Spacelabs Healthcare elance 5, Service Manual

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Maintenance
Table 2: Enclosure Leakage Test Conditions and Limits
Neutral
Condition
Ground
Condition
Polarity International
Limit
U.S.
Limit
Closed neutral Closed ground Normal polarity 100
µ
A 300
µ
A
Open neutral Open ground Normal polarity 500
µ
A 300
µ
A
Closed neutral Open ground Normal polarity 500
µ
A 300
µ
A
Patient Lead Leakage Current Tests (Patient Modules)
Before you can perform the Patient Lead Leakage Current Test, verify that the monitor
passes the ground resistance and chassis current leakage tests. It is recommended that the
equipment be operating for 30 minutes prior to the test to allow thermal stabilization.
1 Patient Leads Current Leakage — measure the leakage current between each of the
patient lead wires and the ground lug on the monitor back panel. Also, measure the
leakage current between all combinations of ECG leads and ground. The current
must be less than 10 uA with the ground connected, and 50 uA with the ground open.
2 Leakage Current to Ground with 50/60 Hz — AC mains voltage applied to leads.
Apply AC mains voltage and measure the leakage current between each of the ECG
lead wires and the ground. The current must be less than 50 uA at any line voltage.
Preventive Maintenance
A Spacelabs Healthcare Field Service Engineer or qualified hospital biomedical technician should
check the monitor and optional equipment for acceptable performance and electrical
safety to
ensure they operate according to current requirements.
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