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1680-Series Quick Start/Installation 25
Safety Notices
This apparatus has been designed and tested in accordance with IEC
Publication 1010, Safety Requirements for Measuring Apparatus, and has been
supplied in a safe condition. This is a Safety Class I instrument (provided with
terminal for protective earthing). Before applying power, verify that the
correct safety precautions are taken (see the following warnings). In addition,
note the external markings on the instrument that are described under "Safety
Symbols."
Warnings
• Before turning on the instrument, you must connect the protective earth
terminal of the instrument to the protective conductor of the (mains) power
cord. The mains plug shall only be inserted in a socket outlet provided with
a protective earth contact. You must not negate the protective action by
using an extension cord (power cable) without a protective conductor
(grounding). Grounding one conductor of a two-conductor outlet is not
sufficient protection.
• 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 fuse holders. To do so could cause a shock or fire hazard.
• If you energize this instrument by an auto transformer (for voltage
reduction or mains isolation), the common terminal must be connected to
the earth terminal of the power source.
• Whenever it is likely that the ground protection is impaired, you must make
the instrument inoperative and secure it against any unintended operation.
• Service instructions are for trained service personnel. To avoid dangerous
electric shock, do not perform any service unless qualified to do so. Do not
attempt internal service or adjustment unless another person, capable of
rendering first aid and resuscitation, is present.
• Do not install substitute parts or perform any unauthorized modification to
the instrument.
• Capacitors inside the instrument may retain a charge even if the
instrument is disconnected from its source of supply.