Kistler 6213B Instruction Manual
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Kistler 6213B Instruction Manual

Quartz high-pressure sensor
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Instruction
Manual
Quartz High-
Pressure Sensor
Type 6213B
6213B_002-022e-06.21

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Summary of Contents for Kistler 6213B

  • Page 1 Instruction Manual Quartz High- Pressure Sensor Type 6213B 6213B_002-022e-06.21...
  • 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 in the content without obligation to notify any person or organization of such changes or improvements.

  • Page 4: Table Of Contents

    Content Content Introduction ............................3 Description............................4 Introduction ............................4 Technical data (Table 1) ........................ 6 Explanations to the technical data ....................7 2.3.1 Measuring range ....................... 7 2.3.2 Calibrated range ....................... 7 2.3.3 Overload ..........................7 2.3.4 Temperature coefficient of the sensitivity ..............7 2.3.5 Rise time ..........................

  • Page 5: Introduction

    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 products other than those listed under Accessories are used.

  • Page 6: Description

    Quartz High-Pressure Sensor Type 6213B 2. Description Introduction The high-pressure sensor Type 6213B (Fig. 1) has been developed especially for interior ballistic measurements up to 10 kbar. It is also suitable for measuring dynamic and quasistatic pressures in hydraulic systems.
  • Page 7 – less than with the previous shoulder sealing high-pressure sensors Types 6201 … 6211. Fig. 2: Dimensions of the sensor Type 6213B and of the sealing part 6213B_002-022e-06.21 Page 5...

  • Page 8: Technical Data (Table 1)

    Quartz High-Pressure Sensor Type 6213B Technical data (Table 1) The technical data are described in more detail in subsection 2.3 below. Range 0 ... 10 000 Calibrated range (with reference sensor) 0 ... 10 000 Calibrated range (with deadweight tester) 0 ...

  • Page 9: Explanations To The Technical Data

    Description Explanations to the technical data 2.3.1 Measuring range The data stated hold good for the corresponding measuring range. 2.3.2 Calibrated range With the deadweight tester the sensor is calibrated only up to 8 000 bar. Testing up to 10 000 bar is done by comparative measurements with a reference sensor.

  • Page 10: Functional Principle

    Quartz High-Pressure Sensor Type 6213B Functional principle The pressure to be measured acts on the diaphragm, which converts it into a proportional force. This force is transmitted onto the quartz elements, which generate an electrostatic charge under load. A contact spring picks up...

  • Page 11: Typical Applications

    Description Typical applications Typical applications for the high-pressure sensor Type 6213B are all kinds of pressure measurements in hydraulic and ballistic systems. Only a short life may be expected if it is employed in hydraulic systems where steep pressure rises and numerous load cycles are encountered (e.g.

  • Page 12: Installation

    Quartz High-Pressure Sensor Type 6213B Installation General remarks In the course of time the various measuring rigs have given rise to an almost endless variety of installation modes. There are measuring rigs for:  cartridge chamber measuring  cartridge mouth measuring ...

  • Page 13: Proper Use Of The Seal

    For the recommended installation mode the steel seal ring Type 1100 supplied with the sensor must be used. This ring of chromium-nickel steel has been developed and patented by Kistler (see Fig. 6). Fig. 6: Seal ring Type 1100 6213B_002-022e-06.21...
  • Page 14 Quartz High-Pressure Sensor Type 6213B This seal ring acts similarly to an O-ring. The soft Cr-Ni steel is deformed plastically when the sensor is tightened, so that it seals against the measuring medium. The higher the pressure to be measured rises, the more the ring is pressed against the sealing surface (see Fig.

  • Page 15: Tightening Torque

    Installation Tightening torque Tightening torque for low-pressure applications. The relatively high tightening torque is necessary to guarantee a proper sealing over the entire pressure range. If the sensor is used for measuring low pressures, the tightening torque can be reduced according to the low pressure range.
  • Page 16 Quartz High-Pressure Sensor Type 6213B Fig. 8: Influence of long measuring bores Here the pressure peak (base width 80 µs) in a hydraulic system (water) versus the resonance frequency of a measuring bore of different length before the sensor is...

  • Page 17: Preparing The Measuring Hole

    Installation Preparing the measuring hole When producing the measuring hole it is essential that the threads are concentric with the bore and the sealing part is flat. This is assured without difficulty if the threads are cut in the same setup on the drill. It is enough to use a center point on an ordinary drill, enabling the tap to be centered when cutting by hand.
  • Page 18 In order to guarantee an optimum measuring accuracy, it is necessary to ream the sealing surface with the reamer Type 1300A23. The reaming procedure is described in detail in the following subsection 3.8. Fig. 10: Drilling instructions for mounting bore for Type 6213B Page 16 6213B_002-022e-06.21...

  • Page 19: Avoiding Installation Errors

    Installation Avoiding installation errors Fig. 11: Concave sealing part If the sealing part is made concave instead of flat, measuring errors will be unavoidable. Tests have revealed a sensitivity increase around 2 % with 0.02 mm concavity (x) on the sealing surface. The trouble is avoided by making the measuring bore exactly in accordance with the instructions in subsection 3.6 above.
  • Page 20 Quartz High-Pressure Sensor Type 6213B Assembling of the tool The actual reamer is assembled in our works, the swivel nut is hold on the reamer with a snap ring. The hex tube which is used as an extension can on one side slightly be deformed with a hammer.

  • Page 21: Firing With Thermal Protection

    With sensor Type 6213B the pressure can be indicated by up to 2 % too low (for ammunition 7.5x55). This temperature error can largely be avoided if the thermal protection is used.

  • Page 22: Thermal Protection Shield Type 6563A

    Quartz High-Pressure Sensor Type 6213B 3.9.1 Thermal Protection Shield Type 6563A The thermal shock error can be greatly reduced by protecting the front part of the sensor with a thermal protective plate Type 1181 and protection shield Type 6563A. The thermal protective plate Type 1181 lasts about 5 …...

  • Page 23: Grease Shield

    Installation 3.9.2 Grease shield Fig. 14: Grease shield No measuring errors could be ascertained in tests with silicone grease (Type 1051) up to a pressure <4 000 bar. For pressure >4 000 bar a measuring error of up to –5 % has seen detached.

  • Page 24: Different Measuring Rigs For Ballistics

    Quartz High-Pressure Sensor Type 6213B Different measuring rigs for ballistics Cartridge chamber measuring Cartridge chamber measuring yields the most information for the user during the powder burn-up, but it also involves the most care when drilling the cartridge cases and centering the case exactly.
  • Page 25 Different measuring rigs for ballistics To allow the cartridge case to seal without blow-by despite the hole in the cartridge chamber, the hole in the case is usually sealed with adhesive insulating tape. Fig. 16: bore gummed up The smaller the hole in the cartridge case, the higher the bursting pressure of the gumming.

  • Page 26: Case Base Adapter

    Quartz High-Pressure Sensor Type 6213B Case base adapter Mounting the sensor in a case base adapter is only possible with large caliber. This mounting mode yields – like the cartridge chamber measurement – information over the entire pressure profile. Use thermal protection (see subsection 3.9).

  • Page 27: Cartridge Mouth Measuring

    Different measuring rigs for ballistics Cartridge mouth measuring For cartridge mouth measurements which are mainly provided for small calibers, we recommend to use Type 6215 with the pertaining accessory. This rig is employed mainly for ammunition acceptance tests. It is much simpler than cartridge chamber measuring, because no work has to be done on the ammunition.
  • Page 28 Quartz High-Pressure Sensor Type 6213B The following safety precautions are therefore advisable:  Carry out test measurements with filter of high cutoff frequency (… 180 kHz).  Keep the dead volume between sensor and barrel as small as possible.  Work only with a thermal protective plate fitted, for protection against metal parts (volume reduction) and temperature.

  • Page 29: Measuring Pressure Anywhere Along The Barrel (Port Pressure)

    Different measuring rigs for ballistics 4.4 Measuring pressure anywhere along the barrel (Port Pressure) Fig. 20: Measuring pressure anywhere along the barrel (port pressure) In this measuring mode a dead volume – due to the connecting bore – before the diaphragm cannot be avoided.
  • Page 30 Quartz High-Pressure Sensor Type 6213B But in most cases measuring is done only after reaching the peak pressure (e.g. port pressure measuring). Fig. 22: Port pressure measuring compared with cartridge chamber measuring. Port pressure measuring with 10 kHz filter to eliminate pipe oscillations.

  • Page 31: Pressure Bomb Measuring

    Pressure bomb measuring is used to monitor current production of chemical propellant charges, and also in the development of these. Fig. 24: Sensor mounting: Type 6213B in a pressure bomb For pressure bomb measuring the sensor is usually not fitted straight into the housing but with an adapter, for better handling.
  • Page 32 The front sealing sensors Type 6213B (and Type 6215) are more suited for use in pressure bombs than the shoulder sealing Types 6201 … 6211. If Type 6213B or Type 6215 are employed together with the thermal protection shield Type 6563A or Type 6565A and the inserted thermal protective plate Type 1181, it is usually possible to do without any further thermal protection.
  • Page 33 Different measuring rigs for ballistics Adapters for high-pressure sensors must therefore be designed for minimal material stressing at the installation point (see Fig. 26). Fig. 26: Adapter causing minimal material stresses at installation point The following safety precautions are advisable for pressure bomb measuring: ...

  • Page 34: Operation

    Quartz High-Pressure Sensor Type 6213B Operation Basic circuit of a measuring rig A measuring facility consists primarily of the piezoelectric part, i.e. the quartz pressure sensor, a highly insulating low-noise connecting cable and the charge amplifier. This is supplemented by a non-piezoelectric part comprising display or recorder and/or a peak pressure indicator.

  • Page 35: Range Selection And Threshold

    1 000 bar. A 100-time overloading of the measuring range will not harm the charge amplifier. The threshold of the high-pressure sensor Type 6213B is around 0.02 bar. Measuring High-Frequency Phenomena...

  • Page 36: Measuring Quasistatic Phenomena

    Quartz High-Pressure Sensor Type 6213B Measuring quasistatic phenomena Purely static measurements over any length of time are not possible with the piezoelectric measuring principle. The time interval during which so-called quasistatic measurements can be performed depends on the insulation resistance of the sensor and its connecting cable, and on the properties of the charge amplifier employed.

  • Page 37: Calibration And Maintenance

    Calibration and maintenance Calibration and maintenance Calibration The sensor has been calibrated at the works. The calibration sheet is supplied with it. A duplicate may be requested any time. For internal ballistics pressure measurements, periodic recalibration may be advisable. The interval between two calibrations depends a great deal on the application.

  • Page 38: Recommended Preliminaries

    Quartz High-Pressure Sensor Type 6213B Recommended preliminaries  The sensor insulation resistance should exceed Ω  Apply a little Klüber grease Type 1063 to the sensor threads  Calibrate with the seal that will be employed later  Tighten with the torque appropriate to the used seal ...

  • Page 39: Aids For Calibration And Maintenance

    Calibration and maintenance Aids for calibration and maintenance Calibration aids: Hydraulic high pressure generator up to 7 000 bar Type 6905A Hydraulic pulse generator up to 4 000 bar max. Type 6909 Maintenance aids: Special high-pressure oil for hydraulic generator Type 1053 Special grease for sensor threads Type 1063...

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