Kistler 9329A User manual

Instruction
manual
Reaction torque
sensors
Types 9329A, 9339A,
9349A, 9369A,9389A
9329A_002-267e-12.23

Foreword
9329A_002-267e-12.23 Page 1
Foreword
We thank you for choosing a Kistler quality product distin-
guished by technical innovation, precision and long life.
Information in this document is subject to change without notice.
Kistler reserves the right to change or improve its products and
make changes in the content without obligation to notify any
person or organization of such changes or improvements.
© 2009 … 2023 Kistler Group. All rights reserved. Except as
expressly provided herein, no part of this manual may be repro-
duced for any purpose without the express prior written consent
of Kistler Group.
Kistler Group
Eulachstrasse 22
8408 Winterthur
Switzerland
Tel. [phone]
[e-mail]
www.kistler.com

Reaction torque sensors Type 9329A, 9339A, 9349A, 9369A, 9389A
Page 2 9329A_002-267e-12.23
Content
1. Introduction ................................................................................................................................................. 4
2. Important notes........................................................................................................................................... 5
2.1 For your safety................................................................................................................................... 5
2.2 Unpacking.......................................................................................................................................... 6
2.3 Notes on using the reaction torque sensor ........................................................................................ 6
2.4 Hints on using these operating instructions ....................................................................................... 7
3. General description .................................................................................................................................... 8
3.1 What is the purpose of the reaction torque sensor? .......................................................................... 8
3.2 Construction and functional principle of the reaction torque sensor................................................... 9
4. Examples of applications......................................................................................................................... 10
4.1 Calibration of a stationary torque measuring screwdriver................................................................ 10
4.2 Calibration of torque wrenches ........................................................................................................ 11
4.3 Torque testing of potentiometers ..................................................................................................... 12
4.4 Torque testing of ignition switches................................................................................................... 13
5. Installation and startup............................................................................................................................. 14
5.1 Important notes................................................................................................................................ 14
5.2 Installing the reaction torque sensor................................................................................................ 14
5.3 Overview of installation variants ...................................................................................................... 16
5.3.1 Adaptation A: installation in shaft with adapter for shaft journal with pin.......................................... 17
5.3.2 Adaptation B: installation in shaft with adapter flange...................................................................... 19
5.3.3 Adaptation C: installation in shaft with integrated flange.................................................................. 21
5.3.4 Adaptation D: adapter flange for wrenches with external square head............................................ 23
5.3.5 Adaptation E: screw plate with spring assembly.............................................................................. 25
5.3.6 Adaptation F: desktop installation with mounting flange .................................................................. 27
5.4 Basic circuitry and connections for the measuring chain ................................................................. 29
6. Operation................................................................................................................................................... 30
6.1 Charge amplifier settings ................................................................................................................. 30
6.2 Measuring signal polarity ................................................................................................................. 30
6.3 Measuring signal resolution ............................................................................................................. 31
6.4 Quasistatic measurements .............................................................................................................. 31
6.5 Sensitive measurement under high basic load ................................................................................ 32
6.6 Hints for obtaining good measuring results...................................................................................... 34
7. Maintenance .............................................................................................................................................. 35
7.1 Recalibration.................................................................................................................................... 35
7.2 Maintenance work............................................................................................................................ 35
8. Troubleshooting........................................................................................................................................ 36
8.1 Location of faults and remedies....................................................................................................... 36
8.2 Repairing the reaction torque sensor............................................................................................... 36
9. Technical data ........................................................................................................................................... 37
9.1 Reaction torque sensors Type 9329A ... 9389A .............................................................................. 37
9.2 Dimensions reaction torque sensor Type 9329A ... 9389A.............................................................. 38
9.3 Accessories included....................................................................................................................... 39
9.4 Optional accessories ....................................................................................................................... 40

Content
9329A_002-267e-12.23 Page 3
10. Annex......................................................................................................................................................... 41
10.1 Glossary .......................................................................................................................................... 41
10.2 Measurement uncertainty ................................................................................................................ 44
10.3 Linearity........................................................................................................................................... 45
10.4 Frequency range ............................................................................................................................. 47
10.5 Influence of temperature.................................................................................................................. 48
11. Index .......................................................................................................................................................... 50
Total pages 51

Reaction torque sensors Type 9329A, 9339A, 9349A, 9369A, 9389A
Page 4 9329A_002-267e-12.23
1. Introduction
Please take the time to thoroughly read this instruction manual.
It will help you with the installation, maintenance, and use of
this product.
Kistler offers a wide range of products for use in measuring
technology:
Piezoelectric sensors for measuring force, torque, strain,
pressure, acceleration, shock, vibration and acoustic-
emission
Strain gage sensor systems for measuring force and
moment
Piezoresistive pressure sensors and transmitters
Signal conditioners, indicators and calibrators
Electronic control and monitoring systems aswell as
application-specific software for measuring technology
Data transmission modules (telemetry)
Kistler also develops and produces measuring solutions for the
application fields engines, vehicles, manufacturing, plastics and
biomechanics.
Our product and application brochures will provide you with an
overview of our product range. Detailed data sheets are availa-
ble for almost all products.
If you need additional help beyond what can be found
either in this manual or on www.kistler.com, please contact your
Kistler distributor who will also assist you for application specific
questions.

Important notes
9329A_002-267e-12.23 Page 5
2. Important notes
It is essential for you to study the following notes, which are for
your personal safety during work, and to ensure long term,
fault-free operation of this product.
2.1 For your safety
This product has been thoroughly tested and has left the
factory in a perfectly safe condition. In order to maintain this
condition and ensure safe operation, compliance is required
with the instructions and warning notes in these Operating
Instructions.
The reaction torque sensor must be installed, operated and
maintained only by persons who are familiar with this prod-
uct and who are adequately qualified for the work involved.
If it is to be assumed that safe operation is no longer possi-
ble, the equipment must be shut down and made safe
against being accidentally started up.
Safe operation must be assumed to be no longer possible
when the product
shows visible signs of damage,
has been overloaded,
is no longer operating,
has been in lengthy storage under unsuitable conditions
and,
has been subjected to rough transport conditions.
Fix the reaction torque sensor in position as prescribed.
Details can be found in Section 5.2 "Installing the
reaction torque sensor".
Secure all parts mounted on the reaction torque sensor ac-
cording to anticipated moments!

Reaction torque sensors Type 9329A, 9339A, 9349A, 9369A, 9389A
Page 6 9329A_002-267e-12.23
2.2 Unpacking
Check all packaging for transport damage. Report any such
damage to the transporters and to the authorized Kistler distrib-
utor.
Check accessories delivered (see Section 9.3) before first use
of the equipment. Report any missing parts to the authorized
Kistler distributor.
2.3 Notes on using the reaction torque sensor
The reaction torque sensor must be used only under the en-
vironmental and operating conditions specified.
With piezoelectric sensors, insulation resistance is of crucial
importance; it must be approx. 1014 Ω(but not less than 1013
Ω). In order to preserve this value, all plug-and-socket con-
nections must be kept absolutely clean and dry. The insula-
tion resistance can be measured with the insulation tester
Type 5493.
Protect the connector of the Reaction Torque Sensor
against contamination and on no account touch it with your
fingers (connector front). Fit the cover supplied over the
connector when it is not in use.
A high-insulation cable is used to connect the reaction
torque sensor to a charge amplifier. Once fitted, it should if
possible remain connected to the sensor. Use only specified
connecting cables .
We recommend you to protect the cable connector at the
sensor against damage by screwing on the connector cover
provided.
Protect the reaction torque sensor when it is not in use by
storing it in its original packaging.

Important notes
9329A_002-267e-12.23 Page 7
2.4 Hints on using these operating instructions
We recommend you to read the entire operating instructions
carefully. However, if you are in a hurry and already have expe-
rience with Kistler Reaction Torque Sensors, you can confine
yourself to reading the specific information needed.
We have attempted to give these instructions a clear presenta-
tion to make it easier for you to gain direct access to the infor-
mation you need.
Please keep these operating instructions in a safe place where
you can retrieve them at any time.
If you lose these operating instructions, please contact your
Kistler distributor and ask them for an immediate replacement.

Reaction torque sensors Type 9329A, 9339A, 9349A, 9369A, 9389A
Page 8 9329A_002-267e-12.23
3. General description
3.1 What is the purpose of the reaction torque sensor?
Reaction torque sensors are used to measure dynamic and
quasistatic torques.
The main areas of application are:
Calibration
Calibration of manual torque wrenches
Torque setting of pneumatic screwdrivers
Research and development
Measurement of irregular motion and torsional vibrations on
small servo and stepper motors
Measurements of starting torques on electric motors
Measurements on fluid and slipping clutches
Viscosity measurements
Measuring the coefficient of friction of bearings
Designing torsion springs and damping elements
Development of locks and rotary switches
Lubricant development
Biomechanics and ergonomic measurements
Production engineering
Monitoring automated screwing processes
Monitoring boring and cutting processes
Quality control
Testing screw connections
Torsion testing of springs
Testing the torque characteristics of hinges
Testing rotary switches
Testing of screw caps
The hole pattern of the bilaterally integrated flange and the op-
tional accessories enable Kistler reaction torque sensors to be
adapted to almost any task. Bilateral centering seats and the
included centering rings assist in the precise axial application of
torque. A centric bore can be used for shaft bushing.
Kistler reaction torque sensors are distinguished by high
rigidity and a high natural frequency. The effective useful fre-
quency range is, however, determined by the natural
frequency of the entire test arrangement. The high resolution ena-
bles the tiniest dynamic changes to be measured, even where
large torques are involved.
Kistler reaction torque sensors are calibrated prior to
delivery and can be used immediately.

General description
9329A_002-267e-12.23 Page 9
3.2 Construction and functional principle of the reaction torque
sensor
The special, patented construction of Kistler reaction torque
sensors is distinguished by the fact that the sensor is integrated
under high axial preload between a preload screw and a nut.
The torque is thus transferred by friction onto the shear-
sensitive quartz disks. This sensor preload is the prerequisite
for good output signal linearity, particularly for small torques.
The reaction torque sensor is seal welded and rust-resistant.
With cable connected and O-ring correctly fitted in the cable
connector, the plug connection is protected against the ingress
of spray water. The cable connection is protected against me-
chanical damage by a screw-on connector cover.
Matching centering rings on the centering seats (6) are provid-
ed for precise coaxial application of torque.
1 Sensor
2 Preload screw
3 Nut
4 Plug connection
5 Screw-on connector cover
6 Inner centering seat
7 Outer centering seat
8 Mounting thread
9 Free passage
For dimensions see page 38.
Fig. 1: Construction
The reaction torque sensor uses quartz disks in a circular ar-
rangement. The shear-sensitive direction of the quartz disks is
tangential, so that a charge signal proportional to the torque is
fed out in a parallel circuit.
Clockwise torques produce a negative charge signal at
the sensor, and a positive display value or voltage at the analog
output of the charge amplifier.
As a result of the piezoelectric measuring principle and due to
the high rigidity of the reaction torque sensor, the measurement
is made with practically no displacement.
Fig. 2: Functional principle

Reaction torque sensors Type 9329A, 9339A, 9349A, 9369A, 9389A
Page 10 9329A_002-267e-12.23
4. Examples of applications
4.1 Calibration of a stationary torque measuring screwdriver
A pneumatic screwdriver with integrated torque sensor is cali-
brated with a reaction torque sensor.
Two measuring chains consisting of
Torque sensor Type 9039A (to be calibrated)
Reaction torque sensor Type 9349A (Reference)
2 x charge amplifiers Type 5015A
Fig. 3: Calibration of a torque measuring screwdriver
For this application, the reaction torque sensor is equipped with
a screw plate with spring assembly, see Section 5.3.5. Various
screwing arrangements can be represented with this structure,
depending on the number and hardness of the cup springs.
Torque sensor Type 9039A
i
ntegrated in torque measuring
screwdriver
Reaction torque sensor Type 9349A
with mounting fl
ange Type 9580A1
(Reference)

Examples of applications
9329A_002-267e-12.23 Page 11
4.2 Calibration of torque wrenches
Measuring chain consisting of
Reaction torque sensor Types 9329A ... 9389A
on mounting flange Types 9580A0 ... 9580A9
Connecting cable Type 1631C…
Charge amplifier Type 5015A
Fig. 4: Calibrating torque wrenches
Mounting flange
Type 9580A0 ... 958
0A9
Adapter
Type 1631C...
M
z

Reaction torque sensors Type 9329A, 9339A, 9349A, 9369A, 9389A
Page 12 9329A_002-267e-12.23
4.3 Torque testing of potentiometers
Automated testing of the torque as a function of rotary angle of po-
tentiometers at an automobile suppliers.
Measuring chain consisting of
Reaction torque sensor Type 9339A
ControlMonitor CoMo II-S Type 5859A…
Fig. 5: Testing potentiometers
The ControlMonitor CoMo II-S is used for monitoring production
processes, where there is a characteristic relationship between
a measurand as a function of time y(t) or of a second measur-
and y(x) (displacement, rotary angle). A large number of func-
tions such as thresholds, boxes, limit position or tolerance band
is available for evaluation.
Type 9339A
Potentiometer

Examples of applications
9329A_002-267e-12.23 Page 13
4.4 Torque testing of ignition switches
Reaction torque sensor in a system for testing the torque char-
acteristics of ignition switches over the entire rotary angle
range.
Fig. 6: Testing ignition switches

Reaction torque sensors Type 9329A, 9339A, 9349A, 9369A, 9389A
Page 14 9329A_002-267e-12.23
5. Installation and startup
5.1 Important notes
The reaction torque sensors Type 9329A … 9389A are preci-
sion instruments whose specifications can be fully utilized only
when they are correctly used, and remain so only when handled
carefully. Ensure that you comply with the following directions:
Do not drop the reaction torque sensor and do not subject it
to hard impacts! The peak force of this kind of shock can
cause permanent damage.
Do not use a hammer to position the workpieces, since
hammer blows can also cause damage!
The following sections describe the installation of the reaction
torque sensor and the setting up of the measuring chain.
5.2 Installing the reaction torque sensor
Please comply with the following instructions for correct
installation of the reaction torque sensor
The reaction torque sensor must be installed only by per-
sons who are familiar with this instrument and are adequate-
ly qualified for this work.
When installation takes place in a shaft, the coaxial devia-
tion must be not more than 0,02 mm. Deviations from coaxi-
al straightness result in unwanted bending moments, which
can overload and permanently damage the sensor. The
contact surfaces of adapter flanges must be machined per-
fectly flat. If the reaction torque sensor is used as a calibra-
tion element, the adjoining surfaces must have a roughness
of Ra ≤0,8 µm (N6), otherwise a roughness of Ra≤6,3
µm (N9) will suffice. The contact surfaces must be thorough-
ly cleaned before installation.
The reaction torque sensor is designed for measuring torques
in the longitudinal axis. Although additional bending mo-
ments, tensile,pressure and shear forces can be ab-
sorbed to a certain extent by the reaction torque sensor,
these must be avoided as far as possible.

Installation and startup
9329A_002-267e-12.23 Page 15
The torque must b
e applied exclusively via the flange
surfaces at the upper and lower sides of the reaction torque
sensor. The torque is thereby transferred via socket head
screws (minimum property class 12.9) or mounting parts with
corresponding external threads. Select t
he length of the
screws so that the depth of the threaded blind bore in the
flange of the reaction torque sensor is utilized to the fullest
extent possible. However, the screws must not come into
contact with the base of the threaded blind bore.
Fig. 7: Reaction torque sensor with mounting flange
When firmly tightening the screw connections
, the fork
wrench must only be used to hold the flange on that side
where the s
crew connections are being tightened! If the
opposite side is held, there is a risk that the screw
connection in the reaction torque sensor will loosen causing
the latter to turn within itself. This will alter the internal
preload resulting in the calibration being lost, and possibly
rendering the reaction torque sensor unusable for precise
torque measurement! In this event, the reaction torque sen-
sor must again be properly preloaded and recalibrated!
Tightening torques MAfor cap screws
Type 9329A M3x8 MA= 1 N·m
Type 9339A M4x10 MA= 2 N·m
Type 9349A M5x12 MA= 4 N·m
Fig. 8: Installing reaction torque sensor Type 9369A M8x20 MA= 21 N·m
Type 9389A M12x30 MA= 100 N·m
We advise using screws of at least property class 12.9.
The connecting cable must be connected only after installa-
tion of the reaction torque sensor has been completed. As
contamination of the plug connections can result in consider-
able measuring inaccuracies (primarily drift), the plastic con-
nector covers should remain screwed on during installation,
both on the sensor and on the cable! Great care should be
taken in particular in very dirty environments.

Reaction torque sensors Type 9329A, 9339A, 9349A, 9369A, 9389A
Page 16 9329A_002-267e-12.23
5.3 Overview of installation variants
Fig. 9: Installation variants for reaction torque sensors
M
z
Desktop mounting
Shaft installation
A
Installation in shaft with
adapter for shaft journal
with pin
B
Installation in shaft with
adapter flange
C
Installation in shaft with
integrated flange
E
Screw plate with
spring assembly
Adapter for straight bore
recess with pin
Reaction torque
sensor
Reaction torque
sensor
Reaction torque
sensor
Reaction torque
sensor
F
F
Desktop installation with
mounting flange
Reaction torque
sensor
Reaction torque
sensor
D
Adapter flange for
wrenches with external
square head
Reaction torque sensor

Installation and startup
9329A_002-267e-12.23 Page 17
5.3.1 Adaptation A: installation in shaft with adapter for shaft journal with pin
Fig. 10: Installation example A
Mz= Torque [N·m]
Applied via shaft with tool shank or cylinder bore and
flange adapter with pin (pinned during installation).
Fz= Compression force [N]
Fs= Transverse force [N]
This "disturbance force" represents the shear forces and
bending moments acting on the reaction torque sensor.
The maximum permissible values are listed in the table in
the "Technical data" on Page 37.
Adapter for shaft journal with
pin
Customized tool
adapter
Centering rings
(included access
ories)
Adapter for cylinder
bore recess with pin
Pinned during installation
Pinned during installation
MA
Fs
Installation clearance S
Mz
Fz
MA

Reaction torque sensors Type 9329A, 9339A, 9349A, 9369A, 9389A
Page 18 9329A_002-267e-12.23
Centering rings (Art.-No. 3.420.196/179/180/181/197) press
into the centering bores on the reaction torque sensor up to the
mechanical limit stop.
Tightening torques MAfor socket head screws
Type 9329A M3x8 MA= 1 N·m
Type 9339A M4x10 MA= 2 N·m
Type 9349A M5x12 MA= 4 N·m
Type 9369A M8x20 MA= 21 N·m
Type 9389A M12x30 MA= 100 N·m
We recommend using screws with at least property class
12.9, see also Section 5.2.
Clearance S between the end of the mounting screw and
the base of the threaded blind bore in the flange of the reac-
tion torque sensor. The installation clearance should not be
less than 0,5 mm or half a screw turn. Similarly, the depth of
the seating for the centering rings recess in the adapter
must also have a clearance of at least approx. 0,5 mm.