Preparation for Use
MOBILE WORKSTATION WM-DP1
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Chapter 4 Preparation for Use
NOTE
• Multiple fixing positions are provided enabling the shelves to be raised
or lowered to accommodate varying equipment configurations (see 4.2).
• The mobile workstation is designed for use with Olympus OEV LCD
monitors and other monitors that meet the VESA standard. Contact
Olympus regarding compatibility of other monitors.
4.1 General information
Installation of endoscopic video systems requires an understanding of EN IEC 60601-1-1:2001,
the international collateral standard for the safety of medical electrical systems.
This standard requires systems to meet the leakage current requirements of the general medical
electrical safety standard, EN IEC 60601-1, which allows a maximum earth leakage current of
0.5mA in normal condition.
A separation transformer is required under certain circumstances, as combined earth leakage
currents may result in excessive enclosure leakage current under single fault conditions, such as
the interruption of a common protective earth path.
In order to meet EN IEC 60601-1-1:2001, a separation transformer will be required in a system
under one of the following conditions:
(i) Ancillary equipment that does not meet the leakage current requirements of
EN IEC 60601-1 is used (or could be used) within the ‘patient environment’ (as defined
in EN IEC 60601-1-1:2001, that is within a 1.5m radius of, or 2.5m above, the patient
bed). The separation transformer must be used to supply the ancillary equipment, but
may also be used to supply medical electrical equipment, as long as the maximum
transformer rating is not exceeded.
(ii) The total earth leakage current from a combination of medical equipment is above
0.5mA. The separation transformer must be used to supply sufficient of the medical
electrical equipment to reduce the total system earth leakage current to below the above
limit, as long as the maximum transformer rating is not exceeded. High intensity light
sources use arc lamps, which require a high start-up current. It is not recommended for
these to be supplied from the isolation transformer, otherwise its maximum rating may be
exceeded. The transformer may also be used to supply ancillary equipment forming part
of the system as long as the maximum transformer rating is not exceeded.
