Texas Instruments ADS1230REF User Manual page 10

Weigh Scale Mode
2.4.1 Parameters
Display units: The units to use when displaying mass. Available units are μg (displayed as ug), mg, g, kg,
ounces (oz), pounds, (lb), and stone (st). See
Averages: Number of points to use when reading weight. The choices available are 2, 4, 8, 10, 16, 32,
50, 64, 100, and 128. The default is 50.
ADC speed: This parameter selects between the two data rates on the ADS1230, which are called
high-speed and low-speed. When high-speed mode is selected, FAST is shown; for low-speed mode,
(1)
SLOW is shown.
The actual data rate of the ADS1230 depends on the frequency of the master clock, f
data rate is f /61440; in slow mode, the data rate is f
CLK
further information.
The default setting is low-speed mode.
Calibration weight: This parameter gives the expected mass of the calibration weight used in the
calibration procedure
three significant figures. The unit is independent of the display unit.
Each digit in the mass is adjusted separately. The currently-selected digit flashes, and can be adjusted
with the VALUE buttons. The PARM buttons are used to select the digit. The unit is adjusted in the same
manner, and flashes when selected.
When the unit is changed, the value changes to the equivalent mass in the new unit.
Offset calibration: This screen has the same function as it does in Analysis mode. See
section 2.3 for information.
Save parameters: This screen allows the settings of the ADS1230REF to be stored in flash memory. It
functions the same as it does in Analysis mode. When ENT or SEL is pressed on this screen, the
ADS1230REF saves its settings to flash memory. These settings are loaded from flash memory when the
board is reset or powered on. All operating parameters are saved, including scale calibration settings,
voltage reference, display mode, and units.
Version number: This screen displays the version number of the ADS1230REF firmware.
(1)
The ADS1230REF cannot detect the frequency of the ADS1230 master clock, so it cannot display the actual data rate of the ADS1230
device.
10 ADS1230REF User's Guide
Section 2.1
(Section 2.3). The calibration mass can be given in any of the available units, in
for details.
/491520. See the ADS1230 data sheet
CLK
SBAU125A – August 2007 – Revised September 2007
www.ti.com
. In fast mode, the
CLK
for
Calibration
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