Controls and Features
Controls and features, (cont.)
Item
Description
Range selector button and indicators
Press the button to select between the
voltage range (attenuation) settings of the
probe. The range and units are indicated
on the probe and may be displayed on
the oscilloscope screen, depending on
the oscilloscope model.
The OVERRANGE LED lights if the
applied voltage exceeds the selected
range. To extinguish the LED, select
a higher range. If a higher range is
not available, do not attempt to take
the measurement with the probe. (See
warning below.)
WARNING.
The Overrange indicator does not detect an overrange condition of
common mode voltages or voltage-to-earth potential at the probe inputs. The
Overrange indicator only detects differentially between the + and – inputs, not
relative to ground. Do not exceed the common mode voltage or voltage-to-earth
probe ratings when taking measurements. If you are not sure,
fi
rst take a
single-ended measurement of each point that you intend to measure differentially.
Take a single-ended measurement by tying one input lead to ground (for example,
the – input) and then connecting the other lead (for example, the + input) to the
points of interest, one at a time.
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