4535 612 34161 HD3 Service Manual Page 136
CSIP Level 1 Performance Tests: Electrical Safety
Transducer Isolation Leakage Current Test Procedure
WARNING This test is hazardous. It applies line voltage to the ECG and transducer cables. Avoid accidental
contact with the line voltage. Do not touch the chassis or the ECG or transducer cables while
performing the test. Keep the ECG and transducer cables at least 20 cm (8 in) from any
grounded or conductive surfaces.
➤ To test transducer isolation leakage current
NOTE During this test, select only normal polarity. Do not impose open ground or open neu-
tral conditions.
1. Set the analyzer to test ECG.
2. Plug the analyzer into an available AC wall outlet. Plug the ultrasound system power plug into
the test receptacle on the analyzer.
3. Turn on the ultrasound system.
4. Plug the transducer to be tested into the ultrasound system.
5. Fill a test container with enough saline to completely cover the appropriate parts of the
transducer.
6. Insert the exposed end of the ECG lead wire into the saline, and then carefully insert the
transducer. For transthoracic and endocavity transducers, submerge the head and 5 cm (1.96
in) of the cable. Be careful not to submerge the connector.
7. Measure the isolation leakage current of the transducer. Record the value, and check that it
is within the limit specified in Figure 6-4.
