main product Sine Wave Impule Testing

Sine Wave Impulse Testing

The Sine Wave is another form of hydraulic impulse testing, which differs from the Damped Wave method in several ways. The waveform is created electronically by the use of a wave form generator, which is connected to an electronically controlled hydraulic valve located on the test machine. This produces a waveform that is more consistent and easier to reproduce from one test to another. The Sine Wave makes smooth transitions at the peaks, which enables its use at extremely high pressures, and has the capability of being run at a much higher frequency, thus reducing the test time required. APT has one test unit that can be used for Sine Wave Impulse Testing. This is a variable-wave Impulse machine suitable for qualification testing per AS4401 to 30,000 PSI. Custom built manifolds allow a wide variety of fittings and tube assemblies to be tested in an environmentally controlled chamber.

Hydraulic Test Unit

Sine Wave Hydraulic Test Unit

Sine Wave “Waveform”

Sine Wave Waveform

This is a fixed frequency Sine Wave “waveform” as seen on an oscilloscope. The lower waveform represents the input signal from the signal generator and the upper waveform represents feedback of the test signal from the transducer.

Temperature Chamber

Sine Wave Temperature Chamber

Another view of a temperature controlled environmental chamber with a liquid nitrogen feeder tank attached. Specific test parameters may require soaking at temperature before, at intervals during or after other mechanical testing.