Humboldt 5000 BLU Light Weight Deflectometer - Manual (Page 7)

7
1.2 General Safety Information
Please read and understand the following safety guidelines, before starting to use ‘TERRATEST 4000 USB’
/ ‘TERRATEST 5000 BLU’.
Useful information and instructions
ATTENTION
Indicates processes where incorrect execution could result in physical injury or material damage.
Please observe these warnings carefully to ensure a safe operation of the device.
ATTENTION
If the Light Weight Deflectometer is used in a manner not specified by these instructions, the protection
provided by this instrument may be impaired.
ATTENTION (Quotation from ZTV E-StB 09)
‘The deformation modulus Ev2 is to be assessed by the static plate load test, in accordance with
DIN 18134, and the dynamic deflection module Evd with the dynamic plate load test, in accordance
with TP BF-StB Part B 8.3.... The specifications of the building contract should state whether the static or
dynamic deflection modulus is to be established. If no such statement is to be found in the contract, the
static deformation modulus will need to be established.’
ATTENTION
The evaluation of the measured Evd value depends on the material and the subsoil being tested. It is
always necessary to determine correlation values of the static plate load test on a trial basis for the
pre-existing ground or the ground intended for backfilling. Homogeneous ground is a prerequisite for
properly correlating the two measuring methods. Accordingly, the water content of the soil must not vary
widely.
ATTENTION
According to German standard TP BF-StB Part B 8.3, Light Weight Deflectometers must be calibrated at
least once a year at a calibration institute accredited by the German Federal Road Research Institute
(Bundesanstalt für Straßenbau). Test results of a device that has not been calibrated or of a device with
an expired calibration date must not be used for evaluating the bearing capacity of soil or rock. Abide
by the mandatory calibration intervals.
CAUTION
Never place the testing computer or load plate of ‘TERRATEST 5000 BLU’ near any inflammable liquids
such as alcohol, thinner etc. There is a risk of fire if such flammable liquids make contact with the electric
components in the interior of the device.
CAUTION
Never place or charge the testing computer or load plate of ‘TERRATEST 5000 BLU’ in areas with excessive
humidity, high temperatures, direct sunlight, or close to open flames. Doing so carries the risk of fire or
electric shock.
CAUTION
Whenever the loading device is not placed on the metal ball of the sensor dome on the load plate, always
store it horizontally or on the magnetic plate, which may be purchased separately. The loading device could
fall over and cause injuries otherwise.
CAUTION
Before operating the Light Weight Deflectometer read the instruction manual carefully to ensure correct
set-up of the device. When no test is performed, keep the drop weight in its ‘rest’ position at the bottom
of the guide rod. The drop weight could fall down and cause injuries or damage otherwise.