IM CL250
5
(2) Press the open/close lever to open the transformer jaws and clamp them
onto the conductor under test and take the reading on the display. The
most accurate reading will be obtained by keeping the conductor at the
center of the transformer jaws.
NOTE
● During current measurement, keep the transformer jaws fully closed.
Otherwise, accurate measurement cannot be made. The Maximum
measurable conductor size is 55mm in diameter.
● Unlike in DC current measurement, zero adjustment is not necessary in AC
current measurement. There is no polarity in the reading either.
● The output voltage from the OUTPUT terminal may not reduce to nil even if
the display is zero adjusted with the
button. In this case, make zero
adjustment on the recorder or other device that the output voltage is
connected to.
2.4 DC Voltage Measurement
WARNING
Do not make measurement on a circuit above 1000VDC. This may cause
electric shock hazard.
(1) Set the Function Selector switch to the "
400V" or "
1000V"
position. If the instrument is in the AC mode, press the
button once to
select the DC mode. (The instrument is set to the AC mode when it is
powered on.) "DC" should be shown on the upper left corner of the display.
(2) Slide the terminal cover to the left. Plug the red test lead into the Hi
terminal and the black test lead into the Lo terminal.
