Klein Tools CL390 Manuel D'utilisation page 11

To measure current:
1. Rotate the Function Selector switch
to the 400A setting.
2. Place clamp around wire. The current
measurement will be shown in the display.
NOTE: The meter defaults to AC measurement. Press the SEL/NCV
button to toggle between AC and DC modes. The AC or DC icon on
the display indicates which mode is selected.
NOTE: If the measurement is less than 40A, rotate the Function
Selector switch
NOTE: If non-zero values are displayed prior to measuring in DC
current mode, a DC zero offset correction is required. With meter in
DC current mode, press the REL/ZERO button
current ZERO function. ZERO icon will be present on the display.
Subsequent DC current measurements automatically subtract the
offset correction for improved accuracy. Press REL/ZERO button
to return to normal measuring mode.
NOTE: Do not use DC current function if the Magnetic Hanger
accessory is attached to the back of the meter. Interferences from the
magnet can lead to inaccurate measurements.
Disconnect test leads when measuring with the clamp.
OPERATING INSTRUCTIONS
to the 4/40A setting for improved resolution.
2
2
8 to activate the DC
8
11