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XI.
Notice
1. EDG is a kind of instrument based on electromagnetic measurement. The measuring energy
present when using EDG is less than one tenth of that when you are using a cell phone. There is no
nuclear radiation and it is absolutely safe!
2. EDG itself cannot measure the density and moisture content directly and need to associate
physical data with electronic data by creating the Soil Model. Therefore, EDG accuracy is dependent
upon the accuracy of the calibration of the Soil Model, and the precision of the standard physical
tests.
3. When the measurement is conducting, a stable electromagnetic field is created between two soil
darts and the strength of electromagnetic field is directly related to the distance between darts,
which eventually effect the precision of measurement. Therefore, when driving the darts using
hammer, try to keep the positions of darts and the hole on the template fixed and guarantee the
darts are vertical to the ground to maximum extent.
XII.
EDG Technical Specifications
EDG is packaged in a water-resistant enclosure and employs water resistant connectors, but it is not
intended for use during rain.
EDG will operate correctly to an altitude of 10,000 ft
Wet Density Range: As found in typical compacted earth sites, with Dry Density Accuracy: Typically
within 3% of standard physical tests
Moisture Content Range: As found in typical compacted earth sites, with Moisture Content Accuracy:
Typically within 3% of standard test
Internal Power: 3.7V lithium battery, 16800mAh capacity; Battery Time: about 24 hours
Ambient Temperature Range: a deg. C to 50 deg. C; Ambient Humidity Range: 5% to 90% non-
condensing
Memory Capacity:
Soil Models: Approx. 48
