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.
