Tektronix OI tek P5200A Series Installation And Safety Instructions page 25

Controls and features, (cont.)
Item
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, first 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.
Description
Attenuation 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.)
Controls and Features
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