GE HEALTHCARE - KRETZTECHNIK VOLUSON® 730EXPERT (BT03)
D
IRECTION 105899, REVISION 3 DRAFT (APRIL 29, 2008) SERVICE MANUAL
Chapter 10 - Care & Maintenance 10-15
10-7-4 Grounding Continuity
Measure the resistance from the third pin of the attachment plug to the exposed metal parts of the case.
The ground wire resistance should be less than 0.2 ohms.
Reference the procedure in the IEC60601-1-1.
10-7-4-1 Meter Procedure
Follow these steps to test the ground wire resistance.
1.) Turn the Voluson® 730Expert unit OFF.
2.) Connect one of the Ohmmeter probes to the tested AC wall outlet (Ground pin).
3.) Using the other Ohmmeter probe, touch the exposed metal part of the Voluson® 730Expert unit.
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 and record the ground wire resistance.
CAUTION
!! CAUTION:
Electric Shock Hazard. The patient must not be contacted to the equipment during this test
Figure 10-2 Ground Continuity Test
CAUTION
!! CAUTION:
Lacquer is an isolation barrier! Resistor may be high-impedance!
Measure only on blank parts, stated in Figure 10-2 above.
ACCESSIBLE METAL PARTS
GROUND PIN
OHMMETER
Potential equilibrium connector
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