Humboldt 5000 BLU Light Weight Deflectometer - Manual (Page 34)

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Put on hearing protectors before the first drop. Hearing protectors must be
worn when operating the Light Weight Deflectometer, since the noise level
may rise over 85 dB during the test. ATTENTION: Operating the device
without hearing protection can result in permanent hearing impairment.
Following the instruction on the display ‘10 kg 1. Preload’, continue with the
first pre-consolidation test as follows: Take hold of the blue safety grip at the
end of the guide rod; open the release mechanism by pushing the green start
lever towards the guide rod and holding it there. With your other hand pull up
the unlocked drop weight all the way until it stops. Fix it in place by releasing
the green start lever and thus latching the drop weight into the release mecha-
nism. The drop weight is now fastened securely in the release mechanism on
top of the device. Open the release mechanism by pushing the green start lever
towards the guide rod, and let the drop weight fall freely until it hits the spring
assembly. Catch the drop weight immediately after first contact and in the same
way as described above, latch it back into the release mechanism. In total, six
drops must be performed to complete the test.
After hearing the audio signal and receiving the instruction ‘10 kg 2. Preload’,
continue with the second pre-consolidation test in the same way as described
above. The testing computer will not register any drops performed before the
audio signal.
After hearing the audio signal and receiving the instruction ‘10 kg 3. Preload’,
continue with the third pre-consolidation test in the same way as described
above.
The device checks the results of the three pre-consolidation tests and then
progresses automatically to the main test.
After hearing the audio signal and receiving the instruction ‘10 kg 1. Test’,
continue with the first test in the same way as described above.
After performing the first test, the device will show the settlement s4 in mm,
as well as the respective settlement curve.
After hearing the audio signal and receiving the instruction ‘2. Test’, continue
with the second test in the same way as described above
After performing the second test, the device will show the settlements of both
prior tests, s4 and s5, in mm, as well as the respective settlement curves.
After hearing the audio signal and receiving the instruction ‘3. Test’, continue
with the third test in the same way as described above.
After performing the third test, the device will show the settlements s4, s5 and
s6 in mm, as well as the respective settlement curves. Additionally, the final
result (the Evd value in MN/m
2 will be shown.
10 Kg
1. Preload
10 Kg
2. Preload
10 Kg
3. Preload
10 Kg
1. Test
s4=0,366mm
s5=0,364mm
s6=0,364mm
61,8 MN/m 2
s/v=2,277 ms
2/127 NEXT
s4=0,366mm
s5=0,364mm
3. Test
s4=0,366mm
2. Test
Regularly check that the transportation lock of the drop weight is functioning
properly. If you notice signs of wear, stop using the device immediately. Send
the device back to TERRATEST for the transportation lock to be repaired or
replaced.