480 Garyray Dive
Toronto, ON
M9L 1P8
corvib@corvib.com
www.corvib.com

Resonant Frequency of Materials E-Meter
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E-Meter

Determines resonant frequencies of the three modes of vibration.
Enables the calculation of -

  • Youngs Modulus of Elasticity
  • Modulus of Rigidity
  • Poissons Ratio
  • Damping Constant

Frequencies are automatically scanned in one of four ranges. The system can determine flexural resonance of concrete under accelerated freezing and thawing cycles and aggressive environments.

 

E-Meter System Schematic -

Principle

The E-Meter measures the resonant frequencies of the three different modes of vibration-

  • Longitudinal
  • Transverse (flexural)
  • Torsional

From these, the following material characteristics can be calculated -

  • Youngs Modulus of Elasticity
  • Modulus of Rigidity
  • Poissons Ratio
  • Damping Constant

The principle used in the E-Meter is based upon the determination of the fundamental resonant frequency of vibration of a specimen by a Driver Oscillator, sensed by an Accelerometer and then amplified and Displayed on the E-Meter.

The E-Meter has a semi-automatic feature which eliminates cumbersome manual scanning. Frequencies are automatically scanned in one of the four ranges and the maximum amplitude is registered. The instrument automatically stops scanning at the beginning of the band containing the resonant frequency.

Different configurations of benches are available for smaller samples. As well, the standard bench accommodates samples for the three different modes of vibration.

 

Conforms to:
ASTM C-215 and C-666

Can be adapted to:
ASTM C-747 (Carbon and Graphite)
ASTM C-623 (Glass)
ASTM C-848 (Ceramic Whiteware)