Light Weight Deflectometer (LWD) Manufacturer

Description
Referring Standard
Features
Technical Specification

TBTLWD series Light Weight Deflectometer is a non-destructive(NDT) instruments, also called as dynamic deformation modulus tester (hand-held drop hammer deflection meter), it is used to determine the deflection capacity of the sub-grade under the dynamic load, thereby evaluating the bearing capacity and deformation of the sub-grade. It is applicable to the monitoring and inspection of foundation construction quality of railways, highways, airports, urban traffic, ports, terminals and industrial and civil buildings subjected to dynamic loads.

It is especially suitable for the detection of narrow sections of the site, such as the transition of roads and bridges (culverts) and the detection of shoulders, both line base and so on. It can quickly measure the dynamic deformation modulus EVD value.

ASTM E2835-11

1.Imported sensors and some components are used for high test accuracy;

2.Use smart terminal to control test, which realize the wireless data collecting(TBTLWD-1GW only);

3.Easy operating, fast testing which make one point test consumes 35s;

4.The EVD value is automatically calculated and the curve is displayed, which is accurate and intuitive;

5.Handheld main unit with Bluetooth micro-printer, direct printing on site to ensure accurate and objective test results;

6.USB transmission interface, easy to connect with the computer;

7.This instrument simulates the impact of the train on the subgrade when driving at high speed;

8.Compared with the static load test, it can reflect the actual stress of the subgrade soil.

Usage range	Soil type	Various types of soil and earth and rock mixed fillers with a particle size not larger than 1/4 of the diameter of the load plate
	Range	10Mpa≤Evd≤225Mpa
	Depth	0~500mm
	Working environment	Temperature: -10℃~40℃	Humidity: <90%RH
Data acquisition device	Adding load method	With 1pc geophone sensor Weight: 15kg, including hammer of 10kg drop weight drop value: 700±20mm Maximum impact: 7.07kN Impact duration: 18±1ms
	Loading plate	Weight: 15kg Diameter: 300mm Thickness: 20mm
Handheld main unit	Deflection range	0.10mm~2.00mm
	Capacity	2000 groups of data (TBTLWD-1G) Refer to cell phone config, normally with 10G storage(TBTLWD-1GW)
	Screen size	3inches (TBTLWD-1G) / 5 inch(TBTLWD-1GW)
	Power supply	Li-battery of more than 18hours(TBTLWD-1G) According to cell phone battery(TBTLWD-1GW)
	Display	Screen display (English)--TBTLWD-1G Cell phone app (English)--TBTLWD-1GW
	Data transfer	Cable transfer (TBTLWD-1G) Wifi transfer data (TBTLWD-1GW)
Printer	Connection	Bluetooth
Package	Carrying case	Inside case material: engineering plastic measurement: around 420 × 140 × 335mm Weight: around 4.5KG
		Outside case material: aluminum alloy case Measurement: around 1230 × 400 × 400mm Weight: around 56KG

Light Weight Deflectometer (LWD) TBTLWD-1G/1GW

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