Operating Precautions
6
Before Connecting and Powering On
Power and Grounding
• Before turning the instrument on, make sure the supply voltage
matches that indicated on the its power connector. Connection
to an improper supply voltage may damage the instrument and
present an electrical hazard.
• To avoid electrical accidents and to maintain the safety
specifications of this instrument, connect the power cord only
to a 3-contact (two-conductor + ground) outlet.
Connections
To avoid electric shock or damage to the equipment, always
observe the following precautions when connecting to external
terminals or connectors.
• Always turn off the power to the instrument and to any devices
to be connected before making connections.
• Be careful to avoid exceeding the ratings of external terminals
and connectors.
• During operation, a wire becoming dislocated and contacting
another conductive object can be serious hazard. Make sure
that connections are secure and use screws to secure the
external connectors.
To suppress noise, the instrument needs to be set to match the
frequency of the power source.
Before operating, set the instrument to the frequency of your
commercial power. If the line frequency is not set properly,
measurements will be unstable.
❖ 2.8 Selecting the Line Frequency (Page 25)
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