YOKOGAWA CL255, Руководство пользователя

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IM CL255
9
(4) Press the button once to enter from the normal mode to the
continuity check mode. " " should be indicated on the display.
(5) Connect the tip of the test leads to the circuit under test. If the
re-sistance is 20Ω or less, the buzzer beeps.
2.8 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, " " 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.
WARNING
● Never use the instrument on a high voltage circuit above 750VAC. This
may cause electrical shock hazard and damage to the instrument or the
circuit under test.
● Do not make current measurement with the test leads plugged into the
instrument.
(1) Set the Function Selector switch to the " A " or " V " position.
(2) Press the
button three times to enter from the normal mode to
the frequency measurement mode. " " should be indicated on the
display.
(3) Follow instructions for ACA or ACV measurement and take the frequen-
cy reading.
NOTE
When the voltage under test measures 3% of the full scale or less, or the
frequency of the current or voltage is 40Hz or less, "LoHz" is indicated on
the display.