Kistler 9212 User manual

Instruction
Manual
Load Cells -
High Impedance,
Charge Mode
Type 9212
9212_002
-721e-08.15

Instruction
Manual
Load Cells -
High Impedance,
Charge Mode
Type 9212
9212_002-721e-08.15

Foreword
Foreword
9212_002-721e-08.15
Thank you for choosing a Kistler quality product characterized
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 to the content without obligation to notify any
person or organization of such changes or improvements.
©2000 ... 2015 Kistler Group. All rights reserved. Except as ex-
pressly provided herein, no part of this manual may be repro-
duced for any purpose without the express prior written consent
of Kistler Group.
Page 1

9212_002-721e-08.15Page 2
Load Cells - High Impedance, Charge Mode
Content
1. Introduction.......................................................................................................................................4
2. Important Information ......................................................................................................................5
2.1 For Your Safety.......................................................................................................................5
2.2 Precautions ............................................................................................................................6
2.3 Disposal of Electronic Equipment...........................................................................................6
2.4 Product Types ........................................................................................................................7
2.5 Nomenclature.........................................................................................................................7
3. Product Description .........................................................................................................................8
3.1 Supplied Mounting Studs .......................................................................................................8
4. Technical Information, Functional Description .............................................................................9
4.1 Piezoelectric Measurement Concept......................................................................................9
4.2 High Impedance Output .........................................................................................................9
5. Mounting & Installation..................................................................................................................10
5.1 General.................................................................................................................................10
5.2 Surface Preparation .............................................................................................................10
5.3 Mounting...............................................................................................................................10
6. Operation.........................................................................................................................................12
6.1 Charge Mode Load Cells and Charge Ampliers .................................................................12
6.1.1 The Charge Amplier ..............................................................................................12
6.1.2 Charge Amplier Operation ....................................................................................13
6.1.3 Kistler Charge Ampliers ........................................................................................15
6.1.4 Cable Considerations .............................................................................................15
6.1.5 Drift Due to the Charge Amplier ............................................................................17
6.1.6 Load Cell Start-Up with Charge Amplier ...............................................................19
7. Calibration & Maintenance ............................................................................................................20
7.1 General.................................................................................................................................20
7.2 Troubleshooting....................................................................................................................20
7.3 Repairs.................................................................................................................................20
7.4 Care & Cleaning...................................................................................................................21
7.5 Calibration ............................................................................................................................21

Page 39212_002-721e-08.15
Content
Total pages: 25
8. Recommended Cables...................................................................................................................22
9. Storage & Transit Considerations.................................................................................................23
10. Warranty ........................................................................................................................................24
11. Appendix .......................................................................................................................................25

9212_002-721e-08.15
Load Cells - High Impedance, Charge Mode
Page 4
Thank you for choosing a quality product from Kistler. Please
read through this manual thoroughly to enable you to fully
exploit the various features of your product.
To the extent permitted by law Kistler accepts no liability if
this instruction manual is not followed or products other than
those listed under Accessories are used.
These instructions describe Kistler Type 9212 high impedan-
ce, charge mode load cells.
Performance features at a glance:
High impedance, charge mode
Rugged quartz force-sensing element guarantees long-
term stability
Wide measuring ranges for compression and tension
Quasi-static response
High operating temperature range: –240 ... 150 °C
[–400 ... 300 °F]
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
torque
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, in addition to our
detailed data sheets, will provide you with an overview of our
product range. All unit measurements provided are listed in
order of meters, followed by inches [in brackets].
If you require additional assistance beyond what can be loca-
ted online or in this manual, please contact Kistler‘s extensive
support organization or visit us online at www.kistler.com.
1. Introduction

9212_002-721e-08.15
Important Information
Page 5
2. Important Information
Compliance with local safety regulations, which may apply to
the use of power line operated electrical and electronic equip-
ment, is strongly recommended.
It is essential for you to review the following information,
which is intended to ensure your personal safety when
working with the acoustic emission sensors and contribute
toward a long-fault-free service life.
2.1 For Your Safety

9212_002-721e-08.15
Load Cells - High Impedance, Charge Mode
Page 6
2.3 Disposal of Electronic Equipment
2.2 Precautions
Compliance with the following precautionary measures is
vital to ensure safe and reliable operation:
Check all equipment packaging for transporation damage.
Report any damage to the transporter and to Kistler.
The equipment should be used only under the specied ope-
rating conditions and must be protected against excessive
dust and mechanical stress (shock, vibration, etc.).
Avoid high atmospheric humidity, which can lead to conden-
sation during changes in temperature.
If there is evidence that safe operation is no longer possib-
le, the instrument must be powered off and rendered safe
against accidental start-up. Safe operation is no longer pos-
sible when the product
▪ shows visible signs of damage
▪ is no longer operating
▪ has been subjected to prolonged storage under unsuitable
conditions
Do not discard old electronic equipment in municipal trash.
For disposal at end of life, please return this product to the
nearest authorized electronic waste disposal service or
contact your Kistler sales ofce for disposal instructions.

9212_002-721e-08.15
Important Information
Page 7
2.4 Product Types
This instruction manual summarizes Kistler Type 9212 high
impedance, charge mode load cells. Please reference the
corresponding data sheets for each type for more detailed
specications.
Series Type 9212
Fig. 1: Series Type 9212 load cell appearance
2.5 Nomenclature
Table 1: Manual nomenclature
Throughout this manual, special designations and
nomenclature are used for terms and concepts relating to
load cells. These are identied in Table 1.
Term Definition
Fs Full-scale
pC picoCoulomb, a unit of electrical charge equivalent to
1 X 10-12 Coulomb

9212_002-721e-08.15
Load Cells - High Impedance, Charge Mode
Page 8
3. Product Description
Kistler load cells are compact, sensitive and fast response
sensors for measuring dynamic and short-term static forces.
Both compression and tension forces can be measured.
Typical applications include measuring fatigue-test tension,
rocket engine thrust, clamping force and forces transmitted
by vibration exciters. In simple terms, this unit could also be
described as a force probe.
These load cells are designed for bottom surface mounting
with an upper force application surface. The units differ in
conguration by the location of the cable connector. Series
Type 9212 feature the connector positioned radially. This
latter conguration, along with a low threshold and 2 260 kg
[5 000 lb] measuring range, simplies widely conducted drop-
testing by measuring forces instead of shock levels.
A self-generating piezoelectric sensing element is used
internally to produce a charge output. As with most high
impedance, charge mode sensors, the sensitivity of these
load cells is expressed in terms of the ratio of the electrical
output to applied force (i.e. –pC/lbf or –pC/N).
Being a high impedance device, a charge amplier and low
noise cabling are required.
Charge ampliers are available in several forms. Desktop
and rack mount units usually offer extensive operator
convenience for range selection, different time constants
and signal ltering. Miniature in-line versions in single and
multiple channels are useful where load cells are remotely
located or in industrial environments. While the use with
Kistler charge ampliers is always preferred, other models
can be used. A typical measuring system is shown in Section
4.2, while a summary of Kistler charge ampliers is included
in Section 6.1.3.
3.1 Supplied Mounting Studs
The following supplied mounting studs are listed in Table 2.
Load Cell
Type No.
Item Description Qty. Kistler
Part No.
9212 Mounting stud, threading –
10-32 to 10-32 2 8402
Table 2: Supplied mounting studs