KYORITSU 2009A - Manual (Page 20)

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６−６ Continuity Check (400Ω range fixed)
※The continuity check mode is enabled by pressing the mode selector
switch on resistance range. " " is indicated on the display to show
the instrument in the continuity check mode. The buzzer beeps, if the
resistance under test is 20.0Ω or less.
DANGER
●Never use the instrument on an energized circuit.
●Do not make measurement with the battery compartment cover
removed.
●Keep your fingers and hands behind the barrier during measurement.
①Set the function selector switch to the " Ω" position.
②Slide the terminal cover to the left to disclose the V/Ω and COM
terminals. Plug the red test lead into the V/Ω terminal and the black
test lead into the COM terminal.
③With the tip of the test leads shorted together, press the Zero
Adjust/Reset button to offset the resistance of the test leads.
④Press the mode selector button once to enter from the normal mode
to the continuity check mode. " " should be indicated on the
display.
⑤Connect the tip of the test leads to the circuit under test. If the
resistance is 20.0Ω or less, the buzzer beeps.
６−７ Frequency Measurement
●On ACA or ACV range, the frequency of the current or voltage under
test can be counted and shown on the display.
●In the frequency measurement mode, "Hz" is indicated on the display.
●Trigger threshold is approx. 10V for AC voltage and approx. 10A for AC
current. At frequency measurement, in case of low input signal, it often
happens that measurement cannot be made. Because range is fixed at
400V for AC voltage and at 400A for AC current.