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Set the mode to THIN as described above in 3.7.2. Press
MEAS
key
After counting down from 1:00 the wet density of top layer, % Marshall and
the approximate asphalt content will appear in the display.
The depth of measurement will be 100mm (4 inches) or even more
depending on the actual asphalt content. If you need the actual counts,
pressing
F4
(*NEXT) the DC (density counts), DS (density standard), MS
(moisture standard) and MC (moisture counts), will indicate the counts used
to determine the computed data. The VR and %AV will indicate void ratio
and percent air voids. THICKNESS indicate lift thickness.
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).
This gauge obtains its backscatter density measurement in a manner, which
is non-linear with respect to the strata within the sample. The table below
indicates the response at various depths:
TAKING MEASUREMENT
TIME REMAINING
1:00
DC = XXXX.X
MC = XXX.X
THICK = 1.0
THIN LAYER RESULTS
WD = XXXX.X %MA=XXX.X
AC = XXX.X LWD = XXX.X
* NEXT
THICKNESS =X.X
