3B SCIENTIFIC PHYSICS U33000 Mode D'emploi page 6

2. Description
The 0 – 500 V DC power supply provides four inde-
pendently adjustable DC voltages, and is especially
intended for operating electron tubes, including
Helmholtz coils.
The DC voltages are stabilised and regulated, float-
ing and galvanically isolated from one another,
short circuit proof and secure from external volt-
ages The output voltages are shown by four ana-
logue displays.
The DC power supply U33000-115 is for operation
with a mains voltage of 115 V (±10%), and the unit
U33000-230 is for operation with a mains voltage
of 230 V (±10%).
3. Technical data
500 V output:
Voltage:
Stability at full load:
Residual ripple:
50 V output:
Voltage:
Stability at full load:
Residual ripple:
8 V output:
Voltage:
Residual ripple:
Overload protection:
12 V output:
Voltage:
Residual ripple:
Overload protection:
Mains voltage:
Primary fuse:
Displays:
Terminals:
Power consumption:
Dimensions:
Weight:
0 - 500 V DC, max. 50 mA
≤
0.01 % ± 100 mV
≤
20 mV
0 - 50 V DC, max. 50 mA
≤
0.1 % ± 30 mV
≤
5 mV
0 - 8 V DC, max. 3 A
≤
0.1 % ± 30 mV
Thermal cut-out
0 - 12 V DC, max. 4 A
≤
0.1 % ± 30 mV
Thermal cut-out
see rear of housing
see rear of housing
analogue, class 2
4 mm safety sockets
50 VA
3
85x325x190 mm approx.
4 kg approx.
4.1 General information
•
Before switching on the DC power supply, set
all four 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 required voltages.
•
Before switching off the DC power supply, set
the 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. Examples of use
The DC power supply U33000 is especially suitable
for use as a voltage source with the following
tubes:
1. Electron tubes in the S and D tube ranges
Diode
Triode
Gas triode
Dual beam tube
Thomson tube S
2. Fine beam tube
3. Training oscilloscope
4. Dual pole tube
2
4. Operation
Tubes in the Tubes in the
S series D series
U185501 U191501
U18551 U19151
U18557 U19157
U18570 U19170
U18555
U8481420
U8481350
U8482350