Omega Products TQ 503 Installation Manual
Operating Instructions
Rotary Torque Transducer
Model TQ 503 (with standard square connections)
Model TQ 503 X (including rangle measurement)
Model TQ 503 R (with shaft ends)
Operating Instructions no. 1333
Model TQ 503
Operating Instructions no. 1333
Page 1 / 17
Contents
1. Contents
2. Application and key features
3. Description
3.1 Mechanical design
3.2 Electrical design
3.3 Rotation angle measuring system (only version X)
4. Electrical connections
4.1 Description of interfaces
4.2 Installing the signal lead
5. Using the torquemeter
5.1 Version Q, X
5.2 Version R
6. Static calibration
6.1 Making a simple calibration device
6.2 Calculation example for lever arm length
7. Maintenance
8. Repairs
See datasheet for technical details.
Operating Instructions no. 1333
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2. Application and key features
· Torquemeter with strain gauges
· Signal transfer by sliprings
· Measurement of constant and variable torque
· Measurement of torque from the rotating shaft
· Integrated system for rotation angle measurement (only version X)
· Suitable for laboratory use and quality control
· Ideal for use with power tools
· Primarily suitable for low speed ranges
· Suitable for momentary measurement of torque (intermittent duty)
Operating Instructions no. 1333
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3. Description
3.1 Mechanical design
Torquemeters type SD comprise a rotating shaft mounted on bearings inside a housing. The shaft has a
necked section - called the torsion zone - to which strain gauges are attached and connected in a full
bridge circuit. Sliprings and brushes provide the link between rotor and housing with two sliprings
carrying the electric power supply to the strain gauges on the rotating shaft. Two other sliprings serve to
transfer the measuring signals from the rotating shaft to the stationary housing. The full bridge circuit is
connected directly through the sliprings and brushes to the lead connector which is mounted on the
housing of the torquemeter.
In version X torquemeters an optical rotation angle measurement system is integrated. It consists of a
pulse disk on the rotating shaft with 360 light-dark stripes. Two light barriers are installed into the stator.
Inside the torquemeter there is a small electronics for processing of the angle pulses.
Square socket
(version Q / X)
or hexagon socket
(version H)
or shaft end with
feather key slots
(version R)
Shaft
Bearing
Brushes
Slip rings
Lead connector
Rotation angle
measuring system
(only version X / HA)
Housing
Square end
(version Q / X)
or hexagon end
(version H)
or shaft end with
feather key slots
(version R)
Bearing
Strain gauges
Torsion zone
Operating Instructions no. 1333
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3.2 Electrical design
Shield
R4R3
R2 R1
S4S3S2S1
Version Q, R, H:
Version QA:
Version H
(special design):
U
B
R1 ... R4 = Gauges for measuring mechanical strain
S1 ... S4 = Sliprings with brushes
Signal leads
654213
KDCBAM
FDCBAE
Calibration
voltage
Operating Instructions no. 1333
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3.3 Rotation angle measuring system (only version X)
3
2
1
3
+5V0V
FEHG
Diagram showing the design of the rotation angle measuring system
1 rotating shaft
2 pulse disk
3 forked light barrier with LED and photo diode
0 V
4
4 operation amplifier
Features
- 360 light-dark stripes on the pulse disk
- two forked light barriers shifted by phase angle 90°
- pulse number proportional to the rotation angle
Operating Instructions no. 1333
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