Part number 9304

VR9304

Record Transient Events

Transient Capture offers a simple interface to record transient events. Before running the test, define the trigger parameters, including the level required to trigger, the slope criteria, and the capture window. When following a test standard, set the parameters such as pulse type, alignment, and tolerances to define the ideal pulse. Available shapes include half-sine, initial-peak, terminal-peak, triangle, trapezoid, square, and haversine.

Transient Capture is typically used with drop shock machines. Common applications include package testing, product life testing, and pass/fail product testing.

Additional features:

• Record 524,032 samples (64-bit version) or 65,280 samples (32-bit version)
• Set a hold-off period to ignore any triggers after the desired captured event
• Apply digital filters, such as anti-aliasing, to the input waveforms
• Enable MIL-STD constraints on the pulse
• Set tolerances outside the range of the pulse definition

Simple Independent Triggers

Any combination of the front panel input channels can be selected as a trigger channel. Data are collected from all active channels. The acquisition can also be triggered using a device such as a switch or photo-electric by connecting the triggering device to a channel other than the collection channel.

Open Loop Output

Use the open-loop output to drive a modal shaker (optional). Output types include linear chirp, exponential chirp, and burst random.

ObserVR1000 Compatibility

Transient Capture can function as data acquisition software with the ObserVR1000. The ObserVR1000 is a portable dynamic signal analyzer used for field recording of vibration data. It offers autonomous control capability with the VR Mobile application.

Transient Capture Webinar

Shock Response Spectrum Analysis (Optional) VR9302

Define the breakpoints of a demand SRS trace. Then, analyze the SRS of each pulse as it is captured.

What is the SRS?

Originally designed to evaluate structural responses to an earthquake, the SRS is a valuable tool for testing environments with complex transient shocks. Engineers use an SRS test to evaluate a device’s response to a transient event likely to occur in the end environment.

An SRS vibration test generates more complex shock pulses than a classical shock test. To generate a specific SRS response, engineers often synthesize one of several standard synthetic waveforms such as burst random or WavSyn. Read more: Characteristics of SRS Waveforms.

The SRS can be used to:

• Describe a transient event in general terms
• Estimate the damage potential of an event
• Design structure resonances
• Define test specifications (particularly for seismic tests)
• Replicate failure modes

Transient Capture with VR Mobile Triggering

With the VR Mobile triggering feature, users can set up the autonomous acquisition of transient events. To do so, they can define a triggering event based on the measured values of a specified input channel. If multiple channels are selected for a single event, and the threshold value on one channel is exceeded, the event will be triggered.

This triggering event is based on peak measurement and is useful when the engineer only wants to record extreme conditions such as transient shock.