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M2540-92000-01 A M2540 Ultrasound System Field Service Manual Page 56
Theory of Operation: Transducer Safety Testing: Test Setup and Theory
Figure 4-6 Transducer Leakage Current Test Diagram for 1st Single Fault Condition
When an open ground condition is imposed, all I
chassis
is forced through the transducer. This
I
transducer
is still fairly low unless its sheath is compromised.
Figure 4-7 Transducer Leakage Current Test Diagram for 2nd Single Fault Condition
A
I
7ASW030-3
Hot
Neutral
Ground
I
C
I
I
measured
system
chassis
transducer
S
Z
A
I
7ASW030-4
Hot
Neutral
Ground
I
C
I
I
measured
system
chassis
transducer
S
Z