4535 612 10261 HD11 Service Manual Page 143
CSIP Level 1 Performance Tests: Electrical Safety Tests
Electrical
Safety Tests
The tests described on the following pages are part of a comprehensive preventive maintenance
program. They detect abnormalities that could prove dangerous to patient or operator.
• The system power supply is a self-contained unit that is safety-tested by its manufacturer. No
further safety testing is needed when the power supply is installed or replaced.
• After any service or maintenance, perform the required tests to assure that system safety
and functions are not compromised.
• Inspect power cords frequently, especially at their ends.
This section describes the following safety tests:
• The Chassis to Ground Resistance test checks the entire system for electrical resistance
between the chassis and ground. See “Chassis to Ground Resistance Test” on page 144.
• The Ground Wire Leakage Current test checks the entire system for leakage on ground
leads. See “Ground Wire Leakage Current Test” on page 146.
• The ECG Lead Leakage Current test checks ECG leads connected to the optional Physio
module for electrical leakage. See “ECG Lead Leakage Current Test (Source)” on page 148.
• The ECG Lead Isolation Leakage test checks ECG leads by applying voltage from the mains to
the leads, to assure that the system is isolated from such voltages. See “ECG Lead Isolation
Leakage Current Test” on page 150.
• The Transducer Leakage Current test checks a transducer for electrical leakage while it is
connected to the ultrasound system. The system sends normal operating voltages to the
transducer, which is tested for leakage. See “To test transducer leakage current” on
page 154.
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