GE 5418099, Руководство по обслуживанию

Страница: 402 / 418

GE H
EALTHCARE
D
IRECTION
5394227, 12 LOGIQ S8/LOGIQ E8 S
ERVICE
M
ANUAL
9 - 28 Section 9-8 - Electrical Safety Tests
9-8-10 Probe leakage current test
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.
9-8-10-1 Generic Procedure on Probe Leakage Current
The most common method of measuring probe leakage is to partly immerse the probe into a saline bath
while the probe is connected to the Ultrasound system and active. This method measures the actual
leakage current resulting from the transducer RF drive.
Measurements should be made under the test conditions specified in:
• 9-11 on page 9-18, or
• 9-12 on page 9-18 as applicable.
For each combination, the probe must be active to find the worst case condition.
Figure 9-9 Set Up for Probe Leakage Current
Figure 9-10 Set Up for FibroScan Probe Leakage Current
DANGER
DO NOT USE THE PROBE IF THE INSULATING MATERIAL HAS BEEN PUNCTURED OR
OTHERWISE COMPROMISED. INTEGRITY OF THE INSULATION MATERIAL AND PATIENT
SAFETY CAN BE VERIFIED BY SAFETY TESTING ACCORDING TO IEC60601-1.