Sirona Orthophos XG Plus DS/Ceph, Operating Instructions Manual

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1 Warning and safety information Sirona Dental Systems GmbH
1.2 ESD protective measures Operating Instructions ORTHOPHOS XG
Plus
DS/Ceph
59 87 594 D 3352
8
D 3352.201.01.18.02
1.2
ESD protective measures
ESD stands for E lectro S tatic D ischarge.
ATTENTION
Connector pins or sockets bearing ESD warning labels
must not be touched or interconnected
without ESD
protective measures .
ESD protective measures include:
• Procedures for preventing electrostatic charge
build-up (e.g. air conditioning, air moistening, con-
ductive floor coverings and non-synthetic clothing)
• Discharging the electrostatic charges of your own
body on the frame of the
UNIT
, the protective ground
wire or large metallic objects
• Connecting yourself to ground using a wrist band.
We therefore recommend that all persons working with
this system be instructed on the significance of this
warning label. Furthermore, they also should receive
training in the physics of electrostatic discharges which
can occur in the practice and the destruction of elec-
tronic components which may result if such components
are touched by electrostatically charged
USERS
.
The content of this training is explained in Chapter 1.3.
1.3
About the physics of electrostatic charges
ESD stands for E lectro S tatic D ischarge. Electrostatic
discharge must be preceded by electrostatic charging.
Static electric charges generally build up whenever two
bodies are rubbed against each other, e.g. when walking
(shoe soles against the floor) or driving a vehicle (tires
against the street pavement). The amount of charge
depends on several factors:
Thus the charge is higher in an environment with low air
humidity than in one with high air humidity; it is also
higher with synthetic materials than with natural materi-
als (clothing, floor coverings).
The following rule of thumb can be applied to assess the
transient voltages resulting from an electrostatic dis-
charge.
An electrostatic discharge is:
• perceptible at 3,000 V or higher
• audible at 5,000 V or higher (cracking, crackling)
• visible at 10,000 V or higher (arc-over)