DATREND Systems ES601-US, Руководство по эксплуатации

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ES601-US OPERATING MANUAL
Overview/Chapter 2
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Page 11
2.1.5 Leakage Current
Different safety standards require different types of leakage measurements to be performed. ES601-US
focuses on medical device testing and implements the four general types of leakage measurement specified
in the AAMI-ES1 and IEC60601 standards. The alternative leakage measurements and the direct leakage
measurements of the VDE0751 and IEC62353 safety standards are also provided. ES601-US can also
perform a leakage test according to the IEC61010 standard for laboratory instruments.
In all, ES601-US incorporates measurements encompassing the requirements of nine different electrical
safety standards used worldwide.
In accordance with the AAMI-ES1 and IEC60601 safety standards, the types of leakage measurement
performed by ES601-US are:
2.1.6 External Case Leakage Current
Depending on the safety standard, "external case leakage" may alternatively be referred to as "touch
current", "enclosure risk current" or "enclosure leakage".
In this test, ES601-US measures the current that flows from a metal part on the DUT enclosure that should
be grounded, to the actual ground from the AC electrical supply. The current is obtained by measuring the
voltage developed across a resistor/capacitor network simulating the AC impedance of the human body, as
defined by the safety standard. ES601-US measures the current in microamps, while simulating a variety of
test conditions at the equipment line cord and isolated data interfaces (for example, a transformer-isolated
ethernet port on the device under test or "DUT").
For each test condition, the current flowing out of the enclosure of the DUT to ground is measured and
compared to a maximum limit specified in the safety standard. When measuring the external case leakage,
ES601-US can be configured to record AC and DC values for these test conditions:
Normal Polarity Normal Condition
Single-Fault Condition, Neutral Open
Single-Fault Condition, Ground Open (NP:NORM.)
(NP:OPEN N.)
(NP:OPEN G.)
Reverse Polarity Normal Condition
Single-Fault Condition, Neutral Open
Single-Fault Condition, Ground Open (RP:NORM.)
(RP:OPEN N.)
(RP:OPEN G.)