Remove all probes, test leads and accessories that are not in use.
Use only correct Measurement Category (CAT), voltage, temperature, altitude, and amperage rated probes, test leads, and
adapters for any measurement.
Beware of high voltages
Understand the voltage ratings for the probe you are using and do not exceed those
ratings. Two ratings are important to know and understand:
• The maximum measurement voltage from the probe tip to the probe reference
lead
• The maximum floating voltage from the probe reference lead to earth ground
These two voltage ratings depend on the probe and your application. Refer to the
Specifications section of the manual for more information.
Warning: To prevent electrical shock, do not exceed the maximum
measurement or maximum floating voltage for the oscilloscope input BNC
connector, probe tip, or probe reference lead.
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 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).
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:
Important safety information
6 Series B MSO MSO64B, MSO66B, MSO68B Service
ix
