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ES51982 Folha de dados(PDF) 8 Page - Cyrustek corporation |
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ES51982 Folha de dados(HTML) 8 Page - Cyrustek corporation |
8 / 21 page 08/09/09 8 ES51982 3 1/2 CAP AUTO DMM 1.3 Current measurement Current measurement has three modes. The following table summarizes the full scale range of each mode. Mode Range Selection Full Scale Automatic Mode 1 µA 200.0µA / 2000µA Automatic Mode 2 mA 20.00mA / 200.0mA Automatic Mode 3 A 20.00A/2.000A Manual Mode A 20.00A 1.4 Capacitance Measurement The following table summarizes the eight ranges of capacitance measurement mode. Configuration Full Scale Range Resistance Ratio C1 2.000nF R1 C2 20.00nF R1∥ R2 C3 200.0nF R1∥ R3 C4 2.000µF R4 C5 20.00µF - C6 200.0µF - C7 2mF - Note: 1. In order to obtain an accurate reading, a capacitor must be discharged before measurement begins. The chip has a built-in discharge mode to automatically discharge the capacitor. In discharge mode, the LCD displays DS.C 2. Discharging through the chip is quite slow. We recommend the user to discharge the capacitor with some other apparatus. 1.5 Continuity Check Continuity check shares the same configuration with 200.0Ω manual resistance measurement mode, but with buzzer output to indicate continuity. The buzzer generates a 2KHz sound whenever the digit number less than 25Ω. Because the cycle time of measurement is only 50ms, the least significant digit will not display. 1.6 Diode Measurement Diode measurement mode shares the same configuration with 2.000V manual voltage measurement mode. If the test circuit is open or the voltage drop between the two ports of the device (diode) under test is larger than 2V, the LCD panel will show “OL”. The buzzer generates a 2KHz sound whenever the digit number is less than 0.25V. Because the cycle time of measurement is only 50ms, the least significant digit will not display. |
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