GE FQ000040, Руководство по обслуживанию

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GE
D
IRECTION
FQ091019, R
EVISION
2 V
IVID Q
N S
ERVICE
M
ANUAL
Chapter 10 - Care and Maintenance 10-29
10-6-9 Probe Current Leakage Test
10-6-9-1 Definition
This test measures the current that would flow to Ground (from any of the probes) through a patient who
is being scanned, and who becomes grounded by touching some other grounded surface.
10-6-9-2 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.
NOTE: Each probe will have a certain amount of current leakage, depending on its design. Small
variations in probe current leakages are normal from probe to probe. Other variations will result
from differences in line voltage and test lead placement.
Figure 10-5 Set Up for Probe Current Leakage Test
POWER
OUTLET
H (BLACK)
POLARITY REVERSING SWITCH
MOMENTARY
SWITCH
N (WHITE)
G (GREEN)
LEAKAGE TEST
METER
CONSOLE
PROBE