Using the Probe
14
3 Perform the steps in “Demagnetization and Zero Adjustment" on
page 16.
4 Using the probe’s opening lever, clamp the sensor head around
the conductor to be measured as shown in Figure 4 on page 14.
Figure 4 Use the Opening Lever
5 To obtain the best accuracy, ensure that:
- The current direction indicator on the sensor aligns with actual
current direction in the conductor.
- The sensor opening lever is in the Locked position
- The cable is centered in the sensor head.
6 At high frequencies, common mode noise may affect
measurements taken on the high voltage side of circuits. If this
occurs, reduce the frequency range of the measuring instrument
or clamp onto the low-voltage side of the circuit (as shown in
Figure 5 on page 15), as appropriate.
Always use the opening lever when opening the probe’s sensor
head. If an upper core is forced to open when the sensor head is
locked, the open-close mechanism can be damaged.
When performing continuous measurements, it is necessary to be aware
that the zero offset voltage will drift if the ambient temperature changes.
Under certain circumstances, oscillation may occur if the probe is
connected to the AutoProbe interface while the Infiniium is on. This does
not indicate a malfunction. Oscillation can be stopped and operation
restored to normal by opening and closing the sensor head.
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