
Maintenance: Electrical Safety Tests
Revision A
DASH 2000 Patient Monitor
3-19
2000 412-001
Wall Receptacle Test
Before starting the tests, the wall receptacle from which the monitoring
device will get electrical power must be checked. This test checks the
condition of the wall receptacle to ensure correct results from leakage
tests.
For international wall receptacles, refer to the internal standards
agencies of that particular country. Use a digital multimeter to ensure
the wall receptacle is wired properly.
If other than normal polarity and ground is indicated, corrective action
must be taken before proceeding. The results of the following tests will be
meaningless unless a properly wired wall receptacle is used.
Ground (Earth)
Integrity
Listed below are two methods for checking the ground (earth) integrity,
ÒGround Continuity TestÓ and ÒImpedance of Protective Earth
Connection.Ó These tests determine whether the device's exposed metal
and power inlet's earth (ground) connection has a power ground fault
condition.
Perform the test method below that is required by your Country/Local
governing safety organization.
Ground Continuity Test
Completion of this test is checked by the following steps:
1.
Disconnect the DUT (device under test) from the wall receptacle.
2.
Connect the negative(-) lead of the ohm meter to the protective earth
terminal (ground pin in power in-let connector) or the protective
earth pin in the MAINS PLUG (ground pin in power cord). Refer to
the US 120Vac power cord figure on the left.
3.
Set the Ohm meter to the milliohm (m
Ω
) range.
4.
Connect the positive (+) lead of the Ohm meter to all exposed metal
surfaces on the DUT. If the metal surfaces are anodized or painted
scrape off a small area in a inconspicuous area for the probe to make
contact with the metal.
5.
Resistance should read to pass:
¥
0.1 ohm or less without power cord
¥
0.2 ohms or less with power cord
Impedance of Protective
Earth Connection
This test unlike a ground continuity test will also stress the ground
system by using special ground bond testers i.e. Kikusui (model 872 or
TOS 6100) or Associated Research model HYAMP¨ Jr. Model 3030D.
This test normally is only required as a manufacturing production test to
receive safety agency compliance (i.e. IEC601-1).
Some country agency's do require this test after field equipment repairs
(i.e. Germany's DIN VDE 0751 standards).
Ground
Pin
Содержание marquette Dash 2000
Страница 12: ...Contents viii DASH 2000 Patient Monitor Revision A 2000 412 001 ...
Страница 82: ...Maintenance Repair Log 3 36 DASH 2000 Patient Monitor Revision A 2000 412 001 ...
Страница 156: ...UPPER LEVEL ASSEMBLY Spare Parts List 7 10 DASH 2000 Patient Monitor Revision A 2000 412 001 ...
Страница 157: ...Revision A DASH 2000 Patient Monitor 8 1 2000 412 001 8 ASSEMBLY DRAWINGS Contents ...
Страница 159: ......
Страница 173: ......
Страница 178: ......
Страница 180: ......
Страница 181: ......
Страница 182: ......
Страница 184: ......
Страница 196: ......
Страница 197: ......
Страница 198: ......
Страница 200: ......
Страница 201: ......