Probe Leakage Current Test - GE Vivid 7 Service Manual

GE H
EALTHCARE
D FC091194, R
IRECTION EVISION
10-7-9

Probe Leakage Current Test

10-7-9-1 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.
10-7-9-2 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.
H (BLACK)
N (WHITE)
POWER
OUTLET
G (GREEN)
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.
11
POLARITY REVERSING SWITCH
MOMENTARY
SWITCH
Figure 10-5 Set Up for Probe Leakage Current
Chapter 10 - Care & Maintenance
V 7 S
IVID ERVICE
PROBE
CONSOLE
LEAKAGE TEST
METER
M
ANUAL
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