Magtrol TM 302, TMB Series, TM 303, TM 304, TM 305 User Manual

TM 300 Series

Via Paolo Uccello 4 - 20148 Milano
Tel [phone] Fax [phone] [e-mail] www.dspmindustria.it

In-Line Torque Transducers

User’s Manual

Purchase Record

Please record all model numbers and serial numbers of your
Magtrol equipment, along with the general purchase information.
The model number and serial number can be found on either
a silver identification plate or white label affixed to each unit.
Refer to these numbers whenever you communicate with a
Magtrol representative about this equipment.

Model Number: _____________________________

Serial Number: _____________________________

Purchase Date: _____________________________

Purchased From: _____________________________

While every precaution has been exercised in the compilation of this document to ensure
the accuracy of its contents, Magtrol, Inc./Magtrol SA assumes no responsibility for
errors or omissions. Additionally, no liability is assumed for any damages that may result
from the use of the information contained within this publication.

COPYRIGHT

Copyright ©2006–2008 Magtrol, Inc. All rights reserved.
Copying or reproduction of all or any part of the contents of this manual without the
express permission of Magtrol is strictly prohibited.

TRADEMARKS

LabVIEW™ is a trademark of National Instruments Corporation.
Microsoft® is a registered trademark of Microsoft Corporation.
National Instruments™ is a trademark of National Instruments Corporation.
Windows® is a registered trademark of Microsoft Corporation.

1st English Edition, rev. G– June 2011

Safety Precautions

Warning! in order to minimize risks, it is of utmost

importance to respect the current safety
standards When planning, configuring and
operating the torque measurement drive
train.

1. Make sure that all Magtrol electronic products are earth-grounded, to ensure personal safety
and proper operation.

2. Check line voltage before operating electronic equipment.

3. Make sure that all rotating parts are equipped with appropriate safety guards.

Note: Detailed information regarding safety guards can be found in Section

2.5 – Protective Systems.

4. Periodically check all connections and attachments.

5. Always wear protective glasses when working with rotating elements.

6. Never wear a necktie or baggy clothes when standing close to rotating elements.

7. Never stand too close or bend over the rotating drive chain.

i

Revisions to this Manual

The contents of this manual is subject to change without prior notice.

REVISION DATE

First English edition, revision G – June 2011

Date Edition Change Section(s)

20.06.11 1st Edition - rev. G Accuracy update for TMB 301 to 313

26.05.11 1st Edition - rev. F Overload limit updated

04.10.10 1st Edition - rev. E Added information regarding vertical installation of a TM/TMB 2.1.3

28.07.09 1st Edition - rev. D Added information regarding connection to an differential amplifier 2.7.3

10.09.08 1st Edition - rev. C Updated: Figure 2–3 Parastic Forces 2.2

12.18.07 1st Edition - rev. B New transducer model: TM 309

01.10.07 1st Edition - rev. A Added information regarding connection to non-Magtrol electronics. 2.7.3

1.3.1, 1.3.2

1.3.1, 1.3.2, 1.3.3

1.3.2, 2.2.1, 2.2.2
and 2.4.3

ii

Table of Contents

SAFETY PRECAUTIONS .........................................................................................................................I

REVISIONS TO THIS MANUAL ...............................................................................................................II

REVISION DATE .................................................................................................................................................................II

TABLE OF REVISIONS ......................................................................................................................................................II

TABLE OF CONTENTS ..........................................................................................................................III

TABLE OF FIGURES ........................................................................................................................................................ IV

PREFACE ................................................................................................................................................ V

PURPOSE OF THIS MANUAL ......................................................................................................................................... V

WHO SHOULD USE THIS MANUAL .............................................................................................................................. V

MANUAL ORGANIZATION ............................................................................................................................................. V

1. INTRODUCTION .................................................................................................................................1

1.1 GENERAL INFORMATION ........................................................................................................................................ 1

1.2 DESCRIPTION ............................................................................................................................................................. 1

1.3 DATA SHEETS ............................................................................................................................................................. 2

1.3.1 TM 301 – TM 308 ........................................................................................................................................... 2

1.3.2 TM 309 – TM 313 ........................................................................................................................................... 6

1.3.3 TM 314 – TM 317 ......................................................................................................................................... 12

2. INSTALLATION / CONFIGURATION ................................................................................................17

2.1 MOUNTING POSSIBILITIES ................................................................................................................................... 17

2.1.1 Suspended Installation .................................................................................................................................. 17

2.1.2 Supported Installation ................................................................................................................................... 17

2.1.3 TM/TMB in Vertical Installation ................................................................................................................... 18

2.2 PARASITIC FORCES ................................................................................................................................................. 18

2.2.1 Radial Forces (Bending) ............................................................................................................................... 19

2.2.2 Axial Forces (Thrust) .................................................................................................................................... 20

2.3 MEASURING SHAFT VIBRATIONS .......................................................................................................................21

2.3.1 Permitted Vibrations on Measuring Shaft ..................................................................................................... 21

2.3.2 Torque Signal Conditioning Electronic Circuit ............................................................................................. 23

2.4 MOUNTING LIMITS ................................................................................................................................................. 24

2.4.1 Dynamic Torque ............................................................................................................................................ 24

2.4.2 Natural Frequency of Drive Train ................................................................................................................. 24

2.4.3 Natural Measuring Shaft Torsional Frequency ............................................................................................. 26

2.4.4 Maximum Dynamic Amplitude..................................................................................................................... 27

2.5 PROTECTIVE SYSTEMS .......................................................................................................................................... 27

2.6 ELECTRONIC SIGNAL PROCESSING .................................................................................................................... 29

2.6.1 Model 3410 Torque Display .......................................................................................................................... 29

2.6.2 Model 6400 Torque Transducer Display ....................................................................................................... 30

2.6.3 Model DSP6001 Programmable Dynamometer Controller .......................................................................... 31

2.7 ELECTRICAL CONNECTIONS ............................................................................................................................... 32

2.7.1 Grounding ..................................................................................................................................................... 32

2.7.2 Connecting Cable .......................................................................................................................................... 33

2.7.3 Connection to Non-Magtrol Electronics ....................................................................................................... 34

3. OPERATING PRINCIPLES ...............................................................................................................36

3.1 TORQUE TRANSDUCER ARCHITECTURE .......................................................................................................... 36

iii

Table of Contents Magtrol TM Series In-Line Torque Transducers

3.1.1 Differential Transformer ............................................................................................................................... 37

3.2 SPEED CONDITIONING CHAIN ............................................................................................................................. 37

3.3 BUILT-IN SELF-TEST CIRCUIT .............................................................................................................................. 37

4. MAINTENANCE / REPAIR ................................................................................................................38

4.1 MAINTENANCE ........................................................................................................................................................ 38

4.2 REPAIR ....................................................................................................................................................................... 39

SERVICE INFORMATION ......................................................................................................................40

RETURNING MAGTROL EQUIPMENT FOR REPAIR AND/OR CALIBRATION ..................................................... 40

Returning Equipment to Magtrol, Inc. (United States) ............................................................................................... 40

Returning Equipment to Magtrol SA (Switzerland) .................................................................................................... 40

TABLE OF FIGURES

1. INTRODUCTION

Figure 1–1 TMB 313 In-Line Torque Transducer .......................................................................................................1

2. INSTALLATION / CONFIGURATION

Figure 2–1 Suspended Installation ...........................................................................................................................17

Figure 2–2 Supported Installation ............................................................................................................................18

Figure 2–3 Parasitic Forces ......................................................................................................................................18

Figure 2–4 Radial Displacement ..............................................................................................................................21

Figure 2–5 Vibratory Acceleration ............................................................................................................................22

Figure 2–6 SW1 – SW12 Micro-switches and Offset Adjustment Potentiometer ......................................................23

Figure 2–7 Simplified Drive Train Model .................................................................................................................24

Figure 2–8 Frequency Response Graph ....................................................................................................................25

Figure 2–9 Admissible Dynamic Load ......................................................................................................................27

Figure 2–10 Example of Protective System...............................................................................................................28

Figure 2–11 Model 3410 Torque Display .................................................................................................................29

Figure 2–12 PC-Based System Configuration with Model 3410 Display .................................................................29

Figure 2–13 Model 6400 Torque Transducer Display ..............................................................................................30

Figure 2–14 PC-Based System Configuration with Model 6400 Display .................................................................30

Figure 2–15 Model DSP6001 Programmable Dynamometer Controller .................................................................31

Figure 2–16 PC-Based System Configuration with Model DSP6001 Controller .....................................................31

Figure 2–17 Common Grounding .............................................................................................................................32

Figure 2–18 6-pin Souriau Connector Configuration ...............................................................................................33

Figure 2–19 14-pin Centronics Connector Configuration ........................................................................................33

Figure 2–20 Wiring Diagram for Connection to Non-Magtrol Electronics ..............................................................34

Figure 2-21 ER 107 Pin Configuration .....................................................................................................................35

3. OPERATING PRINCIPLES

Figure 3–1 TM Torque Transducer Principal Elements ............................................................................................36

iv

PURPOSE OF THIS MANUAL

This manual contains information required for the installation and general use of Magtrol’s TM
Series In-Line Torque Transducers. To achieve maximum capability and ensure proper use, please
read this manual in its entirety before operating the unit. Keep the manual in a safe place for quick
reference whenever a question should arise.

WHO SHOULD USE THIS MANUAL

This is written for operators installing a torque transducer as part of a test system that meausres the
torque on transmission chains. The operator is assumed to have the necessary technical training in
electronics and mechanical engineering enabling him to install the in-line torque transducer without
risk.

MANUAL ORGANIZATION

This section gives an overview of the structure of the manual and the information contained therein.
Some information has been deliberately repeated in different sections of the document to minimize
cross-referencing and to facilitate understanding through reiteration.

Preface

The structure of the manual is as follows:

Chapter 1 : INTRODUCTION – Contains the technical data sheets for Magtrol’s TM In-Line

Torque Transducers, which describe the units and provide detailed technical
characteristics.

Chapter 2 : INSTALLATION / CONFIGURATION – Provides information needed for the setup

of the TM Transducers in a test system, and their integration with Magtrol electronic
control units.

Chapter 3 : OPERATING PRINCIPLES – Information pertaining to theory of operation

including details about the transducer's architecture, speed conditioning chain and
built-in self-test circuit.

Chapter 4 : MAINTENANCE / REPAIR – Provides information on maintenance and repair

procedures, should the need arise.

v

Magtrol TM Series In-Line Torque TransducersPreface

CONVENTIONS USED IN THIS MANUAL

The following symbols and type styles may be used in this manual to highlight certain parts of the
text:

Note: This is intended to draw the operator’s attention to complementary

information or advice relating to the subject being treated. It
introduces information enabling the correct and optimal functioning
of the product to be obtained.

Caution : this is used to draw the operator's attention to information,

direCtives, proCedures, etC. whiCh, if ignored, may result in damage
being Caused to the material being used. the assoCiated text
desCribes the neCessary preCautions to take and the ConsequenCes
that may arise if the preCautions are ignored.

Warning! thi s in t roduces dire c t i ves, proced u r e s,

precautionary measures, etc. Which must Be
eXecuted or folloWed With the utmost care
and attention, otherWise the personal safety
of the operator or third parties may Be put
at risk. the reader must aBsolutely take note
of the accompanying teXt, and act upon it,
Before proceeding further.

vi

1. Introduction

1.1 GENERAL INFORMATION

The TM Series In-Line Torque Transducers represent the new generation of high-precision torque
sensors with integrated electronic processing circuitry developed by Magtrol. The TM Series
transducers are available in three versions: TMB, TM and TMHS. TMB for all standard applications,
TM for high-precision applications and TMHS for high-speed applications.

The TM 300 Series includes transducers with the following torque ratings: 0.1 N·m, 0.2 N·m, 0.5
N·m, 1 N·m, 2 N·m, 5 N·m, 10 N·m, 20 N·m, 50 N·m, 100 N·m, 200 N·m, 500 N·m, 1 000 N·m,
2 000 N·m, 5 000 N·m and 10 000 N·m.

The TM Series In-Line Transducers, together with Magtrol's New TF Series Torque Flange
Transducers, offer a wide range of torque measurement requirements for the most demanding
applications.

1.2 DESCRIPTION

All TM Series In-Line Torque Transducers consist of a torque measuring shaft and built-in signal
processing electronics. These elements, along with two sealed bearings having lifelong lubrication,
are all contained in an aluminium housing which also supports the shaft.

The upper part of the unit contains the built-in electronics. This part is sealed according to the
IP44 standard and offers protection against splashed water. A Souriau connector allows the torque
transducer to be connected to an external signal processing unit—such as the Magtrol 3410 Torque
Display—via a special cable assembly.

Figure 1–1 TMB 313 In-Line Torque Transducer

TM Torque Transducers perform the following main functions:

1. Measurement of static and dynamic torque and detection of torque direction.

2. Measurement of the shaft's rotational speed and detection of rotational direction.

3. Self-check.

The transducer's integrated electronic circuitry filters the torque signal and its built-in self-test
function checks the operation of the measuring chain. Each transducer also has a built-in temperature
compensation circuit. This assures that the accuracy of the measured torque is maintained regardless
of operating temperature.

1

1.3 DATA SHEETS

TM 301 – TM 308

Data Sheet

1.3.1 TM 301 – TM 308

Magtrol TM Series In-Line Torque TransducersChapter 1 – Introduction

TM 301 – TM 308
In-Line Torque Transducers

FEATURES

• Integrated Torque and Speed Conditioning

• Torque Range: 0.1 N·m to 20 N·m (0.07 lb·ft to 15 lb·ft)

• Accuracy: < 0.1%

• Overload Capacity: 200%

• Overload Limit: 400%

• High Speed Applications: up to 50,000 rpm

• Non-Contact (no sliprings)

• No Electronic Components in Rotation

• High Electrical Noise Immunity

• Single DC Power Supply: 20 VDC to 32 VDC

• Immediate Speed Detection

• Adjustable Torque Signal Frequency Limitation

• Built-in Test Function

• Stainless Steel Shaft

• EMC Susceptibility Conforms to European Standards

DESCRIPTION

Magtrol’s In-Line Torque Transducers provide extremely
accurate torque and speed measurement over a very broad range.
Each model has an integrated conditioning electronic module
providing a 0 to ±10 VDC torque output and an open collector
speed output. Magtrol Torque Transducers are very reliable,
providing high overload protection, excellent long term stability
and high noise immunity.

All transducer models employ our unique non-contact
differential transformer torque measuring technology. This
measuring technology offers many benefits, most notably that
no electronic components rotate during operation.

To provide customers with several price/performance options,
Magtrol offers three torque transducer models: basic accuracy
(TMB series), high accuracy (TM series) and high speed with
high accuracy (TMHS).

Each transducer consists of a hardened stainless steel shaft with
smooth shaft ends, an anodized aluminium housing containing
the guide bearings and

an electronic measurement conditioner.

Model TM 307
Torque Transducer

The integrated electronic circuit, supplied by single DC voltage,
provides torque and speed signals without any additional
amplifier. Connections are made by means of a 6-pole male
connector mounted on the housing, and fixed mounting is
enabled by mounting holes located on the transducer.

APPLICATIONS

TM, TMB and TMHS Series Torque Transducers provide
dynamic torque and speed measurement of:

• Propellers - aerospace, marine and helicopter

• Windshield wipers, electrical windows, starters,
generators and brakes in automobile industry

• Pumps - water and oil

• Reduction gears and gearboxes

• Clutches

• Motorized valves

• Drills, pneumatic tools and other machine tools

BASIC SYSTEM CONFIGURATION

TORQUE

TRANSDUCER

TM 301 – TM 308

Power Supply 20 to 32 VDC / 100 mA max.

Test

Torque 0 to ±10 VDC (max.)

Speed

2

Magtrol TM Series In-Line Torque Transducers

in series), max. 30 VDC, protected against short-circuits

Chapter 1 – Introduction

Specifications

TM 301 – TM 308

moDel ratings

The ratings in the following table apply to all Torque Transducer series (TM, TMHS and TMB).

Model

301 * 0.1 0.07 29 21 2.50 × 10
302 * 0.2 0.15 29 21 2.50 × 10
303 0.5 0.37 66 48 2.55 × 10
304 1 0.7 145 107 2.82 × 10
305 2 1.5 290 214 2.91 × 10
306 5 3.7 725 535 3.08 × 10
307 10 7.4 1450 1069 2.63 × 10
308 20 15 2900 2139 2.66 × 10

* Models 301 and 302 available in TM Series only.

Nominal Rated Torque Torsional Stiffness Moment of Inertia Weight

N·m lb·ft N·m/rad lb·ft/rad kg·m² lb·ft·s² kg lb

-5

-5

-5

-5

-5

-5

-5

-5

1.84 × 10

1.84 × 10

1.88 × 10

2.07 × 10

2.14 × 10

2.27 × 10

1.94 × 10

1.96 × 10

-5

-5

-5

-5

-5

-5

-5

-5

1.1 2.43

1.1 2.43

1.1 2.43

1.2 2.65

1.2 2.65

1.2 2.65

1.2 2.65

1.2 2.65

series ratings

The ratings in the following table apply to all standard Torque Transducer models 301–308, unless otherwise noted.

Stand ard Ve rsi on TM Se ries TMHS Ser ies TMB S eries

TORQUE MEASUREMENT

Rated Torque (RT) 0 to ±100% of RT
Maximum Dynamic Torque Peak Value

(Overload Capacity)
Maximum Dynamic Torque Without Damage

(Overload Limit)
Combined Error of Linearity and

Hysteresis
to 100% of RT

Combined Error of Linearity and
Hysteresis from 100% to 200% of RT

< ±0.1% of RT

(0.2% for TM 301)

< ±0.1% of

measured value

(0.2% for TM 301)

Temperature Influence on the Zero/
Sensitivity:

• In the Compensated Range +10 °C to +60 °C < ±0.1% of RT/10K < ±0.2% of RT/10K

• In the Compensated Range -25 °C to +80 °C < ±0.2% of RT/10K < ±0.4% of RT/10K
Influence of Speed on the Zero Torque

Signal

< ±0.01% of RT/1000 rpm < ±0.02% of RT/1000 rpm

Long-term Stability of Sensitivity < ±0.05% of RT/year < ±0.1% of RT/year

SPEED MEASUREMENT

Rated Range of Use 1 to 20,000 rpm

TMHS 303: 1 to 40,000 rpm

TMHS 304-308: 1 to 50,000 rpm
Number of Teeth 60 Z
Minimum Speed Detection 1 rpm

ENVIRONMENT

Storage Temperature Range -40 °C to +100 °C
Operating Temperature Range -40 °C to +85 °C
Mechanical Shock according to IEC 68.2.27 / Class D3
Vibration according to IEC 68.2.6 / Class D3
Protection Class IP 44

MECHANICAL CHARACTERISTICS

Shaft Ends smooth

Balancing Quality G1 according to ISO 1940

INPUT AND OUTPUT SIGNALS

Power Supply (max. voltage / current) 20 to 32 VDC / 100 mA
Torque Output (rated / max.) ±5 / ±10 VDC
Filter Cutoff (frequency) 5000, 2500, 1000, 500, 200, 100, 40, 20, 10, 5, 2, 1 Hz
Speed Output (frequency)

open collector (15 Ω

CONNECTORS

Counter Connector (female) optional (P/N 957.11.08.0081)

0 to ±200% of RT

0 to ±400% of RT

< ±0.1% of RT < ±0.1% of RT

< ±0.1% of

measured value

< ±0.15% of

measured value

1 to 6,000 rpm

G2.5 according to

ISO 1940

3

Magtrol TM Series In-Line Torque TransducersChapter 1 – Introduction

Specifications

operating principles

The measuring system, based on the principle of a variable,
torque-proportional transformer coupling, consists of two
concentric cylinders shrunk on the shaft on each side of the
shaft’s deformation zone, and two concentric coils attached
to the housing.

Both cylinders have a circularly disposed coinciding row of
slots and rotate with the shaft inside the coils. An alternating
current with the frequency of 20 kHz flows through the primary
coil. When no torque is applied, the slots on the two cylinders
fail to overlap. When torque is applied, the deformation zone
undergoes an angular deformation and the slots begin to

Dimensions

M CC

60°

D

C

TM 301–303
Shaft Detail

F

J

H

G

F

L P

K

N

A

BCF

E

D

TM 301 – TM 308

overlap. Thus a torque-proportional voltage is on the secondary
coil. The conditioning electronic circuit incorporated in the
transducer converts the voltage to a nominal torque signal
of 0 to ±5 VDC. A low-pass filter (Butterworth/2nd order),
adjustable from 5 kHz to 1 Hz, allows tuning of the torque
signal frequency limitation.

An optical sensor reads the speed on a toothed path machined
directly on the measuring system. The electronic conditioner
outputs a frequency signal proportional to the shaft rotational
speed. An active circuit compensates the zero and sensitivity
temperature drifts within a tolerance of 0.1% / 10 K.

N

R

Q

S

CAUTION!

C

E

B

A

D

60°

ROTATING PARTS

IN OPERATION.

STOP SYSTEM BEFORE

PERFORMING

MAINTENANCE.

U

V

W

Y GG

Permitted

X FF

Axial Thrust

AA

T

EE

NOTE:

Dimensions are the same for every series (TM, TMHS, TMB).
Original dimensions are in Metric units. Dimensions converted to English have been rounded up to 3 or 4 decimal places.

Model units Ø A Ø B Ø C Ø D E F G H J K L M N P Q

60 42g6 2.12 0.1 --- 1.9 --- --- 13.2 7.8 5 114 60 5 9

2.362

1.6533

1.6526

0.083 0.004 --- 0.075 --- --- 0.520 0.307 0.197 4.488 2.362 0.197 0.354

60 42g6 6.7 4.3 M4 3.2 10 14 21.2 10.8 5 136 60 5 12

2.362

1.6533

1.6526

0.264 0.169 M4 0.126 0.394 0.551 0.835 0.425 0.197 5.354 2.362 0.197 0.472

301–303

304–308

mm

in

mm

in

Model units R S Ø T U V W X Y AA CC DD EE FF GG

0

(

-0.05

1.3779

1.3760

0

(

-0.05

1.3779

1.3760

)

30 7.5 45

1.181 0.295 1.772

)

30 ±0.02 7.5 45

1.1819

1.1803

0.295 1.772

301–303

304–308

mm

in

mm

in

14 12 6h6 15 10 M5 7.5 45 100 87 35

0.551 0.472

0.2362

0.2359

0.591 0.394 M5 0.295 1.772 3.937 3.425

22 20 10h6 15 10 M5 7.5 45 100 87 35

0.866 0.787

0.3937

0.3933

0.591 0.394 M5 0.295 1.772 3.937 3.425

DD

4

Magtrol TM Series In-Line Torque Transducers

Chapter 1 – Introduction

Specifications

system options anD accessories

TM SERIES

Unit Under Test

Mandatory for high speed applications.

Unit Under Test

For low speed applications only, uses single-element

couplings to create a shorter drive train.

TORQUE TRANSDUCER

A

B C F

E

D

CAUTION!

ROTATING PARTS

IN OPERATION.

STOP SYSTEM BEFORE

PERFORMING
MAINTENANCE.

Coupling Coupling

Supported Installation

TM SERIES

TORQUE TRANSDUCER

MAINTENANCE.
PERFORMING

STOP SYSTEM BEFORE
IN OPERATION.
ROTATING PARTS

CAUTION!

D

Coupling Coupling

E

BCF

A

Suspended Installation

TM 301 – TM 308

PC

Torque 1.0

Software

RS-232C

MAGTROL

Model 3410

Torque Display

PC-Based System Configuration

Torque Transducer with Model 3410 Display

and Torque 1.0 Software

Torque Transducer

SYSTEM

SELECT

TARE

TRANSDUCER

TM Series

SPEED TORQUE

Couplings

When Magtrol TMB, TM and TMHS Series Torque Transducers
are to be mounted in a drive train, double-element miniature
couplings are the ideal complement, although single-element
couplings can be used for low speed applications. Several
manufacturers provide adequate couplings for both supported
and suspended drive train installations. The criteria for selecting
appropriate couplings for torque measurement is as follows:

• High torsional spring rate: Ensures a high torsional
stiffness and angular precision (should be greater than
three times the torque transducer stiffness)

• Clamping quality (should be self-centering and of
adequate strength)

• Speed range

• Balancing quality (according to speed range)

• Alignment capability

The higher the speed of the application, the more care is required in
selecting the coupling and assembling (alignment and balancing)
the drive train configuration. Your Magtrol sales representative
can assist you in choosing the right coupling for your transducer.

Torque Speed Box

Magtrol’s TSB Torque Speed Box allows data acquisition
from two torque transducers simultaneously and provides the
torque’s analog signal output and speed’s TTL signal output.

Torque Transducer Displays

Magtrol offers two different Torque Displays (Models 3410 and

6400) which supply power to any TM/TMHS/TMB Transducer
and display torque, speed and mechanical power. Features
include:

• Adjustable English, metric and SI torque units

• Large, easy-to-read vacuum fluorescent display

• Built-in self-diagnostic tests

• Overload indication

• Tare function

• RS-232 interface

• Torque and speed outputs

• Closed-box calibration

• Includes Magtrol Torque 1.0 Software

The Model 6400 Display has the following additional features:

• Pass/fail torque-speed-power testing capabilities

• RS-232 and IEEE-488 interface

• Auxiliary analog input

Torque 1.0 Software

Magtrol’s Torque 1.0 Software is an easy-to-use Windows

®

executable program, used to automatically collect torque, speed
and mechanical power data. The data can be printed, displayed
graphically or quickly saved as a Microsoft

®

Excel spreadsheet.
Standard features of Torque 1.0 include: peak torque capture,
multi-axes graphing, measured parameter vs. time, adjustable
sampling rates and polynomial curve fitting.

Accessories Model #
Torque Transducer Connector Cable (5/10/20

m)

ER 113

5

1.3.2 TM 309 – TM 313

TM 309 – TM 313

Data Sheet

Magtrol TM Series In-Line Torque TransducersChapter 1 – Introduction

TM 309 – TM 313
In-Line Torque Transducers

FEATURES

• Integrated Torque and Speed Conditioning

• Torque Rating: 20 N·m to 500 N·m (37 lb·ft to 369 lb·ft)

• Accuracy: < 0.1%

• Overload Capacity: 200%

• Overload Limit: 400%

• High Speed Applications: up to 32,000 rpm

• Non-Contact (no sliprings)

• No Electronic Components in Rotation

• High Electrical Noise Immunity

• Single DC Power Supply: 20 VDC to 32 VDC

• Immediate Speed Detection

• Adjustable Torque Signal Frequency Limitation

• Built-in Test Function

• Stainless Steel Shaft

• EMC Susceptibility Conforms to European Standards

DESCRIPTION

Magtrol’s In-Line Torque Transducers provide extremely
accurate torque and speed measurement over a very broad range.
Each model has an integrated conditioning electronic module
providing a 0 to ±10 VDC torque output and an open collector
speed output. Magtrol Torque Transducers are very reliable,
providing high overload protection, excellent long term stability
and high noise immunity.

All transducer models employ our unique non-contact
differential transformer torque measuring technology. This
measuring technology offers many benefits, most notably that
no electronic components rotate during operation.

To provide customers with several price/performance options,
Magtrol offers three torque transducer models: basic accuracy
(TMB series), high accuracy (TM series) and high speed with
high accuracy (TMHS).

Each transducer consists of a hardened stainless steel shaft with
smooth or splined shaft ends, an anodized aluminium housing
containing the guide bearings
conditioner. The integrated electronic circuit, supplied by single

and an electronic measurement

Model TM 313
Torque Transducer

DC voltage, provides torque and speed signals without any
additional amplifier. The transducer is a stand-alone measuring
chain. Connections are made by means of a 6-pole male
connector mounted on the housing. A removable aluminium
base—delivered as standard with TM and TMHS models, and
as an option for TMB transducers—allows fixed mounting of
the transducer.

APPLICATIONS

TM, TMB and TMHS Series Torque Transducers provide
dynamic torque and speed measurement of:

• Propellers - aerospace, marine and helicopter

• Windshield wipers, electrical windows, starters,

generators and brakes in automobile industry

• Pumps - water and oil

• Reduction gears and gearboxes

• Clutches

• Motorized valves

• Drills, pneumatic tools and other machine tools

BASIC SYSTEM CONFIGURATION

TORQUE

TRANSDUCER

TM 309 – TM 313

Power Supply 20 to 32 VDC / 100 mA max.

Test

Torque 0 to ±10 VDC (max.)

Speed

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Magtrol TM Series In-Line Torque Transducers

Chapter 1 – Introduction

Specifications

TM 309 – TM 313

moDel ratings

The ratings in the following table apply to all Torque Transducer series (TM, TMHS and TMB).

Model

309 20 15 2.4 × 10
310 50 37 5.7 × 10
311 100 74 1.14 × 10
312 200 148 3.82 × 10
313 500 369 9.58 × 10

* The weight for TMB series transducers ordered without an optional foot mount is slightly lower.

Nominal Rated Torque Torsional Stiffness Moment of Inertia Weight *

N·m lb·ft N·m/rad lb·ft/rad kg·m² lb·ft·s² kg lb

3

1.770 × 1031.49 × 10-41.03 × 10

3

4.204 × 1031.52 × 10-41.12 × 10

4

8.408 × 1031.55 × 10-41.14 × 10

4

2.82 × 1044.85 × 10-43.57 × 10

4

7.07 × 1045.16 × 10-43.80 × 10

-4

-4

-4

-4

-4

2.5 5.51

2.5 5.51

2.5 5.51

4.1 9.04

4.4 9.70

series ratings

The ratings in the following table apply to all standard Torque Transducer models 309–313, except where specifically noted.

Stand ard Versi on TM S eri es TMHS Ser ies TMB S eri es

TORQUE MEASUREMENT

Rated Torque (RT) 0 to ±100% of RT
Maximum Dynamic Torque Peak Value

(Overload Capacity)
Maximum Dynamic Torque Without Damage

(Overload Limit)
Combined Error of Linearity and Hysteresis

to 100% of RT
Combined Error of Linearity and Hysteresis

from 100 to 200% of RT
Temperature Influence on the Zero/

Sensitivity:

• In the Compensated Range +10 °C to +60 °C < ±0.1% of RT/10K < ±0.2% of RT/10K

• In the Compensated Range -25 °C to +80 °C < ±0.2% of RT/10K < ±0.4% of RT/10K
Influence of Speed on the Zero Torque

Signal
Long-term Stability of Sensitivity < ±0.05% of RT/year < ±0.1% of RT/year

SPEED MEASUREMENT

Rated Range of Use

Number of Teeth 60 Z
Minimum Speed Detection 1 rpm

ENVIRONMENT

Storage Temperature Range -40 °C to +100 °C
Operating Temperature Range -40 °C to +85 °C
Mechanical Shock according to IEC 68.2.27 / Class D3
Vibration according to IEC 68.2.6 / Class D3
Protection Class IP 44

MECHANICAL CHARACTERISTICS

Shaft Ends

Balancing Quality G1 according to ISO 1940

Foot Support (Base Mount) included included optional

INPUT AND OUTPUT SIGNALS

Power Supply (max. voltage / current) 20 to 32 VDC / 100 mA
Torque Output (rated / max.) ±5 / ±10 VDC
Filter Cutoff (frequency) 5000, 2500, 1000, 500, 200, 100, 40, 20, 10, 5, 2, 1 Hz

Speed Output (frequency)

CONNECTORS

Counter Connector (female) optional (P/N 957.11.08.0081)

models 309–311 1 to 10,000 rpm 1 to 32,000 rpm 1 to 4,000 rpm
models 312–313 1 to 10,000 rpm 1 to 24,000 rpm 1 to 4,000 rpm

model 309 smooth
models 310–311 smooth smooth keyway
models 312–313 smooth or splined smooth or splined keyway

< ±0.1% of RT < ±0.1% of RT < ±0.1% of RT

< ±0.1% of

measured value

< ±0.01% of RT/1000 rpm < ±0.02% of RT/1000 rpm

open collector (15 Ω in series), max. 30 VDC, protected against short-

0 to ±200% of RT

0 to ±400% of RT

< ±0.1% of

measured value

circuits

< ±0.15% of

measured value

G2.5 according to ISO

1940

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