3B Scientific AC__DC Power Supply (Stabilized) 0-12 V, 3 A (230 V, 50__60 Hz) - Manual (Page 2)

Elwe Didactic GmbH ▪ Steinfelsstr. 5 ▪ 08248 Klingenthal ▪ Germany ▪ www.elwedidactic.com
3B Scientific GmbH ▪ Rudorffweg 8 ▪ 21031 Hamburg ▪ Germany ▪ www.3bscientific.com
Subject to technical amendments
© Copyright 2012 3B Scientific GmbH
• The instrument may only be connected to
the mains via a socket that has an earth
connection.
• Before making any connections, check the
experiment leads for damaged insulation
and exposed wires.
• Replace any blown fuses only with new
ones that match the specifications stated on
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 and heat sink at
the rear of the housing. These are neces-
sary in order to ensure sufficient circulation
of air required for cooling the components
inside the equipment.
• The equipment may only be
opened/repaired by qualified and trained
personnel.
2. Description
The AC/DC power supply provides a continu-
ously adjustable, stabilised AC or DC voltage for
student exercises and experiments. Either AC or
DC output voltage is selected by means of a
toggle switch.
The power supply 1001006 is for operation with
a mains voltage of 115 V (±10%), and the unit
1001007 is for operation with a mains voltage of
230 V (±10%).
3. Technical data
Mains supply voltage: see back panel
Output voltages:
0 – 12 V
Output current: 2 – 8 V, 2 A
8 – 10 V, 3 A
10 – 12 V, 4 A
Output resistance: 50 mΩ approx.
Fuse rating: 4 A
Connections: 4 mm safety sockets
Dimensions: 162x170x68 mm 3 approx.
Mass: 2.9 kg approx.
4. Operation
It is recommended to use one of the following
instruments to measure the output voltage:
Analogue Multimeter AM50
1003073
or
Analogue Multimeter AM51 1003074
Caution:
The AC and DC outputs cannot be used at the
same time.
4.1 Obtaining an AC voltage
• Connect the unit to the mains supply. Turn
the voltage control knob fully to the left.
• Connect the load to the AC output sockets.
• Set the toggle switch to AC.
• Press the mains switch; the mains indicator
light shows green.
• Set the required voltage using the voltage
control; if necessary, connect a voltmeter in
parallel with the load.
4.2 Obtaining a DC voltage
• Connect the unit to the mains supply. Turn
the voltage control knob fully to the left.
• Connect the load to the DC output sockets.
• Set the toggle switch to DC.
• Press the mains switch; the mains indicator
light shows green.
• Set the required voltage using the voltage
control; if necessary, connect a voltmeter in
parallel with the load.
4.3 Changing the fuse
• Before changing the fuse, unplug the unit
from the mains.
• Using a screwdriver (or similar tool), un-
screw and lift out the fuse holder.
• Replace the fuse with a new one with the
same specifications.
• Screw the fuse holder back into place.
5. Care and maintenance
• Before cleaning the equipment, disconnect it
from its power supply.
• Use a soft, damp cloth to clean it.
6. Disposal
• The packaging should be disposed of at
local recycling points.
• Should you need to dispose of the equip-
ment itself, never throw it away in normal
domestic waste. Local regulations for the
disposal of electrical equipment will apply.