Rion VM-56, Instruction Manual, Page: 13 / 180

1
Outline
The VM-56 is the Tri-axial Groundborne Vibration Meter which is made
according to DIN 45669-1 and ISO 8041 for measuring ground-borne vibra-
tions in order to evaluate the effects on persons and/or on structures. Peak
particle velocity (PPV), vibration dose value (VDV), and other values (e.g.
displacement) which are calculated simultaneously can be stored to SD memory
card at user-specifi ed intervals, and can also be obtained via communication
interface (USB, RS-232C).
The VM-56 consists of the main unit and Vibration Pickup PV-83D. Hence
the system processes 3 channels of vibration signal, and allows real-time
analysis of each channels. Waveform recording as PCM format WAVE fi les
on SD memory card will be available if the WR program option is installed,
and recorded WAVE fi les make it easy to analyze later on a computer. The
main unit has separate X, Y and Z outputs of analog signal for connecting to
other devices (e.g. frequency analyzer), and it’s possible to check or analyze
the vibration signal on site.
In consideration of environment, size AA nickel metal hydride (Ni-MH)
rechargeable batteries can be used to help reduce the amount of battery
waste. The unit can be connected the external power supply for a long time
measurement.
Features
PPV, VDV and other values can be calculated simultaneously
Tri-axial data series can be stored in CSV fi le
Program option: Waveform recording, 1/3 octave real-time analysis
Visibility good LCD on site
SD/SDHC card (up to 32 GB) available for a long term measurement
USB/RS-232C communication interface (same as NL-42 series)
Rechargeable batteries(Ni-MH) available
Vibration monitoring using comparator function
Unifi cation of operability with NL-42 series