3B Scientific High Voltage Power Supply 6 kV (115 V, 50__60 Hz) - Manual (Page 2)

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• The instrument may only be connected to
the mains via a socket that has an earth
connection.
• Do not connect multiple high-voltage power
supplies in series.
• Before making any connections, check the
experiment leads for damaged insulation and
exposed wires.
• Do not switch on the power supply before
the experiment set-up is finished and with
the voltage regulator turned all the way to
the left.
• Any changes to the circuit may only be
made with the power supply switched off.
• 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.
• Do not put anything on top of the power
supply, that could prevent natural air cooling
of the device.
• The equipment may only be opened/repaired
by qualified and trained personnel.
2. Description
Universal, floating, high-voltage source for all
electrostatic experiments and for operating
spectral tubes as well as other gas-discharge
tubes and electronic tubes.
Equipped with an integrated transformer which
is resistant to high-voltages and which allows a
tapping of the heating voltage for operating elec-
tronic tubes.
Continuously adjustable, non-hazardous high
voltage with passive current limiting and a digital
voltage display.
The power supply unit with the order number
1003141 is for mains supplies of 230 V (±10%)
while the one with order no. 1003140 is for 115 V
(±10%) systems.
3. Bedienelemente
Mains switch
If the light in the display goes
out, remove the mains cable
and check the fuse in the fuse
holder on the rear panel of the
device.
Voltage regulator 0
0 6000 V DC
Continuous regulation with
digital voltmeter to the right.
Note: The Voltmeter displays
the voltage at the output.
Heater voltage output
6.3 V AC output, max. load 3 A.
If the voltage disappears, and the
LED-display is still on, there has
been an overload. Turn off the
device - unscrew the FUSE-cap
and replace the fuse (3 A slow blow).
Digital display
LED, 3 digits
Continuous reading of the
adjusted voltage at the output
under load.
Note: If the load current is 1 mA, then the max.
output voltage is approx. 3 kV. This is caused by
the safety passive current limiter
WARNING: The display may show a
small value if a load is connected, even if the
regulator knob is turned fully cw for maximum
output. If the load is changed the output may
rise to 6 kV without any warning.
Chassis/ground/earth
The outputs are floating with respect
to ground. The
output or the
output may be connected to
chassis/ground/earth. Then the digital LED-
display will be more stable.
Caution : Do not connect another high
voltage (more than 500 V DC) between any of
the outputs and chassis/ground/earth!!! - or the
internal transformer will be permanently dam-
aged.
High voltage output
0 ... 6000 V DC, max 2 mA
load
Continuously adjustable.
Outputs are floating and the
positive or the negative
output should be connected
to the chassis/ground/earth.
An external voltage of
maximum 500 V DC may be added between any
of the outputs and chassis/ground/earth.