3B Scientific DC Power Supply 20 V, 5 A (115 V, 50__60 Hz) User Manual

Page 2

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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 connec-
tion.

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
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 circula-
tion of air required for cooling the internal
components of the equipment.

The equipment may only be opened/repaired
by qualified and trained personnel.


2. Description

The 0 – 20 V, 0 – 5 A DC power supply provides a
DC voltage up to 20 V and a DC current up to 5 A.

The output voltage and output current are con-
tinuously variable. The unit can be used either as a
constant voltage source with current limitation or
as a constant current source with voltage limita-
tion. When the cv LED is illuminated it shows that
the unit is operating as a constant voltage source,
whereas the cc LED shows that it is operating as a
constant current source. The output is protected
against short-circuiting.

The 1003311 DC power supply is for operation with
a mains voltage of 115 V (

±10%), and the 1003312

unit is for operation with a mains voltage of 230 V
(

±10%).


3. Technical data

Mains voltage:

see rear of housing

DC output:

0 – 20 V, 0 – 5 A

Output power:

100 W

Stability under full load:

0,01% + 5 mV,

0,2% + 5 mA

Residual ripple:

1 mV, 3 mA

Displays:

2 x 3 digit LED

Primary fuse:

see rear of housing

Terminals:

4 mm safety sockets

Dimensions: 130x150x300

mm

3

approx.

Weight:

4.7 kg approx.

4. Operation

4.1 General information

Before switching on the power supply, set the
current and voltage regulators to zero (turn
fully to the left).

Connect the power supply to the experimental
setup.

Do not switch the power supply on until the
experiment has been fully assembled.

Changes to the experimental setup must only
be made with the power supply switched off.

Set the current regulator to give the required
current.

Set the coarse and fine voltage regulators to
give the required voltage.

Before switching off the power supply, set the
current and voltage regulators to zero again
(turn fully to the left).

4.2 Changing the fuse

Turn off the power switch and 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.


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 equipment
itself, never throw it away in normal domestic
waste. Local regulations for the disposal of
electrical equipment will apply.

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