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M2540-92000-01 A M2540 Ultrasound System Field Service Manual Page 97
Performance Tests: Electrical Safety Tests
Figure 6-4 ECG Lead Isolation Leakage Current Test Diagram
WARNING
This test is hazardous. It applies line voltage to the ECG leads. Avoid accidental contact with the
line voltage. Do not touch the chassis or the ECG cable while performing the test. Keep the
ECG cable at least 20 cm from any grounded or conductive surfaces.
NOTE During the isolation test, select only normal polarity. Do not impose open ground or
open neutral conditions.
➤ ECG Lead Isolation Leakage Current Test Procedure
1. Set the analyzer’s mode to test ECG isolation.
2. Plug the analyzer into an available AC wall outlet. Plug the ultrasound system power plug into
the test receptacle on the analyzer.
3. Power up the ultrasound system by starting its internal PC.
UL, IEC, and CSA:
I
= 50 microamperes RMS
Mains
Voltage
LIMITS:
System
under
test
Ground wire
Green or
Green/Yellow
Powered on
Hot -
Neutral -
ECG patient
cable
1011E29
Power cord connected to AC power.
AC microammeter
I
(current)