user manual

M2540-92000-01 A M2540 Ultrasound System Field Service Manual Page 103
Performance Tests: Electrical Safety Tests
Figure 6-6 Transducer Isolation Leakage Current Test Diagram
WARNING
This test is hazardous. It applies line voltage to the ECG and transducer cables. Avoid accidental
contact with the line voltage. Do not touch the chassis, or the ECG or transducer cables while
performing the test. Keep the ECG and transducer cables 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.
➤ Transducer Isolation Leakage Current Test Procedure
1. Set the analyzer to test ECG.
LIMITS:
UL, IEC, and CSA:
1101e30
Transducer
Powered on
System
under
test
Hot -
Neutral -
Ground wire
Green or
Green/Yellow
Power cord connected to AC power.
submerged in
saline
AC microammeter
I
(current)
I
= 500 microamperes
For
type transducers:
ECG
Mains
voltage
lead
wire
I
= 50 microamperes
For
type transducers: