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3B SCIENTIFIC
AC/DC power supply unit 0-20 V/5 A U8521131
Instruction sheet
02/08 SP/ALF
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1. Safety instructions
The 0-20 V/5 A AC/DC power supply unit conforms to
all safety regulations for electrical measuring, control,
monitoring and laboratory equipment, as specified
under DIN EN 61010, Section 1, and the equipment
has been designed to meet protection class I. It is
intended for operation in a dry environment, suitable
for the operation of electrical equipment and sys-
tems.
Safe operation of the equipment is guaranteed, pro-
vided it is used correctly. However, there is no guar-
antee of safety if the equipment is used in an im-
proper or careless manner.
If it may be assumed for any reason that non-
hazardous operation will not be possible (e.g. visible
damage), the equipment should be switched off im-
mediately and secured against any unintended use.
In schools and other educational institutions, the
operation of the AC/DC power supply unit must be
supervised by qualified personnel.
•
Before using the AC/DC power supply unit for the
first time, confirm that the specifications printed
on the rear side of the housing are compatible
with the local mains voltage.
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PHYSICS
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Before using the AC/DC power supply unit for the
first time, check the housing and the mains lead
for any damage. In the event of any malfunc-
tion/operational defect or visible damage, switch
off the unit immediately and secure it against un-
intended use.
•
The instrument may only be connected to the
mains via a socket that has an earth connection.
•
Before making any connections, check the ex-
periment leads for damaged insulation and ex-
posed wires.
•
Replace a faulty fuse only with one matching the
specifications stated at the rear of the housing.
•
Disconnect the equipment from the mains before
replacing a fuse.
•
Never short the fuse or the fuse holder.
•
Never cover the air vents in the housing. This is
necessary in order to ensure sufficient circulation
of air required for cooling the internal compo-
nents of the equipment.
•
The equipment may only be opened/repaired by
qualified and trained personnel.
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1 ON/OFF switch
2 DC voltage output
3 DC current display
4 DC current regulator with cur-
rent limit display
5 DC voltage regulator with volt-
age limit display
6 DC voltage display
7 8-way switch for AC voltage
8 Overload protection switch
9 AC voltage output
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