Pico Technology PC Sampling Oscilloscope Quick Start Guide
DO134-8 5
2.2 Maximum input ranges
Safe input range ±2 V relative to ground
Operating input range ±1 V relative to ground
Observe all terminal ratings and warnings marked on the product.
Operate within the safe input range to prevent electric shock and injury.
To prevent injury or death, PicoScope 9000 Series oscilloscopes must not
be connected to the mains (line power), either directly or through any
probe, adaptor, attenuator, or connector, except the AC adaptor supplied
with the product.
Operation outside of the safe input range is likely to cause permanent
damage to the oscilloscope and other equipment.
To prevent permanent damage, do not directly connect the high-voltage
differential step generator of the PicoScope 9311 to channel inputs or
other equipment. Do not remove the 20 dB pads fitted to the generator
outputs, as they ensure the signal is reduced to safe levels. Do not
replace the pads with smaller values unless safety is ensured by other
test circuit losses and peak ratings.
2.3 Grounding
The oscilloscope's ground connection through the USB cable is for
measurement purposes only. The oscilloscope does not have a protective
safety ground.
Do not 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.
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 USB cable supplied with the oscilloscope.
