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3.7.2 Measurement Type Selection
Before a measurement is made, material under test must be selected i.e.
ASPHALT / SOIL / THIN LAYER. To select measurement type press “
MAIN
MENU
”,
F2
(*SETUP),
F2
(*SET MEASURE MODES),
Pressing
F3
will toggle the measurement type selection between Asphalt,
Soil, and Thin Layer mode.
3.7.2.1 Asphalt Measurements
Set the mode to Asphalt as described above. With the handle in the SAFE
position, press
MEAS
. ERROR MESSAGE “Invalid for current depth” appears
since no measurement can be made with the handle in this position. Press
MAIN MENU
to get rid of the error condition. Reset the handle to BAC,
both backscatter and direct transmission may be used for asphalt the latter
is seldom used due to the destructive nature of making
the direct transmission hole. Press the
MEAS
key.
After counting down from 1:00 the wet density and % Marshall will appear in
the display.
Since the moisture channel is actually measuring hydrogen the AC displayed
is an approximation of the asphalt content of the mix. 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. MDEPTH indicate measured depth.
MEAS =FAST/NORM/SLOW
STD =4MIN/16MIN
TYPE =ASPH/SOIL/THIN
DEPTH =AUTO/MANUAL
TAKING MEASUREMENT
TIME REMAINING
1:00
DC = XXXX.X
MC = XXX.X
DEPTH = BAC
MEASURE ASPH RESULTS
WD = XXXX.X %MA=XXX.X
AC = XXX.X
MAXD= XXX.X
* NEXT
