Care and Maintenance
4-14 Ultrasound System – Common Service Information
Direction 5444964-100 English
 Rev. 5
Electrical safety tests
Content in this section
The following topics and measurements are covered in this 
section:
• ‘Uninterrupted Power Supply (UPS)’ on page 4-15
•  ‘Safety test overview’ on page 4-16
•  ‘Leakage current limits’ on page 4-19
•  ‘Outlet test - wiring arrangement - USA and Canada’ on 
page 4-23
•  ‘Grounding continuity’ on page 4-24
•  ‘Chassis leakage current test’ on page 4-25
•  ‘Isolated patient lead (source) leakage–lead to ground’ on 
page 4-29
•  ‘Isolated patient lead (source) leakage–lead to lead’ on 
page 4-31
•  ‘Isolated patient lead (sink) leakage-isolation test’ on 
page 4-33
•  ‘Probe (Source) leakage current test’ on page 4-35
•  ‘Isolated Probe (Sink) Leakage-Isolation Test’ on page 4-40