GE Logiq P5 Service Manual

							GE HEALTHCARE
DIRECTION 5394141, REVISION  1LOGIQ™ P5 SERVICE MANUAL 
Section 10-6 - Electrical Safety Tests 10 - 23
10-6-8-1 Data Sheet for ECG Leakage Current The test passes when all readings measure less th an 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 Test 115V
10uA10uA
220/240V 500uA10uA
Table 10-21   Maximum Allowance Limit for ECG Leakage Current
AC Power 
SourceMaximum
Allowance Limit
Patient Lead Isolation Current Test 115V
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 HEALTHCARE
DIRECTION 5394141, REVISION  1LOGIQ™ P5 SERVICE MANUAL  
10 - 24 Section 10-6 - Electrical Safety Tests
10-6-9 Probe Leakage Current Test
10-6-9-1 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.
10-6-9-2 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 combi nation, 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 resu lt from differences in 
line voltage and test lead placement.
10-6-9-3 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% sa lt 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™ P5 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 t he 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
OUTLET
H   (BLACK)
POLARITY REVERSING SWITCH
MOMENTARY
SWITCH
N   (WHITE)
G   (GREEN)LEAKAGE TEST
METER
CONSOLE
PROBE 
						

							GE HEALTHCARE
DIRECTION 5394141, REVISION  1LOGIQ™ P5 SERVICE MANUAL 
Section 10-6 - Electrical Safety Tests 10 - 25
10-6-9-3Meter 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 par t; turn it OFF for the second half.
9.) Depress the ISO TEST rocker switch and record the highest current reading.
10.) Follow the test co nditions 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 HEALTHCARE
DIRECTION 5394141, REVISION  1LOGIQ™ P5 SERVICE MANUAL  
10 - 26 Section 10-6 - Electrical Safety Tests
10-6-9-4 No Meter Probe Adapter Procedure
Follow these steps to test each transducer for leakage current.
1.) Turn the LOGIQ™ P5 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 par t; turn it OFF for the second half.
8.) Depress the ISO TEST rocker switch and record the highest current reading.
9.) Follow the test co nditions 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 
						

							GE HEALTHCARE
DIRECTION 5394141, REVISION  1LOGIQ™ P5 SERVICE MANUAL 
Section 10-6 - Electrical Safety Tests 10 - 27
10-6-9-5 Data Sheet for Transducer Source Leakage Current The test passes when all readings measure less than the values shown in Table 10-15  and Table 10-
16 . Record all data on the PM Inspection Certificate.
. 
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
Table 10-23 Typical Data Sheet For Transducer Source Leakage Current
Transducer Tested:
 Unit Power
Tester Power Polarity  SwitchTester GROUND or NEUTRAL Switch
Measurement
ON NORM OPEN
ON NORM CLOSED
ON REV OPEN
ONREVCLOSED
OFFNORMOPEN
OFFNORMCLOSED
OFFREV OPEN
OFF REV CLOSED 
						

							GE HEALTHCARE
DIRECTION 5394141, REVISION  1LOGIQ™ P5 SERVICE MANUAL  
10 - 28 Section 10-6 - Electrical Safety Tests
Section 10-7
When Theres Too Much Leakage Current...
CHASSIS FAILS
Check the ground on the power cord and plug for cont inuity. Ensure the ground is not broken, frayed, 
or intermittent. Replac e any defective part.
Tighten all grounds. Ensure star  washers are under all ground studs.
Inspect wiring for bad crimps, poor connections, or damage.
Test the wall outlet; verify it is grounded and is free of other wiring abnormalities. Notify the user or 
owner to correct any deviations. As a work around, ch eck the other outlets to see if they could be used 
instead.
NOTE: No outlet tester can detect the condition w here the white neutral wire and the green grounding 
wire are reversed. If later tests indicate high leakage currents, this should be suspected as a 
possible cause and the outlet wiring should be visually inspected.
PROBE FAILS
Test the probe in another connector to isolate if the fault lies with the probe or the scanner.
NOTE: Each probe will have some am ount of leakage, dependent on its design.  Small variations in 
probe leakage currents are normal from probe to probe. Othe r variations will result from 
differences in line voltage and test lead placement. The maximum allowable leakage current for 
body surface contact probe differs from inter-cavity probe. Be sure to enter the correct probe 
type in the appropriate space on the check list.
If excessive leakage current is slot dependent,  inspect the system connector for bent pins, poor 
connections, and ground continuity.
If the problem remains with the probe, replace the probe.
PERIPHERAL FAILS
Tighten all grounds. Ensure star  washers are under all ground studs.
Inspect wiring for bad crimps, poor connections, or damage.
STILL FAILS
If all else fails, begin isolation by removing the pr obes, external peripherals, then the on board ones, 
one at a time while monitoring the leakage current measurement.
NEW UNIT
If the leakage current measurement tests fail on a new  unit and if situation can not be corrected, submit 
a Safety Failure Report to  document the system problem. Remove unit from operation.
ECG FAILS
Inspect cables for damage or poor connections. 
						

							GE HEALTHCARE
DIRECTION 5394141, REVISION  1LOGIQ™ P5 SERVICE MANUAL 
Section 10-6 - Electrical Safety Tests 10 - 29
ULTRASOUND INSPECTION CERTIFICATE  
* Scan Format: Phased Array, Linear Array,  Curved Array, Mechanical Array or Other
FUNCTIONAL CHECKSPHYSICAL INSPECTION AND CLEANING 
COMMENTS: 
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
Customer Name: System ID:Dispatch Number / Date Performed: Warranty/Contract/HBS
System Type Model Number:Serial Number:Manufacture Date:
Probe 1: Frequency: Scan Format*: Model Number:Serial Number:
Probe 2: Frequency: Scan Format*: Model Number:Serial Number:
Probe 3: Frequency: Scan Format*: Model Number:Serial Number:
Probe 4: Frequency: Scan Format*: Model Number:Serial Number:
Probe 5: Frequency: Scan Format*: Model Number:Serial Number:
Probe 6: Frequency: Scan Format*: Model Number:Serial Number:
Probe 7: Frequency: Scan Format*: Model Number:Serial Number:
Probe 8: Frequency: Scan Format*: Model Number:Serial Number:
Probe 9: Frequency: Scan Format*: Model Number:Serial Number:
Functional Check (if applicable) OK? or 
N/A Physical Inspection and Cleaning 
(if applicable) Inspect Clean
B-Mode Function Console
Doppler Modes Function Monitor
CF-Mode Function Touch Panel
M-Mode Function Air Filter
Applicable Software Options Probe Holders
Applicable Hardware Options External I/O
Control Panel Wheels, Brakes & Swivel Locks
Monitor Cables and Connectors
Touch Panel GE Approved Peripherals (VCR, CD-RW, MOD, 
Printers)
Measurement Accuracy
GE Approved Peripherals 
						

							GE HEALTHCARE
DIRECTION 5394141, REVISION  1LOGIQ™ P5 SERVICE MANUAL  
10 - 30 Section 10-6 - Electrical Safety Tests
ELECTRICAL SAFETY
Final Check. All system covers are in plac e. System scans with all probes as expected.
Accepted by: ______________________________________________________________________
Electrical Test Performed Max Value 
Allowed Value 
Measured OK? Comments
Outlet (correct ground &wiring config.)
System Ground Continuity
Chassis Source Leakage Current - Probe
Chassis Source Leakage Current - Caster
Chassis Source Leakage Current - CRT
Patient Lead Source Leakage
(Lead to Ground)
Patient Lead Source Leakage
(Lead to Lead)
Patient Lead Source Leakage
(Isolation)
Peripheral 1 Leakage Current
Peripheral 1Ground Continuity
Peripheral 2 Leakage Current
Peripheral 2Ground Continuity
Peripheral 3 Leakage Current
Peripheral 3Ground Continuity
PROBES
Probe Number 
(from previous page) Max Value 
Allowed Max Value 
Measured OK? Comments
Probe 1:
Probe 2:
Probe 3:
Probe 4:
Probe 5:
Probe 6:
Probe 7:
Probe 8:
Probe 9: 
						

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GE Medical Systems, a General Electric Comp any, going to market as GE Healthcare.
3200 N. Grandview Boulevard
Waukesha, Wisconsin  53149
USA
www.gehealthcare.com