3B SCIENTIFIC PHYSICS 1024239 Instruction Sheet

3B SCIENTIFIC ® PHYSICS
Transformer with Rectifier 3/6/9/12 V, 3 A
1024239 (115 V, 50/60 Hz)
1024240 (230 V, 50/60 Hz)
Instruction sheet
10/22 HJB
1. Safety instructions
The transformer with rectifier conforms to all
safety regulations for electrical measuring, con-
trol, monitoring and laboratory equipment, as
specified under DIN EN 61010, Section 1, and
the equipment has been designed to meet pro-
tection class II. It is intended for operation in a dry
environment, suitable for the operation of electri-
cal equipment and systems.
Safe operation of the equipment is guaranteed,
provided it is used correctly. However, there is no
guarantee of safety if the equipment is used in an
improper or careless manner.
If it may be assumed for any reason that non-hazard-
ous operation will not be possible (e.g. visible damage),
the equipment should be switched off immediately and
secured against any unintended use.
In schools and other educational institutions, the
operation of the power supply unit must be super-
vised by qualified personnel.
It is not permissible to cascade multiple
devices and short them out. This
causes overloading of the polyswitch.

Before using the 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.

Before using the 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 unintended use.

Before making any connections, check the
experiment leads for damaged insulation and
exposed wires.

Replace a faulty fuse only with one matching
the specifications stated at the rear of the
housing.

Disconnect the equipment from the mains be-
fore replacing a fuse.

Never short the fuse or the fuse holder.

The equipment may only be opened/repaired
by qualified and trained personnel.
2. Description
The transformer with rectifier provides small volt-
ages, switchable in four voltage steps, with out-
puts in the form of AC voltages or full-wave recti-
fied DC voltages.
The maximum load for each output is 3 A. Both
outputs are protected against short-circuiting.
1
1 AC voltage output
2 DC voltage output
3 Voltage selector switch