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3. Technical data
Filling gas:
Cathode dimensions:
Window:
Surface density:
Operating voltage:
Rel. gradient of plateau:
Dead-time:
Limiting resistance:
Overall dimensions:
Handling rod dimensions:
Mass:
Elwe Didactic GmbH • Steinfelsstr. 6 • 08248 Klingenthal • Germany •
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany •
Neon-argon mixture,
with
halogen
as
quenching agent
39x14 mm²
Mica, 9 mm Ø
1.5 – 2.0 mg/cm²
400 – 600 V (recom-
mended voltage: 500
V)
0.04%/V
90 µs
10 MΩ, built into the
housing
Approx. 85 mm x 25
mm Ø
100 mm x 10 mm Ø
Approx. 160 g
10 MΩ
Fig. 1. Schematic arrangement of the counter tube
Subject to technical amendments
© Copyright 2007 3B Scientific GmbH
4. Operation
Note:
The protective cap does not allow α-radiation to pass
through, and transmits β-radiation only partially.
Remove the protective cap when appropriate before
starting measurement. Replace the cap after each
use, taking care not to touch the mica window.
For carrying out experiments the following additional
equipment is recommended:
HF cable, 1 m
Digital counter (230 V, 50/60 Hz)
or
Digital counter (115 V, 50/60 Hz)
Geiger-Müller box
•
Connect the Geiger-Müller counter tube to a
digital counter through an HF cable.
•
Set up the counter tube so that the radiation falls
squarely on the mica window.
•
If appropriate, remove the plastic protective cap.
•
Set the required measurement time on the
counter.
•
Switch the audible counting signal on or off as
required.
•
Start the measurement.
•
After the measurement, replace the protective
cap.
400 V... 600 V
.
www.elwedidactic.com
www.3bscientific.com
U11255
U8533341-230
U8533341-115
U11391
220 pF
1 MΩ
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