SKF MTx, Техническое руководство, Страница: 16 / 68

HARDWARE MTx
1 - 6 - 14 SKF Condition Monitoring Centre – Steyr
Fig. 3/11 ... Connection example
Parameters in software
1. Sensitivity:
The sensors sensitivity has to be named here.
2. Gain:
All sensors are supplied with 3,3 V. This value is halved to get a positive and negative signal
for acceleration. With the supported sensors a gain of 1 is necessary because they already
deliver
If the sensor delivers less than the signal can be amplified to gain a better
resolution.
If another sensor is used which e.g. delivers the signal can be amplified by 2.
But be aware, if the input exceeds the the ADC will stuck at his maximum and maybe
information will be lost without any error.
3.2.2. Rotation sensors
There is a possibility to connect three different types of rotation sensors to the MTx. As
mentioned the device provides rectangle signals where the pulses represent the rotation
velocity. The number of pulses to be one turn can be adjusted in software.
The rotation-input can measure up to 600 kHz input frequency no matter which input is
used.

Be careful: Frequencies higher than 600 kHz cause failure in measurement and further can
overload the controller.

Because of performance issuses a accuracy of ± 60 rpm is possible.
1 65 V 1

65 V
 
3 3

2
---------
V

1

65 V

=
0

7 V

1

65 V
