3B Scientific Heating chamber (115 V, 50__60 Hz) - Manual (Page 2)

Elwe Didactic GmbH ▪ Steinfelsstr. 5 ▪ 08248 Klingenthal ▪ Germany ▪ www.elwedidactic.com
3B Scientific GmbH ▪ Rudorffweg 8 ▪ 21031 Hamburg ▪ Germany ▪ www.3bscientific.com
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© Copyright 2012 3B Scientific GmbH
2. Description
The heating chamber can be employed to con-
duct the Franck-Hertz experiment or the sodium
resonance fluorescence experiment in safety.
It consists of a powder-coated sheet steel cas-
ing with two viewing windows. The front plate is
attached via six knurled screws.
The chamber is heated via a tubular heating
element in the chamber floor. Temperature
measurement and regulation is carried via an
integrated micro-controller and a PT 100 ther-
mocouple. A digital temperature display allows
you to read off the temperature set-point and the
actual temperature value. The “SET” button can
be used to toggle the display between ° Celsius
and ° Fahrenheit. The “+/-” keys allow you to set
the set-point for the temperature in steps of 1 K.
There is an opening at the top with a spring clip
for holding a thermometer and a thermally insu-
lated carrying handle.
The heating chamber can accommodate both the
Franck-Hertz tube with Hg filling and the sodium
fluorescence tube on furnace wall (1000913).
The heating chamber 1006796 is for operation
with a mains voltage of 115 V (±10%), and the
unit 1012820 is for operation with a mains voltage
of 230 V (±10%).
3. Technical data
Mains voltage: See back of case
Dimensions of front
opening: 230 x 160 mm² approx.
Heating power: 800 W (230 V, 50/60 Hz)
400 W (115 V, 50/60 Hz)
Maximum temperature: 300° C (230 V, 50/60 Hz)
250° C (115 V, 50/60 Hz)
Temperature constancy: ±1° C approx.
Dimensions:
335x180x165 mm³ approx.
Weight: 5.6 kg approx.
4. Operation
• Attach the front plate holding the Frank-
Hertz tube with mercury filling or the sodium
resonance fluorescence tube to the open
side of the heating chamber and secure it in
place with the 6 knurled screws.
• Set up the corresponding circuit for the ex-
periment to be conducted.
• Turn on the heating chamber.
• Use the “SET” button to choose between a
temperature display in ° Celsius or ° Fahrenheit.
• Use the “+/-” keys to set the desired tem-
perature set-point.
The actual temperature (T-actual) is display on the
top line of the display, while the set temperature
(T-nominal) is shown on the bottom line. The most
recent set-point will be saved when the equipment
is turned off so that it is ready to be used again
when the equipment is next turned on.
5. Care and maintenance
• Before cleaning the equipment, disconnect it
from its power supply.
• Use a soft, damp cloth to clean it.
6. Disposal
• The packaging should
be disposed of at local
recycling points.
• Should you need to
dispose of the equip-
ment itself, never throw
it away in normal do-
mestic waste. Local
regulations for the dis-
posal of electrical
equipment will apply.
Fig. 1 Heating Chamber with Franck-Hertz tube with
Hg filling (115 V: 1006794, 230 V: 1006795)
Fig. 2 Heating Chamber with sodium fluorescence
tube (1000913)