User's Manual

Mechanical installation
T40FH A4429-1.0 HBM: public 29
Make sure that the fan-type lock washers are inserted
between the antenna segments (these ensure that
there is a defined contact resistance)!
Important
To guarantee that they function perfectly, the fan-type
lock washers (A5, 3-FST DIN 6798 ZN/galvanized) must
be replaced after the bolted antenna connection has
been loosened three times.
4. Now tighten all the bolted antenna segment connec
tions with a tightening torque of 5 N⋅m.
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 has the
same position as the center of the transmitter winding
on the rotor.
To make alignment easier, the outer edge of the stator
antenna segment and the outer edge of the stator
winding carrier should be on the same line (in align
ment). Conform to the permissible alignment toler
ances stated in the specifications.
6. Now fully tighten the bolted stator housing connection.
Prevention of axial stator oscillation
Depending on the operating conditions, stator oscillation
may be induced. This effect is dependent on:
S the rotational speed,
S the antenna diameter (depends in turn on the measur
ing range),
S the construction of the machine base.