10
AC Current Oscilloscope Probe Model MN261
CHAPTER 4
OPERATION
4.1
Current Measurement
WARNING:
Always connect the probe to the instrument
before
clamping onto the circuit under test.
• Connect the Model MN261 to the proper input channel on the
oscilloscope.
• Begin with the least sensitive range on the current probe (10mV/A).
• Select the 0.5V/Division range on the oscilloscope.
• Clamp the probe on the conductor to be measured and read the
current flowing directly on your oscilloscope.
(Remember to unclamp the probe from the conductor before disconnect
-
ing it from your meter or instrument.)
You may also use your oscilloscope to amplify the signal while using
the 1mV/A probe range (which offers the best accuracy and least phase
shift).
NOTE:
It is possible to change the range on the current probe with
-
out removing the probe from the current carrying conductor, but it is
important to remember not to exceed the permissible peak ratings
of 340mV peak or 680mV peak to peak maximum. The peak ratings
by range are: 34A peak @ 100mV/A and 340A peak @ 10mV/A.
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