Rion VM-55, Instruction Manual, Page: 13 / 204

1
Outline
The VM-55 is a vibration level meter compliant with the requirements of
the Measurement Act and of the Japanese Industrial Standards for Vibration
Level Meters (JIS C 1510:1995, JIS C 1517:2014).
The unit is designed mainly for measuring ground vibrations in order to
evaluate vibration pollution. It can measure vibration levels in the vertical and
horizontal plane and display values weighted according to human vibration
sensitivity characteristics. The system consists of the main unit and the 3-axis
accelerometer PV-83C.
The VM-55 is equipped to measure the vibration level and vibration acceleration
level as well as the time percentile level, equivalent continuous level, maximum
and minimum value in three axis. Measurement results data are stored on the
internal memory or inserted SD memory card of the unit.
By installing the Extended Function Program VX-55EX, functions such as
automated long-term continuous data recording on SD memory card and
comparator output can be added. Installing the Waveform Recording Program
VX-55WR provides support for waveform recording and installing the 1/3
Octave Real-time Analysis Program VX-55RT provides support for 1/3 octave
real-time analysis.
Separate X, Y, Z outputs can be connected to a level recorder, analyzer, or
data recorder. Communication with a computer is possible via the built-in
I/O connector and USB connector. Because the USB connector conforms to
storage specifi cations, the unit will be recognized as a removable disk when
connected to a computer.
The RS-232C interface allows sending measurement data to a printer.
The unit is designed for power saving, so operates continuously for up to 24 hours
on eight size AA batteries.
Also, in consideration of environment, nickel metal hydride rechargeable
batteries can be used to help reduce the amount of battery waste.
And the unit can be connected the external power supply for the long time
measurement.