Subscribe to Our Youtube Channel
Related Manuals for Kistler 6233B Series
Summary of Contents for Kistler 6233B Series
- Page 1 Instruction manual Pencil probe Type 6233B… for blast pressure measurement 6233B_002-708e-07.22...
- 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
Pencil probe Type 6233B… Content Introduction ..........................3 Important information ......................... 4 Warranty ..........................4 Disposal instructions for electrical and electronic equipment ..........4 Sensor ............................5 General functional description..................... 5 Application in air blast testing....................6 Measuring chain ........................6 Triggering methods ...................... -
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: Important Information
Pencil probe Type 6233B… 2. Important information 2.1 Warranty The equipment supplied by Kistler Instrumente AG Winterthur is covered by a warranty against faulty material and workmanship. This warranty extends 12 months from delivery date. When submitting warranty claims, the items of equipment... -
Page 7: Sensor
Sensor 3. Sensor The Type 6233B… pencil probes are designed to measure highly dynamic pressures in air blast testing. An integrated amplifier circuit (IEPE) converts the charge signal from the quartz sensing elements into a voltage output. This allows driving of long cables up to several hundred meters of length. -
Page 8: Application In Air Blast Testing
Pencil probe Type 6233B… and ground shock effects. In the highly dynamic setting of a blast test, the acceleration compensation of the sensing element additionally avoids erroneous signals caused by vibrations. The effects of thermal shock are small and may be minimized further by applying a thermal protection foil on the sensor membrane (refer to Section 4.2.4 of this manual). -
Page 9: Triggering Methods
Standard coaxial cables with a BNC positive connector configuration are used to connect the pencil probe to the IEPE coupler and / or DAQ system. Kistler cable Type 1601B… is recommended. If a standalone coupler is used, any high-speed DAQ system / transient recorder may be used to digitize and record the voltage signals. -
Page 10: Low Current Wire Around Explosive Charge
The trigger time is defined by the ignition signal. There may be a random delay to the actual explosion. Kistler recommends using the first method as described in the next section. 3.4.1 Low current wire around explosive charge A trigger wire with a low current is placed around the explosive charge. -
Page 11: Bandwidth Optimization
For simple and safe triggering of blast measurements, Kistler recommends using trigger box Type 2525A04 (refer to Section 4.5.1 of this manual). 3.5 Bandwidth optimization... -
Page 12: Cable Length And Excitation Current
Pencil probe Type 6233B… Fig. 5: Schematic of blast wave traveling across sensor membrane. The resulting low-pass filtering effect depends on the sensor diameter and the propagation velocity of the blast wave. Example: Side-on pressure p = 10 bar (145 psi) Velocity of blast wave v = 1000 m/s Diameter... -
Page 13: Coupler Bandwidth
Sensor Example: Signal amplitude V = 2.9 V Cable capacity C = 100 pF/m Cable length L = 100 m Excitation current I = 4 mA → f = 22 kHz I = 8 mA → f = 44 kHz Thus, there are several ways to increase the maximum frequency: ... -
Page 14: Installation And Operation
Pencil probe Type 6233B… 4. Installation and operation 4.1 General measurement setup The pencil probe must be aligned in radial direction to the center of the blast and ideally on the same height as the explosive charge. Fig. 6: Example of mounting setup Blast propagation physics have to be taken into consideration to define a suitable test setup. -
Page 15: Distance From Explosive Charge
Installation and operation 4.1.1 Distance from explosive charge The following factors need to be considered to define the best distance from the explosive charge: Ground reflections: For improved interpretation of measurement results, superpositions of ground reflections and other secondary blast waves should be minimized as much as possible. -
Page 16: Distance From Obstacles
Pencil probe Type 6233B… as possible. Depending on the distance from the explosive charge, the pencil probe should be placed high enough above ground so as to only measure the primary blast wave. Stability of fixation: Mobile pencil probe fixations such as tripods cannot be arbitrarily high due to the risk of falling over due to the blast wave. -
Page 17: Check Iepe Amplifier Circuit Using Hand-Held Power Supply / Coupler Type 5114
Please refer to the instruction manual of Type 5114 for detailed operating instructions. Fig. 8: Hand-held Kistler power supply / coupler Type 5114 4.2.1.2 Check measuring chain by lead burst test on sensor... -
Page 18: Check Measuring Chain By Small Explosive Charge
Pencil probe Type 6233B… 4.2.1.3 Check measuring chain by small explosive charge Prior to a large scale explosive test, it is recommended to perform a small scale life detonation to check the proper functioning of all measuring chains in the final measurement setup. - Page 19 Installation and operation Mechanical damping: Excessive ground shock may induce a signal superimposed on the pressure signal. Since the ground wave travels faster than the pressure wave in the air, a noisy signal is commonly seen shortly before arrival of the blast wave. The fixation needs to provide mechanical damping to minimize the effects of ground shock.
-
Page 20: Tripod Adapter Type 6550A10
Such an installation is most convenient for mobile use and variable test setups. It may be used equally on level and rough surfaces. The Kistler tripod adapter Type 6550A10 features a standard ¼-inch UNC thread (DIN4503 / ISO1222), which is compatible with most commercial tripods used for example in photography. -
Page 21: Pipe Adapter Type 6550A20
The Kistler type 6550A20 pipe adapter is recommended for simple attachment of the pencil probe to an extension pipe. Its shape is optimized to avoid reflection from the mounting setup. - Page 22 Pencil probe Type 6233B… Fig. 15: Pipe fixation cemented into the ground A longer extension pipe results in further delay of the pressure waves reflected by the mounting setup. However, misalignment with respect to the wave front induces significant bending of the extension. Go through the following steps to set up a pencil probe using pipe adapter Type 6550A20: 1.
- Page 23 Installation and operation 7. Connect pencil probe Type 6233B (left) to BNC signal cable and insert into pipe adapter (right) 8. Close pipe adapter with clamping block Type 6550A22 and apply two clamping rings Type 6550A50 using end cutting pliers (e.g. Type 6550A55) Ensure to close pipe adapter with clamping block Type 6550A22 prior to fixing the clamping rings.
-
Page 24: Thermal Shock Protection
Extensive flames, however, may destroy the cable connection. 4.2.4.1 Thermal protection foil Type 1191AAA10 Kistler offers Type 1191AAA10 Aluminum thermal protection tape to be applied directly to the sensor membrane. Since Aluminum is an excellent infrared reflector, this thermal protection solution reduces the effects of radiation shock by a factor of 10. -
Page 25: Cable Connections
Installation and operation Fig. 17: Dotted membrane pattern must be visible after application of thermal protection foil Type 1991AAA10 4.3 Cable connections The cable leading away from the sensor should be firmly attached to the sensor fixation by using tape. In close proximity of the blast, further cabling running along the ground may need to be covered by protective mats or fed through underground housings to avoid damage due to... -
Page 26: Triggering
The trigger box Type 2525A04 is powered using an IEPE coupler, same as the pencil probe Type 6233B itself. This coupler also subtracts the bias voltage from the trigger signal. Fig. 18: Kistler trigger box Type 2525A04 with trigger wire Type 2525AZ100 wrapped... - Page 27 Excitation current 4 mA Bias voltage 10.4 V On Kistler LabAmp Type 5165A, the bias voltage is automatically determined and subtracted. Trigger box 2525A04 is delivered in a storage case including two rolls of trigger wire Type 2525AZ100. There is also space for small items such as a side cutter and a lighter for removing the insulation coating (not included in the delivery).
-
Page 28: Maintenance And Calibration
Pencil probe Type 6233B… 5. Maintenance and calibration 5.1 Maintenance 5.1.1 Sensor The sensor is supposed to be protected from Overload by pressure: The specified pressure range of 350 bar should not be exceeded. Overload by temperature: The maximum ambient temperature of 257 °F (125 °C) should exceeded. -
Page 29: Calibration
Maintenance and calibration Fig. 20: Storage case Type Z21537: Note that the case is delivered without content. 5.2 Calibration Pencil probe Type 6233B… is calibrated in a two-step process: 1. The sensing element is quasi-statically calibrated using oil up to its maximum pressure range of 350 bar.
Need help?
Do you have a question about the 6233B Series and is the answer not in the manual?
Questions and answers