HBM T40B Mounting Instructions page 20

20
5. Then align the antenna to the rotor in such a way that the antenna
encloses the rotor more or less coaxially and the antenna wire in the axial
direction shows the position as the center of the transmitter winding on the
rotor.
To make this alignment easier, the antenna segment and the transmitter
winding on flange B have the same width. Please comply with the permiss­
ible alignment tolerances stated in the specifications.
Fig 4.4: Alignment of the rotor with the stator
6. Now fully tighten the bolted stator housing connection.
Prevention of stator axial oscillation
Depending on the operating conditions, the stator may be induced to oscillate.
This effect is dependent on:
 the rotational speed,
 the antenna diameter (depends in turn on the measuring range),
 the design of the machine base.
Important
To prevent this axial oscillation, the antenna ring requires additional support
by the customer. There is a socket (with an M5 internal thread) on the upper
antenna segment, which can be used for a suitable clamping device (see
Fig 4.5).
If this is the case, the cable plug also needs some support, as shown in the
construction example in Fig 4.6.
HBM
T40B
A3452-4.0 en/de