GE Medical Systems LOGIQ ?200, Service Manual, Page: 204 / 212

GE MEDICAL SYSTEMS
LOGIQ 200 SERVICE MANUAL
2138853
PERIODIC MAINTENANCE 7–10
REV 3
7–3–4 Probe Leakage Current Test
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.
Generic Procedure
Measurements should be made with the ground open and closed, with power line 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.
POWER
OUTLET
H (BLACK) POLARITY REVERSING SWITCH
MOMENTARY
SWITCH
N (WHITE)
G (GREEN)
LEAKAGE
TEST
METER
CONSOLE
PROBE
SETUP FOR PROBE LEAKAGE CURRENT
ILLUSTRATION 7–5
Note
Each probe will have some amount of leakage current, 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.