GE Logiq 7 Service Manual

							GE HEALTHCARE
DIRECTION 2286865, REVISION 14LOGIQ™ 7 SERVICE MANUAL
Section 10-7 - Electrical Safety Tests 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 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 2286865, REVISION 14LOGIQ™ 7 SERVICE MANUAL
10-24Section 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.
NOTE: Some leakage current is expected on each probe, depending 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. 
It is abnormal if no leakage current is measured. If no leakage current is detected, check the 
configuration of the test equipment.
10-7-9-2 Test Equipment
Table 10-23 Test Equipment kits (Chapter 10 LOGIQ™ 7 Proprietary Service Manual)
KitDescriptionContents
46-285652G1 Dale 601 - 
ULTRASOUND SAFETY  ANALYZER FIELD KIT -
for 120V unit • ELECTRICAL SAFETY ANALYZER, DALE, MODEL 601 for 120V unit
• Vendor MODEL 600/100 8FT CHASSIS GROUND CABLE
• Vendor MODEL 600/102 6FT SALINE BATH GROUND CABLE
• Vendor MODEL 600/202 ULTRASOUND PROBE ADAPTER 
• Vendor MODEL 600/600 SOFT CARRYING CASE
• Vendor MODEL 600/900 OPERATORS MANUAL 
• Vendor MODEL 600/901 LMINATED OPERATORS GUIDE 
46-328406G2 Dale 601E - 
ULTRASOUND SAFETY 
ANALYZER FIELD KIT -
for 220V unit • ELECTRICAL SAFETY ANALYZER, DALE, MODEL 601E for 220V unit
• Vendor MODEL 600/100 8FT CHASSIS GROUND CABLE
• Vendor MODEL 600/101 16FT CHASSIS GROUND CABLE 
• Vendor MODEL 600/103 8FT CHASSIS GROUND PROBE 
• Vendor MODEL 600/200 8FT EXTERNAL LEAKAGE GROUND CABLE 
• #20 WIRE W/MINIGATOR CLIPS, 2 Ft
• CARRYING CASE and foam padding
• Vendor MODEL 600/900 OPERATORS MANUAL
2113015 ULTRASOUND PROBE 
LEAKAGE ADAPTER KIT • LOGIQ FAMILY PROBE ADAPTER
• Vendor MODEL 600/202 ULTRASOUND PROBE ADAPTER 
• Vendor MODEL 600/203 RADIUS/SONOCHROME PROBE LEAKAGE 
CURRENT ADAPTER  
						

							GE HEALTHCARE
DIRECTION 2286865, REVISION 14LOGIQ™ 7 SERVICE MANUAL
Section 10-7 - Electrical Safety Tests 10-25
10-7-9-2 Test Equipment (cont’d)
. 
Table 10-24 Test Equipment and Accessory Description
Dale Part numberAccessory NamePictureDescription
Vendor MODEL 
600/100 
46-285647P2  CHASSIS CABLE
Black coil cord with extended length and black grips. Used on DALE601/601E to measure 
earth resistance and enclosure leakage current. Also used as 
reference lead for external  measurement. 
Vendor MODEL 600/102 
46-285647P4 CHASSIS GROUND PROBE
Black coil cord with needle probe for testing receptacles and for  tight spaces. Also referred to as “Saline Probe” or 
“Saline Bath Ground Cable”. 
Measures earth resistance and 
enclosure leakage current. Also used 
for grounding saline baths for isolation testing of probes. 
Used on DALE601/601E. This probe  may be substituted for the 600/100 
Chassis Cable, and used as a probe  instead of a clamp.
Vendor MODEL 600/200
46-285647P6 ISO/EXTERNAL LEAKAGE 
CABLE
Black coiled cord with red grips. Standard auxiliary cable for external 
measurements of leakage current 
and voltage gradient between two  surfaces.
Used on DALE601/601E to measure:
• Point-to-Point Leakage Current
• Probe and Transducer Isolation  Current
May only be connected to the female  connector of the Analyzer, labeled 
EXTERNAL
Vendor MODEL600/202
2107545-2
ULTRASOUND LOGIQ FAMILY  ADAPTER 
Use during M.A.P. or Isolation test
(see  10-7-9-5 - Meter Procedure 
Using Probe Adapter to Measure 
Probe Isolation (Sink) Current ) 
						

							GE HEALTHCARE
DIRECTION 2286865, REVISION 14LOGIQ™ 7 SERVICE MANUAL
10-26Section 10-7 - Electrical Safety Tests
10-7-9-3 Generic Procedure for Leakage Current
Measurements should be made with the ground open and closed, with power line mains 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.
10-7-9-4 Meter Procedure Using Dale Meter to Measure Leakage Current The ultrasound probe’s imaging area is immersed in a solution along with a grounding probe from the 
test meter to complete the current path. The solution is a mixture of water and salt. The salt adds free 
ions to the water, making it conductive. Use a mixture of 1 quart of water with one or more grams of 
table salt, mixed thoroughly.
Follow these steps to test each probe for leakage current:
1.) Turn OFF the LOGIQ™ 7 unit.
2.) Plug the unit’s mains power cord into the test meter, and plug the test meter into the tested AC wall outlet.
3.) Plug the Chassis Ground Probe (saline probe) into the test meters “CHASSIS” connector.
4.) Set the test meters “FUNCTION” switch to  “CHASSIS” (Dale 600) or ENCLOSURE LEAKAGE 
(Dale 601).
5.) Connect the probe to be tested to the LOGIQ™ 7 unit.
6.) Put the saline probe and the probe’s probe face (imaging area of the probe) into the saline bath.
7.) Power ON the LOGIQ™ 7 unit.
8.) After the LOGIQ™ 7 unit has completed the boot process, select the probe to be tested so it is the  active probe.
9.) Depress the LIFT GROUND rocker switch and record the highest current reading.
10.) Follow the test conditions described in Table 10-25 for every probe. The test passes when all readings measure less than the values shown in Table 10-15 and Table 
10-16. Figure 10-8   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 LIFT GROUND switch is depressed.
SALINE 
						

							GE HEALTHCARE
DIRECTION 2286865, REVISION 14LOGIQ™ 7 SERVICE MANUAL
Section 10-7 - Electrical Safety Tests 10-27
10-7-9-4 Meter Procedure Using Dale Meter to Measure Leakage Current  (cont’d)
11.) Keep a record of the results with other hard copies of Planned Maintenance data.
 
CAUTION
Power off
Equipment damage possibility. Never switch the Po larity or the status of the Neutral when the 
Ultrasound unit is powered on. 
Power off the Ultrasound unit, allow the stored  energy to bleed down, and turn the circuit 
breaker off BEFORE switching the POLARITY switch and/or the NEUTRAL switch on the leakage 
meter to avoid possible power supply damage.
Table 10-25   Typical Data Sheet For Probe Source Leakage Current
Probe Tested:
 Unit Power
Tester Power Polarity  SwitchTester NEUTRAL SwitchTester GROUND Switch
Measurement
Start with System Powered OFF
OFF NORMAL OPENCLOSED
OFF NORMAL OPENOPEN
OFFNORMALCLOSEDCLOSED
OFFNORMALCLOSEDOPEN
Open Neutral first, then attempt Power ON
ON NORMAL OPENCLOSED
ON NORMAL OPENOPEN
Close Neutral. Power System ON, and wait until Probe under test is active, before continuing
ONNORMALCLOSEDCLOSED
ONNORMALCLOSEDOPEN
Power System OFF using the Shutdown pop-up. 
Turn OFF System Circuit Breaker at rear of System or unplug from Meter outlet. 
Switch Tester Power Polarity switch to Reversed , then turn System Breaker ON or plug power 
cord into Meter outlet.
OFF REVERSED OPENCLOSED
OFF REVERSED OPENOPEN
OFF REVERSED CLOSEDCLOSED
OFFREVERSEDCLOSEDOPEN
Open Neutral first, then attempt Power ON
ONREVERSEDOPENCLOSED
ON REVERSED OPENOPEN
Close Neutral. Power System ON, and wait until Probe under test is active, before continuing
ONREVERSED CLOSEDCLOSED
ONREVERSEDCLOSEDOPEN 
						

							GE HEALTHCARE
DIRECTION 2286865, REVISION 14LOGIQ™ 7 SERVICE MANUAL
10-28Section 10-7 - Electrical Safety Tests
10-7-9-5 Meter Procedure Using Probe Adapter to Measure Probe Isolation (Sink) Current
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 ultrasound probe’s imaging area is immersed in a solution along with a grounding probe from the 
test meter to complete the current path. The solution is a mixture of water and salt. The salt adds free 
ions to the water, making it conductive. Use a mixture of 1 quart of water with one or more grams of 
table salt, mixed thoroughly.
Follow these steps to test each probe for leakage current.
1.) Plug the test meter into the tested AC wall outlet.
2.) Plug the Chassis Ground Probe (saline probe in diagram) into the test meters “CHASSIS” connector.
3.) Connect the probe to be tested to the LOGIQ Family Probe Adapter.
4.) Plug the LOGIQ Family Probe Adapter into the test meters connector marked “EXTERNAL”.
5.) Set the meters “FUNCTION” switch to EXTERNAL position.
6.) Put the Chassis Ground Probe and the probe’s probe face (imaging area of the probe) into the  saline bath.
7.) Depress the ISO TEST (Dale 600) or Mains on Applied Parts (MAP) (DALE 601) ROCKER SWITCH  and record the highest current reading. Figure 10-9   Probe Isolation (Sink) Current Test
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/MAP switch is depressed. 
						

							GE HEALTHCARE
DIRECTION 2286865, REVISION 14LOGIQ™ 7 SERVICE MANUAL
Section 10-7 - Electrical Safety Tests 10-29
10-7-9-5 Meter Procedure Using Probe Adapter to Measure Probe Isolation (Sink) Current  (cont’d)
8.) Test every probe and record in Table 10-26 the test results for every probe. The test passes when all readings measure less than the values in Table 10-30.
9.) Keep a record of the results with other hard copies of Planned Maintenance data.
. 
Table 10-26   Probes Tested for Isolation (Sink) Current 
Probe TestedISO/Mains Applied 
						

							GE HEALTHCARE
DIRECTION 2286865, REVISION 14LOGIQ™ 7 SERVICE MANUAL
10-30Section 10-7 - Electrical Safety Tests
GE Healthcare Leakage Current Limits for LOGIQ™ 7
The following limits are summarized for NFPA 99 (For USA) and IEC 60601-1 Medical Equipment 
Safety Standards. Measurement limits per IEC 60601-1 Medical Equipment Safety Standards, Table IV. 
 
 
NOTE: *Measurement limits per IEC 60601-1 Medical Equipment Safety Standards, Table 19.5DV.1
**Most meters (like Dale 600/601) only measure AC (rms).
***ISO (on Dale 600) and Mains Applied (on Dale 601) refer to the sink leakage test where 
mains (supply) voltage is applied to the part to determine the amount of current that will pass 
(or sink) to ground if a patient contacted mains voltage. Table 10-27   Chassis Leakage Current Limits—Accessible Metal Surfaces
CountryNormal ConditionOpen GroundReverse PolarityOpen Neutral
USA 0.1 mA
0.3 mA*0.1 mA 0.3 mA
Other 0.1 mA
0.5 mA0.1 mA
0.5 mA
Table 10-28   Type BF Applied Part Leakage Current Limits - Non-Conductive (Floating) Surface 
and Cavity Probes
All CountriesNormal ConditionOpen GroundReverse PolarityOpen Neutral
AC 0.1 mA
0.5 mA0.1 mA 0.5 mA
DC** 0.01 mA
0.05 mA0.01 mA 0.05 mA
Table 10-29   Type CF Applied Part Leakage Current Limits - Surgical Probes and ECG 
Connections
CountryNormal ConditionOpen GroundReverse PolarityOpen Neutral
USA 0.01 mA
0.05mA 0.01 mA 0.05 mA
Other 0.01 mA
0.05 mA 0.01mA0.05 mA
Table 10-30   ISO (on Dale 600) and Mains Applied (on Dale 601) Limits***
Probe TypeMeasurement
BF 5 mA
CF 0.05 mA 
						

							GE HEALTHCARE
DIRECTION 2286865, REVISION 14LOGIQ™ 7 SERVICE MANUAL
Section 10-7 - Electrical Safety Tests 10-31
Section 10-1
When Theres Too Much Leakage Current...
CHASSIS FAILS
Check the ground on the power cord and plug for continuity. Ensure the ground is not broken, frayed, 
or intermittent. Replace 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, check the other outlets to see if they could be used 
instead.
NOTE: No outlet tester can detect the condition where 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 amount of leakage, 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. 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 probes, 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 2286865, REVISION 14LOGIQ™ 7 SERVICE MANUAL
10-32Section 10-7 - Electrical Safety Tests
PM INSPECTION CERTIFICATE  
* Scan Format: Phased Array, Linear Array, Curved Array, Mechanical Array or Other
FUNCTIONAL CHECKS PHYSICAL INSPECTION AND CLEANING 
COMMENTS: 
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
Customer Name: System ID:Dispatch Number / Date Performed: Warranty/Contract/HBS
System TypeModel 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-R, MOD, Printers)
Measurement Accuracy
GE Approved Peripherals