3B SCIENTIFIC PHYSICS U189021 Instructions D'utilisation page 7

3B SCIENTIFIC ® PHYSICS
Instruction manual
02/10 ALF
1. Safety instructions
The permanent magnets can generate considerable
forces of attraction and repulsion with the result that
there is a risk of squashing or splintering.
•
Be especially cautious when inserting magnets
into the basic unit.
•
Never use the magnets except as specified.
Magnetic fields can erase data from magnetic media
and affect or destroy electronic or mechanical com-
ponents like heart pacemakers.
•
People with pacemakers should not conduct this
experiment.
2. Description
The NMR supplement set is to be used with the
ESR/NMR basic set (U188031) for investigating nuclear
spin resonance in glycerine, polystyrene and Teflon.
The set consists of an NMR probe with a high-
frequency coil, a strong and uniform permanent
NMR Supplementary Set U189021
1
1a Magnet
1b Yoke
2
3
4
5
6
7
magnet, a glycerine sample, a polystyrene sample, a
Teflon sample, an empty comparison sample and
two discs for assembling the apparatus.
3. Technical data
Magnetic flux of
permanent magnets:
Frequency range:
4. Maintenance and storage
•
Remove any debris from the surfaces of the
permanent magnet poles using a cloth with
some isopropanol.
•
Keep permanent magnets in a dry place.
1
Magnet unit
Discs for assembly
NMR probe
Polystyrene sample
Comparison sample
Glycerine sample
Teflon sample
300 mT approx.
11 • 15 MHz approx.