LORENZ MESSTECHNIK GmbH
Obere Schloßstr.131
73553 Alfdorf
07172 / 93730-0
Fax 07172 /93730-22
E-Mail: [email protected]
Technical changes reserved
090327.docx
Internet:
www.lorenz-sensors.com
Page 10 of 12
6.4.1 Natural Resonances
Estimate of the mechanical natural frequencies:
2
1
0
1
1
2
1
J
J
c
f
f
0
J
1
, J
2
c
= Natural Frequency in Hz
= Moment of Inertia in kg*m²
= Torsional Rigidity in Nm/rad
Further methods for the calculation of natural resonances are corresponding purchasable programs or
books (e.g. Holzer-Procedure, Dubbel, Taschenbuch für den Maschinenbau, Springer Verlag)
An operation of the device in natural resonance can lead to permanent damages.
6.5
Speed Limits
The maximum speed indicated in the data sheet may not be exceeded in any operating state..
6.6
Disturbance Variables
By disturbances, measured value falsifications can occur by
Vibrations,
Temperature gradients,
Temperature changes,
Arising disturbance variables during operation, e.g. imbalance,
Electrical disturbances,
Magnetic disturbances,
EMC (electromagnetic disturbances),
Therefore avoid these disturbance variables by decoupling of vibrations, covers, etc.
7
Maintenance
7.1
Maintenance Schedule
Action
Frequency
Date
Date
Date
Control of cables and connectors
1x p.a.
Calibration
< 26 months
Control of fixation (flanges, shafts)
1x p.a.
Have bearings exchanged by Lorenz
Messtechnik GmbH
20000 hrs
operating time
c
J
1
J
2
