Care and Maintenance
4-38 Ultrasound System – Common Service Information
Direction 5444964-100 English
 Rev. 5
Generic procedure on probe leakage current  (continued)
9.  Test opening and closing the ground with the Ultrasound 
system on and off.
a.  Power ON the Ultrasound system.
b.  After the Ultrasound system has completed the boot 
process, select the probe to be tested so it is the active 
probe.
c.  Depress the “LIFT GROUND” rocker switch and record 
the highest current reading.
d.  Follow the test conditions and test limits described in:
•  Table 4-6 on page 4-20, or:
•  Table 4-7 on page 4-21, as applicable for every probe.
10. Record the highest current reading.
The test passes when all readings measure less than the stated 
limits.
The actual location of the test probe may vary by Ultrasound 
system. Measurements should be recorded for each probe 
under the set of test conditions.
Record all data and keep the record of the results with other 
hard copies of maintenance data.