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4535 612 34161 HD3 Service Manual Page 131
CSIP Level 1 Performance Tests: Electrical Safety
➤ To test the system ground wiring for leakage
1. Set the mode on the analyzer to detect leakage.
2. Plug the analyzer into an available wall outlet. Plug the ultrasound system power plug into the
test receptacle on the analyzer. Turn on the ultrasound system’s power by starting the inter-
nal PC.
3. Take ground wire leakage current measurements in an open ground condition, with both
normal and reverse polarity. Record the highest value, and compare it to the limit specified
for Normal condition in Figure 6-2.
4. Take ground wire leakage current measurements in an open ground and open neutral condi-
tion, with both normal and reverse polarity. Record the highest value, and compare it to the
limit specified for Single Fault condition in Figure 6-2.
A reading higher than acceptable limits can indicate a problem with the power cord, with its
associated connections, or with the power transformer.
Tr a ns d uc e r
Te s t s
This section describes two electrical leakage current tests for transducers. To ensure patient
safety, it is very important to verify the integrity of the insulating layers of all transducers.
When you perform the safety tests, use saline solution in a container as a conductive medium.
The solution penetrates any cracks or holes in the transducer insulation and provides an electri-
cal path between the submerged lead wire and the inner transducer shield.
The following tools are required for these transducer safety tests:
• Safety analyzer
• Saline holder
• ECG lead wire
• Saline solution. If saline is not available, mix 27 grams of table salt in 3 liters of tap water.