Information On The Device Leakage Current Measurement - Siemens POLYMOBIL Plus Start-Up Instructions

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Perform the measurement according to DIN VDE 0751, Part 1 (see ARTD-
002.731.17...2). In this case the protective conductor resistance to all conductive parts
that can be touched must be measured in the normal operating state of the system.
It must be assured that control cables or data cables between the components of the sys-
tem simulate no protective conductor connection.
During the measurement the power supply cable and additional connection cables with
integrated protective conductors must be moved section by section to detect wire breaks.
The protective conductor resistance must not exceed 0.2 ohms.
Record and assess the values determined in the repeat measurement in the report 'Pro-
tective conductor resistance / report' stating the measuring points.
In addition document the measuring method and the measuring instrument used (desig-
nation and serial number).
NOTE

Information on the device leakage current measurement

Observe the statement in the safety engineering rules for installation and maintenance
(ARTD-002.731.17...).
WARNING
First measurement
Perform the device leakage current measurement after completion of all other work.
Perform the measurement according to DIN VDE 0751, Part 1 (see ARTD-002.731.17...)
and record the determined value as first measured value.
Measurement of the device leakage current according to the differential current method
(measuring arrangement according to Fig. 3) should be preferred, since no danger for the
measuring person and other persons arises during the measurement.
However, observe the minimum resolution of the leakage current measuring instrument
and additional manufacturer's data which restrict the use of the measuring instrument.
POLYMOBIL Plus
For the assessment the first measured value and the values docu-
mented during previous maintenance or safety checks must be
compared with the measured values.
An abrupt rise of the measured values,
even if the limit of 0.2 ohms is not exceeded,
indicates defects in the protective conductor connections
(protective conductor or contacting).
Electrical voltage!
Non-compliance can lead to severe injuries up to death.
The device leakage current measurement may be performed for
units of protective class I only after the protective ground wire
test has been passed.
SPR8-125.034.02
Rev. 02
Page 6 of 10
03.05 CS PS 24
Requirements
Siemens AG
Medical Solutions
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