C-Tech EDG-1S, Руководство по эксплуатации продукта

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EDG tests are performed by first selecting the project menu, then testing with EDG. The EDG test is
performed by (first) driving four Soil Darts into the Test Spot at four quadrant points of a twelve inch
(12") circle. A Template is provided to ensure accurate positioning of the Soil Darts. The Soil Sensor
is then set up on the Template to make it easy to connect the Sensor fins to the Darts in the required
sequences.
Two configurations are tested to assure that a good electrical signature of the soil is obtained. They
are labeled A↔A and B↔B. The EDG programming will guide the operator through each different
configuration.
Simply, the A↔A connection might be a North -South connection of the Sensor Pins to the nearest
Darts. When switching wires, it is important that two wires connecting the Soil Darts are not allowed
to be crossed (the space between the wires never be allowed to be less than 1 inch), otherwise there
may be some small errors introduced in the measurement. The other B-B test would be an East-West
configuration. When the test (or more specifically, Field Test) is completed, the EDG will immediately
display the measured Wet Density, Dry Density, Moisture Content, and Percent Compaction
(associating Soil Model in advance). This data is stored for later viewing from the EDG or from Data
Sharing mode using a PC and a Windows TM EDG software application.
The Data Sharing mode of the EDG interacts with the EDG software running on a PC and allows the
operator to share project and Soil Model data with the PC application.
VI. Making a Soil Model
A Soil Model must be created so that the soil electrical signature can be correctly related to the
physical characteristics of that soil type. It is important that the Soil Model be created with the same
soil type at Test Spots of differing moisture content and dry density. EDG Results suffer considerably
when the moisture contents are limited to either a high or a low range only. Probably the best soil
model will result when samples of soil with moistures at 5.0%, 7.5%, and 10.0% are used as Test
Spots.
The ideal Test Spots for Soil Model samples will probably look like this:
98% compaction with 5% moisture
98% compaction with 7.5% moisture