Related Manuals for Kistler K-SHEAR 8702B Series
Summary of Contents for Kistler K-SHEAR 8702B Series
- Page 1 Instruction Manual Single-Axis K-Shear- Accelerometers Types 8702B..., 8704B..., 8728A..., 8730A... ä Single-Axis PiezoStar Accelerometers Types 8703A..., 8705A..., 8712B..., 8715A... ä 002-086e-01.19...
- Page 2 Instruction Manual Single-Axis K-Shear- Accelerometers Types 8702B..., 8704B..., 8728A..., 8730A... ä Single-Axis PiezoStar Accelerometers Types 8703A..., 8705A..., 8712B..., 8715A... ä 002-086e-01.19...
- Page 3 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.
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Page 4: Table Of Contents
4.8 Mass loading effects ......................23 5. Operating instructions ........................24 5.1 Powering ..........................24 5.1.1 Using "Built-In" power sources................24 5.1.2 Kistler couplers .......................25 5.1.3 The constant current power supply/coupler ............25 5.1.4 Sensor power-up ....................28 5.1.5 Overload recovery ....................28 5.1.6 Supply voltage effects .....................29 5.1.7 Driving long cables ....................29... - Page 5 Content 5.1.8 Ground loops ......................32 5.1.9 Ground isolation ......................34 5.1.10 Frequency response limits ..................34 5.1.11 Frequency response definition and standards ............34 5.1.12 High frequency limitations ..................35 5.1.13 Low Frequency limitations - accelerometer ............36 5.1.14 Low frequency limitations - coupler and read-out instrumentation .......37 6.
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Page 6: Introduction
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 Single-Axis K-Shear Quartz and PiezoStar IEPE accelerometers. -
Page 7: Important Information
Important Information 2. Important information It is essential for you to review the following information, which is intended to ensure your personal safety when working with the K-Shear and PiezoStar Shear IEPE Accelerometers and contribute toward a long-fault-free service life. 2.1 For your safety This product has been manufactured in compliance with current valid safety regulations. -
Page 8: Precautions
2.3 Disposal of electronic equipment 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 office for disposal instructions. 002-086e-01.19... -
Page 9: Nomenclature
Important Information 2.4 Nomenclature Throughout this manual, special designations nomenclature are used for terms and concepts relating to K-Shear and PiezoStar Shear sensors. These are identified in Table 1. Term Definition Full-scale DC supply voltage (a/k/a compliance voltage) Bias voltage (from calibration certificate) Frequency in Hz Output resistance of the coupler Input resistance of the coupler... -
Page 10: Product Description
Sensor' design. Viewing an accelerometer’s data sheet requires a compatible Data Acquisition system or coupler, such as Kistler LabAmp Type 5165A... The Interface provides negative current excitation (reverse polarity), thereby altering the operating mode of the PiezoSmart sensor and allowing the program editor software to read or add information contained in the memory chip. -
Page 11: K-Shear Background
Product Description 3.2 K-Shear background The sensing assembly (see Fig. 1) consists of a center post, quartz piezoelectric crystals, seismic mass and a preload bolt. Since the unit is operated in a shear arrangement, it will sense motion perpendicular to the base. When the accelerometer is attached to a vibrating structure, the mass exerts a shear force on the quartz piezoelectric crystal. -
Page 12: Piezostar Background
Single-Axis K-Shear and PiezoStar Accelerometers 3.3 PiezoStar background Kistler PiezoStar accelerometers utilize the same basic con- struction as our K-Shear accelerometers except for one key difference. PiezoStar accelerometers utilize a new proprie- tary piezoelectric crystal which produces higher charge out- put when compared to quartz based accelerometers and also a have a higher operating temperature. -
Page 13: Accessories
1635C Type 1761B cable. 1511 Table 2: IEPE sensor/customer IEPE compatible DAQ and IEPE sensor and Kistler LabAmp measuring chains 3.5 Accessories All accelerometers designed for stud mounting are supplied with the appropriate studs. All accelerometers designed for screw assembly mounting are supplied with a mounting screw. -
Page 14: Studs
Single-Axis K-Shear and PiezoStar Accelerometers 3.5.1 Studs The following studs can be used with Kistler accelerometers: Type Used with 10-32 10-32 8402 8702, 8704 [0.10] [0.10] [0.28] 8410 10-32 8712 ¼–28 [0.08] [0.13] [0.25] 10.4 10-32 8411 8702, 8704 [0.11] [0.26]... -
Page 15: Adhesive Mounting Pads
Product Description THD. THD. Type Used with 8.89 Hex 8466K07 5-40 5-40 8730 [0.20] [0.30] [0.35 Hex] Table 5: Isolated mounting adaptor (dimensions in mm [in]) 3.5.2 Adhesive mounting pads Keeps adhesive material out of the tapped hole or stud and provides ground isolation. -
Page 16: Triaxial Mounting Cubes
Single-Axis K-Shear and PiezoStar Accelerometers THD. Type Used with 12.7 11.1 5-40 8450A 8730 [0.30] [0.50] [0.44] fem. 11.2 17.8 15.9 10-32 8702, 8703, 8704, 8452A [0.44] [0.70] [0.62] fem. 8705 11.3 25.0 ¼–28 8456 8712 – [0.44] [0.98] male KIG4662 14.0 18.0... -
Page 17: Cables
Product Description 3.5.5 Cables All K-Shear and Piezostar accelerometers with detachable cables are furnished without cables. Refer to cable datasheet Ref. 000-471 for more details. Cables used with K-Shear and Piezostar accelerometers are summarized below. Type Description General purpose cable/connector. 10-32 pos. to BNC pos. 1761B... -
Page 18: Installation
Single-Axis K-Shear and PiezoStar Accelerometers 4. Installation This section provides the user with a quick means of placing the Kistler K-Shear or PiezoStar Shear IEPE accelerometers into operation. Careful installation will result in optimal, high frequency response, accuracy and reliability. Dimensional characteristics can be found on their respective data sheets. -
Page 19: Stud Mounting
32 micro inches (0.8 micrometers). 4.2 Stud mounting Type 8730A… is specifically designed for stud mounting. Most Kistler mounting studs are machined from Beryllium Copper for high strength and low modulus of elasticity, coupled with high elastic limits. The studs are removable, allowing both stud and adhesive mounting. -
Page 20: Direct Adhesive Mounting
Single-Axis K-Shear and PiezoStar Accelerometers Stud Type L1 mm [in] L2 mm [in] 8400K01 10-32 6.0 [0.24] 9.4 [0.37] 8400K03 4.5 [0.18] 8.0 [0.32] 8402 10-32 4.0 [0.16] 8.0 [0.32] 8410 10-32 4.0 [0.16] 8.0 [0.32] 8411 8.0 [0.32] 12.0 [0.47] 8412 5.0 [0.20] 11.0 [0.43]... -
Page 21: Mounting With Wax
4.4 Mounting with wax Bee's wax has been used as a mounting agent for many years. The provided Petro Wax (Kistler Type 8432 or P/N P102 from Katt and Associates; P.O. Box 623, Zoar, Ohio 44697, or equivalent) is a good replacement for bee's wax. It is formulated to provide improved frequency response. -
Page 22: Mounting With Magnet
5,000 g. Table 14 shows magnetic bases available from Kistler along with their characteristics. In order to achieve the specified holding strength, a thin grease film should be applied to the mounting surface. -
Page 23: Summary Of Mounting Methods
Installation 4.6 Summary of mounting methods Magnetic base Magnetic base Adhesive mounting Direct adhesive Isolated stud Stud mounting Probe with foil base mounting base mounting Mounting Accessory Type Advantages Disadvantages Remarks Method Probe Quick measurement Lower accuracy Magnetic base 8450A, 8452A, Easy &... -
Page 24: Securing Cables
Secure cables with a cable clamp. Tape is acceptable on temporary installations. Fig. 3: CORRECT cable strain relief Fig. 4: INCORRECT cable strain relief *See Section 3.5.5 for cables available upon request from Kistler. 002-086e-01.19... -
Page 25: Mass Loading Effects
Installation 4.8 Mass loading effects When a device such an accelerometer is attached to a test article, the acceleration to be measured will be altered. These effects can be reduced significantly by the proper selection of the measuring accelerometer. It should be assumed that the presence of an accelerometer does not significantly affect the system response, provided the dynamic mass of the accelerometer is considerably less than the test specimen. -
Page 26: Operating Instructions
Many FFT analyzers and vibration monitors are available with internal accelerometer power supplies that provide constant current power to Kistler and other low impedance piezoelec- tric sensors. These power supplies are typically known as constant current source supplies. The industry also recog-... -
Page 27: Kistler Couplers
Operating Instructions 5.1.2 Kistler couplers Kistler offers a comprehensive line of power supply/ couplers and dual mode amplifiers. They are designed for compatibili- ty with ceramic shear accelerometers. Please refer to Kistler Acceleration catalog ref. 900-380. 5.1.3 The constant current power supply/coupler To better understand the purpose of the current source, a review of the Piezotron impedance converter is in order. - Page 28 Single-Axis K-Shear and PiezoStar Accelerometers The source resistor (Rs), while located in the coupler, is part of the source follower circuit. In order for the Piezotron to pro- vide enough gain, Rs must have a high dynamic resistance while being able to provide enough current (low DC resistan- ce) as not to affect the high frequency response of the sys- tem.
- Page 29 Operating Instructions Fig. 8: Output signal when operated with 28 V supply Fig. 9: Example of output distorting and clipping when supply voltage is low 002-086e-01.19 Page 27...
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Page 30: Sensor Power-Up
Single-Axis K-Shear and PiezoStar Accelerometers 5.1.4 Sensor power-up When power is first applied to the sensor through an AC cou- pled coupler, a voltage will appear at the output of the cou- pler (see Fig. 10). As the coupling capacitor discharges, the DC output from the coupler will drop to zero Volts. -
Page 31: Supply Voltage Effects
Most laboratory instruments with built-in accelerometer power provide current in the range of 2 … 4 mA. Most Kistler couplers are set at factory default to provide 4 mA of source current. 4 mA is a fair compromise value for maximum frequency response and high reliability. - Page 32 Single-Axis K-Shear and PiezoStar Accelerometers Current (mA) Current (mA) Maximum Cable Length Required for Required for Frequency Ft (m) Output Signal Output Signal ±5 % ±1 V ±5 V 1,000 (300) 10 kHz 2,000 (600) 1,000 (300) 9 kHz 2,000 (600) 1,000 (300) 8 kHz 2,000 (600)
- Page 33 Operating Instructions Fig. 12: Maximum Piezotron current as a function of operat- ing temperature The equation for computing the maximum current for a spe- cific temperature is: = 0.16 (150 − T Nomenclature: I = Current in mA T = Temperature in °Celsius 002-086e-01.19 Page 31...
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Page 34: Ground Loops
Single-Axis K-Shear and PiezoStar Accelerometers 5.1.8 Ground loops The ground loop is one of the most common causes of ground noise. It will usually manifest itself as unwanted noise occurring at the line frequency (50 … 60 Hz). Ground loops occur when current flows between the accelerometer and coupler/conditioner grounds. - Page 35 Fig. 14: The current path is broken with the use of a ground isolation pad Fig. 15: Isolated accelerometer eliminates current path Kistler offers isolation mounting studs for non-isolated PiezoStar Shear accelerometers. See Section 3.5.1 for details. 002-086e-01.19 Page 33...
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Page 36: Ground Isolation
K-Shear and Piezostar Shear Accelerometers are specified with maximum variations of ±5 and ±10 %. Kistler uses the industry standard reference frequency of 100 Hz in the U.S., and 1,000 rads [159.2 Hz] internationally. Some users may be more familiar with the common frequency response standard for electronic equip- ment, which is generally ±3 dB. -
Page 37: High Frequency Limitations
Operating Instructions 5.1.12 High frequency limitations The inherent high frequency limit of an accelerometer is a function of its mechanical characteristics. PiezoStar Shear accelerometers can be represented as an undamped, single degree-of-freedom, spring-mass system. The spring constant is determined by the stiffness of the ceramic material and preload stud. -
Page 38: Low Frequency Limitations - Accelerometer
This results in an increase in low frequency response (frequency is the reciprocal of time). The low frequency limit of Kistler PiezoStar Shear acce- lerometers is defined as the point where the response is –5 % (also –10 % where specified) below the reference point (100 Hz). -
Page 39: Low Frequency Limitations - Coupler And Read-Out Instrumentation
Operating Instructions Fig. 17: Frequency and phase response of a PiezoStar Shear Accelerometers at low frequencies are dependent upon the time constant. 5.1.14 Low frequency limitations - coupler and read-out instrumentation When making low frequency measurements with PiezoStar Shear accelerometers, it is important for the user to consider the effects of the coupler and measurement instrumentation on the low frequency response. - Page 40 Single-Axis K-Shear and PiezoStar Accelerometers Using the formula τ = RC (readout instrument’s impedance = R), the lower the read-out instrument's input impedance (Z), the shorter the time constant, thereby degrading the low frequency response. In systems with AC bias decoupling, the time constant can be approximated by taking the product of the accelerometer and coupler time constants and dividing by their sum.
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Page 41: Technical Data
Technical Data 6. Technical data For detailed specifications, please refer to each sensor Type's corresponding data sheet or contact Kistler for more information. 002-086e-01.19 Page 39... -
Page 42: Calibration & Maintenance
Recalibration is recommended when returning an acce- lerometer to the factory. Kistler is an accredited ISO 17025 Laboratory and offers such calibration services. A calibration certificate will be supplied showing calibration results from standards traceable to NIST. -
Page 43: Troubleshooting
Kistler couplers are equipped with a bias monitor, which can be used to check the cable integrity and detect malfunctions in the accelerometer. Use the bias monitor as follows ƒ... -
Page 44: Storage & Transit Considerations
Single-Axis K-Shear and PiezoStar Accelerometers 9. Storage & transit considerations If the instrument is to be stored or transported for an extended period of time, please follow these safety precautions: ƒ The temperature should be maintained between –20 °C and 60 °C (–4 °F and 140 °F). ƒ... -
Page 45: Warranty
Warranty 10. Warranty Please reference the Kistler Instrument Standard Product Warranty under Terms and Conditions for Sales and Service. 002-086e-01.19 Page 43... -
Page 46: Declaration Of Conformity
Single-Axis K-Shear and PiezoStar Accelerometers 11. Declaration of conformity DECLARATION OF CONFORMITY KONFORMITÄTSERKLÄRUNG / DÉCLARATION DE CONFORMITÉ Manufacturer Kistler Instrument Corporation Hersteller / Fabricant Amherst, New York 14228 USA declares that the product erk lärt, daß das Produk t / déclares que le... - Page 47 Declaration of Conformity DECLARATION OF CONFORMITY KONFORMITÄTSERKLÄRUNG / DÉCLARATION DE CONFORMITÉ Manufacturer Kistler Instrument Corporation Hersteller / Fabricant Amherst, New York 14228 USA declares that the product erk lärt, daß das Produk t / déclares que le produit Name / Miniature K-SHEAR®...
- Page 48 Single-Axis K-Shear and PiezoStar Accelerometers DECLARATION OF CONFORMITY KONFORMITÄTSERKLÄRUNG / DÉCLARATION DE CONFORMITÉ Manufacturer Kistler Instrument Corporation Hersteller / Fabricant Amherst, New York 14228 USA declares that the product erk lärt, daß das Produk t / déclares que le produit Name / Miniature K- SHEAR®...
- Page 49 Declaration of Conformity DECLARATION OF CONFORMITY KONFORMITÄTSERKLÄRUNG / DÉCLARATION DE CONFORMITÉ Manufacturer Kistler Instrument Corporation Hersteller / Fabricant Amherst, New York 14228 USA declares that the product erk lärt, daß das Produk t / déclares que le produit Name / Miniature K-SHEAR®...
- Page 50 Single-Axis K-Shear and PiezoStar Accelerometers DECLARATION OF CONFORMITY KONFORMITÄTSERKLÄRUNG / DÉCLARATION DE CONFORMITÉ Manufacturer Kistler Instrument Corporation Hersteller / Fabricant Amherst, New York 14228 USA declares that the product erk lärt, daß das Produk t / déclares que le produit Name / Miniature K-SHEAR®...
- Page 51 Declaration of Conformity DECLARATION OF CONFORMITY KONFORMITÄTSERKLÄRUNG / DÉCLARATION DE CONFORMITÉ Manufacturer Kistler Instrument Corporation Hersteller / Fabricant Amherst, New York 14228 USA declares that the product erk lärt, daß das Produk t / déclares que le produit Name / Miniature K-SHEAR®...
- Page 52 Single-Axis K-Shear and PiezoStar Accelerometers DECLARATION OF CONFORMITY KONFORMITÄTSERKLÄRUNG / DÉCLARATION DE CONFORMITÉ Manufacturer Kistler Instrument Corporation Hersteller / Fabricant Amherst, New York 14228 USA declares that the product erk lärt, daß das Produk t / déclares que le produit Name / Miniature K-SHEAR®...
- Page 53 Declaration of Conformity DECLARATION OF CONFORMITY KONFORMITÄTSERKLÄRUNG / DÉCLARATION DE CONFORMITÉ Manufacturer Kistler Instrument Corporation Hersteller / Fabricant Amherst, New York 14228 USA declares that the product erk lärt, daß das Produk t / déclares que le produit Name / Miniature K-SHEAR®...
- Page 54 Single-Axis K-Shear and PiezoStar Accelerometers DECLARATION OF CONFORMITY KONFORMITÄTSERKLÄRUNG / DÉCLARATION DE CONFORMITÉ Manufacturer Kistler Instrument Corporation Hersteller / Fabricant Amherst, New York 14228 USA declares that the product erk lärt, daß das Produk t / déclares que le produit Name / Miniature K-SHEAR®...
- Page 55 Declaration of Conformity DECLARATION OF CONFORMITY KONFORMITÄTSERKLÄRUNG / DÉCLARATION DE CONFORMITÉ Manufacturer Kistler Instrument Corporation Hersteller / Fabricant Amherst, New York 14228 USA declares that the product erk lärt, daß das Produk t / déclares que le produit Name /...
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Page 56: Total Pages
Single-Axis K-Shear and PiezoStar Accelerometers KONFORMITÄTSERKLÄRUNG / DÉCLARATION DE CONFORMITÉ Manufacturer Kistler Instrument Corporation Hersteller / Fabricant Amherst, New York 14228 USA declares that the product erklärt, daß das Produkt / déclares que le produit Name / Name / Nom PiezoSTAR®...
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