Connect and disconnect
properly
Connect the probe output to the measurement product before connecting the probe to the circuit under test.
Connect the probe reference lead to the circuit under test before connecting the probe input. Disconnect the
probe input and the probe reference lead from the circuit under test before disconnecting the probe from the
measurement product.
Connect and disconnect
properly
De-energize the circuit under test before connecting or disconnecting the current probe.
Connect the probe reference lead to earth ground only.
Do not connect a current probe to any wire that carries voltages or frequencies above the current probe
voltage rating.
Inspect the probe and
accessories
Before each use, inspect probe and accessories for damage (cuts, tears, or defects in the probe body,
accessories, or cable jacket). Do not use if damaged.
Ground-referenced
oscilloscope use
Do not float the reference lead of this probe when using with ground-referenced oscilloscopes. The
reference lead must be connected to earth potential (0 V).
Risk assessment warnings and information
Service safety summary
The Service safety summary section contains additional information required to safely perform service on the product. Only qualified
personnel should perform service procedures. Read this Service safety summary and the General safety summary before performing any
service procedures.
To avoid electric shock
Do not touch exposed connections.
Do not service alone
Do not perform internal service or adjustments of this product unless another person capable of rendering
first aid and resuscitation is present.
Disconnect power
To avoid electric shock, switch off the product power and disconnect the power cord from the mains power
before removing any covers or panels, or opening the case for servicing.
Use care when servicing with
power on
Dangerous voltages or currents may exist in this product. Disconnect power, remove battery (if applicable),
and disconnect test leads before removing protective panels, soldering, or replacing components.
Verify safety after repair
Always recheck ground continuity and mains dielectric strength after performing a repair.
Terms in the manual
These terms may appear in this manual:
Warning: Warning statements identify conditions or practices that could result in injury or loss of life.
CAUTION: Caution statements identify conditions or practices that could result in damage to this product or other property.
Terms on the product
These terms may appear on the product:
• DANGER indicates an injury hazard immediately accessible as you read the marking.
• WARNING indicates an injury hazard not immediately accessible as you read the marking.
• CAUTION indicates a hazard to property including the product.
Important safety information
3 Series MDO Mixed Domain Oscilloscope Service Manual
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