Troxler RoadReader Plus 3450, Manual Of Operation And Instruction, Page: 99 / 201

6–
THIN LAYER SPECIAL CALIBRATION
The Thin Lift Special Calibration function allows the operator to re-
calibrate the gauge for materials not covered by the factory
calibration. Once a special calibration is enabled, it remains active
until the gauge is turned off, or until another calibration is enabled.
The thin layer special calibration uses the average of 3 to 20
measurements. Troxler recommends averaging one-minute readings
taken on a test site (see Figure 6–1 on page 6–13) or around a core
site (as shown in Figure 6–2). This average and the density obtained
by another method (such as core samples) are used to re-calculate
the gauge constants.
To access the Thin Lift Special functions, press the
〈
SPECIAL
〉
key.
At the Special functions menu, press
〈
1
〉
Special Operation. At the
Special Operation menu, press
〈
2
〉
Thin Lift Special. The gauge
displays the Thin Lift Special menu:
The gauge displays a thin layer special calibration on the first line, if
one exists in gauge memory. The following text provides details on
the
Thin Lift Special function.
Enable a Thin Layer Special Calibration
Use the arrow keys to scroll through the thin layer special
calibrations. When the gauge displays the thin layer special
calibration to be enabled, press
〈
1
〉
.
NOTE:
The 3450 gauge must be in Thin Layer mode to enable a
thin layer special calibration.
The gauge enables the selected thin layer special calibration and
returns to the
Ready screen.
Thin Spec:Current
1-Enable Thin Spec
2-Disable
4-New
3-View 5-Erase