Weigh Scale Mode
2.4.1
Parameters
Display units: The units to use when displaying mass. Available units are
μ
g (displayed as ug), mg, g, kg,
ounces (oz), pounds, (lb), and stone (st). See
for details.
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 installed ADS device, which are
called high-speed and low-speed. When high-speed mode is selected,
FAST
is shown; for low-speed
mode,
SLOW
is shown.
(1)
The actual data rate of the ADS1131 or ADS1231 depends on the frequency of the master clock, f
CLK
. In
fast mode, the data rate is f
CLK
/61440; in slow mode, the data rate is f
CLK
/491520. See the
or the
for 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 (
). The calibration mass can be given in any of the available units, in
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.
Save parameters: This screen allows the settings of the ADS1x31REF 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
ADS1x31REF 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 ADS1x31REF firmware.
(1)
The ADS1x31REF cannot detect the frequency of the ADS1231 master clock, so it cannot display the actual data rate of the ADS1231
device.
10
ADS1131REF and ADS1231REF
SBAU175A
–
July 2010
–
Revised August 2011
Copyright
©
2010
–
2011, Texas Instruments Incorporated
