Vibration Comparator
VC-2100 featuring
2-Frequency band
with Peak Value Comparison
VC-3100 featuring 3-Frequency band
with Peak & Crest Factor Values Comparison
|
|
 |
The VC-2100/3100 vibration
comparator can be used in vibration measurement application in which vibration-based
judgment required such as go/no-go vibration measurement of product, facilities
diagnosis, machine tool cutting tool damage and so on. Combined with an
acceleration pickup, it may provide a full range of functions, from vibration
detection through measurement and diagnosis, in a single package.
By employing a digital signal processor (DSP) in the VC series vibration
comparator,
high-speed computation can be realized, using digital processing technology.
From the output signal of an acceleration sensor, the VC series simultaneously
detects and discriminates different frequencies in 2 bands (VC-2100) or
3 bands (VC-3100).
Furthermore, The VC series features "visual and audio" checking functions.
To check vibration levels, the VC series 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 "comparator gate input function" enabling only the necessary
vibration phenomenon can be extracted by controlling the timing signals
from a sequencer.
All of these functions are packed into a compact DIN size (96mm X 96mm).
|
Features
-
VC-2100 featuring 2-band judgment, based on
whether rms or peak value can be selected for each band
VC-3100 featuring 3-band judgment, based on whether rms, peak value or crest
factor 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, DC, Simultaneous)
-
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
-
Condition and data memory (VC-3100)
-
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 |
1.00x10-2 to
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 |
|
No. of bands |
VC-2100 |
2 (independent
of each other) |
|
VC-3100 |
3 (independent
of each other) |
Measurement
modes |
VC-2100 |
True
rms value, peak value, maximum rms hold, max. peak hold |
|
VC-3100 |
True
rms value, peak value, maximum rms hold, max. peak hold,
crest factor, crest factor hold |
|
Band filters |
VC-2100 |
-48dB/oct
Butterworth filter for both HPF and LPF
THR, 100, 300, 500, 1k, 3k, 5k, 10kHz |
|
VC-3100 |
-48dB/oct
Butterworth filter for both HPF and LPF
THR, 50, 100, 200, 300, 500, 1k, 2k, 3k, 5k, 10kHz |
|
Analog filters |
VC-2100 |
LOW cut
filter : HPF, 10Hz
HI cut filter : LPH, 1k,10kHz
(-18dB/oct) |
|
VC-3100 |
LOW cut
filter : HPF, 3 Hz, 10Hz
HI cut filter : LPH, 1k,10kHz
(-18dB/oct) |
|
Averaging |
VC-2100 |
not provided |
|
VC-3100 |
4, 6,
16, 32, 64 times, selectable |
|
| 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 |
|
Memory section
(on VC-3100 only) |
| Condition
memory |
5 kinds |
| Data
memory |
up to 500 data per
condition (for judgment result only) |
|
| RS-232C Interface |
VC-2100 : 9600 bps
VC-3100 : 9600/19200 bps, selectable |
| 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
|
DIN 96(W) x 96(H) x112(D)
mm |
| Options
|
| Integration |
VC-0251 (for VC-2100),
VC-0261 (for VC-3100) |
| Single
additional Band |
VC-0252 (for VC-2100),
VC-0262 (for VC-3100) |
| Current
output |
VC-0253 (for VC-2100),
VC-0263 (for VC-3100) |
| Envelope |
VC-0264 (for VC-3100) |
| Crest
factor count |
VC-0293 (for VC-3100) |
| Low range
frequency band filter |
VC-0131 (for VC-3100) |
| Middle
range frequency band filter |
VC-0132 (for VC-3100) |
| High
range frequency band filter |
VC-0133 (for VC-3100) |
| Velocity
sensor filter |
VC-0136 (for VC-3100) |
|
|
