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. 
Measurements should be made with the unit On and Off, with the power line polarity Normal and 
Reversed. Record the highest reading.
.
10-7-5-2 Generic Procedure
The test verifies the isolation of the power line from the chassis. The testing meter is connected from 
accessible metal parts of the case to ground. Measurements should be made with the unit ON and OFF, 
with the power line polarity Normal and Reversed. Record the highest reading of current.
When using the Microguard or a similar test instrument, its power plug may be inserted into the wall 
outlet and the equipment under test is plugged into the receptacle on the panel of the meter. This places 
the meter in the grounding conductor and the current flowing from the case to ground will be indicated 
in any of the current ranges. The maximum allowable limit for chassis source leakage is shown in 
Table 10-14.
CAUTIONElectric Shock Hazard. When the meters ground switch is OPEN, dont touch the unit!
CAUTIONEquipment damage possibility. Never switch the Polarity and the status of Neutral when the unit 
is powered ON. Be sure to turn the unit power OFF before switching them using the POLARITY 
switch and/or the NEUTRAL switch. Otherwise, the unit may be damaged.
Figure 10-5   Set Up for Chassis Source Leakage Current, 
IEC 601-1 Clause 19 - Continuos Leakage Currents and 
Patient, Auxiliary Currents 
						

							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 highest leakage current measured.
Follow these steps to test the unit for leakage current.
1.) Turn the LOGIQ™ 9 unit OFF.
2.) Plug the unit into the meter, and the meter into the tested AC wall outlet
3.) Plug the black chassis cable into the meters “CHASSIS” connector and attach the black chassis 
cable clamp to an exposed metal part of the LOGIQ™ 9.
4.) Set the testers “FUNCTION” switch to CHASSIS position.
5.) Follow the test conditions described for respective test points shown in Table 10-17. 
6.) Keep a record of the results with other hard copies of PM data kept on site.Figure 10-6   Ground and Chassis Leakage Current Test
Table 10-17 Chassis Leakage Current Test Condition
TESTCONDITION
1
Mounting screw for probe receptacle
2
caster support
3
Mounting screw for CRT housing
4Mounting screw for peripheral plugged into unit
5Mounting screw for other peripheral powered by unit
Chassis
Cable
Clamp Normal
Reverse
Polarity
Neutral
Open/Closed Functions
Selector Outlet Test
Lamps 
						

							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 
meter simulates a patient who is connected to the monitoring equipment and is grounded by touching 
some other grounded surface. Measurements should be made with the ground open and closed, with 
power line polarity normal and reversed, and with the ultrasound console Off and On. For each 
combination the operating controls, such as the lead switch, should be operated to find the worst case 
condition. Table 10-18 Typical Data Sheet for Chassis Source Leakage Current
Unit Power
Tester Polarity 
Switch
Tester Neutral 
or Ground 
SwitchTest 1 
Probe 
Connector
Test 2 
casterTest 3 
CRTOptional 
Test 4 Optional 
Test 5
Enter Name of tested peripheral here:
ON NORM OPEN
ON NORM CLOSED
ONREVOPEN
ONREVCLOSED
OFFNORMOPEN
OFF NORM CLOSED
OFF REV OPEN
OFF REV CLOSED
CAUTIONEquipment damage possibility. Never switch the Polarity when the unit is powered ON. Be sure 
to turn the unit power OFF before switching the polarity using the POLARITY switch. Otherwise, 
the unit may be damaged. 
						

							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 ECG buttons for testing patient leads. Snap on all patient leads 
to the meter and assure that the ground clip is connected to the system’s ground terminal. Select the 
meter’s LEAD-GND function. Select and test each ECG lead positions (except “ALL”) of the LEAD 
selector, testing each to the power condition combinations found in “PATIENT LEAD LEAKAGE” table 
in the “PM CHECKLIST”. Record the highest leakage current measured for each Power selection.
Follow these steps to test the ECG module for leakage current.
1.) Turn the LOGIQ™ 9 unit OFF.
2.) Plug the unit into the meter, and the meter into the tested AC wall outlet.
3.) Plug the black chassis cable into the meters “CHASSIS” connector and attach the black chassis 
cable clamp to an exposed metal part of the LOGIQ™ 9 unit.
4.) Connect the patient leads to the corresponding snaps located at the upper front of the Dale 600/
600E. Lead nomenclature for this test is not important.Figure 10-7   Test Circuit for Measuring Non-Isolated 
Patient Leads
CAUTIONLine voltage is applied to the ECG leads during this test. To avoid possible electric shock 
hazard, the system being tested must not be touched by patients, users or anyone while the ISO 
TEST switch is depressed. When the meters ground switch is OPEN, dont touch the unit!
POWER
OUTLET
H   (Black)
N   (White)
G   (Green)Internal
circuitry
Insulating surface
Polarity reversing switch
(use both positions) Appliance power switch
(use both off and on positions)
Patient connected leads The connection is at service entrance
or on the supply side of a separately
derived system
Building
ground
Grounding contact switch (use in both
open and closed positions)Current meter
H = Hot
N = Neutral (grounded)
G = Grounding conductor H 
N
G
Patient lead selector switch (if any)
(activated as required)
Appliance
Between each patient 
lead and ground 
						

							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
ECG PowerMeter’s Polarity SwitchMeter’s Neutral Switch
ON NORM CLOSED
ON NORM OPEN
ON REVERSE CLOSED
ONREVERSEOPEN
OFFNORMCLOSED
OFFNORMOPEN
OFF REVERSE CLOSED
OFF REVERSE OPEN
ECG
Patient
Cable
ISO
Rocker
Switch
ECG
Lead
Selector 
						

							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.
10.) Record the lead to lead leakage current measured on the data sheet.
11.) Set the meters “FUNCTION” switch to LEAD ISO position to measure the patient lead isolation 
current.
12.) Select and test each ECG lead positions (except ALL) of the LEAD selector, testing each to the 
power condition combinations.
13.) Depress the rocker switch to ISO TEST and read the isolation current. To apply the voltage to the 
lead safely, the voltage is only applied when the rocker switch is depressed to ISO TEST.
14.) Record the patient lead isolation current measured on the data sheet.
10-7-7 Isolated Patient Lead (Source) Leakage–Lead to Lead
Reference the procedure in the IEC 60601-1. When using the Dale 600, switch the meter’s function 
selector to the LEAD-LEAD position. Select and test each of the five ECG lead positions (except ALL) 
on the LEAD selector, testing each to the power condition combinations found in the table. Record the 
highest leakage current measured.
10-7-7-1 Dale 600 Patient Lead Tests
NEUTRAL POLARITY
1.) Closed Normal
2.) Open Normal
3.) Closed Reversed
4.) Open Reversed
10-7-8 Isolated Patient Lead (Sink) Leakage-Isolation Test
Reference the procedure in the IEC 60601-1. When using the Dale 600, switch the meter’s function 
selector to the LEAD-ISO. Select the ALL position on the lead selector. Depress the rocker switch to 
ISO TEST to test lead isolation.
NOTE: It is not necessary to test each lead individually or power condition combinations as required in 
previous tests.
CAUTIONLine voltage is applied to the ECG leads during this test. To avoid possible electric shock 
hazard, the system being tested must not be touched by patients, users or anyone while the ISO 
TEST switch is depressed. 
						

							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 Lead to Lead Leakage Current Test115V 10uA 10uA
220/240V 500uA 10uA
Table 10-21   Maximum Allowance Limit for ECG Leakage Current
AC Power 
SourceMaximum
Allowance Limit
Patient Lead Isolation Current Test115V 20uA
220/240V 5mA
Table 10-22 Typical Data Sheet for ECG Leakage Current
ECG 
Power
Tester 
Polarity 
SwitchTester 
Ground 
SwitchTester Lead Selector
RLRALALLC
ON NORM CLOSED
ON REVERSE CLOSED
ON NORM OPEN
ONREVERSEOPEN
OFFNORMCLOSED
OFFREVERSECLOSED
OFF NORM OPEN
OFF REVERSE OPEN 
						

							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 
reversed, and with the unit Off and On. For each combination, the probe must be active to find the worst 
case condition.
NOTE: Each probe will have some amount of leakage current, dependent on its design. Small variations in 
probe leakage currents are normal from probe to probe. Other variations will result from differences in 
line voltage and test lead placement.
10-7-9-3 Meter Procedure Using Probe Adapter
The Dale 600/600E provides a method for testing probes independently from the system. The meter 
utilizes a probe adapter to apply a test potential commonly to all connector pins.
The probes imaging area is immersed in a saline solution along with a grounding probe from the 
meter to complete the current path. Saline solution is a mixture of water and salt. The salt adds a free 
ion to the water, making it conductive. Normal saline solution is 0.9% salt or 1/2 gram salt per 1 liter of 
water. If saline is not available, a mixture of 1 quart water with one or more grams of table salt, mixed 
thoroughly, will substitute.
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.) Connect the probe for test with the meters appropriate adapter.
4.) Plug the saline probe into the meters “CHASSIS” connector.
5.) Plug the probe adapter into the meters connector marked “EXTERNAL”.Figure 10-9   Set Up for Probe Leakage Current
CAUTIONTo avoid probe damage and possible electric shock, do not immerse probes into any liquid 
beyond the level indicated in the probe users manual. Do not touch the probe, conductive liquid 
or any part of the unit under test while the ISO TEST switch is depressed.
POWER
OUTLETH   (BLACK)POLARITY REVERSING SWITCH
MOMENTARY
SWITCH N   (WHITE)
G   (GREEN)LEAKAGE TEST
METER
CONSOLE
PROBE 
						

							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 conditions described in Table 10-23 for every transducer.
11.) Keep a record of the results with other hand copies of PM data.Figure 10-10   Transducer Source Leakage Current 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.) Connect the probe for test with the connector of the console.
6.) Add the saline probe and the imaging area of the probe into the saline bath.
7.) Have unit power ON for the first part; turn it OFF for the second half.
8.) Depress the ISO TEST rocker switch and record the highest current reading.
9.) Follow the test conditions described in Table 10-23 for every transducer.
10.) Keep a record of the results with other hand copies of PM data.Figure 10-11   Check Without Probe Adapter