GE LOGIC C2 Series Technical Publication page 120

Care and Maintenance
Mains on applied part
NOTE:
4-42
Mains Applied refers to the sink leakage test where mains
(supply) voltage is applied to the part to determine the amount of
current that will pass (or sink) to ground if a patient contacted
mains voltage.
Mains on applied part is one of the described leakage current
tests applicable for probes (Ref: IEC60601-1). This is to be
performed with the probe disconnected from the Ultrasound
system. Apply mains voltage over the insulation barrier.
(Between protective earth on the probe connector, and an
electrical anode in saline solution. The patient applied part of the
probe is immersed into the saline solution.) Measure current
flowing in the circuit = leakage current.
As a minimum, tests according to IEC60601-1 must be
performed once a year. The requirements for Body Floating (BF)
have to be applied for TEE and Trans thorax probes bearing the
symbol for safety class BF.
The symbol for BF is indicated on the probe connector label
below:
Figure 4-5. GE Probe Connector Label example
Ultrasound System
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Common Service Information
Direction 5444964-100 English Rev. 5