GE MEDICAL SYSTEMS
LOGIQ A1 BASIC SERVICE MANUAL
REV 2
5176463-100
17
Meter Procedures
Follow these steps to test the ground wire resistance.
1. Turn the main unit LOGIQ A1.
2. Plug the unit into the meter, and the meter into the tested AC wall outlet. (Refer
Illustration 2-3)
3. Plug the black chassis cable into the meter’s “CHASSIS” connector and attach the
black chassis cable clamp to an exposed metal part of LOGIQ A1.
4. Set the meter’s “FUNCTION” switch to the RESISTANCE position.
5. Set the meter’s “POLARITY” switch to the OFF (Center) position.
6. Measure the ground wire resistance and keep a record of the results with other hard
copies of Preventive Maintenance (PM) data kept on site.
2-3-3 Chassis Leakage Current Test
Definition
Leakage current is the electrical current that could flow through the patient or
sonographer should a ground wire break. The unit, the probes and all external
peripherals must be tested.
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.
SETUP FOR CHASSIS SOURCE LEAKAGE CURRENT
Illustration 2-4
