Checking Chassis Leakage Current; To Perform The Test - HP M2350A Service Manual

Checking Patient Safety
Checking Chassis Leakage Current
Checking Chassis Leakage Current
This test checks chassis-to-ground leakage current. A very high leakage current may indicate
line filter or transformer failure. Replace any component in the HP Component Central Monitor
that causes a test failure. Refer to Figure 11-6.
Note
Leakage current limits specified in this test applies to each power cord included
liil
in an installation.
To Perform the Test
1. Place HP Component Central Monitor under test on a non-conductive surface.
2. Disconnect power cord of HP Component Central Monitor from the wall outlet and plug it
into the TEST RECEPTACLE on top of the Dempsey Safety Analyzer.
3. Set the analyzer FUNCTION switch to INTERNAL CURRENT position and SELECTOR switch
to TEST I position.
4. Using a clip lead, connect the HP Component Central Monitor chassis ground to analyzer
terminal labeled CASE.
5. Use the OPEN GROUND and/or REVERSE POLARITY buttons on the analyzer, to obtain
following test conditions Read leakage current on analyzer meter and record readings:
Chassis
grounded;
standard polarity, power ON.
Chassis grounded, standard polarity, power OFF
Chassis grounded,
reverse
polarity, power ON.
Chassis grounded, reverse polarity, power OFF.
l@st Limit: Less than or equal to 10 microamperes
Chassis
ungrounded,
standard polarity, power ON.
Chassis ungrounded, standard polarity, power OFF.
Chassis ungrounded,
reverse
polarity, power ON.
Chassis ungrounded, reverse polarity, power OFF.
lkst Limit: Less than or equal to 100 microamperes.
11-9