Impact Tester

Schap Impact Testers are available in both Nitrogen-powered high-pressure and shop air Pneumatic options. The Pneumatic Impact Tester is intended to satisfy the requirements of FMVSS 201. The Nitrogen Impact Tester is intended to satisfy the requirements of FMVSS 222, and requires a cylinder of high-pressure nitrogen to reach the speeds required. Both include the mechanical test machinery and a separate, floor standing, P.C. based Control & Data Acquisition system, and require standard shop air and 120 VAC electrical power (other voltages available).

The machine consists of the impact stand mounted to a suitable bedplate and a freestanding control system. The impact stand can be mounted to a customer-supplied bedplate with a minor revision to the jackscrew assembly that raises and lowers the entire assembly. Test samples must be securely anchored before performing the impact test sequence.

To perform the test, an accumulator is pre-charged to a set pressure, as indicated on a large rotary pressure gauge and adjusted with a manual precision regulator. Once the exact charge pressure to achieve the required speeds is determined, it rarely needs readjustment. With the ram manually pushed back, the optional rebound latch unlocked, the optional rod lock clamped, and the accumulator charged, the system is ready to fire.

Firing requires a careful sequence of events to ensure the safety of the operator and any others in the area. Customers are free to install their guarding as required, or guarding can be designed by Schap, though the sequence of steps required should prevent accidental discharge and injury. Initially, the system requires an operator key to enable the firing sequence. A revolving red beacon begins to run when the charging starts. Once the system is charged, the firing sequence can be started on the P.C. A loud horn then goes off in short bursts and then goes continuous just prior to firing. A special screen on the monitor asks the operator to confirm the desire to fire and requires the holding of a key while a visual count-down timer runs out. Only then does the system fire.

Data acquisition is performed by a P.C. and captures the impact pulse from one or more accelerometers in the impact form. Data is then displayed graphically along with HIC, peak deceleration, speed at impact, and other impact parameters. The control system is programmed in .NET and operates in a Windows 7 operating system. Anyone generally proficient with standard P.C. functions would have very few problems learning to operate this equipment.


  • Mechanical components are constructed of non-corrosive Aluminum and Stainless Steel
  • Durable Powderer Coat and Anodized finishes
  • 1 year manufacturer's warranty



More Information






FMVSS 222