Lorenz DR-1986 User manual

LORENZ MESSTECHNIK GmbH
Obere Schloßstr.131
73553 Alfdorf
07172 / 93730-0
Fax [phone]
E-Mail: [e-mail]
Technical changes reserved
090327.docx
Internet: www.lorenz-sensors.com
Page 1 of 12
Operation Manual
for Torque Sensors
For below and similar Types
DR-1986
DR-1987
DR-1988
DR-2124

LORENZ MESSTECHNIK GmbH
Obere Schloßstr.131
73553 Alfdorf
07172 / 93730-0
Fax [phone]
E-Mail: [e-mail]
Technical changes reserved
090327.docx
Internet: www.lorenz-sensors.com
Page 2 of 12
Imprint
Manufacturer, Place
Lorenz Messtechnik GmbH, D-73553 Alfdorf.
Valid for...
DR-1986; DR-1987; DR-1988; DR-2124
Copyright
© 2012 Lorenz Messtechnik GmbH, Alfdorf.
Reprint Interdiction
Reprints, even in extracts, only with written authority.
Modification
Technical changes reserved.
References in this Text
1.6 Warning Notes; Page 4
Attention must be paid to the accident prevention regulations of the trade associations.
Coverings and casings are necessary before operating the sensor. This is also valid for
commissioning, maintenance and trouble shooting.
Duties of the coverings and casings are:
Protection from detaching parts
Protection from contusion and shear
Prevention from reaching rotating parts
Prevention from being tangled up and/or getting caught by parts
Coverings may
Not grind
Not rotate
Coverings are also necessary outside of operating and motion travel areas of persons.
These demands can be modified if other sufficient safety devices are available. During operation,
the safety precautions must be operative. By vibrations, damages can occur at the device.
4 Mechanical Assembly; Page 7
It must be ensured that no materials (e.g. liquids, gases) from other components of the spindle get
into the torque sensor.
Before the assembly, spline drive (or square drive) must be cleaned with dissolver (e.g. acetone)
and lightly greased, no foreign particles may adhere to them. The hub must fit corresponding to the
connection.
Caution: During the assembly inadmissibly large forces may not act on the sensor or the mechanical
connections. At small torques (< 50 N·m) connect the sensor electrically during the assembly and
observe the signal, the measurement signal may not exceed the limit values.
6 Measuring; Page 9
Warming-up period of the torque sensor is approx. 5 min.
6.4.1 Natural Resonances; Page 10
An operation of the device in natural resonance can lead to permanent damages.

LORENZ MESSTECHNIK GmbH
Obere Schloßstr.131
73553 Alfdorf
07172 / 93730-0
Fax [phone]
E-Mail: [e-mail]
Technical changes reserved
090327.docx
Internet: www.lorenz-sensors.com
Page 3 of 12
Contents
1Read First.............................................................................................................................................. 4
1.1 Safety and Caution Symbols.......................................................................................................... 4
1.2 Intended Use.................................................................................................................................. 4
1.3 Dangers.......................................................................................................................................... 4
1.3.1 Neglecting of Safety Notes ..................................................................................................... 4
1.3.2 Remaining Dangers ................................................................................................................ 4
1.4 Reconstructions and Modifications ................................................................................................ 4
1.5 Personnel ....................................................................................................................................... 4
1.6 Warning Notes ............................................................................................................................... 4
2Term Definitions .................................................................................................................................... 5
2.1 Terms ............................................................................................................................................. 5
3Product Description ............................................................................................................................... 5
3.1 Mechanical Setup........................................................................................................................... 5
3.2 Electrical Setup .............................................................................................................................. 6
3.2.1 Sensors with Analog Output ................................................................................................... 6
4Mechanical Assembly............................................................................................................................ 7
5Electrical Connection............................................................................................................................. 8
5.1 Pin Connection............................................................................................................................... 8
5.1.1 Standard Version .................................................................................................................... 8
5.2 Calibration Control ......................................................................................................................... 8
5.2.1 Calibration Control at Analog Output ...................................................................................... 8
5.3 Cable.............................................................................................................................................. 8
5.4 Shielding Connection ..................................................................................................................... 9
5.5 Running of Measuring Cables........................................................................................................ 9
5.6Angle (Option) ................................................................................................................................ 9
6Measuring.............................................................................................................................................. 9
6.1 Engaging ........................................................................................................................................ 9
6.2 Direction of Torque......................................................................................................................... 9
6.3 Static / Quasi-Static Torques ......................................................................................................... 9
6.4 Dynamic Torques ........................................................................................................................... 9
6.4.1 Natural Resonances ............................................................................................................. 10
6.5 Speed Limits ................................................................................................................................ 10
6.6 Disturbance Variables .................................................................................................................. 10
7Maintenance........................................................................................................................................ 10
7.1 Maintenance Schedule ................................................................................................................ 10
7.2 Trouble Shooting.......................................................................................................................... 11
8Decommission..................................................................................................................................... 11
9Transportation and Storage ................................................................................................................ 11
9.1 Transportation .............................................................................................................................. 11
9.2 Storage......................................................................................................................................... 11
10 Disposal ........................................................................................................................................... 12
11 Calibration........................................................................................................................................ 12
11.1 Proprietary Calibration.............................................................................................................. 12
11.2 DKD-Calibration........................................................................................................................ 12
11.3 Re-Calibration........................................................................................................................... 12
12 Data Sheet....................................................................................................................................... 12
13 Literature.......................................................................................................................................... 12

LORENZ MESSTECHNIK GmbH
Obere Schloßstr.131
73553 Alfdorf
07172 / 93730-0
Fax [phone]
E-Mail: [e-mail]
Technical changes reserved
090327.docx
Internet: www.lorenz-sensors.com
Page 4 of 12
1 Read First
1.1 Safety and Caution Symbols
Caution:
Injury Risk for Persons
Damage of the Device is possible.
Note:
Important points to be considered.
1.2 Intended Use
Torque sensors are intended for the measurement of torques. This measurand is further suitable for
control tasks. The valid safety regulations should be absolutely respected. The torque sensors are not
safety components in the sense of the intended use. The sensors need to be transported and stored
appropriately. The assembly, commissioning and disassembling must take place professionally.
1.3 Dangers
The torque sensor is fail-safe and corresponds to the state of technology.
1.3.1 Neglecting of Safety Notes
At inappropriate use, remaining dangers can emerge (e.g. by untrained personnel). The operation manual
must be read and understood by each person entrusted with the assembly, maintenance, repair,
operation and disassembly of the torque sensor.
1.3.2 Remaining Dangers
The plant designer, the supplier, as well as the operator must plan, realize and take responsibility for
safety-related interests for the sensor. Remaining dangers must be minimized. Remaining dangers of the
torque measurement technique must be pointed out.
Human mistakes must be considered. The construction of the plant must be suitable for the avoidance of
dangers. A danger-analysis for the plant must be carried out.
1.4 Reconstructions and Modifications
Each modification of the sensors without our written approval excludes liability on our part.
1.5 Personnel
The installation, assembly, commissioning, operation and the disassembly must be carried out by
qualified personnel only. The personnel must have the knowledge and make use of the legal regulations
and safety instructions.
1.6 Warning Notes
Attention must be paid to the accident prevention regulations of the trade associations.
Coverings and casings are necessary before operating the sensor. This is also valid for
commissioning, maintenance and trouble shooting.
Duties of the coverings and casings are:
Protection from detaching parts
Protection from contusion and shear
Prevention from reaching rotating parts
Prevention from being tangled up and/or getting caught by parts
Coverings may
Not grind
Not rotate
Coverings are also necessary outside of operating and motion travel areas of persons.
These demands can be modified if other sufficient safety devices are available. During
operation, the safety precautions must be operative. By vibrations, damages can occur
at the device.

LORENZ MESSTECHNIK GmbH
Obere Schloßstr.131
73553 Alfdorf
07172 / 93730-0
Fax [phone]
E-Mail: [e-mail]
Technical changes reserved
090327.docx
Internet: www.lorenz-sensors.com
Page 5 of 12
2 Term Definitions
2.1 Terms
Measuring Side:
Mechanical connection of the torque sensor in which the torque to be measured is applied. Usually this
side has the smallest moment of inertia.
Drive Side:
Mechanical connection of the torque sensor on the opposite side of the measuring side, usually with the
largest moment of inertia. At static torque sensors the housing is fastened on this side.
3 Product Description
The sensor measures following static and dynamic measurements:
Torque
Speed
Angle
The installation position of the torque sensor can be chosen freely.
Caution: it is to be differentiated between measuring side and drive side, see data sheet of the sensor:
http://www.lorenz-sensors.com
3.1 Mechanical Setup
The sensors consist of a torsion shaft. Depending on design, the mechanical connection possibilities are
executable with spline drive or square drive etc. The torsion shaft, applied with two strain gauge full
bridges, is bedded in a housing through ball bearings. For the signal transmission and/or the supply of the
strain gauge full bridges, a rotating transformer, according to the principle of a transformer, is arranged in
the sensor. For supply and measuring signal conditioning, electronics are integrated in the stator and the
rotor.
Schematical Drawing of the Mechanical Setup
SG
Rotating transformer
Shaft
Measuring side
Drive side
Electronics in the stator
Angle Sensor
Electronics in the rotor