GE HEALTHCARE
DIRECTION 2286865, REVISION 14 LOGIQ™ 7 SERVICE MANUAL
10-28 Section 10-7 - Electrical Safety Tests
10-7-9-5 Meter Procedure Using Probe Adapter to Measure Probe Isolation (Sink) Current
The Dale 600/600E provides a method for testing probes independently from the system. The meter
utilizes a probe adapter to apply a test potential commonly to all connector pins.
The ultrasound probe’s imaging area is immersed in a solution along with a grounding probe from the
test meter to complete the current path. The solution is a mixture of water and salt. The salt adds free
ions to the water, making it conductive. Use a mixture of 1 quart of water with one or more grams of
table salt, mixed thoroughly.
Follow these steps to test each probe for leakage current.
1.) Plug the test meter into the tested AC wall outlet.
2.) Plug the Chassis Ground Probe (saline probe in diagram) into the test meter's “CHASSIS”
connector.
3.) Connect the probe to be tested to the LOGIQ Family Probe Adapter.
4.) Plug the LOGIQ Family Probe Adapter into the test meter's connector marked “EXTERNAL”.
5.) Set the meter's “FUNCTION” switch to EXTERNAL position.
6.) Put the Chassis Ground Probe and the probe’s probe face (imaging area of the probe) into the
saline bath.
7.) Depress the ISO TEST (Dale 600) or Mains on Applied Parts (MAP) (DALE 601) ROCKER SWITCH
and record the highest current reading.
Figure 10-9 Probe Isolation (Sink) Current Test
CAUTION
To avoid probe damage and possible electric shock, do not immerse probes into any liquid
beyond the level indicated in the probe users manual. Do not touch the probe, conductive liquid
or any part of the unit under test while the ISO Test/MAP switch is depressed.
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