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PicoScope 4225A and 4425A automotive oscilloscopes and accessories
If a signal voltage exceeding the selected full-scale measurement range is detected, it is indicated
on the measurement display. A red warning icon will appear in the upper left corner and next to the
relevant channel's vertical axis.
Similarly, if the selected maximum common mode voltage is exceeded, a yellow warning icon will
appear in the upper left corner of the display and next to the relevant channel's vertical axis. In
these conditions, displayed waveforms and measurements may be incorrect, and the condition
may be hazardous.
Select a larger voltage range to achieve a within-range measurement and if the condition persists,
to prevent injury or death, disable or otherwise safely disconnect from the source of overvoltage.
GROUNDING THE INSTRUMENT AND ITS ACCESSORIES
The oscilloscope's ground connection through the USB cable is for measurement purposes only. It
does not have a protective safety ground.
Never connect the ground input (chassis) to any electrical power source. To prevent personal
injury or death, use a voltmeter to check that there is no significant AC or DC voltage between the
oscilloscope ground and the point to which you intend to connect it.
Pico resistance-measuring accessories have a black ground terminal. This connects directly to the
scope chassis and USB ground. As above, do not connect this to any electrical power source.
Applying a voltage to the ground input is likely to cause permanent damage to the oscilloscope,
the attached computer, and other equipment.
To prevent measurement errors caused by poor grounding, always use the high-quality blue USB
cable supplied with the oscilloscope.
Note: The oscilloscope is powered through the USB connector. No additional power supply unit is
required.
Note: Maximum power requirement from the 5 V USB supply is 7.5 W.
To prevent injury or death and to avoid potential damage to the oscilloscope, only connect the
unit's USB connector to IT equipment approved to IEC/EN 60950, IEC/EN 62368 or an equivalent
standard.
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WARNING
WARNING
CAUTION
CAUTION
WARNING
Safety Guide
DO336-4
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