BRUEL & KJAER 1022 Instructions And Applications page 23

2. Remove rear panel.
3. Loosen knurled lock-nut (Fig.4.5.) sufficiently for the outer and inner
cams to be moved relative to the one in the middle.
4. Set the pointer of the main scale to the lowest frequency of the desired
frequency range.
5. Turn the inner cam to the right (seen from behind) until the contact is
activated.
6. If necessary tighten the lock-nut a little so that the cam is not displaced
when the main scale pointer is moved.
7. Set the pointer of the main scale to the highest frequency within the
desired frequency range and turn the outer cam to the left until the
contact is activated. Be careful that the inner cam does not move.
8. The cam in the middle should be rotated so that it does not interfere with
the frequency range in use.
9. Tighten the lock-nut, still being careful that the cams do not move.
Cam Discs
Knurled Nut
Fig.4.5.
The adjustable cams
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