Troxler EGauge 4590, Manual Of Operation And Instruction

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Model 4590 2–3
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The Troxler Model 6760 Moisture Probe, supplied with the
Model 4590 EGauge, uses dielectric measurement technology
to indicate the moisture content of the soil being measured. If a
moisture value is known by the gauge the moisture content,
percent moisture and Dry Density value can be reported and
the % Proctor can also be calculated. The EGauge also allows
the moisture value (%M) to be entered using the keypad if
another moisture measurement method is specified.
The probe is approx. 5.5 inches (14 cm) in length and the
moisture measurement occurs from 3.5 inches (8.9 cm) to the
bottom (tip) of the probe. The probe is inserted in the same
predrilled hole that the EGauge uses for the density
measurements. It is important that the probe be inserted in the
predrilled hole carefully as it requires a tight fit in order to
achieve a reliable reading. For this reason, it may be best to
perform the density measurement first because the probe could
damage the hole.
The EGauge is preprogrammed with 3 generic soil profiles:
General, Clay and Cr. Aggregate. General is best used when
measuring granular and non-clay type materials, Clay is used on
materials classified as clay and the Crushed Aggregate profile is
for aggregate subbase material. It is also recommended that the
user adjust the probe readings to the particular material being
measured using either the Moisture Probe Calibration or the
Moisture Probe Offset. This will ensure the most accurate
results.
The Moisture Offset is a simple procedure and generally works
well to adjust the probe to measure moisture of most typical fill
materials. The Moisture Probe Calibration is another option
that requires a bit more work and can be used in situations
where the material may have a wide range of moisture values.