HMP LFGpro - The Light Weight Deflectometer; Construction of the Instrument

THE LIGHT WEIGHT DEFLECTOMETER
Service +49(0)391 2514666 02/2017 Instruction Manual HMP LFGpro – en
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Construction of the Instrument
The LWD consists of the following assemblies:
❙ Loading mechanism
❙ Load plate
❙ Electronic settlement measuring instrument
Loading Mechanism and Load Plate
Construction of loading mechanism and load plate is described below with
reference to Figure 1.
Loading mechanism
1 Handle 5 Drop-weight
2 Release mechanism 6 Transportation lock
3 Bubble level 7 Resilient element with prestressed
disc springs 4 Guide tube
Load plate
8 Cap with sensor
9 Sensor socket (to connect the measuring cable)
10 Load plate carrying handles
The sensor which serves to measure the settlement is arranged under the
cap (8) of the load plate. The leads of the sensor are led out on the sensor
socket (9) and are connected to the electronic settlement measuring instru-
ment via a measuring cable.
Electronic Settlement Measuring Instrument
The battery-operated settlement measuring instrument is housed in a hand-
held case.
Settlement measuring instrument
(Figure 2)
1 TFT colour display
2 Measuring cable
3 Ambient Light Photo Sensor
4 USB port
5 Printer port
6 Function keys
Carrying case
(Figure 3)
1 Carrying case
2 Settlement measuring instrument,
beneath: USB cable, charger for printer (optional)
3 USB car charger, USB stick
4 AC/DC adapter (beneath cover)
5 Thermal printer AP 1300 (optional)
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Figure
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Figure
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