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The CF-4500 FFT comparator can make OK/NG judgment and quality
inspection accurately by analyzing the frequency signal of sound
or vibration from products or parts on production lines.
Measuring sound or vibration is popular as an effective method
for quality control of products having driven section such as a
motor. To ensure higher quality, needs for finding and capturing
characteristic signals have been increasing as well as sound or
vibration level in recent years. As being incorporated our
accumulated FFT technology over the years, the CF-4500 enables
OK/NG judgment by extracting caused and characteristic frequency
component.
The CF-4500 provides three newer functions in addition to [Block
comparator function] which can make OK/NG judgment by
characteristic frequency level in signals. [Shape comparator
function] enables OK/NG judgment by using signal form. [Tracking
function] can also make OK/NG judgment even though rotational
speed is changing. You can check abnormal sound by your ears
with [Band-pass filter & monitor function]. The combinations of
these judgment functions greatly help in higher quality
improvement and working effectiveness at production site. |
Features
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Up to maximum of 20 blocks can be
specified as judgment area in characteristic frequency signal levels.
The judgment method can be setup for each block.
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Three kinds of OK/NG judgment function
allow precise inspection of various products. In addition to [Block
comparator function], [Shape comparator function] (option) can make
OK/NG judgment by signal waveform. [Tracking function] (option) enables
OK/NG judgment by capturing changes of specified order level even though
rotational speed is changing.
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Also, an operator can make judgment
while checking characteristic abnormal sound by him/her own ears
thorough headphones with [Band-pass filter & monitor function] (option).
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Incorporation of a 6.5-inch color LCD
touch panel has enabled easy reading of measuring waveform or judgment
result. Moreover you can specify judgment area only by touching and
dragging your finger on a screen.
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As USB interface is equipped with the
CF-4500, measurement data or judgment result can be managed in a PC by
means of copying those data in USB memory.
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In view of measurement on production
line, the CF-4500 has battery backup function (option) which enables
closing the application normally in case of going down a main power or
instantaneous power failure.
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Block comparator
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Block comparator is the function which makes OK/NG judgment
whether a focused signal peak value or level goes within the
specified conditions in the block area. Block area is specified
by the range of fixed frequency and upper/lower-limit of level
range (20 blocks max). Five kinds of judgment method (level,
peak level, peak max, section over all, and area content rate)
can be setup for each block. You can setup judgment block by
touching and dragging on a screen or numeric input on a list. A
setup block can be moved right to left or up and down by cursor
key. |
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Shape comparator
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Using shape comparator function, you can make OK/NG judgment by
a shape of signal waveforms. Sometimes it is not easy to judge a
subtle difference in signal waveforms of sound or vibration etc.
even though frequency analysis is performed. This function
allows judgment of subtle difference in waveform by setting up a
judgment line along the shape of signal waveform. A judgment
line is setup by connecting points which are optionally
specified.
(Option: CF-0452 Shape comparator function) |
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Shape comparator of tracking
waveform
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For sound or vibration
measures of rotating equipments, it is important to measure or
analyze which rotational speeds increase sound or vibration and
which parts of rotating machine cause sound or vibration. The
CF-4500 FFT comparator can follow up a change of rotational
speed and extract a component of sound or vibration which is
based on rotation, and then make OK/NG judgment by its level or
changing situation. LG series or MP series rotational sensors by
ONO SOKKI can be connected directly to input signals of
rotational speed.
(Option: CF-0451 Tracking function + CF-0452 Shape comparator
function) |
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Band pass filter & monitor function
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Abnormal sound from products has been inspected by using
stethoscopic probes as a sensitive evaluation. With the CF-4500,
you can setup frequency band of abnormal sound over optional
specified filter while hearing the abnormal sound through
headphones.
(Option: CF-0453 Band pass filter & monitor function) |
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Overview Specification
■ Input section
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Number of channel |
1 channel |
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Type |
Single-ended |
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Connector |
BNC |
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Input impedance |
100 kΩ |
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Input coupling |
AC (0.5 Hz/-3 dB) / DC selectable
(AC is automatically set up when CCLD is used.) |
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Kind of signal |
Voltage/CCLD (4 mA +24V: TEDS Ver. 1.0 or later) |
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Voltage range |
10 mV rms to 31.6 Vrms, 8 ranges |
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Dynamic range |
90 dB （at 1 Vrm range） |
■ Filter section
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HPF/LPF filter |
HPF:1 Hz,
10 Hz（-18 dB/oct）
LPF:1 kHz, 10 kHz（-18 dB/oct）
(HPF:10 Hz/LPF:1 kHz conforms to vibration severity
standards.） |
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Frequency weighting |
A/C（JIS C
1509-1 Class1, IEC 61672-1 Class 1） |
■ Analysis section
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Frequency range |
1 Hz to 40
kHz, 19 ranges |
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Sampling point |
512/1024/2048/4096 |
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Real-time frequency range |
20 kHz |
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Processing function |
Time domain: Time axis waveform
Frequency domain: Power
spectrum, Fourier spectrum, 1/1 & 1/3 octave (compound) |
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Frequency axis waveform
processing |
1/jω, 1/jω2, ×jω, ×jω2 |
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Averaging |
Times (1 to
8192 times), or time (0.1 to 100 seconds) |
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Averaging type |
| Frequency
domain |
Summation
averaging, Exponential averaging, Peak hold, Max Over All |
Time domain
Amplitude domain
Phase spectrum |
Summation
averaging |
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■ Block comparator
section
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Waveform type |
Power spectrum, octave (1/1, 1/3), order spectrum |
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Maximum allowable number
of blocks |
20 |
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Judgment method |
Peak Level, Peak Max, OA, POA, area content percentage, Level
(Can be specified a judgment method for each block.) |
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Judgment criteria |
AND or OR of specified all blocks |
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Judgment mode |
Continuous mode, single mode |
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Automatic data saving function |
Data is automatically saved all measurement results or only when
the comparator result is NG. |
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Judgment output |
Overall judgment and individual judgment of up to five specified
blocks or shape. |
■ Displaying section
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Display |
6.5-inch
TFT color LCD (640 x 480), touch panel |
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Waveform display mode |
Single
screen, Dual screen, overwriting |
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Waveform display function |
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Unit of Y axis |
m/s2,
m/s, mm, μm, Pa, dB, V, Vrms (auto unit conversion by
differential and integral calculus) |
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Y axis scale |
Rms, 0-p,
p-p |
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Unit of X axis |
Hz, ORD,
r/min, s（sec） |
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X axis scale |
Default/expand display function |
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List display |
40 points
(peak value, harmonic or optionally) |
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Comparator judgment display |
List display of comprehensive judgment (OK/NG) or individual
judgment for each block |
■ Memory section
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Format of screen data |
DAT, TXT, BMP, TRC |
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Number of condition memories |
50 max |
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Contents |
Measurement condition, comparator condition (block or shape
setting, judgment condition etc.) |
■ Interface section
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Digital I/O |
9 kinds of input, 9 kinds of output :open collector (shared
common) |
Input function
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The function can be available by assigning the following
functions to each terminal.
- Control by assigned command (9 kinds max.)
- Selection from 4 kinds of judgment block
- Selection from 15 kinds of panel condition
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Output signal
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Comp-BUSY, OK, NG, ERROR
Individual judgment output (optionally selectable from five
items) |
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USB |
USB 2.0 high speed, terminal for USB memory, terminal for mass
storage class |
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For control |
LAN, RS-232C |
■ General
specification
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Power requirement |
24 VDC or exclusive AC adapter（100 to 240 VAC, sold separately） |
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power consumption |
40 VA（when 24 VDC）, 60 VA (AC adapter in used） |
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Operating temperature rang |
0 to 40 ℃（with no condensation） |
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Outer dimension |
149 (H)×220 (W)×250 (D) mm not including protruded section |
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Weight |
Approx, 3.3 kg |
 Options
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CF-0451 Tracking function
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Type |
Constant width / constant ratio |
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Schedule |
Rotational speed / time |
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Maximum analysis order |
6.25, 12.5, 25, 50, 100, 200, 400, 800 |
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Processing function |
Maximum amplitude order, POA, Order Peak, Order Band |
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External sample / rotational sensor input section |
BNC or R03-R6F（Please specify at the time of order.）
BNC: Voltage/TTL
R03-R6F: Used for rotational sensor input. (LG-916, MP-981 etc.,
power supply for rotational sensor input at 12 V, 0.1 A.) |
■ CF-0452 Shape comparator
function
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Type of waveforms |
Time-axis waveform, power
spectrum, octave (1/1,1/3), order spectrum, tracking plot |
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Maximum number of standard
lines |
20 lines |
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Judgment method |
Specifying the range between two standard lines
Specifying the level by one standard line |
* The specifications of judgment mode, automatic data
saving function and judgment output are same as block comparator’s
specification.
■ CF-0453 Band pass filter &
monitor function
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Specified frequency range |
HPF, LPF: 50 Hz to 10 kHz（-24 dB/ oct） |
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Monitor output connector |
φ3.5 mini jack |
■ CF-0454 Envelope & filter
function
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Envelope method |
1 kHz Low pass filter method |
* CF-0454 Envelope & filter function includes functions
of CF-0453 Band pass filter & monitor.
■ CF-0458 Power source backup
function
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Functions |
- Main body of CF-4500 can be stopped in an orderly manner
at the time of power line off.
- Main body can be startup automatically by the setting
which has been selected at the time of power line on.
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Model name |
Product name |
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CF-4500 |
FFT comparator |
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CF-0451 |
Tracking function |
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CF-0452 |
Shape comparator function |
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CF-0453 |
Band pass filter & monitor function |
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CF-0454 |
Envelope & filter function |
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CF-0458 |
Power
source backup function |
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CF-0459 |
Panel
protection cover |
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CF-0702 |
Stylus pen |
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AC adapter （PS-P20018A） |
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Power cable
for 120 V （VM0600-VM0299A）2 m |
* CF-0454 includes
CF-0453 band pass filter & monitor function.
* The number of rotational pulse input of CF-0451 tracking function can be
selected from BNC or rotational sensor input.
Revised: 2011/06/28
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