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SAFETY CONSIDERATIONS
GENERAL. This is a Safety Class 1 instrument (provided with terminal for connection to protective earth ground).
OPERATION. BEFORE APPLYING POWER verify that the product is set to match the available line voltage, the
correct line fuse is installed, and all safety precautions (see following warnings) are taken. In addition, note the instrument's
external markings described under "Safety Symbols".
WARNING.
• Servicing instructions are for use by service-trained personnel. To avoid dangerous electrical shock, do not perform
any servicing unless you are qualified to do so.
• BEFORE SWITCHING ON THE INSTRUMENT, the protective earth terminal of the instrument must be connected to
the protective conductor of the (mains) power cord. The mains plug shall be inserted only in an outlet socket that is
provided with a protective earth contact. This protective action must not be negated by the use of an extension cord
(power cable) that is without a protective conductor (grounding). Grounding one conductor of a two-conductor outlet is
not sufficient protection.
• If this instrument is to be energized via an auto-transformer (for voltage change), make sure the common terminal is
connected to the earth terminal of the power source.
• Any interruption of the protective (grounding) conductor (inside or outside the instrument), or disconnecting of the
protective earth terminal will cause a potential shock hazard that could result in personal injury.
• Whenever it is likely that the protective earth connection has been impaired, this instrument must be made inoperative
and be secured against any unintended operation.
• Only fuses with the required rated current, voltage, and specified type (normal blow, time delay, etc.) should be used.
Do not use repaired fuses or short-circuited fuseholders. To do so could cause a shock or fire hazard.
• Do not operate this instrument in the presence of flammable gases or fumes.
• Do not install substitute parts or perform any unauthorized modification to this instrument.
• Some procedures described in this manual are performed with power supplied to the instrument while its protective
covers are removed. If contacted, the energy available at many points may result in personal injury.
• Any adjustment, maintenance, and repair of this instrument while it is opened and under voltage should be avoided as
much as possible. When this is unavoidable, such adjustment, maintenance, and repair should be carried out only by a
skilled person who is aware of the hazard involved.
• Capacitors inside this instrument may hold a hazardous electrical charge even if the instrument has been disconnected
from its power source.
SAFETY SYMBOLS.
Instruction manual symbol. The instrument will be marked with this symbol when it is necessary for you to refer to the
instruction manual in order to protect against damage to the instrument.
This sign indicates hazardous voltages.
This sign indicates an earth terminal (sometimes used in the manual to indicate circuit common connected to a ground
chassis).
The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like, which, if not correctly
performed or adhered to, could result in personal injury. Do not proceed beyond a WARNING sign until the
indicated conditions are fully understood and met.
The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like, which, if not correctly
performed or adhered to, could result in damage to or destruction of part or all of the product. Do not proceed
beyond a CAUTION sign until the indicated conditions are fully understood and met.
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