HBM T40B, Mounting Instructions, Page: 27 / 164

Mechanical installation
T40B
A03452_15_X00_00 HBM: public
25
Important
To make sure that they function perfectly, the fan‐type lock washers (A5.3-FST
DIN 6798 ZN/galvanized) must be replaced after the bolted antenna connec­
tion has been loosened three times.
4. Now tighten all the bolted antenna segment connections with a tightening
torque of 5 N
⋅
m.
5. Rotational speed measurement without a sensor for the reference signal
(zero index):
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 same position as the center of the transmitter winding on the
rotor.
Fig. 5.4 Alignment of the rotor with the stator (without a reference signal sensor)
Rotational speed measurement with a sensor for the reference signal (zero
index):
Tilt the stator slightly ( see Fig. 5.5, left ), so that the bracket with the sensor
head for the reference signal (zero index) is between the two flanges. Now
tip the stator over the rotor until the antenna ring completely covers the
flange with the transmitter winding (
see Fig. 5.5, right ).