Mindray DC-68, Service Manual

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A-6 Electrical Safety Inspection
ELECTRICAL SAFETY INSPECTION
4- Protective Earth Resistance
2) Attach the 601PRO RED input lead to the device’s Protective Earth terminal or an exposed
metal area.
3) Press shortcut key 3. The Protective Earth Resistance test is displayed.
4) Press SOFT KEY 3 to select a test current (1AMP, 10AMP, or 25AMP). The selected test
current is displayed in the upper right corner of the display.
5) Press START TEST to start the test. The test current is applied while resistance and current
readings are taken. This takes approximately 5 seconds.
6) Press the print data key at any time to generate a printout of the latest measurement(s).

NOTE
When "Over" is displayed for Ohms, this signifies that a valid measurement was not obtained
because either an open connection was detected or that the measurement was not within range.
Readings greater than 9.999 Ohms will be displayed as Over.

Failure
Once it reaches the limitation, stop using equipment. Check the protective earth connection
between
Protective Earth terminal and Protective Earth Metal enclosure and equipotential terminal;
Retest
and inform the Customer Service Engineer for analysis and disposal if still fail.
LIMITS
ALL COUNTRIES R = 0.2
Ω
Maximum