34
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 by voice output ‘FIRST PRELOAD’, and display
instruction ‘LFG 1.0 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 mechanism. 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 are requi-
red to complete the test (three preloads and three test drops).
After hearing the audio signal and receiving the instruction ‘LFG 1.0
2. Preload’ on display and voice message ‘SECOND 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 ‘LFG 1.0
3. Preload’ on display and voice message ‘THIRD 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 ‘LFG 1.0 1. Test’
on display and voice message ‘FIRST 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’ on display
and voice message ‘SECOND 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’on display
and voice message ‘THIRD 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 of Evd value is displayed in MN/m
2
. Simultaneously it is also announ-
ced by voice output, rounded to integers in MN/m
2
.
LFG 1.0
1. Preload
LFG 1.0
2. Preload
LFG 1.0
3. Preload
LFG 1.0
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
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