Filter
Top Products
M2540-92000-01 A M2540 Ultrasound System Field Service Manual Page 91
Performance Tests: Electrical Safety Tests
WARNING
Some users routinely perform a safety-earth or ground-bonding test at currents in excess of
10 amps. Test currents in excess of 1 amp will likely exceed the impedance limit specification,
and can damage the RFI protection finger contacts. Exposed metal on the transducer assembly,
including the connector, are for RFI and are not safety grounds.
Figure 6-1 Chassis to Ground Resistance Test Diagram
➤ Chassis to Ground Resistance Test Procedure
To test the system for resistance between chassis and ground:
1. Inspect the power cord for cracks and wear.
2. Set the mode on the analyzer to measure resistance in the power cord.
3. Plug the analyzer into an available AC wall outlet. Plug the ultrasound system power plug into
the test receptacle on the analyzer.
Hot -
Neutral -
Ground wire
Green or
R
= 200 milliohms maximum
Chassis
R
LIMIT:
UL, CSA and IEC:
300e036
Green/Yellow
Power cord disconnected from AC power.
ground
System
under
test
(resistance)