User's Manual

M2540-92000-01 A M2540 Ultrasound System Field Service Manual Page 93

Performance Tests: Electrical Safety Tests

Figure 6-2 Ground Wire Leakage Current Test Diagram

➤ Ground Wire Leakage Current Test Procedure

To test the system’s ground wiring for leakage:

1. Set the mode on the analyzer to detect leakage.

2. Plug the analyzer into an available wall outlet. Plug the ultrasound system power plug into the

test receptacle on the analyzer. Turn on the ultrasound system’s power by starting the

internal PC.

3. Take ground wire leakage current measurements in an open ground condition, with both

normal and reverse polarity. Record the highest value, and compare it to the limit specified

for Normal condition in Figure 6-2 on page 93.

Hot -

AC micro-

ammeter

Powered on

UL:

= 300 microamperes Normal condition,

CSA and IEC:

= 500 microamperes Normal condition,

Neutral -

LIMITS:

Ground wire

Green or

Green/Yellow

1000 microamperes Single Fault condition

7ASW025

System

under

test

Power cord connected to AC power.

(current)

(open neutral)

(open ground)

Ground wire open for Normal condition

Ground wire and neutral wire open

simultaneously for Single Fault condition