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Move the handle back to the SAFE position and note that the display did
not change. It is not necessary to leave the source in the measurement
position (exposed) while calculations are made. So long as measurement
data is present in the active registers the handle position in which the data
was taken remains in the display. Clear the data by
MAIN MENU
and the
display will again correctly indicate SAFE. To view the results of the current
measurement again from main menu press
F1
(*DATA)
F1
(*CURRENT
MEASUREMENT).
3.7.2.2 Asphalt Thin Layer Measurements
There are no currently available true thin-lift gauges of the surface type.
They all make one or two measurements at depths greater than the desired
thickness and calculate the apparent density of the top layer using the
varying depth response of the gauge in the backscatter mode. The major
problem with them is that the resultant precision is so poor that the validity
of the results is questionable.
This gauge uses the nomograph principal where the density of the
underlying material is known from prior measurement. The top layer density
is then calculated. The density of the underlying material must be entered in
the LWD register.
To enter LWD press
MAIN MENU, F2
(*SETUP),
F4
(*SET TARGETS),
F1
The LWD value is flashing, Press
F3
to
INCREASE
or
F4
to
DECREASE
the
value.
Set the mode to THIN as described above in 3.7.2. The thickness of the top
layer of material must be set. Using the
F4
key sets it. The increments are
5mm (0.2 inches) and the maximum range is from 25mm (1.0 inch) to 160mm
(6.4 inches). The latter value includes 100% of the maximum response of the
gauge to density in the backscatter mode.
After setting the thickness, press
MEAS
and the measurement will proceed
as with a normal backscatter measurement. The computed density of the
top layer will appear in the DATA display. This data can be stored the same
as any other measurement.
DC = XXXX.X
DS = XXXX.X
MC = XXX.X
MS = XXX.X
VR = XX.X
%AV = XX.X
* LAST
MDEPTH = BAC
MAXD = XXX.X LWD = XXX.X
KVAL = X.XXX SPG = X.XXX
* INCREASE
* DECREASE
Содержание HS-5001EZ
Страница 1: ...product manual HS 5001EZ_MAN_08 12 HS 5001EZ Moisture Density Gauge ...
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