SICE S 63 Manual De Instrucciones página 54

Take great care to position the arm correctly
so as to ensure accurate data reading.
- Keep the arms in contact with the rim until
the machine has acquired the values. The
geometric data are displayed in sequence:
• d distance value;
• di diameter value;
• Lr width value.
When a geometric value is displayed, the
corresponding LED illuminates on the
display panel.
- Check the values measured and then
return the arm to the rest position.
- If an incorrect value has been acquired
during the measurement phase, move the
arms to the rest position and then repeat
the operation.
Measurements can also be taken by
moving one measuring arm at a time. In
this case, sensors can be used with no
preset order. Pay maximum attention to
the measured data since they are influ-
enced by the stored ones.
After setting geometric dimensions cor-
rectly and returning the sensors to the
rest position, the unbalance values recal-
culated according to the new dimensions
are displayed.
IMPORTANT
Bear in mind that the wheel's nominal
diameter (e.g. 14") refers to the planes
on which the tyre bead rests, which are
54
obviously inside the rim. On the other
hand, the data measured refer to external
planes, so they will be lower than the rated
values because of the thickness of the rim.
The correction value therefore refers to an
average thickness of the rim. This means
that the data measured on wheels with
different thicknesses may vary slightly (2
or 3 tenths of an inch maximum) from the
rated values. This is not a lack of accuracy of
the measuring devices, but reflects reality.
If the automatic measuring arm fails to
10b
operate, the geometrical data can be
entered in manual mode by following
the procedure indicated in the paragraph
"manual wheel data entry".
Manual wheel data entry
In the event of failure of the automatic
measuring system and in the version with
internal manual sensor, the geometrical
data can be entered using the keypad:
- Press the
- Measure the width of the rim using the
provided calliper (fig. 11).
- Modify the width value displayed by
pressing the keys
desired number is set. The width can be
set in millimetres or the values already
set can be converted from inches to mil-
button.
11
until the
User manual S 63