5-34 MAC™ 3500 Resting ECG Analysis System Revision L
2021337-036
Maintenance: Writer Roller/Carriage Assembly Replacement
Leakage Tests
The leakage tests are safety tests to ensure that the equipment poses no electrical
health hazards. Use the table below to determine which tests apply to the unit under
test and the maximum allowable leakage currents. For international leakage limits,
refer to the internal standards agencies of that particular country.
If the unit under test fails the leakage tests, do not allow the customer to use the
equipment. C
all Tech Support for assistance. (See the “How to Reach Us” page in
the front of the manual.)
We recommend that you perform these tests:
Before applying power for the first time
Annually as part of routine maintenance
Whenever internal assemblies are serviced
NOTE
The accuracy of the leakage tests depe
nds on the properly-wired wall
outlet. Do not proceed until you verify the integrity of the power
source.
WARNING
Total system leakage must not exceed 300 microamperes (United
States) or 500 microamperes (international).
Table 2. Leakage Tests and Maximum Allowable Leakage Currents
Test
Maximum Current
1
(µA)
1. Per UL 60601-1 (United States) and IEC 60601-1 (International)
1.
Ground-wire-leakage-to-ground 300 (United States)
500 (international)
2.
Chassis-leakage-to-ground 100
3.
Patient-cable-leakage-to-ground 100
4.
Patient-cable-leakage-into-patient-leads-from-120 V ac 500
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