Siemens SITRANS SL Operating Instructions Manual page 195

Electrostatic charging
Anyone who is not connected to the electric potential of their surroundings can be
electrostatically charged.
The following figure shows the maximum electrostatic voltage which may build up on a
person coming into contact with the materials indicated. These values correspond to
IEC 801-2 specifications.
Figure A-2
It is of utmost importance that ESD protective procedures are used during service in the
field. The components used in the laser analyzer have all been protected from ESD through
the whole production chain.
Ground Everything
Effective ESD grounds are of critical importance in any operation, and ESD grounding
should be clearly defined and regularly evaluated. According to the ESD Association
Standard ANSI EOS/ESD all conductors in the environment, including personnel, must be
bonded or electrically connected and attached to a known ground, bringing all ESD
protective materials and personnel to the same electric potential. This potential can be above
a "zero" voltage ground reference as long as all items in the system are at the same
potential. It is important to note that non-conductors in an Electrostatic Protected Area (EPA)
cannot lose their electrostatic charge by attachment to ground.
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
Electrostatic voltages that can be charged to an operator
A.2 ESD (ElectroStatic Discharge)
Appendix
197