西门子SIPLACE S-27 HM用户手册.pdf - 第69页
User Manual SIPLAC E S-27 HM 2 Operational safety Software vers ion SR.503.xx 07/ 2003 US Edition 2.10 Em issions and ergonomic s of the touchscree n monitor 69 2.10 Em issions and ergonomics of the touchscreen monitor 2…
2 Operational safety User Manual SIPLACE S-27 HM
2.9 Lock out and tag out procedure Software version SR.503.xx07/2003 US Edition
68
2.9.6 Review
This procedure will be reviewed and amended as required but in no case less frequently than
once a year.
User Manual SIPLACE S-27 HM 2 Operational safety
Software version SR.503.xx 07/2003 US Edition 2.10 Emissions and ergonomics of the touchscreen monitor
69
2.10 Emissions and ergonomics of the touchscreen monitor
2.10.1 X-ray radiation
The X-ray radiation generated in the monitor is adequately shielded by the intrinsically safe cath-
ode-ray tube. The local emissions are less than 1 S/h (micro-Sievert per hour). The accelerating
voltage is limited by the device to a maximum of 26 kV.
The monitor conforms to the German Directive for protection against harmful X-ray radiation. The
X-ray emissions from the monitor conformed to the DHHS Rules 21 CFR, subsection J on the
date of manufacture and to the FCC Rules, part 15.
2.10.2 Ergonomics and electromagnetic emissions
The monitor fulfills the conditions for ergonomics (to ISO 9241-3) and safety (to EN 60950).
The low-frequency electromagnetic emissions fall below the MPR II guidelines issued by the
Swedish Radiation Institute in Stockholm.
2 Operational safety User Manual SIPLACE S-27 HM
2.11 ESD guidelines Software version SR.503.xx07/2003 US Edition
70
2.11 ESD guidelines
2.11.1 What does ESD mean?
Almost all of the modules in use today are equipped with highly integrated MOS blocks and com-
ponents. The manufacturing techniques used mean that these electronic components are
extremely sensitive to overvoltage and thus to electrostatic discharge.
The abbreviation for such modules is 'ESD'
(Electrostatic Sensitive Device). ’ESD’ is used inter-
nationally.
The following symbol on cabinet rating plates, racks or packaging indicates that components
which are sensitive to electrostatic discharge have been used and thus that the modules con-
cerned are also touch-sensitive.
ESDs can be destroyed by voltages and power levels that are far below the
level that can be perceived by humans. Such voltages occur if a person
touches a component or module without earthing themselves. Components
that are exposed to such overvoltages do not generally appear to be defective
immediately - incorrect behavior starts after the component or module has
been in operation for some time.
2.11.2 Important measures to protect against static charging
– Most plastics can easily become charged and must therefore be kept away from at-risk com-
ponents.
– Always ensure that people, the workplace and packaging are safely earthed when handling
electrostatic sensitive components.
2.11.3 Handling ESD modules
Do not touch electronic modules unless it is absolutely essential to do so in order to carry out
other work. If it is necessary, make sure that you do not touch the pins or printed conductors
when you pick up flat modules.
Do not touch components unless
– you are constantly earthed by an ESD wrist strap or
– you are wearing ESD shoes or ESD shoe earthing strips on an ESD floor.