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Vibration Comparator
ONOSOKKI VC-2100

VC-2100 Image

By employing a digital signal processor (DSP) in the VC-2100 vibration comparator--the first attempt in this class of devices, we have achieved high-speed computation using digital processing technology.
From the output signal of an acceleration sensor, the VC-2100 simultaneously detects and discriminates different frequencies in 2 bands (extendable to 3 bands by option). This numerical data can then be managed using a personal computer. Thus, the single unit of VC-2100 provides the same functions as the two units of conventional vibration monitors, and the VC-2100 can also serve as a measuring instrument.
The VC-2100 features "visual and audio" checking functions. To check vibration levels, the VC-2100 offers a function that enables vibration to be heard by connecting headphones as well as on-screen numerical displays and bar graphs. Besides this, the VC-2100 also has the "comparator gate input function" that enables only the necessary vibration phenomenon to be extracted by controlling the timing signals from a sequencer. All of these functions are packed into a compact DIN size (96mm X 96mm).

Multi-functional and precise vibration monitoring has been made easy at a low cost for various fields including maintenance and 24-hour monitoring of production equipment.

Features

  • Simultaneous two-band judgment (based on whether rms or peak value can be selected for each band)
  • Digital display function (displays vibration levels in both numerals and a bar graph on the screen)
  • Analog output (Thru; AC: signal of each band; DC: rms value of each band)
  • Comparator gate input function enabling judgments to be made in automatic operation
  • Vibration check through human ears is possible by connecting headphones
  • Comparator delay time setting
  • Compact DIN size (96mm x 96mm)

Major Applications

  • 24-hour monitoring of production equipment and production lines
  • Detecting breakage of cutting machine tools
  • Diagnosis of rotating machine containing bearings, motors, and gears

Specifications Summary

Input section Number of input channels: 1
Signal input : Switched between an acceleration pickup with a built-in amplifier and a voltage signal
Input connector: Type C02 (BNC)
Sensor sensitivity setting 1.00x10-2to 9.99x102 mV/ms-2
Input range 0.1 to 5000 m/s2 (* depends on the sensor sensitivity)
Frequency characteristics 0.8Hz to 20kHz (±3dB), 2Hz to 15kHz (±0.5dB)
Display Backlit dot-matrix LCD
Measured value: 4 digits with bar graph display
Analysis section
Number of bands 2 (independent of each other)
Measurement modes True rms value, peak value, maximum rms hold,
maximum peak hold
Band filters -48dB/oct Butterworth filter for both HPF and LPF
THR,100,300,500,1k,3k,5k,10kHz
Analog filters LowCUT filter: 10Hz, HiCUT filter:1k,10kHz
(-18dB/oct)
Comparator output
Function Judgments made independently for each band according to the measurement mode.
Level setting 1 to 99% of the full-scale, settable in steps of 1%
Output Output when measured value is above or below the set level value.
Open-collector output (20mA at maximum)
Positive and negative logic output made simultaneously.
Operating time 100ms or less
Delay time setting None,0.5,1,1.5,2,3,4,5,6,7,8,9,10,15,20s
Output
Analog output Thru output : Amplified input signal
AC output : Signal after the band-filter processing
DC output : Rms value output

Rated output: ±5V (Thru,AC),+5V(DC)
Over output Output when over input range or over AD, etc.
Open-collector output (negative logic)
Other outputs Headphone output, CAL signal output
Interface RS-232C (9600bps)
Output terminals M3.5 free screw terminals
Power supply 22 to 26 VDC 160mA at maximum
Operating temperature and humidity 0 to +50°C 85%RH. (with no condensation)
Weight Approx.500g
Outer dimensions WxHxD DIN 96x96x112mm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



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