Benefits and Features

Dedicated measurement hardware for simultaneous measurement of each channel

Interfaces to any standard vibrating wire sensor

Eight simultaneously sampled channels per module; synchronized across multiple modules

Dynamic measurement rates of 20 to 333 Hz

Static measurement vibrating wire and thermistor measurements at 1 Hz

VSPECT spectral interpolation algorithms provide superior noise immunity and measurement resolution compared to time-domain period-averaging approach

Excitation method providing frequent low-energy pulses to maintain a continuous resonant vibration in the sensor

Onboard post-processing including frequency conversion, temperature conversion, and rainflow histogram calculation

CPI DAQ connection for channel expansion

USB 2.0 interface for PC-based operation

Technical Description

In addition to the dynamic vibrating wire measurement, the VWIRE 305 makes several auxiliary measurements. A static vibrating wire measurement is made once each second, along with the dynamic measurements, which provides finer measurement resolution and greater immunity to external noise sources. The VWIRE 305 includes a thermistor input channel paired with each vibrating wire channel, featuring high-precision 24-bit measurements at a 1 Hz rate. Unique to the VSPECT technology, a rich set of diagnostic parameters is provided with the vibrating wire data.

The VWIRE 305 has the capability to simplify post-processing of data by computing common values internally. Vibrating wire data can be reported as measured frequency or as the frequency squared with a multiplier and offset applied. The thermistor data is reported as resistance or is converted to degrees Celsius using the thermistor's Steinhart-Hart coefficients. The VWIRE 305 can also internally compile rainflow histograms from the final data and report the values at user-specified intervals.