Probe Leakage Current Test - GE LOGIQ 500 Service Manual

GE MEDICAL SYSTEMS
REV 10
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
N (WHITE)
G (GREEN)
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.
MOMENTARY
SWITCH
SETUP FOR PROBE LEAKAGE CURRENT
ILLUSTRATION 7–7
Note
7–12
LOGIQ 500 SERVICE MANUAL
PROBE
CONSOLE
LEAKAGE
TEST
METER
PERIODIC MAINTENANCE
P9030TA