3B SCIENTIFIC PHYSICS 1003312 User manual

3B SCIENTIFIC®PHYSICS
1
DC Power Supply 0 – 20 V, 0 – 5 A
1003311 (115 V, 50/60 Hz)
1003312 (230 V, 50/60 Hz)
Instruction sheet
08/22 HJB
1
Ventilation slots
2
Current and voltage display
3
LED display for constant current source (cc)
4
Current regulator
5
Earthing socket
6
DC voltage output
7
Fine regulator for DC voltage
8
Mains on/off switch
9
Coarse regulator for DC voltage g
10
LED display for constant voltage source (cv)
1. Safety instructions
The DC Power Supply 0 –20 V, 0 –5 A con-
forms to all safety regulations for electrical
measuring, control, monitoring and laboratory
equipment, as specified under DIN EN 61010,
Section 1, and the equipment has been de-
signed to meet protection class I. It is intended
for operation in a dry environment, suitable for
the operation of electrical equipment and sys-
tems.
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-
hazardous 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
supervised by qualified personnel.
Caution: the low-voltage output of the
power supply is not surge-proof if ex-
posed to external voltages of more
than 100 V with respect to earth.
When using the equipment in conjunction
with other power supplies, e.g. for operating
electron tubes, be careful that no voltages
in excess of 100 V with respect to earth are
present at the outputs.
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
malfunction/operational defect or visible
damage, switch off the unit immediately and
secure it against unintended use.
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 a faulty fuse only with one match-
ing 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.

3B Scientific GmbH ▪ Ludwig-Erhard-Str. 20 ▪ 20459 Hamburg ▪ Germany ▪ www.3bscientific.com
Subject to technical amendments
© Copyright 2022 3B Scientific GmbH
Never cover the air vents in the housing.
This is necessary in order to ensure suffi-
cient circulation of air required for cooling
the internal components of the equipment.
The equipment may only be opened/re-
paired 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 limita-
tion or as a constant current source with voltage
limitation. 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 volt-
age 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 mm3approx.
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 experi-
mental 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 lo-
cal 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.