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AD-4430B
5.3.8.
Error Codes For The Calibration
When an error occurs during calibration, the error number is displayed.
If calibration is finished without removing the error, the setting values will be restored to the state
before calibration.
Calibration errors and remedies
Error No.
Description
Treatment
The display resolution (weighing
capacity / minimum division)
exceeds the specified value.
Make the minimum division greater or make the
weighing capacity smaller. The specified value
depends on specifications of the weighing system.
Voltage at zero calibration
exceeds in the positive direction.
Check the load cell rating and connection. When
nothing is wrong with the rating and connection,
adjust the load cell output as described in the next
section. When the load cell or A/D converter may
be the cause of error, confirm this by using the
check mode.
Voltage at zero calibration
exceeds in the negative direction.
The value of the calibration weight
exceeds the weighing capacity.
Use an appropriate calibration weight and
calibrate again.
The value of the calibration weight
is less than the minimum division.
The load cell sensitivity is not
sufficient.
Use a load cell with higher sensitivity or make
the minimum division greater.
Voltage at span calibration is less
than voltage at the zero point.
Check the load cell connection.
The load cell output voltage is too
high when the load of the
weighing capacity is placed.
Use a load cell with a greater rating or make the
weighing capacity smaller.
5.3.9.
Adjustment Of The Loadcell Output
Add a resistor as shown below to adjust the load cell output.
Use a resistor with a high resistance value and a low temperature coefficient.
Because the zero point of the module has a wide adjustable range, as long as there is no
problem with a load cell, correcting an output by the module is hardly ever required.
Before an output correction is carried out, confirm load cells (deformation, wiring mistakes,
contact with anything, or model selection etc.) and connections.
When exceeding in the positive direction.
EXC
+
SIG
+
SIG
-
EXC
-
Resister added
When exceeding in the negative direction.
EXC
+
SIG
+
SIG
-
EXC
-
Resister added
Illustration 10 Load cell output adjustment
