UNI-T UT-P40 Instruction Manual page 19

neutral wires may give you a zero reading.
(Remember to unclamp the probe from the
conductor before disconnecting it from your
meter or instrument).
5. Adjust the probe channel and oscilloscope's time base
as necessary to get a clear and stable view of the signal.
Set the oscilloscope input to DC volts to see both the AC
and DC currents; set the channel to AC to see the AC
current only.
6.The current drawn by different devices look much
different than that of others. While the RMS current can
only be used in low frequency current, the momentary
peaks may be quite high. Figure 3 shows the difference
between the line current drawn by a resistive load and a
motor controller.
7.Congratulations on your purchase of the UT-P40, a
multifunctional current probe. When connecting to a
digital meter, use the recommended MT-246N
(BNC-to-banana adapter). Connect the black lead to the
meter COM (black letters on the meter), and the red lead
to the VΩ input (red letters on the meter).
8.To measure only AC current, set the meter to measure
AC volts.
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