Manufacturers' Specifications

Vibrock v901

Transducers : PPV
Geophone transducer PPV pack : 3 orthogonally mounted geophones
Geophones : natural resonance is 4.5 Hz, frequency range 4.5 Hz to 250 Hz

PPV measurement ranges
Measurement in accordance with BS 7385
Velocity : 0.1 mm/s to 200 mm/s
Displacement : 0.009 mm to 1.6 mm
Acceleration : 0.01 g to 20 g

Transducers : VDV
Accelerometer transducer VDV pack : 3 orthogonally mounted accelerometers
Sampling rate : 1000 Hz
Accuracy of transducer : better than ± 5%

VDV measurement range
Measurements of vibration dose in accordance with BS 6472 and BS 7482 part 3 with automatic day/night change over. Both 30 second and 1 hour dose levels are recorded and the resultant 16 or 8 hour values calculated in the range 0.025 to 10 m/s^{- 1.75}

Modes of Operation :
Automatic triggering : from 0.1 mm/s to 200 mm/s Peak Particle Velocity (PPV)
Automatic full scale : from 0.1 mm/s to 200 mm/s Peak Particle Velocity (PPV)
Automatic record time : from 2 to 18 seconds
Trigger / Record : PPV / resultant or acceleration or displacement parameters.

Memory :
~ 300 blasts (depends on scan time) or 30 days continuous recording
Review of memory events : LCD

Keypad : enables site data to be stored
Instant readout of results : 4 line LCD
Download to PC : with supplied software and RS-232 cable

Batteries : 2 x 1.5 V "D" cells
Battery Life : based on laboratory conditions
24 hours on - 20 days
12 on / 12 off - 34 days
8 on / 16 off - 45 days
4 on / 20 off - 65 days
2 on / 22 off - 84 days

General :
Operating temperature : - 10 to + 50 °C
Storage temperature : - 10 to + 50 °C
Weight of instrument : 6 kg
Overall Dimensions : 380 mm wide, 310 mm deep and 60 mm high.