A&D AD-4408C, Instruction Manual

Page: 22 / 68

AD-4408C Weighing Indicator
Page 20
7. Calibration
7.1. General Description
In the calibration mode, the operation to relate the output voltage from a load cell to the
mass value and other operations directly related to weighing are performed.
Calibration with an
actual load
Calibration is performed using a calibration weight.
•
Zero calibration: Adjusts the indicator so that the
measured value will be zero when no
load is applied to the load cell.
•
Span calibration: Enter the calibration weight value and
place the calibration weight on the load
cell.
When the indicator enters the mode of calibration with an
actual load, the tare weight and the zero value will be
automatically cleared.
Calibration-related
function
Setting basic constant values of the indicator such as the
minimum division and weighing capacity and other data
directly related to weighing is performed.
Setting the parameters for digital span calibration is also
performed.
Digital span
Calibration is performed without an actual load, by keying in
the load cell output voltage (mV/V).
•
Input voltage at zero: Key in the load cell output at zero.
•
Input voltage at span: Key in the load cell output at span.
(Load cell output at full capacity – load cell output at zero)
•
Calibration weight value at span:
Key in the calibration weight value
corresponding to the input voltage at
span.
(The input voltage at span is related to the mass value.)
All data initialization
Clears all the data in the EEPROM and battery backup
RAM.
NOTE: All the data set in the calibration mode is stored in the EEPROM and is
maintained regardless of battery condition.