Type Bf Patient Leakage Current Test - Probe - GE LOGIQ S7 Expert Service Manual

GE H DRAFT
EALTHCARE
D 5460683, R
IRECTION EVISION
10-8-7

Type BF Patient Leakage Current Test - Probe

10-8-7-1 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.
NOTE: Some leakage current is expected on each probe, depending 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. It is abnormal if no leakage current is measured. If no leakage current
is detected, check the configuration of the test equipment.
Equipment damage possibility. Never switch the Polarity and the status of Neutral when the unit
CAUTION
is powered ON. Be sure to turn the unit power OFF before switching them using the POLARITY
!! CAUTION:
switch and/or the NEUTRAL switch. Otherwise, the unit may be damaged.
10-8-7-2 Generic Procedure on Leakage Current
Measurements should be made with the ground open and closed, with power line polarity normal and
reversed, and with neutral open and closed. For each combination, the probe must be active to find the
worst case condition.
NOTE: Saline water pod should be insulated from floor and earth ground
Table 10-18 Typical Data Sheet for Type BF Patient Leakage Current Test
Tester Neutral
Closed
Closed
Closed
Closed
Open
Open
3 DRAFT (J
Figure 10-19 Set Up for Probe Leakage Current
Tester Polarity Switch
Normal
Normal
Reversed
Reversed
Normal
Reversed
Chapter 10 - Care & Maintenance
25, 2014)
UNE
Insulator
Ground Switch
Closed
Open
Closed
Open
Closed
Closed
LOGIQ™ S7 E /P
XPERT RO
S M
ERVICE ANUAL
Measured leakage current
10-29