GE Logiq 9 Service Manual

GE MEDICAL SYSTEMS PROPRIETARY TO GE
D
IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL 
Chapter 10 Periodic Maintenance 10-17
10-7-5 Chassis Leakage Current Test
10-7-5-1 Definition
This test measures the current that would flow in a grounded person who touched accessible metal 
parts of the bedside station if the ground wire should break. The test verifies the isolation of the power 
line from the chassis. The meter is connected from accessible metal parts of the case to ground....

GE MEDICAL SYSTEMSPROPRIETARY TO GE
D
IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL   
10-18 Section 10-7 - Electrical Safety Tests
10-7-5-3 Dale 600 Meter Procedure
When measuring system chassis currents with the Dale 600, always use the CHASSIS selection of the 
external/chassis function switch. This requires the ground clip lead and changing the meters switches 
in accordance with the IEC 601-1.1. Refer to the Dale 600 Instruction Manual for meter self-test and 
operation. Record the...

GE MEDICAL SYSTEMS PROPRIETARY TO GE
D
IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL 
Chapter 10 Periodic Maintenance 10-19
10-7-5-4 Data Sheet for Chassis Source Leakage Current
The test passes when all readings measure less than the value shown in Table 10-14. Record all data 
on the PM Inspection Certificate.
10-7-6Isolated Patient Lead (Source) Leakage–Lead to Ground
10-7-6-1 Definition
This test measures the current which would flow to ground from any of the isolated ECG leads. The...

GE MEDICAL SYSTEMSPROPRIETARY TO GE
D
IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL   
10-20 Section 10-7 - Electrical Safety Tests
10-7-6-2 Generic Procedure
Measurements should be made with the ground open and closed, with power line polarity normal and 
reversed, and with the unit Off and On. For each combination, the operating controls such as the lead 
switch should be operated to find the worst case condition.
 
10-7-6-3 Dale 600 Meter Procedure
The Dale 600 provides five snap type...

GE MEDICAL SYSTEMS PROPRIETARY TO GE
D
IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL 
Chapter 10 Periodic Maintenance 10-21
10-7-6-3Dale 600 Meter Procedure (cont’d)
5.) Set the meters “FUNCTION” switch to LEAD TO GROUND position to measure the patient lead to 
ground leakage current.
6.) Select and test each ECG lead positions (except ALL) of the LEAD selector, testing each to the 
power condition combinations.Figure 10-8   ECG Leakage Current Test
Table 10-19  Testing Power Conditions...

GE MEDICAL SYSTEMSPROPRIETARY TO GE
D
IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL   
10-22 Section 10-7 - Electrical Safety Tests
10-7-6-3Dale 600 Meter Procedure (cont’d)
7.) Record the patient lead to ground leakage current measured on the data sheet.
8.) Set the meters “FUNCTION” switch to LEAD TO LEAD position to measure the lead to lead leakage 
current.
9.) Select and test each ECG lead positions (except ALL) of the LEAD selector, testing each to the 
power condition combinations....

GE MEDICAL SYSTEMS PROPRIETARY TO GE
D
IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL 
Chapter 10 Periodic Maintenance 10-23
10-7-8-1 Data Sheet for ECG Leakage Current
The test passes when all readings measure less than the value shown in the table below. Record all 
data on the PM Inspection Certificate.
Table 10-20 Maximum Allowance Limit for ECG Leakage Current
AC Power 
Source
Maximum
Allowance Limit
GROUND OPEN
GROUND 
CLOSED
Patient Lead to Ground Leakage Current Test
and
Patient...

GE MEDICAL SYSTEMSPROPRIETARY TO GE
D
IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL   
10-24 Section 10-7 - Electrical Safety Tests
10-7-9 Probe Leakage Current Test
10-7-9-1 Definition
This test measures the current that would flow to ground from any of the probes through a patient who 
is being scanned and becomes grounded by touching some other grounded surface.
10-7-9-2 Generic Procedure
Measurements should be made with the ground open and closed, with power line polarity normal and...

GE MEDICAL SYSTEMS PROPRIETARY TO GE
D
IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL 
Chapter 10 Periodic Maintenance 10-25
10-7-9-3Meter Procedure Using Probe Adapter (cont’d)
6.) Set the meters “FUNCTION” switch to EXTERNAL position.
7.) Add the saline probe and the imaging area of the probe into the saline bath.
8.) Have unit power ON for the first part; turn it OFF for the second half.
9.) Depress the ISO TEST rocker switch and record the highest current reading.
10.) Follow the test...

GE MEDICAL SYSTEMSPROPRIETARY TO GE
D
IRECTION 2294854-100, REVISION 3  LOGIQ™ 9 PROPRIETARYMANUAL   
10-26 Section 10-7 - Electrical Safety Tests
10-7-9-4 No Meter Probe Adapter Procedure
Follow these steps to test each transducer for leakage current.
1.) Turn the LOGIQ™ 9 unit OFF.
2.) Plug the unit into the test meter, and the meter into the tested AC wall outlet.
3.) Plug the external probe into the meters (Dale 600) “EXTERNAL” connector.
4.) Set the meters “FUNCTION” switch to EXTERNAL position.
5.)...