- 14 -
REAL CALIBRATION (WITH SAMPLE WEIGHTS)
After having performed the THEORETICAL CALIBRATION and TARE WEIGHT ZERO
SETTING, this function allows correct calibration to be done using sample weights of known
value and, if necessary, any deviations of the indicated value from the correct value to be
corrected.
Load onto the weighing system a sample weight, which must be
at least 50%
of the maximum
quantity to be weighed.
By confirming the message
the flashing value of the weight currently on the system is
displayed. In this phase all of the symbols are off. Adjust the value on display by using the arrow
keys if necessary. After confirming, the new set weight will appear with all the symbols flashing.
After an additional confirmation, the message
will be restored and by repeatedly pressing
the key ESC the weight will once again be displayed.
Example
: for a system of maximum capacity 1000 kg and 1 kg division, two sample weights are
available, one of 500 kg and the other one of 300 kg. Load both weights onto the system and correct
the indicated weight to 800. Now remove the 300 kg weight, the system must show 500; remove the
500 kg weight too; the system must read zero. If this does not happen, it means that there is a
mechanical problem affecting the system linearity.
WARNING: identify and correct any mechanical problems before repeating the procedure.
-
If theoretical full scale and recalculated full scale in real calibration are equal, it means
that the theoretical calibration is currently in use; otherwise, the real calibration based on
sample weights is in use.
-
If the correction made changes the previous full scale for more than 20%, all the
parameters with settable weight values are reset to default values.
LINEARISATION OPTION ON MAX 5 POINTS:
It is possible to perform a linearisation of the weight repeating the above-described procedure
up to a maximum of five points, using five different sample weights. The procedure ends by
pressing the
ESC
button or after entering the fifth value;
at this point it will no longer be possible
to change the calibration value, but only to perform a new real calibration. To perform a new
calibration, should return to the weight display and then re-entering into the calibration menu.
By pressing
▲
after having confirmed the sample weight that has been set, the full scale appears,
recalculated according to the value of the maximum sample weight entered and making reference to
the cell sensitivity set in the theoretical calibration (
).
+
