Datenblatt-Suchmaschine für elektronische Bauteile |
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ES237 Datenblatt(PDF) 7 Page - Cyrustek corporation |
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ES237 Datenblatt(HTML) 7 Page - Cyrustek corporation |
7 / 37 page V 2.2 7 2015/12/15 ES237 6000 Counts DMM Function Description 1. Operating Modes 1.1. Semi-auto calibration scheme ES237 includes DMM & Clamp-on meter features in single chip. DMM manufacturers need the calibration process in production. The traditional solution needs the variable resistors for calibration by manual adjustment. ES237 provide another calibration scheme and the most variable resistors could be ignored. When ES237 is at OFF-state, pull CALENP (pin 51) to V- to active the calibration scheme after re-power on. A digital controlled voltage output will be active from DACO. When semi-auto calibration scheme is active, use HOLD (or BKLIT) key to decrease voltage and use RANGE (or MMX) key to increase the voltage. Decrease the reference voltage means the counts on display will be increased. Increase the reference voltage means the counts on display will be decreased. The adjustment step is approximate one count. If coarse adjustment is required, push HOLD (or BKLIT) and RANGE (or MMX) larger than one second to speed up to approximate 10 counts per second. After calibration process is finished, push HOLD (or BKLIT) and RANGE (or MMX) less than 1 sec. simultaneously to save the digital control code to external EEPROM (24LC02). The semi-auto calibration scheme supports the following nine measurement modes. When CALENP pin is active, set the proper function switches or push KEY to choose the target measurement mode. When mode is selected, the LCD segment of Unit at related measurement will be blinking. Mode Default Range For CAL Remark Voltage Measurement 6.000V (DC/AC separated) Accuracy of other ranges is guaranteed by external resistor. mV Voltage Measurement 600.0mV (DC/AC separated) DC Current Measurement For Multimeter (uA/mA) 600.0μA or 6000μA ( 2 modes choose one for calibration ) Auto 2 ranges choose one, proposed to use a large range to calibration. AC Current Measurement For Multimeter (uA/mA) 600.0μA or 6000μA (2 modes choose one for calibration ) Auto 2 ranges separated for calibration is necessary. DC Current Measurement For Multimeter (A) 6A or 20A Auto 2 ranges choose one, proposed to use a large range to calibration. AC Current Measurement For Multimeter (A) 6A or 20A Auto 2 ranges individual for calibration is necessary. DC Current Measurement For Clampmeter 600.0A or 6000A ( 6 modes choose one for calibration ) Auto 2 ranges choose one, proposed to use a large range to calibration. AC Current Measurement For Clampmeter 600.0A or 6000A ( 6 modes choose one for calibration ) Auto 2 ranges separated for calibration is necessary. Capacitor Measurement 60.00nF Temperature Measurement 600.0℃ Lower range in auto temperature measurement. ADP Measurement 6000 / 600.0 / 60.00 / 6.000 4 ranges separated for calibration. After calibration procedure is finished, set ES237 to OFF-state and set CALENP (pin51) to DGND or kept floating to return to normal mode operation after re-power on. |
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Ähnliche Beschreibung - ES237 |
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