Sbm 55 Nw Calibration; Reference Measurement; Self-Diagnosis - Sicam SBM 55 NW Manual Original

en 54 | SBM 55 NW | Maintenance
12.3.3

SBM 55 NW calibration

1. Call up the calibration menu (refer to Section 12.3.1)
2. Press the <MENU> key until C-2 appears on the left-
hand display.
3. Attach a motor vehicle wheel of medium size (e.g.
rim width 5.5", rim diameter 14") and in very good
condition to the flange.
4. Enter the rim data (refer to Section 8.3).
5. Close the wheel guard.
 Measurement commences.
 The left-hand display shows C-3, the right-hand
display shows 60.
6. Enter any balance weight between 40 g and 120 g
(suggested value: 60 g).
 The new value is displayed on altering the balan-
ce weight.
7. Attach a balance weight of the value entered to the
inner side of the wheel.
8. Close the wheel guard.
 Measurement commences.
 The left-hand display shows C-4.
9. Turn the wheel until the balance weight is in the 12
o'clock position.
10. Remove the balance weight from the inner side
of the wheel and attach it to the outer side (12
o'clock position).
11. Close the wheel guard.
 Measurement commences.
 The left-hand display shows C-5.
12. Turn the wheel until the balance weight is in the 6
o'clock position.
 The calibration angle value is displayed.
13. Press the <SPLIT> key.
"
This completes SBM 55 NW calibration.
i
The calibration made is permanently stored automa-
tically.
12.3.4

Reference measurement

i
Exact centering of the wheel is a basic prerequisite
for this reference measurement and for all balan-
cing operations.
i
In the following description the audio is activated.
1. Attach a motor vehicle wheel of medium size (e. g.
width 5.5", diameter 14") and in very good condition
to the flange.
2. Enter the wheel data (refer to Section 8.3).
3. Close the wheel guard.
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 Measurement commences.
4. Create an artificial unbalance by attaching a test
weight of e. g. 60 g to one of the two sides.
5. Close the wheel guard.
 Measurement commences.
 The SBM 55 NW must display precisely this unbalan-
ce (value and position) on this side. The value indica-
ted for the other side must not exceed 5 g.
i
To check the position of the unbalance, turn the
wheel until the position recommended for attach-
ment of the balance weights is attained. The test
weight attached must be vertically beneath the axis
of rotation (6 o'clock position).
!
Calibration must be repeated in the following cases:
$
Deviation from specified unbalance value
(greater than 1 g on test weight side, more than
5 g on other side).
$
Deviation from specified unbalance position (test
weight not between 5:30 and 6:30 position).
6. Remove the test weight.
7. Release the wheel and turn it through approx. 35°.
8. Re-attach the wheel.
9. Close the wheel guard.
 Measurement commences.
"
On completion of this reference measurement, the
display must not exceed a maximum unbalance of 10 g
per side (15 g for particularly heavy wheels). This error
may be caused by the rim centering tolerances. If this
reference measurement indicates greater unbalance,
the components used for centering the wheel must be
checked for wear, play and contamination.
12.4

Self-diagnosis

i
ATTENTION: Press <MENU> for 1.5 seconds and re-
lease it to access the self-diagnosis menu, reserved
to technical assistance.
"
POT appears in the left-hand display and the current
setting in the right-hand display.
"
To exit press <SPLIT>
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