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Descrição
Within the Smart Compression Cell is a multilayer printed circuit board with a power regulator which supplies an excitation voltage to the Wheatstone bridge. The uncompensated output of the bridge is fed through an A/D converter and digital filter. A microprocessor controls the A/D converter, a temperature sensor and the digital output interface. The SCC offers an extensive diagnostics structure which verifies the integrity and operation of the strain gauge circuit, power supply, EEprom, A/D converter and temperature sensor. Smart Compression Cells produce a strong output signal, which is unaffected by electrical noise and temperature fluctuations on field cabling, thereby enabling the use of cable lengths up to 1200m. A surge protection device has been integrated to protect against overvoltages, such as lightning strikes.