GE Vivid 7 - Isolated Patient Lead (Source) Leakage-Lead to Ground

GE HEALTHCARE
DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL
Chapter 10 - Care & Maintenance 10 - 17
10-7-5-2 Generic Procedure (cont’d)
.
8.) Keep a record of the results with other hard copies of PM data kept on site.
10-7-5-3 Data Sheet for Chassis Source Leakage Current
The test passes when all readings measure less than the value shown in Table 10-12. Record all data
on the PM Inspection Certificate.
10-7-6 Isolated Patient Lead (Source) Leakage–Lead to Ground
10-7-6-1 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 ultrasound console Off and On. For each
combination the operating controls, such as the lead switch, should be operated to find the worst case
condition.
Table 10-15 Chassis Leakage Current Test Condition
TEST CONDITION
1
Mounting screw for probe receptacle
2
Wheel support
3
Mounting screw for CRT housing
4
Mounting screw for peripheral plugged into unit
5
Mounting screw for other peripheral powered by unit
Table 10-16 Typical Data Sheet for Chassis Source Leakage Current
Unit Power
Tester Polarity
Switch
Tester Neutral
or Ground
Switch
Test 1
Probe
Connector
Test 2
Wheel
Test 3
CRT
Optional
Test 4
Optional
Test 5
Enter Name of tested peripheral here:
ON NORM OPEN
ON NORM CLOSED
ON REV OPEN
ON REV CLOSED
OFF NORM OPEN
OFF NORM CLOSED
OFF REV OPEN
OFF REV CLOSED
CAUTION
Equipment damage possibility. Never switch the Polarity when the unit is powered ON. Be sure
to turn the unit power OFF before switching the polarity using the POLARITY switch. Otherwise,
the unit may be damaged.