9
•Remove any Voltage test leads from the
instrument.
•Move the rotary switch to Amps AC, DC or
DCRMS*.
•Wait until the autozero operation has completed
and the display reads 00.00 (LH240), 000.0
(LH1040, LH2040, LH2015) to within ±3 digits.
•Press the trigger to open the jaws and clamp them
around the current carrying conductor as shown in
Fig. 2
•Read the display
•Use the HOLD button to freeze the display.
•Use the
))))/MAX button to measure the max RMS
current.
•Note that the Amps autozero is initiated by the
movement of the rotary switch from the Ωposition
to the Amps measurement positions. If, after a
high current measurement, the display does not
return to zero, then a re-autozero can be initiated
by the movement of the rotary switch into and out
of the Ωselection position for the LH40 series and
from OFF to Amps DC for the LH2015.
3.2 Resistance Measurement *
•Insert the test leads into the sockets on the front of
the instrument, the red lead to the VΩterminal
and the black lead to the COM terminal.
•Move the rotary switch to the Ωposition.
•Apply the test leads across the component whose
resistance is to be measured. Read the displayed
value.
•Use the HOLD button to freeze the display. Use
the ))))/MAX button to select the continuity facility.
The buzzer will sound for resistance
measurements below ≈50Ω.
