3B Scientific High-Pressure Mercury Vapour Lamp User Manual

Page 2

Elwe Didactic GmbH • Steinfelsstr. 6 • 08248 Klingenthal • Germany •

www.elwedidactic.com

3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany •

www.3bscientific.com

Subject to technical amendments

2. Description

The high-pressure mercury vapour lamp serves as a
light source that emits light with a very high ultra-
violet content.

It consists of a mercury arc (a quartz arc tube with
sealed-in electrodes and containing mercury)
within a bulb of hard blackened glass that has a
tubular opening. A wire mesh screen inside the
tube serves to protect the mercury arc and provides
protection in case the glass shatters. The lamp is
mounted on a stem with an E27 lamp socket.
A transparent screen serves to protect the observer
from UV radiation. It is made of a special plastic
that absorbs almost all radiation throughout the
UV spectrum.

3. Equipment supplied

1 High-pressure mercury vapour lamp

1 Protective screen

4. Technical data

Power consumption:

125 W

Power supply:

Power should only be
provided via the control
unit for spectral lamps
(230 V or 115 V)

Wavelength range:

UV-A, UV-B, UV-C

Colour temperature:

4200 K

5. Operation

To carry out the experiments, the following equip-
ment is also needed:

Control Unit for Spectral Lamps (230 V, 50/60 Hz)

U21905-230

or
Control Unit for Spectral Lamps (115 V, 50/60 Hz)

U21905-115

• Set up the experiment in such a way that the

observers are standing at right angles to the di-
rection of the light beam.

• Set up the protective screen directly beside the

lamp so that the observers are protected from
light that is radiated sideways from the lamp.

• After the experiment, allow the high-pressure

mercury vapour lamp to cool.

• Do not operate the high-pressure mercury

vapour lamp continuously for longer than
10 minutes.

• Allow a break of at least 10 minutes between

successive periods of operation, as a lamp that
is still warm after operation will not work if
switched on again. If necessary, accelerate the
cooling by blowing on the apparatus.

Fig. 1 Positioning of the protective screen in relation to the high-pressure mercury vapour lamp (view from above)