflectometer is a handy instrument for on-site measurement of
bearing capacity and stiffness of subgrade, subbase and thin flexible constructions.
Only one person is needed for the operation and the equipment can work under very
difficult conditions and areas with poor accessibility like in excavation trenches. Site
locations can be captured by means of GPS (Geographic Positioning System), which
enable presentation of data in maps or general plans of site.

2021.10.04 1110300 LWD 3032 User Manual 1.0.6 Page 11
3Technical specifications
3.1 Technical data
General
Height
1,38 m (54.3 in), assembled
Total weight
Approx. 22 kg. (49 lb.) (Std. equipment w/o
Transportation Box)
Loading
Loading plate
diameters
100mm (3.9 in), 150mm (5.9 in) & 300 mm (11.8 in)
standard (optional 200 mm (7.9 in))
Drop Weight Mass
10 kg (22 lb) (optionally 15/20 kg (33/44 lb))
Drop Height
850 mm (33.5 in) max.
Loading range
>15 kN (3370 lbf) peak load using the optional 20 kg (44
lb) drop weight
Loading type
Essentially half sine
Pulse duration
15 - >30 ms
Load Cell
Range
0-25.0 kN (0-5,500 lbf)
Accuracy
2% ± 2 kPa (2.25 lbf)
Precision
0,0003 kN (0.067 lbf)
Deflection Sensor(s)
Type of sensor
Velocity transducer (Geophone)
Number
1 with the standard unit (optionally 1 or 2 additional
sensors)
Range
0-2200 μm (0-87 mil)
Sampling frequency
4,000 Hz on each sensor
Sampling period
60-120 ms (set by user)
Accuracy
2% ± 2 µm (0.08 mil)
Precision
0.1 µm
3.2 Transportation
Transportation box for standard equipment
Material
High impact ABS
Carrying capacity
80 kg (176 lb)
Net weight
11 kg (24 lb)
External dimensions
750 x 500 x 250 mm (29.5 x 19.7 x 9.8 in)
Transportation box for additional equipment (optional)
Material
High impact ABS
Carrying capacity
50 kg (110 lb)
Net weight
3,3 kg (7.3 lb)
External dimensions
470 x 370 x 150 mm (18.5 x 14.6 x 5.9 in)
Transportation trolley (optional)
Material
Stainless Steel and POM
Net weight
2.9 kg (6.4 lb)
Wheels
Pneumatic

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3.3 Android minimum requirements
• Bluetooth LE capability
• GPS Capability
• Internet Capability
• Android 5.1 or newer
• Windows Mobile 2002, Windows Mobile Version 5.0 or newer Operating System
3.4 iOS minimum requirements
• Bluetooth LE capability
• GPS Capability
• Internet Capability
• iOS 10.2 or newer
3.5 Registration
The machine Model and Serial Numbers are shown on the main unit or can be found
in the “about” box in the LWD software (e.g. 3032-3115). This information is needed
when ordering spare parts for the machine. Use the space below to note the machine
Model and Part Numbers for future reference.
Model Number……………………………
Serial Number…………………………………

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4Preparing the LWD for use
Figure 4 - Standard LWD

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1. Place the 300mm dia. ribbed rubber pad on a flat surface.
2. Place the 300mm loading plate on the ribbed rubber pad.
3. Rotate the 3 snap locks to click-lock in an “open” position.
4. Check that the centre deflection measuring rod (at the bottom of the Main Unit)
is TIGHT (In case of testing on a very soft material, it may be necessary to unscrew
the centre deflection measuring rod and replace it with the supplied Sensor
Locking Plug, which will then plug the centre hole of the 150mm plate and also
lock the centre geophone to the plate).
5. Place the Main Unit in the centre of the 300mm plate, so that the small, vertical
indicator pin of the 300mm plate will fit into the mating groove in the edge of the
150mm plate (= the bottom of the Main Unit).
6. Rotate the Main Unit anticlockwise until the indicator pin is at the end of the
groove at the “300mm” engraved mark (under the electronics module).
7. Lock each of the 3 snap locks: First rotate the knurled knob till the hole just behind
the knob is vertical and the clamping piece (opposite to the knob) is in its top
position, then rotate the snap lock 90 degrees clockwise and turn the knob firmly
(the 4mm Allen key may be stuck in the hole behind the knob for further
tightening, but please do not over tighten!).
8. Add on the appropriate Buffer Pad Stack:
NOTE:
NEVER use a low, 2-pad stack ALONE!!
The additional three smaller pads must always be
on top of the buffer pad stack!
a. For the basic 10 kg weight, first apply the
low stack of “2” Grey pads, then the stack
of “4”(or 5) black pads (with the
additional three smaller pads on top).
If either the optional 15kg or 20kg drop weight is
used (see “Additional Drop Weight(s)” below), add
on buffer stacks as follows:
b. For the 15 kg weight (1 x 10 kg plus 1 x 5 kg
weights), first apply the low stack of “2”
black pads, then the stack of “5”Grey
pads (with the additional three smaller
pads on top).
c. For the 20 kg weight (1 x 10 kg plus 2 x 5 kg
weights), first apply the low stack of “2”
grey pads, then the stack of “5”grey pads
(with the additional three smaller pads on
top).
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2021.10.04 1110300 LWD 3032 User Manual 1.0.6 Page 15
9. Screw the lower part of the Weight Guide Shaft (the one with engraved drop
height Nos 1 to 11, No. 11 upwards) into the top stem of the LWD Main Unit.
10. Slide the Drop Weight over the lower Weight Guide Shaft onto the combined
Buffer Pad Stack.
11. Un-tighten the Locking Collar of the Catch Assembly and insert the upper part of
the Weight Guide Shaft through the centre of the Catch Assembly.
12. Re-tighten the Locking Collar.
13. Connect the upper and lower parts of the Weight Guide Shaft together.
4.1 Additional drop weight(s)
4.1.1 Setting up the 15 kg Drop Weight
1. Move the Catch Assembly to the top part of the Weight Guide Shaft.
2. Unscrew the top part of the Weight Guide Shaft from the lower part.
3. Remove the 10 kg Basic Drop Weight.
4. Replace the combined Buffer Pad Stack with the appropriate, combined
stack explained above for the 15 kg weight.
5. Re-apply the 10 kg weight.
6. Place the additional 5 kg (11 lb) drop weight with six magnets on top of
the 10kg weight and secure in place using the Allen key and bolts.
7. Re-apply the top part of the Weight Guide Shaft.
4.1.2 Setting up the 20 kg Drop Weight
1. Move the Catch Assembly to the top part of the Weight Guide Shaft.
2. Unscrew the top part of the Weight Guide Shaft from the lower part.
3. Remove the current Drop Weight (10 or 15 kg).
4. Replace the combined Buffer Pad Stack with the appropriate, combined
stack explained above for the 20 kg weight.
5. Re-apply the current drop weight.
6. If the current drop weight is 15 kg, skip the following step.
7. Place the additional 5 kg (11 lb) drop weight with six magnets on top of
the 10kg weight and secure in place using the Allen key and bolts.
8. Place the additional 5 kg (11 lb) drop weight with eight magnets on top of
the 15kg weight and secure in place using the Allen key and bolts.
9. Re-apply the top part of the Weight Guide Shaft

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4.2 The weight catch assembly
The weight catch assembly is used to drop the weights and steady the guide shaft
during a measurement (see Figure 5). It can be moved up and down the shaft to give
different drop heights and be setup to suit left and right-handed operators.
Figure 5 - Weight catch assembly
4.2.1 Adjustment
To change the drop height, flip the quick release collar handle open. The weight
catch assembly can now be moved up and down. Then close the quick release collar
handle once in the correct position. Note that the clamping pressure of the quick
release collar can be adjusted by tightening or loosening the nut opposite the quick
release collar handle.
To change the weight catch assembly for left handed use, unscrew the clamping
pressure adjustment screw entirely. The quick release collar handle can then be
removed along with its bushing and switched to the other side. Be sure to swap
everything from side to side then fit and adjust the clamping pressure adjustment
screw.

2021.10.04 1110300 LWD 3032 User Manual 1.0.6 Page 17
4.2.2 Use
Lift the weight until the magnets of the drop weight “click” and locks to the bottom of
the weight catch assembly.
•Grip the weight catch assembly so that the index finger is over the weight
release trigger and the little finger is over the safety latch.
To release the weight:
•Hold in the safety latch and then press the weight release trigger.
•Keep holding the weight catch assembly firmly until the drop weight stops
bouncing.
Figure 6 - Releasing the drop weight

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4.3 The Dual Plate System
The Dynatest LWD comes standard with a dual 150 mm and 300 mm diameter plate,
which can be switched between WITHOUT removing the LWD from a test point. Please
place a 300 mm dia. ribbed rubber pad under the dual plate.
IF both plate sizes are used in a test point, then ALWAYS FIRST test with the 300 mm
plate, THEN with the 150 mm plate.
•By turning anticlockwise, the 3
Snap Lock mechanisms, the
locks can be released and
turned 90 degrees to either side.
•With released Snap Locks, the
LWD Main Unit can be rotated
using the LWD Rotation Handles
•By rotating the Main Unit, the
indicator pin in the groove in the
edge of the 150 mm plate will
move from the 150 mm to the
300 mm marking or vice versa,
indicating which plate diameter
is in use
•When selecting the 300 mm
plate, the 3 Snap Locks MUST be
locked securely by turning the
snap lock clockwise. The snaps
locks should clamp firmly, but do
not over-tighten them.
•When selecting the 150 mm
plate, the 3 Snap Locks MUST be
LEFT RELEASED (but preferably
NOT turned 90 degrees). It is
IMPORTANT that the indicator pin is at and stays at the very end of the groove, at
the 150 mm mark, for any drop made with this setting!

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4.4 To Centre and Seat the Geophone
Just before making the first drop in a test point, press down FULLY and then release the
centring lever to ensure that the centre geophone is seated correctly.
This can be repeated at any time between drops and should always be done if the
plate has shifted position after a drop.
Figure 7 - Centring the geophone
Centring lever

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4.5 Additional Geophones
If using additional geophones, these must be located correctly and plugged into the
correct sockets on the LWD electronics box.
Connect the additional geophones to the connectors on the right side of the
electronics box. It is very important that geophone number 2 is connected to D2 and
geophone number 3 to D3. Each plug should be pressed in until it locks with a click (to
later disconnect, pull the plug body, NOT the cable!!)
Use the nylon strap on the geophone extension bar to ensure its correct position. The
end of the strap should touch the outer surface of the LWD body.