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BAT54 датащи(PDF) 9 Page - Texas Instruments |
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BAT54 датащи(HTML) 9 Page - Texas Instruments |
9 / 31 page www.ti.com Weigh Scale Mode 2.2.2 RANGE The RANGE button changes the units or range of the display. RANGE cycles through all available units; see Section 2.1 for details. When the RANGE button is depressed, it displays the selected unit. 2.2.3 CAL Pressing CAL initiates the two-point calibration sequence. See Section 2.3 for details. 2.3 Calibration Two-point calibration is performed by pressing the CAL button. When this button is pressed, the board executes the following command sequence: 1. The board scrolls the message, REMOVE WEIGHT. 2. The user removes all weight from the load cell and presses any button. 3. The board measures the load cell voltage and records it as the zero point. 4. The board scrolls the message PLACE CAL WEIGHT. 5. The user places a weight on the load cell and presses any button. The weight should have the mass that was selected in the configuration mode. 6. The board measures the load cell voltage and records it as the calibration weight. New calibration data is lost when power is removed. To prevent this data loss, calibration data can be saved, with other board settings, to flash memory. See Section 3.4.1 for details. 2.4 Configuration The parameters for Scale mode can be adjusted in the configuration mode. To enter configuration mode, press the PARM buttons simultaneously. The four buttons then assume the functions shown in the CONFIG box. To exit Configuration mode, press the PARM buttons simultaneously again. This function does not cause parameters to be adjusted, because only button releases are detected in Configuration mode. Configuration mode contains a number of adjustable parameters. To scroll through the available parameters, use the PARM buttons. To change the parameter values, use the VALUE buttons. Some items in configuration mode are not parameters, but commands or gateways to a submenu. These items are labelled as words with a question mark. To enter these or to execute the command, press SEL or ENT. All parameters in the analysis and scale configuration menus are independent, including the parameters found in both modes. Table 2 summarizes the available parameters. Table 2. Parameters in Configuration Mode Parameter Display Value Range Description Display units UNIT= μg, mg, g, kg, lb, st, oz Display units Averages AVGS= 2 –128 Number of points to average ADC speed SPD= FAST, SLOW Acquisition rate Calibration mass CW= 0 –99.9 in various units Calibration mass and unit Save parameters SAVE? — Save parameters; see text Version number V1.0.0 — Firmware version number display 9 SBAU175A – July 2010 – Revised August 2011 ADS1131REF and ADS1231REF Submit Documentation Feedback Copyright © 2010–2011, Texas Instruments Incorporated |
Аналогичный номер детали - BAT54 |
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Аналогичное описание - BAT54 |
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