3B Scientific High-Pressure Mercury Vapour Lamp User Manual

3B SCIENTIFIC

High-Pressure Mercury Vapour Lamp U8473155

Instruction sheet

01/10 THL/ALF

®

PHYSICS

1 Window with wire mesh

screen
2 Tube
3 Mercury arc
4 Glass bulb
5 Connection cable with

multi-pin plug
6 Stem with E27 lamp socket
7 Power supply unit (not

included)
8 Protective screen

1. Safety instructions

The high-pressure mercury vapour lamp emits
ultra-violet light in the UV-A, UV-B and UV-C re­gions. However, the intensity of the radiation is so
low that, as long as the lamp is used properly, it
presents no risks to those conducting the experi­ments or any observers.

If there is reason to suspect that the lamp can no
longer be used safely (e.g., if any glass part is dam­aged), it must be taken out of service immediately.

• Only operate the high-pressure mercury va-

pour lamp with the recommended power sup­ply unit.

The high-pressure mercury vapour lamp is made of
glass and contains mercury. Therefore there is a
risk of breakage.

• Handle the lamp carefully and do not subject

it to any mechanical stress.

• If the quartz tube is broken, clean up the mer-

cury according to the correct procedure to pre­vent the escape of toxic mercury vapour.

• If it becomes necessary to dispose of the high-

pressure mercury vapour lamp, local regula­tions for such disposal must be observed.

UV radiation is damaging to the retina.

• Do not look into the direct light beam or a

reflected beam.

• Always position the safety screen between any

observers and the high-pressure mercury va­pour lamp.

• Switch off the lamp before changing the ex-

periment set-up.

During operation the body of the lamp will get hot
so that there is a risk of getting burned.

• Do not touch the body of the lamp after

switching on.

• After the experiment, leave 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.

Ozone is generated during the operation of the
high-pressure mercury vapour lamp.

• Ensure that there is adequate ventilation dur-

ing the experiment.

1

2. Description

The high-pressure mercury vapour lamp serves as a
light source that emits light with a very high ultra­violet 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 equip­ment 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 di­rection 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)

Elwe Didactic GmbH • Steinfelsstr. 6 • 08248 Klingenthal • Germany • www.elwedidactic.com

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Subject to technical amendments

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