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Kistler 9708A Series Instruction Manual

Low impedance voltage mode

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Load Cells
Low Impedance
Voltage Mode
9708A...
Types:
9712B...
9708_002-077e-04.04

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Summary of Contents for Kistler 9708A Series

  • Page 1 Load Cells Low Impedance Voltage Mode 9708A… Types: 9712B… 9708_002-077e-04.04...
  • Page 3: Table Of Contents

    ..................8 Mounting ..................8 Operation ..........................10 Powering ..................10 6.1.1 Using “Built In” Power Sources ................10 6.1.2 Kistler Couplers ..................10 6.1.3 The Constant Current Power Supply/Coupler ............11 6.1.4 Sensor Power-Up ..................14 6.1.5 Overload Recovery ..................
  • Page 4 Series 97XX Load Cell Page 3 Maintenance and Calibration ..................... 16 General ..................16 Trouble Shooting ..................16 Repairs ..................17 Cleaning ..................17 Calibration ..................17 Accessories ......................... 18 Cables ..................18 Appendix............................20 002-077e 4.04...
  • Page 5: Introduction

    Series 97XX Load Cell Page 4 1. Introduction By choosing Kistler load cells you have opted for an instrument distinguished by precision, long life and technical innovation. Please read these instructions carefully before installing and operating these instruments. Kistler offers a wide selection of measuring instruments and comprehensive systems including: •...
  • Page 6: Using This Manual

    We have endeavored to arrange these instructions in a manner that allows for easy location of topics of interest. Your Kistler representative is also available to assist with any questions.
  • Page 7: Manual Nomenclature

    Pound-force Table 1: Manual Nomenclature 3. General Description Kistler load cells are compact, sensitive, 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.
  • Page 8: Technical Information, Functional Description

    Certain trade names are have become more commonly used to describe the voltage mode, low impedance style of sensors, including load cells. Kistler was issued the patent for the original voltage mode, low impedance style, and called sensors with the impedance converter ...
  • Page 9: Installation

    Series 97XX Load Cell Page 8 atmospheres. The calibration factor for load cells are given in mV/lbf for the 9708A(X) and 9712B(X). The calibration factor for the 9708AE(X) and 9712BE(X) is mV/N. Figure 2: Diagram of a Low Impedance Load Cell System 1.
  • Page 10 32 thread for the 9708A(X) and 9712B(X). The 9708AE(X) and 9712BE(X) require a hole tapped for an M6 thread. The hole depth must be such that the stud will not bottom out. Table 2 indicates the Kistler order number for studs.
  • Page 11: Operation

    Type 5010B1 This series of bench type single channel charge amplifiers is the most versatile of the Kistler line as it is dual mode and can accept low impedance, voltage mode sensors as well. Push button, keypad controls for sensitivity, range, operate/reset, time constant and selectable filtering.
  • Page 12: The Constant Current Power Supply/Coupler

    It provides an ideal means to confirm sensor location or detect inoperative cables. Connects directly to the input of any Kistler coupler or any compatible power source. Output frequencies of 100 Hz or 1000 radians/second, sine or square wave with adjustable amplitude.
  • Page 13 Series 97XX Load Cell Page 12 Figure 7: Schematic Diagram Of A Simple Coupler Figure 7 shows a schematic of a simple power supply coupler for load cells. DC power is supplied from a 24 volt source such as a regulated power supply or batteries.
  • Page 14 Series 97XX Load Cell Page 13 28V(E 2-3V Required by current limiting circuit Impedance Converter cannot go below 2-3V Figure 8A: Output Signal When Operated With 28V Supply Low Supply Distortion and Voltage Clipping Occurs Figure 8B: Example of Output Distorting and Clipping when Supply Voltage is Low 002-077e 4.04...
  • Page 15: Sensor Power-Up

    Series 97XX Load Cell Page 14 6.1.4 Sensor Power-Up Figure 9A: Behavior Of The Output Signal During Power-Up When power is first applied to the sensor, (through an AC coupled coupler) a voltage will appear at the output of the coupler (See Figure 9A). As the coupling capacitor discharges, the DC output, from the coupler will drop to zero Volts.
  • Page 16: Driving Long Cables

    Most data acquisition and laboratory analysis instruments with built-in load cell power provide current in the range of 2 to 4 mA. Most Kistler couplers are set at the factory to provide 4mA of source current. 4mA is a good compromise value for maximum frequency response and high reliability.
  • Page 17: Frequency Response Limits

    Kistler Transducer Simulator type 5350 is ideal for this test. Some Kistler couplers are equipped with a bias monitor which can be used to check the cable integrity and detect malfunctions in the load cell. Use the bias monitor as follows: A.
  • Page 18: Repairs

    Calibration services are available from Kistler. Kistler acceptance test instrumentation is in conformance with MIL-STD-45662A. A calibration certificate will be supplied showing calibration results from standards traceable to NIST.
  • Page 19: Accessories

    Page 18 8. Accessories Cables Kistler recommends the use of the Type 1761sp(X) cable with load cells. The cable is available in standard and custom lengths. Cables with other connectors and other cables for interconnecting measuring system units are shown below.
  • Page 20: Appendix

    Series 97XX Load Cell Page 19 Appendix Specifications for Kistler load cells and related load washers, force links and low level force sensors plus many other instrumentation products are shown on the Kistler website www.kistler.com. This is a listing of information sheets and technical articles related to load cell applications.
  • Page 22 Fax +41 52 224 15 49 sales.export@kistler.com India Taiwan Kistler Instruments (Pte) Ltd. Kistler Representative Office in Taiwan India Liaison Office Room 9, 8F, No. 6, Lane 180 2B Century Plaza Sec. 6, Mincyuan E. Road 560/562 Anna Salai...

This manual is also suitable for:

9708b series9708a(x)9712b(x)9708ae(x)9712be(x)