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Safety Guide
CURRENT CLAMPS
Most current probes have a tactile barrier provided for user safety.
To prevent injury or death, do not hold any current probe with a tactile barrier anywhere beyond the
barrier when in use.
Current probes are marked with their maximum voltage rating, which applies when clamped
over an uninsulated conductor. To prevent injury or death, do not use any current probe on an
uninsulated conductor operating outside the probe's marked voltage protection levels.
A current probe not marked with a voltage rating is for use on insulated conductors only.
To prevent injury or death, never use a current probe without a marked voltage rating on an
uninsulated conductor.
To prevent injury or death, if the probe has a
always de-energize any uninsulated conductor before you install or remove the probe.
A current probe with the
conductor while the conductor is energized (live).
When measuring currents in uninsulated circuits connected directly to the utility power supply,
always use probes with the appropriate CAT ratings.
To prevent injury or death, always follow the CAT rating of the probe and do not use a non CAT-
rated current probe to measure utility power current.
Always use extreme caution when working around bare conductors or bus bars. Contact with
the conductor could result in electric shock. Always follow relevant industry-standard safety
procedures and use appropriate Personal Protective Equipment (PPE) where applicable. Safety
training is essential in these cases and should be separately gained.
DO336-4
PicoScope 4225A and 4425A automotive oscilloscopes and accessories
WARNING
WARNING
WARNING
symbol may be safely installed on or removed from an uninsulated
WARNING
symbol or is not marked with any symbol,
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