3B SCIENTIFIC PHYSICS 3B ELWE U33010 User manual

3B SCIENTIFIC®PHYSICS
1
High Voltage Power Supply 5 kV U33010
Instruction sheet
02/08 ALF
1 Ventilation slots
2 Voltage display
3 High voltage output
4 Earthing socket
5 Heater voltage output
6 Mains on/off switch
7 Power on display (LED)
8 High voltage regulator
9 Carrying handle
1. Safety instructions
The 5 kV high voltage power supply conforms 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 designed to meet protection class I. It is
intended for operation in a dry environment, suit-
able for the operation of electrical equipment and
systems.
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. visi-
ble 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 super-
vised by qualified personnel.
•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 malfunc-
tion/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 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.

3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com
Subject to technical amendments
© Copyright 2008 3B Scientific GmbH
2. Description
The 5 kV high voltage power supply is a universally
usable non-earthed high voltage source for operat-
ing electron tubes.
It provides a continuously variable stabilized high
voltage with passive current limitation, in a hous-
ing that is safe to handle. It also incorporates a
transformer, insulated against high voltage, to
supply the cathode heater voltage for an electron
tube. A temperature-controlled fan protects the
equipment from overheating.
The U33010-115 high voltage power supply is for
operation with a mains voltage of 115 V (±10%),
and the U33010-230 unit is for operation with a
mains voltage of 230 V (±10%).
3. Technical data
Mains voltage: see rear of housing
High voltage output: 0 - 5000 V DC, max. 2 mA
Heater voltage output: 6.3 V AC, max. 3 A, high
voltage resistant up to 6
kV
Overload protection: Primary fuse: see rear of
housing
Secondary protection:
current-limiting resistors
Terminals: 4 mm safety sockets
High-voltage display: analogue
Dimensions: 235x130x155 mm3 ap-
prox.
Weight: 3.5 kg approx.
4. Operation
4.1 General information
•Before switching on the power supply, set the
high voltage regulator 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 high voltage regulator to give the re-
quired voltage.
•Before switching off the power supply, set the
high voltage regulator 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.