Parameters In Configuration Mode - Texas Instruments ADS1230REF User Manual

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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
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
2.4 Configuration
The parameters for Scale mode can be adjusted in the configuration mode.
To enter configuration mode, press the VALUE buttons simultaneously. The four buttons then assume the
functions shown in the CONFIG box. To exit Configuration mode, press the VALUE 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.
Parameter
Display units
Averages
ADC speed
Calibration mass
Offset calibration
Save parameters
Version number
SBAU125A – August 2007 – Revised September 2007
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Table 2. Parameters in Configuration Mode
Display
UNIT= μg, mg, g, kg, lb, st, oz
AVGS=
SPD=
CW= 0–99.9 in various units
OCAL?
SAVE?
V1.1.0
Section 2.3 for details.
Section 3.4.1 for details.
Value Range Description
Display units
2–128 Number of points to
average
FAST, SLOW Acquisition rate
Calibration mass and unit
— Offset calibration; see
— Save parameters; see
— Firmware version number
display
ADS1230REF User's Guide
Weigh Scale Mode
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