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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