Vibration and Shock Testing
Vibration
Professional Testing has a very experienced group of test technicians are capable of handing a wide variety of shock and vibration profiles on big and small equipment. Professional Testing has one of the largest and most powerful independently owned vibration tables in Texas, which is complemented by a suite of Lansmont brand shock, drop, and vib equipment for package testing.
| Vibration Table 1 | Vibration Table 2 | |
| Model | Ling 335 VH | Lansmont 1800 |
| Type | Electrodynamic | Servo-Hydraulic |
| Frequency Range | 2Hz - 2kHz | 3Hz - 300Hz |
| Stroke (i.e. Displacement), (in) | 1.5 | 2.5 |
| Max Amplitude (lbf) | 18,000 | 10,000 |
| Max Dead Weight (lbs) | 1,000 | 1,300 |
| Orientation | Vertical and Horizontal | Vertical ONLY |
| Table Size | 2'x2' Vertical, 2'x5' Horizontal | 4'x4' |
| Bolt Hole Pattern |
How to prepare for testing? We have a guide that you can download with a complete checklist of how to prepare for testing here.
NOTE: The Ling machine does have a "cube" that sits on top of the vertical platform, and you can mount multiple product samples on each side with the goal of shaking all axes simultaneously. You can see the bolt hole patterns on the checklist here.
Shock
A shock profile is a g force pulse imposed on a device under test ("DUT") for a very short length of time under controlled conditions. The shape of this waveform can vary depending on the standards you’re testing to and the goals you have for product reliability. PTI has 2 methods of creating this pulse:
The Lansmont Shock Machine: This device allows for a freefall drop on a platform, and the duration / level / shape of the g force vs. time curve is modified by the height of the drop and the material used at impact. The machine can produce up to 600g’s and the pulse duration can vary from 2msec to 60msec. You can download the bolt hole pattern for affixing a sample to the machine here.
The Vibration Table can produce a single pulse. The stroke length is the limiting factor for both duration and level, but the main advantage of using the vibration table is you can repeat the shock tests quickly without resetting the machine.
Drop
PTI’s Drop machine allows for a repeatable way of testing both packaged and un-packaged products for durability. The machine works by pneumatically removing a platform out from under the product sample faster than gravity. This allows for a consistent drop on to a variety of surfaces including metal, wood, concrete, and carpet. The resulting g force can be recorded upon request. Additionally, the height is adjustable. This machine can drop up to 175 lbs from up to 72” in height.
