Electrical safety tests
Ultrasound System – Common Service Information 4-23
Direction 5444964-100 English Rev. 5
Outlet test - wiring arrangement - USA and Canada
Test all outlets in the area for proper grounding and wiring 
arrangement by plugging in the neon outlet tester and noting the 
combination of lights that are illuminated. Any problems found 
should be reported to the hospital immediately and the 
receptacle should not be used.
 Figure 4-1. Typical alternate outlet tester
NOTE:  No outlet tester can detect the condition where the Neutral 
(grounded supply) conductor and the Grounding (protective 
earth) conductor are reversed. If later tests indicate high leakage 
currents, this should be suspected as a possible cause and the 
outlet wiring should be visually inspected.
1. Correct Wiring
2.  Open Ground Wire
3. Reversed Polarity
4.  Open Neutral Wire
5.  Hot and Ground Reversed
6.  Open Hot Wire