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4535 612 34161 HD3 Service Manual Page 132
CSIP Level 1 Performance Tests: Electrical Safety
Transducer Leakage Current Test (Source)
This test checks a transducer for electrical leakage while it is connected to the ultrasound sys-
tem. The system sends normal operating voltages to the transducer, and leakage is measured
using a safety analyzer. Figure 6-3 shows the basic electrical concept of the Transducer Leakage
Current test. Complete the procedure “To test transducer leakage current” on page 133.
Figure 6-3 Transducer Leakage Current Test Diagram
LIMITS: UL, IEC, and CSA:
7ASW027
Transducer
submerged in
saline
AC microammeter
I
(current)
500 microamperes Single Fault condition
I = 100 microamperes Normal condition,
For
type transducers:
ECG
Ground wire:
Hot -
Powered on
Neutral -
System
under
test
Power cord connected to AC power.
(open neutral)
(open ground)
Green or Green/Yellow
Ground wire closed for Normal condition,
Neutral wire open (ground closed) for second Single Fault condition
Ground wire open for first Single Fault condition,
lead
wire
50 microamperes Single Fault condition
I = 10 microamperes Normal condition,
For
type transducers: