Testing Intraoperative Transducer Leakage Current (Source)
This test checks leakage current without mains voltage applied. For a diagram
of this test, Test 1, see "Leakage Current Testing for Intraoperative Transducers"
on page 217.
WARNING
Electrical shock hazard: Do not touch the lead that you connect to the safety
analyzer in step 7.
1. Plug the safety analyzer into the power source.
2. Plug the ultrasound system into the safety analyzer.
3. Connect the transducer being tested to the ultrasound system.
4. Immerse 5 cm (2 in) of the transducer in saline solution.
5. Set the safety analyzer Mode switch to the ECG position.
6. Set the safety analyzer Leads switch to the ALL (all ECG leads) position.
7. Connect a lead to any ECG terminal on the safety analyzer, and immerse the
other end into the saline solution.
8. Set the safety analyzer Line Polarity switch to Normal.
9. Note the normal condition leakage reading.
10. Hold the safety analyzer Ground Open switch in the Open position (single
fault condition), and note the leakage reading.
11. Repeat step 9 and step 10 with the Polarity switch in the Reverse position.
These are the applicable limits:
• 10 µA RMS (normal condition)
• 50 µA RMS (single fault condition)
Testing Intraoperative Transducer Leakage Current (Sink)
WARNING
There is considerable hazard in performing this test. Use precautionary measures
to avoid accidental contact with line voltage. In addition, any time that the ground
iU22 User Manual
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Intraoperative Transducers
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