Rohde & Schwarz SR8000 Series, System Manual

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5300.9677.72 - 1.7 - EN-4
Chapter 1 Safety
4 Special Hazard Information
4.1 Hazards from AC Supply Voltage
All V
rms
> 30 V AC or V > 60 V DC voltages must be regarded as hazardous. When working
on voltages constituting a shock hazard, appropriate steps must be taken to exclude all
forms of risk. Working on live components is strictly forbidden. Work on live components is
only permitted in exceptional circumstances and in full compliance with special safety pre-
cautions.
4.1.1 AC Supply
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Ensure that the AC supply specifications for the system or instruments match the spec-
ifications of the local AC supply before connecting the equipment. The supply circuit
must always be protected by a fuse in order to give protection against overload and short
circuit.
Note Obtain the specifications from this documentation and also adhere to the breaking capacity
limits of the fuses and automatic cutouts in the transmitter.
4.1.2 Replacing Fuses
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Fuses in parts of instruments that can be accessed by users must only be changed
when disconnected from the power supply. As a matter of principle, replacement fuses
must comply with the specifications on the instrument labeling.
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Motor protection switches and automatic line fuses in those parts of a transmitter system
that can be accessed by users must be tripped. If their response range is adjustable, the
ex-factory setting must not be altered. If settings are changed inadvertently, the correct
values shown in this documentation must be set.
4.1.3 Emergency-Off System
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Transmitter racks may also be fitted with emergency-off buttons at the customer's re-
quest. These are disabled when the transmitter is delivered. It is the responsibility of the
operator to ensure that the operation of the emergency button complies with safety re-
quirements and that it is included in the emergency shutdown system of the facility. Any
emergency buttons that are not used as previously planned for emergency shutdown
purposes must be removed completely.
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Setting up a transmitter in which the emergency-off devices are disabled is not permit-
ted.
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The operator is responsible for ensuring that all these circuits are properly integrated
into the emergency-off system on-site. Any circuit that is not included in this scheme
must be labeled accordingly.