| 摘要 |
<p>The electronic soil frostmeter is defined as by its design of a minimum two concentric double coated plates (1) and (2) printed circuits, where the metering electrodes are established (3) by etching, when on the board (1) electrodes (3) are interconnected by means of a labyrinth (6) so as the transfer of heat via the conduct between electrodes (3) is limited to the maximum extend, while the center is connected to the terminal, and to ensure the transfer of heat from one side of the printed board to the other electrodes (3) are coated, while on the other board (2) individual electrodes (3) are connected to the terminal, while there is the moisture absorbent insert (4) fitted between boards (1) and (2), which is saturated by water, while the entire set is sealed in plastic foil, when the power supply (7) of the device is provided by the generator (G), fitted with the stabilizer of the output AC voltage, actuated (9) from the metering module (MM).
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