Philips M2540 Figure 4-4 Transducer Leakage Current Test Setup and Theory Diagram, , See Key fo r Figure 4-4

M2540-92000-01 A M2540 Ultrasound System Field Service Manual Page 53
Theory of Operation: Transducer Safety Testing: Test Setup and Theory
Figure 4-4 Transducer Leakage Current Test Setup and Theory Diagram
A
I
SAFETY ANALYZER
Insertion
Outer Grounded
7ASW030-1
Hot
Neutral
Ground
I
C
I
Ultrasound
metal chassis
plastic shielding
jacket
I
Saline ECG
lead wire
Z
depth
measured
system
chassis
transducer
Closed for normal condition
Closed for 1st single fault condition
Open for 2nd single fault condition
Open Neutral button
Open Ground button
S
Neutral condition: Closed for normal condition
Open for 1st single fault condition
Closed for 2nd single fault condition
Ground condition:
ECG for transducer leakage test
Case Leakage, Ground Conductor for ground wire leakage test
Mode selector on safety analyzer:
2
1
skin
Internal
circuitry
Transducer Cable
See Key fo r
Figure 4-4