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Dynamic Retention System ASTM

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Retention ASTM To test the efficiency of the helmet retention systems.
Designed and manufactured to meet EN1078, ASTM, CPSC, AS/NZS, BSI regulations and other standards. Operated by either Cadex Software or Touch screen controller technology.

  • Manual operation.
  • Electronic conditioner box reads displacement over time during the test.
  • Headform support can be raised or lowered up to 10 inches (25.4cm).
  • Powered by 115 VAC/60Hz or 220VAC/50Hz source.
  • Can be connected to a computer system in order to measure the real time displacement. Cadex Acquisition Software has been developed to monitor this signal system.
Dynamic retention system

  1. EN 960-Half-Magnesium K1A headform : Sold separately.

  2. Headform support.

  3. Strap attachment.

  4. The headform support can be raised or lowered up to 10 inches (25.4cm).

  5. The transducer device will read the real time displacement of the test sequence. It has a displacement capability of 0 to 15 cm and needs to be connected to the power conditioning unit of the machine. The transducer is the most sensitive and delicate part of the machine, which is why it was designed so close to the main frame. This will help protect it and minimize the chance of an accident during testing. The sensor comes with a calibration device that should be used to verify the accuracy of results.

  6. The handle command controls the pneumatic air cylinder in the back of the machine. It has a Up, Neutral and Down position and is used to modify the height of the release mechanism.

  7. The bottom pedal is used to move the guiding system UP. This makes it easier to remove or re-install the complete headform with helmet from the machine. It is also recommended that you remove the drop mass from the Up position with your pneumatic device (section 4, 11, 12) so you will have less weight to carry during this process.

  8. The drop mass weight (10 kg) is made out of steel, covered with non-corrosive plating to protect the device.

  9. The power conditioning unit of the sensor device. This unit needs to be connected to a 115 VAC/60Hz or 220VAC/50Hz power source. The sensor and the electronic conditioner box connect to this device. A BNC connector output is also required to connect to a computer system in order to measure the real time displacement. Cadex Acquisition software has been developed to monitor this signal system.

  10. The air entry outlet for compressed air. The machine will need to be connected to a compressor to work properly. The pressure should be between 80 PSI (min) and 150 PSI (max). That air entry device has a small container that accumulates water that is separated to avoid any moisture getting into the air line system of the machine. The container needs to be emptied manually, so it is important to keep track of the container's water level. Simply press the release water button on the water receiver bottle to have the water evacuate the device.

  11. The release mechanism of the machine is used to retain the drop mass of 10 kg in place before the test.

  12. The main frame of the drop carriage assembly guiding system of the machine. This section includes the bottom stopper support, long rod guide as well as the headform attachment. The complete main guiding support with all the parts that represent the preload of the helmet prior the test should be 15 kg (including the headform). To make sure that all headforms (regardless of size or weight) respect the 15 Kg specification, an additional ring that comes with each headform can be installed.

Controler box
Electronic controler box compatible with Cadex Aquisition Software.

  • Depth : 60 cm (23.6 inches).
  • Width : 48 cm (18.9 inches).
  • Height (adjustable) Min : 182 cm (71.7 inches).
  • Weight : 72.5 kg (160 lbs).
Cadex ISO