Philips iE33 - Page 295

Electrical Safety Check for TEE Transducers
TEE Leakage Current Test
DefinitionSymbol
Stray capacitance from the ultrasound system power wiring to
the system grounded metal chassis (1 to 3 MΩ reactance)
C
Impedance between the metal parts of the TEE transducer and
a test electrode placed in the bucket of saline solution (about
850 kΩ with an intact outer insulating layer, 500 Ω with a hole
in the layer)
Z
Microammeter to measure third-wire current, either directly
from the chassis or through Z to the test electrode
A
Line power source, either 110 Vac or 220 Vace
Current caused by e and stray capacitance, and optionally ZI
Open earth lift ground switchS1
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iE33 User Manual
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Transesophageal Transducers