4   
Warnings, such as the example below, precede potentially dangerous 
procedures throughout this manual. Instructions contained in the warnings must 
be followed.
WARNING Dangerous voltage levels, capable of causing death, are present in this 
instrument. Use extreme caution when handling, testing, or adjusting this 
instrument.
Safety Symbols
General definitions of safety symbols used on the instrument or in manuals are 
listed below.
Instruction Manual symbol: the product is marked with this symbol when it is 
necessary for the user to refer to the instrument manual.
Alternating current.
Direct current.
On (Supply).
Off (Supply).
In-position of push-button switch.
Out-position of push-button switch.
Frame (or chassis) terminal. A connection to the frame (chassis) of the equipment, 
which normally includes all exposed metal structure.
WARNING This warning sign denotes a hazard. It calls attention to a procedure, practice, 
or condition that, if not correctly performed or adhered to, could result in 
injury or death to personnel.
CAUTION This Caution sign denotes a hazard. It calls attention to a procedure, practice, or 
condition that, if not correctly performed or adhered to, could result in damage to 
or destruction of part or all of the product.
NOTE This Note sign denotes important information. It calls attention to a procedure, 
practice, or condition that is essential for the user to understand.