Isolated Patient Lead (Source) Leakage-Lead To Ground - GE Voluson E Series Service Manual

Care and Maintenance

10.6.6 Isolated Patient Lead (Source) Leakage-Lead to Ground

Caution: Equipment damage possibility!
Never switch the Polarity when the Voluson E-Series system is powered ON. Be sure to turn the Voluson E-
Series system power OFF before switching the polarity using the POLARITY switch.
10.6.6.1 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 Voluson E-Series ultrasound system on and off.
For each combination the operating controls, such as the lead switch, should be operated to find the worst
case condition.
10.6.6.2 Generic Procedure
1. Connect the Safety analyzer to an AC wall outlet.
2. Plug the equipment under test into the receptacle on the panel of the meter.
3. Connect the ECG cable to the Voluson E-Series system and the patient leads to the analyzer.
4. Select the "Patient Lead Leakage" function on the meter.
5. Test opening and closing the ground with the Voluson E-Series system on and off.
For more information, refer to the safety analyzer's user manual that will be used to perform the test.
Note
Measurements should be made under the test conditions specified in:
•
Table 10-10 on page 10-11
For each combination, the operating controls, such as the lead switch, should be operated to find the worst
case condition.
Record all data and keep the record of the results with other hard copies of maintenance data.
1 Voluson E-Series ultrasound system
2 Mains power cable
3 Accessible Metal Parts (chassis - non-earth ground, unprotected surface)
4 ECG patient cable
5 Electrical safety analyzer
6 AC wall outlet
10-16
, as applicable.
Figure 10-3 Set Up for test of Earth Leakage Current, UL60601-1/IEC60601-1
Voluson E-Series Service Manual
5539550APB Revision 6