3B SCIENTIFIC PHYSICS U15300 Instrucciones De Uso página 6

2. Description
The Van de Graaff generator serves as a electrostatic
charge generator for high DC voltages (up to 100 kV)
with low current (not contact hazardous) for numer-
ous experiments in the area of electrostatics.
The Van de Graaff generator is made up of a base
plate on which the drive motor with controllable
speed and the acrylic glass insulator are mounted.
The detachable metal sphere with 4 mm socket, for
tapping voltage, is mounted on the insulator. The
rubber belt runs between the drive pulley and the
deflection pulley. The deflection pulley and the top
metal edge are height adjustable (only required for
retensioning the rubber belt). The metal edge is
connected to the metal rod on which the sphere is
mounted. The idler pulley and the bottom metal
edge with 4-mm socket are located above the drive
pulley. The conductor sphere on metal rod is used to
demonstrate the flashover.
The U15300-115 Van de Graaff generator is for op-
eration with a mains voltage of 115 V (±10%), and
the U15300-230 unit is for operation with a mains
voltage of 230 V (±10%).
3. Equipment supplied
1 Van de Graaff generator
1 Condutor sphere on rod
1 Mains power lead
1 Dust cover
4. Spare parts
Rubber belt for van de Graaff generator
5. Technical data
Voltage:
Short circuit current:
Drive motor:
Mains connection:
U15300-115:
U15300-230:
Power consumption:
Primary protection:
Dimensions:
Generator:
Metal sphere:
Conductor:
Height:
Weight:
Generator:
Conductor:
U15301
up to approx. 100 kV
15 µA
115 V, 50/60 Hz
230 V, 50/60 Hz
13 VA
fuse T 160 mA
3
240 x 190 x 620 mm
190 mm dia.
90 mm dia.
460 mm
5.8 kg
0.5 kg
6. Operation
6.1 General information
•
Before switching on the Van de Graaff generator
remove the metal sphere by lifting it straight up.
•
Clean the surface of the pulleys with warm water
and some dish washing liquid and dry them
thoroughly (with a hair dryer). Never use sol-
vents.
•
Align the metal edges as shown in Fig. 1. Posi-
tion them as close to the belt as possible without
touching it.
•
Put the metal sphere back on.
•
Ground the sockets at the bottom metal edge
and the conductor.
•
Switch on the drive motor and choose the drive
speed.
•
Move the conductor slowly to the metal sphere
to demonstrate charge balancing across a spark
gap.
•
In case of high humidity dry the Van de Graaff
generator with warm air (hair dryer).
4
2
1
Fig.1 Positioning the edges (1 Idler pulley, 2 Bottom metal
edge, 3 Top metal edge, 4 Deflection pulley)
6.2 Replacing the primary fuse
•
Pull the mains plug.
•
Pry out the insert with holder for the primary
fuse and spare fuse with a broad screw driver.
•
Check the data plate on base plate and replace
defective fuse using the spare fuse in the holder.
•
Place a new fuse in the holder for the spare fuse.
•
Put the insert back into its place.
6.3 Retensioning the rubber belt
•
Remove the metal sphere by lifting it straight
up.
2
3