Klein Tools MM400 User Manual

9
OPERATING INSTRUCTIONS
CONNECTING TEST LEADS
Do not test if leads are improperly seated. Results could cause
intermittent display readings. To ensure proper connection, firmly
press leads into the input jack completely.
TESTING IN CAT III / CAT IV MEASUREMENT LOCATIONS
Ensure the test lead shield is pressed firmly in place. Failure to use
the CAT III / CAT IV shield increases arc-flash risk.
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.
5/32"
(4 mm)
.7" (18 mm)
INCORRECT
CORRECT
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Klein Tools MM400 Specifications

General

Product type	Digital multimeter
DC voltage range	600 - 600 V
Measuring category	CAT III 600V
Placement supported	Handheld multimeter
Resistance resolution	40 Ω
Resolution (frequency)	50 Hz
Temperature measurement range	-18 - 538 °C
Display digits	4000 digits
Battery type	AAA
Power source	Battery
Number of batteries supported	2

Weight and Dimensions

Depth	152 mm
Width	80 mm
Height	45 mm
Weight	231 g