Operator Information
4
P6021 Instruction Manual
Operating Considerations
The information in this section will help you make effective use of your P6021
probe.
H
Sensitivity Control — The P6021 termination has a control that allows you
to select probe sensitivity. The switch has two positions: 2 mA/mV and
10 mA/mV. When the control is in the 2 mA/mV position, the oscilloscope
displays 1 mV for every 2 mA of current in the circuit under test. When the
control is in the 10 mA/mV position, the oscilloscope displays 1 mV for
every 10 mA of current in the circuit under test.
You can set vertical scale on the oscilloscope to any scale factor, as
determined by the signal amplitude. To calculate the overall vertical scale
factor for the oscilloscope, probe, and termination, multiply the termination
sensitivity control setting by the vertical scale factor of the oscilloscope. For
example, if the termination control is set to the 10 mA/mV position and the
oscilloscope to a vertical scale of 20 mV/division, the overall scale factor is
10 X 20, or 200 mA/division.
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Probe Slide Switch — The slide switch on the probe has three positions:
open, closed, and locked. Use your thumb to move the probe slide switch.
The switch is spring loaded so that it automatically moves from the open to
closed positions.
To Use the Probe:
a. Pull the slide switch toward you, and hold the switch in position.
b. Place the conductor-under-test inside the exposed transformer core. The
arrow on the transformer end of the probe indicates conventional current
flow. If you place the probe on the conductor so that the arrow on the
probe matches conventional current flow through the conductor,
orientation of the displayed waveform will be correct.
c. Release the switch, allowing the probe to close.
d. Lock the slide switch. To lock the switch, push it firmly toward the
transformer (the switch will move only about 1/8th inch). Locking the
switch assures maximum contact between the two halves of the
transformer secondary. The conductor now becomes the primary of the
transformer. (When measuring current, always check that the probe slide
switch is moved completely forward into the locked position.)
WARNING. To prevent shock when measuring uninsulated conductors, keep your
hands and fingers behind the ridge on the probe head.
Sensitivity
control
Probe
slide switch
Open
Closed
Locked
Ridge
Features and Controls
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