QuadTech Guardian 6100 Plus Instruction Manual page 31

Leakage Current (LC):
Leakage Current:
Applied Part LC Test:
Earth LC:
Enclosure LC:
Patient LC:
Patient Auxiliary LC:
Limit
High Limit:
Low Limit:
Operation
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The residual flow of current that flows through the
insulation after a high voltage has been applied for a period
of time. The leakage current is equal to the applied voltage
divided by the insulation resistance. Leakage current is the
main measured value for AC hipot and DC hipot.
A line leakage current test which measures the current that
would flow from, to or between applied parts such as
sensor and patient leads. This test is the most complicated
and time consuming line leakage test.
The leakage current from all earthed parts of the product.
The current flowing from the mains supply through or
across insulation into the protective earth (PE) conductor.
Leakage from the enclosure or other parts, excluding
applied parts that are not connected to a protective earth
(PE) conductor. Also known as "Touch Chassis" Leakage
The current flowing from every individual part of the
applied part back to earth or the current flowing from an
unintended appearance of a voltage on the patient back to a
F-Type Applied Part.
Current flowing between patient connections and that is not
intended to be there to produce an effect in the patient.
The high limit is the upper value for a test to be considered
a pass. If the measured value is higher than the high limit
the test is considered a fail. In hipot, leakage current and
ground bond modes a high limit is required.
The low limit is the lower value for a test to be considered
a pass. If the measured value is lower than the low limit
the test is considered a fail. This limit is typically used for
AC hipot to ensure the DUT is connected. In insulation
resistance mode a low limit is required.
150799 Rev A3 Page 31 of 177