pico Technology PicoScope 2203, User Manual

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Introduction
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2.3
Safety warning
We strongly recommend that you read the general safety information below before
using your oscilloscope for the first time. Safety protection built in to equipment may
cease to function if the equipment is used incorrectly. This could cause damage to
your computer, or lead to injury to yourself and others.
Maximum input range
The PicoScope 2203, 2204 and 2205 PC Oscilloscopes are designed to measure
voltages in the range -20 V to +20 V. The Ch A and Ch B inputs are protected to
±100 V. Contact with voltages outside the protection range may cause permanent
damage to the unit.
Mains voltages
These products are not designed for use with mains (line power) voltages. To
measure mains, use a differential isolating probe specifically designed for high
voltages.
Safety grounding
The PicoScope 2203, 2204 and 2205 PC Oscilloscopes connect directly to the ground
of a computer through the USB cable provided to minimise interference.
As with most oscilloscopes, avoid connecting the ground input to any potential other
than ground. If in doubt, use a meter to check that there is no significant AC or DC
voltage between the ground input of the oscilloscope and the point to which you
intend to connect it. Failure to check may cause damage to your computer or injury to
yourself and others.
The product does not have a protective safety ground.
Repairs
The oscilloscope contains no user-serviceable parts. Repair or calibration of the
oscilloscope requires specialised test equipment and must be performed by Pico
Technology.