General Information; Changing The Fuse - 3B SCIENTIFIC PHYSICS U33300 Instrucciones De Uso

2. Description
The transformer with rectifier provides small volt-
ages, switchable in four voltage steps, with outputs
in the form of AC voltages or full-wave rectified DC
voltages.
The maximum load for each output is 3 A. Both
outputs are protected against short-circuiting.
The U33300-115 transformer is for operation with a
mains voltage of 115 V (±10%), and the U33300-230
unit is for operation with a mains voltage of 230 V
(±10%).
3. Technical data
Mains voltage:
Output voltage:
Maximum load:
Primary fuse:
Terminals:
Dimensions:
Weight:
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany •
see rear of housing
3 / 6 / 9 / 12 V AC/DC
3 A
see rear of housing
4 mm safety sockets
3
210x170x90 mm ap-
prox.
2.6 kg approx.
Subject to technical amendments
© Copyright 2008 3B Scientific GmbH
4. Operation

4.1 General information

•
The AC and DC outputs cannot be used at the
same time
•
Before connecting the plug to the power sup-
ply, set the voltage selector switch to zero.
4.2 Obtaining an AC voltage
•
Connect the load to the AC output sockets (1).
•
Set the voltage selector switch (3) to give the
required voltage; if necessary connect a volt-
meter in parallel with the load.
•
Connect the unit to the mains supply.
4.3 Obtaining a DC voltage
•
Connect the load to the DC output sockets (2).
•
Set the voltage selector switch (3) to give the
required voltage; if necessary connect a volt-
meter in parallel with the load.
•
Connect the unit to the mains supply.

4.4 Changing the fuse

•
Unplug the mains plug.
•
Unscrew the fuse holder on the rear side of the
housing with a screwdriver.
•
Replace the fuse and reinsert the holder in its
socket.
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