ERUDITE MkIV

Used the world over to test concrete, Ceramics and refractories, Stone and rock, Carbon and graphite. It automatically measures fundamental resonant frequencies, longitudinal, torsional and flexural, damping constant. The Erudite can be used to determine dynamic modulus of elasticity, dynamic modulus of rigidity, dynamic Poisson’s ratio, ultrasonic pulse velocity.
  

Features

  • Automatic mode: For fast testing - automatically sweeps through a range of frequencies.
  • Manual mode: allows user to analyse waveforms on an oscilloscope and provides more control and flexibility in testing.
  • Battery-backed data storage of experimental results.
  • RS232 Serial port enabling direct connection to a PC or printer.
  • Sealed membrane switch panel for use in dusty and dirty environments.

Standardization

Resonant frequency tests are specified for various materials as follows:

Concrete:

  • BS1881: Part 209
  • ASTM C 215
  • ASTM C 666
  • JIS A 1127

Stone and rock:

  • EN 14146
  • International Society for Rock Mechanics ‘Suggested Methods for Determining Sound Velocity’

Ceramics, refractory materials and glass:

  • ASTM C 623
  • ASTM C 848
  • ASTM C 885

Carbon and graphite:

  • ASTM C 747

Technical Data

Measurement Ranges

  • Frequency range: 1Hz to 100kHz
  • Frequency resolution:
    1-99.99Hz = 0.01Hz
    100-999.9Hz = 0.1Hz
    1000-9999Hz =1Hz
    >10kHz =10Hz
  • Output voltage: 0 to 2V pk-pk into 3W load
    (0.707V R.M.S. into 3W, 1.5W).
  • Output monitor: 0 to 2V pk-pk from BNC socket on rear panel for oscilloscope ‘X’ input.
  • Input monitor: 0 to 2.5V pk from BNC socket on rear panel for oscilloscope ‘Y’ input.

Display

Frequencies, voltages and option menus, displayed on a 20 character x 4 line liquid crystal display.

Keypad

16 key sealed membrane, for entering data and control parameters.

Drivers

  • Contact vibrator for large mass specimens.
  • Electro-magnetic air gap driver for small mass specimens.

Vibration Sensors

  • Miniature accelerometer for large mass specimens.
  • Electro-magnetic air gap receiver for small mass specimens.
  • Surface mounting accelerometer for transverse mode tests.

Environmental

  • Power supply: 110/230V, 50/60Hz single phase AC (user selectable)
  • Operating Temperature Range: 0°C to 40°C
  • Packaging (std kit only): 3 cartons.
  • Weights: Net 27kg, Gross 32kg, Volumetric 40kg