Reference Measurement; Factory Calibration; Call-Up Of Calibration Menu; Flange Calibration - Bosch WBE 4200 Instandsetzungsanleitung

en 58 | WBE 4200 | Maintenance
10.4.5

Reference measurement

i
Exact centering of the wheel is a basic prerequisite
for this reference measurement and for all
balancing 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;
3. Close the wheel guard.
 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 WBE 4200 must display precisely this unbalance
(value and position) on this side. The value indicated
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
attachment 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. 90°.
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.
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1 695 600 091 2012-11-16
10.5

Factory calibration

i
We recommend carrying out the factory calibration
during software updating, replacement of the
pick-up, of the measurement unit or of the board,
following the sequence below:

1. Flange calibration

2. Calibration of electronic vernier caliper

3. Calibration with sample weight.
!
At the end of every calibration carry out a control
measurement.
10.5.1

Call-up of calibration menu

i
Sound and automatic start are active in the following
description.
1. Press and hold the <MENU> key.
2. As soon as CAL appears on the left-hand display,
release the <MENU> key.
3. Press the <OPERATOR> key within 1.5 seconds.
"
The left-hand display shows C-1.
10.5.2 Flange calibration
i
Follow the instructions for the standard calibration
(see chap. 10.4.2).
10.5.3 Calibration of electronic vernier caliper
i
Follow the instructions for the standard calibration
(see chap. 10.4.3).
Robert Bosch GmbH