Corghi EM9780 plus Manual De Uso página 87

Consult the following table to choose the most
suitable fire extinguisher.
Dry materials
Water
Foam
Powder
CO2
Flammable liquids
Water
Foam
Powder
CO2
Electrical equipment
Water
Foam
Powder
CO2
YES** Use only
extinguishers are not at hand and when the fire
is small.
WARNING
The indications in this table are of a general
nature. They are designed as a guideline for
the user. The applications of each type of extin-
guisher will be illustrated fully by the respective
manufacturers on request.
GLOSSARY
Here is
a brief description of some technical
terms used in this manual.
UNBALANCE CALIBRATION
This procedure calculates suitable correction
coefficients starting from known operating con-
ditions. It improves the machine accuracy by
correcting to a certain extent the calculation er-
rors that may result from the alteration of the
machine's features over the course of time.
CENTRING
Procedure for positioning the wheel on the
wheel balancer shaft to ensure that the shaft
axis corresponds to the wheel rotation axis.
BALANCING CYCLE
Sequence of operations to be performed by
the user and the machine from the beginning of
EM9780 plus - EM9780 C plus AutomaticLine - Operator's manual
YES
YES
YES*
YES*
NO
YES
YES
YES
NO
NO
YES
YES
if more appropriate
the spin until the wheel is braked to a stop after
calculating the unbalance values.
CONE
Conical element with a central hole which, when
inserted on the wheel balancer shaft, is used to
centre the wheels having central holes with a
diameter ranging between maximum and mini-
mum values.
RUNOUT
This is represented by a sinusoidal wave form
having a specific width, which indicates geo-
metric deformations in the radial direction.
Since tyres and rims are never perfectly round,
there is always a certain amount of runout (or
radial runout first harmonic) for the wheel (or
assembly). If the runout width is greater than a
specified threshold, vibrations may be generat-
ing while driving the vehicle even after an ac-
curate balancing was performed.
The speed at which these vibrations may be
generated depends on the structural features
of the vehicle. Generally speaking, this (critical)
speed is about 120-130 Km/h for common pas-
senger vehicles.
DYNAMIC BALANCING
Procedure for unbalance compensation by
applying two weights, one on each of the two
wheel sides.
STATIC BALANCING
Procedure for correcting only the static element
of the unbalance, by applying only one weight,
usually at the centre of the rim well. Accuracy
increases as the width of the wheel decreases.
RIM SUPPORT FLANGE
(of the wheel balancer)
Circular crown-shaped disk against which the
disk of the wheel mounted on the wheel bal-
ancer rests. Also used for keeping the wheel
perfectly perpendicular to its rotation axis.
FLANGE (adapter - centring accessory)
Device for supporting and centring the wheel.
Also used for keeping the wheel perfectly per-
pendicular to its rotation axis.
It is mounted on the wheel balancer shaft.
RING NUT
Wheel blocking device on the wheel balancer, fit-
ted with elements for coupling with the threaded
UK
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