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M2540-92000-01 A M2540 Ultrasound System Field Service Manual Page 94
Performance Tests: Electrical Safety Tests
4. Take ground wire leakage current measurements in an open ground and open neutral
condition, with both normal and reverse polarity. Record the highest value, and compare it
to the limit specified for Single Fault condition in Figure 6-2 on page 93.
A reading higher than acceptable limits can indicate a problem with the power cord, with its
associated connections, or with the power transformer.
ECG Lead
Leakage
Current Test
(Source)
This test checks ECG leads connected to the optional Physio module for electrical leakage.
Figure 6-3 on page 95 shows the basic electrical concept of the ECG Lead Leakage Current test.
Use a safety analyzer and complete the procedure that follows the figure.
WARNING
This test can be hazardous. Avoid any contact with line voltage. Any time during the test that the
ground connection is open, do not touch the M2540A chassis or the patient cable.