Kistler 6041 Series User manual

Instruction
Manual
7061_002-027e-09.18
Water cooled
piezoelectric
pressure sensors
Types
6041...,
6043...,
6061...,
6067...,
7061...

Instruction
Manual
7061_002-027e-09.18
Water cooled
piezoelectric
pressure sensors
Types
6041...,
6043...,
6061...,
6067...,
7061...

Page 17061_002-027e-09.18
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 obliga-
tion to notify any person or organization of such changes
or improvements.
© 1999 ... 2018 Kistler Group. Kistler Group products are
protected by various intellectual property rights. For more
details visit www.kistler.com. The Kistler Group includes
Kistler Holding AG and all its subsidiaries in Europe, Asia,
the Americas and Australia.
Kistler Group
Eulachstraße 22
8408 Winterthur
Switzerland
Tel. [phone]
[e-mail]
www.kistler.com
Foreword
Foreword

Water cooled piezoelectric sensors
7061_002-027e-09.18Page 2
Content
1. Introduction ...................................................................................................................................3
1.1 Disposal instructions for electronic equipment ...................................................................4
1.2 Software upgrades and updates.........................................................................................4
2. Preface..........................................................................................................................................5
2.1 Techical data and documentation .......................................................................................5
2.2 Principle of operation..........................................................................................................6
2.3 Requirements to water cooling ...........................................................................................7
2.4 Precautions for water cooling .............................................................................................7
3. Installation of the piezoelectric sensor ..........................................................................................9
3.1 General information ............................................................................................................9
3.2 Direct installation ................................................................................................................9
3.3 Installation with sleeve........................................................................................................9
3.4 Installation examples ........................................................................................................10
3.5 Machining the mounting bore ...........................................................................................11
3.6 Mounting the water hose on the cooling pipe ...................................................................11
3.7 Check points before installation........................................................................................12
4. Installing the sensor into the bore ...............................................................................................13
5. Piezoelectric sensor cable routing ..............................................................................................14
6. Setting up the measuring chain ..................................................................................................15
6.1 Connectingthepiezoelectriccabletochargeamplier ....................................................15
6.2 Selecting the sensor sensitivity ........................................................................................15
7. Dismounting and maintenance ...................................................................................................16
7.1 Dismounting......................................................................................................................16
7.2 Maintenance .....................................................................................................................16
Kistler Technical Center services...........................................................................................................19
Total pages 19

Introduction
Page 37061_002-027e-09.18
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.
To the extent permitted by law Kistler does not accept any
liability if this instruction manual is not followed or pro-
ducts other than those listed under Accessories are used.
Kistler offers a wide range of products for use in measu-
ring 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 as well as
softwareforspecicmeasurementapplications
Data transmission modules (telemetry)
Kistler also develops and produces measuring solutions
fortheapplicationeldsengines,vehicles,manufacturing,
plastics and biomechanics sectors.
Our product and application brochures will provide you
with an overview of our product range. Detailed data
sheets are available for almost all products.
If you need additional help beyond what can be found
either online or in this manual, please contact Kistler‘s
extensive support organization.

Water cooled piezoelectric sensors
7061_002-027e-09.18Page 4
1.1 Disposal instructions for electronic equipment
Do not discard old electronic devices in municipal trash.
For disposal at end of life, please return this product to
an authorized local electronic waste disposal service
or contact the nearest Kistler sales ofce for return
instructions.
1.2 Software upgrades and updates
Kistler may from time to time supply upgrades or updates
for embedded software. Such upgrades or updates must
always be installed.
Kistler declines any liability whatsoever for any direct or
consequential damage caused by products running on
embedded software which has not been upgraded or up-
dated with the latest software supplied.

Preface
Page 57061_002-027e-09.18
2. Preface
Water cooled piezoelectric sensors are the most precise
cylinder pressure sensors. They are essential for per-
forming high-precision thermodynamic studies such as
assessment of the combustion curve, determination of the
friction loss and analysis of the gas exchange. The built-
in water cooling keeps the sensing element at constant
temperature (most stable sensor sensitivity regardless
of the engine operating condition) and reduces the load-
change drift (zero offset of the pressure signal) during the
measurement.
Types 6041 6061 6067 7061 6043
Fig. 1: Water-cooled cylinder pressure sensors
2.1 Techical data and documentation
Data sheets are available on www.kistler.com.

Water cooled piezoelectric sensors
7061_002-027e-09.18Page 6
2.2 Principle of operation
The sensor membrane converts the measured pressure
into a force which is applied to the piezoelectric measu-
ring element. In the piezoelectric crystal package this
force generates an electrostatic charge proportional to the
load. An electrode collects this charge and supplies it to
the sensor connector, then via the piezoelectric cable; the
chargeamplierconvertsthischargeintoanelectricvol-
tage for measurement and processing.
The piezoelectric principle is most suited for measure-
ments of fast, dynamic and quasi-static pressure changes
and thus plays a key role in engine pressure measure-
ments.
Fig. 2: Cross section of a piezoelectric water cooled
sensor

Preface
Page 77061_002-027e-09.18
2.3 Requirements to water cooling
The use of cooling system Kistler Type 2621 is highly
recommended. It is capable of supplying up to ten water
cooled piezoelectric sensors (depending on the heat load
created by the application) with the optimum quantity of
water, at the right pressure and constant temperature. This
facilitates measurements with absolute reproducibility and
best lifetime of the piezoelectric sensors.
Coolant temperature:
50 °C
Coolantowrate:
0.3 to 0.5 l/min
Coolant pressure:
1.7 ±0.2 bar
Coolant composition:
demineralized water according to VDE-Norm 0510
cooling uid additive BASF G30/G40/G48 or similar
product (do not mix with each other)
Mixing ratio: 1 part additive with 4 parts demineralized
water suitable for applications down to –9 °C
For more information refer to datasheet and instruction
manual of cooling unit Type 2621
Never connect the piezoelectric sensor to an open coo-
ling system with water from the mains supply. This water
source contains calcium and lime deposits and will ac-
cumulate inside the piezoelectric sensor –impacting the
sensitivity and even in the worst case, block the cooling
channel inside the piezoelectric sensor.
2.4 Precautions for water cooling
The water cooling system must be turned on before the
engine is started. The reason is that if the water cooling
system is turned on after the engine has been running for
a period of time, the piezoelectric sensor may be dama-
ged due to the low temperature coolant encountering the
hot piezoelectric sensor (thermal shock effect).
Do not start the water cooling system if the temperature
of the piezoelectric sensor is high.