Klein Tools ET250 Manuel D'instructions page 6

ENGLISH
OPERATING INSTRUCTIONS
TESTING IN CAT III / CAT IV MEASUREMENT LOCATIONS
Ensure the test lead shield is pressed firmly in place. Failure to use
the CATIII / CATIV shield increases arc-flash risk.
5/32"
(4 mm)
TESTING IN CAT II MEASUREMENT LOCATIONS
CAT III / CAT IV shields may be removed for CAT II locations. This
will allow testing on recessed conductors such as standard wall
outlets. Take care not to lose the shields.
.7" (18 mm)
AC/DC VOLTAGE (LESS THAN 600V)
Apply test leads to the system under test to measure voltage; the
voltage measured will be reflected in the display. The tester will
automatically detect the presence of AC or DC voltage and illuminate
the appropriate icon in the display.
NOTE: Test-leads seated in the lead holders on the back of the tester
are spaced correctly to test tamper-resistant US-style outlets.
CAUTION: The maximum testing voltage is 600V. 'OL' will show
in the display if voltage in excess of 600V is detected. No other
warnings will be delivered for voltages above 600V. Testing voltages
above 600V should not be attempted under any circumstances.
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