Troxler Enhanced RoadReader Plus 3451, Руководство по эксплуатации и инструкции

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6–
SPECIAL CALIBRATION
The Special Calibration features allow the operator to recalibrate
Model 3451 soil and thin layer readings. Special calibrations are
specific for the test material and measurement depth. To access
these features, press the
〈
Change Settings
〉
button on the
RoadReader Plus main menu (see Figure 3–11 on page 3–18). The
PDA displays the
Change Settings
menu shown in Figure 5–1 on
page 5–2.
In Soil mode, the PDA can activate a special calibration for each
source rod depth.
NOTE
A soil special calibration is active only at the source rod
depth at which it was created. For proper operation,
create a soil special calibration for each required
measurement depth.
Before performing a special calibration, prepare the sample area for
testing as described in
Chapter 4 .
SOIL SPECIAL CALIBRATION
The factory calibration provides accurate results for the majority of
materials encountered in the field. However, there are situations
when varying material compositions and/or texture could affect the
gauge accuracy.
The Soil Special Calibration function is used to recalibrate the
Model 3451 gauge for material characteristics not covered by the
factory calibration. The “true density” can be determined by
carefully measuring samples of a known material using an alternate
method in a laboratory or in the field. This function is activated only
in
Soil mode.
To access the Soil Special Calibration function, press the
〈
Special Calibration
〉
button on the Change Settings menu
(see Figure 5–1). The PDA displays the Special Calibration
Menu shown in Figure 6–13. The following sections provide details
on the Special Calibration function.