3B Scientific Teltron NMR Supplementary Set User Manual

Page 2

6. Equipment required in addition

1 ESR/NMR basic set (230 V, 50/60 Hz) 1000638

1 ESR/NMR basic set (115 V, 50/60 Hz) 1000637

1 Analogue oscilloscope, 2x30 MHz 1002727

2 High-frequency cables

1002746

alternatively
1 3B NETlog™ unit (230 V, 50/60 Hz) 1000540

1 3B NETlog™ unit (115, 50/60 Hz) 1000539

1 3B NETlab™ 1000544

2 High-frequency cables, BNC/4-mm plug 1002748

1 PC

7. Operation

7.1 Assembly of the basic unit
The discs, the pole surfaces of the magnets and

the probe chamber in the basic unit must all be

free of grease, dust and debris.
• If necessary they should be cleaned using

isopropanol.

• Insert the discs into both sides of the sample

chamber (see Fig. 1).

Fig. 1 Sample chamber with assembly discs inserted

• Twist the metal rod into the yoke of the

magnet unit. Place the magnet unit in the

clip on the basic unit as shown in Fig. 2.

• Take the magnet unit in both hands and push

the yoke downwards with your thumbs (see

Fig. 3).

• Push the coils over the magnets, making

sure the direction if the windings is the

same. The embossed arrows on the coils

must point in the same direction.

• Clean any grit or metal shavings off the two

magnets with a cloth.

• Move the completed magnetic unit onto the

assembly discs, making sure to carry out the

steps that follow: (see Fig. 4).

• Separate the two coils with your hands, pull-

ing them outwards to increase the gap be-

tween them. You can rest your hands on the

knurled screws while doing this. Push the

magnets about a quarter of the way onto the

assembly discs (see Fig. 4).

• Push back the two discs with your thumbs and

pull on the coils to move the magnet supports

into their end positions (see Fig. 5).

• Tighten both knurled screws by hand at the

same time. Make sure that the magnets are

accurately aligned on top of the assembly

discs. If necessary, slot the discs all the way

back into the probe chamber and then push

the magnet supports into their end positions.

Fig. 2 Permanent magnet inserted into basic unit

Fig. 3 Removing the yoke from the permanent mag-

net

Fig. 4 Pulling the two permanent magnets apart