CE

CF-4700 FFT Comparator


The CF-4700 FFT comparator is a pass/fail judgment machine used on production lines that is highly effective in accurate quality inspection by analyzing sound or vibration from products. As being incorporated our accumulated FFT technology over the years, the CF-4700 enables pass/fail judgment by extracting the amount of fluctuation of signal size focusing on a specific frequency band.


The CF-4700 comparator has newly adopted the Amplitude Modulation Component Extraction Function, besides inheriting the frequency level- or waveform shape-based judgment functions from the existing CF-4500 FFT model. The new function enables judgment on the basis of the amount of periodical fluctuation of extracted sounds or vibrations. This function is effective for making judgments on fuzzy creaks or chattering sound by a motor-driven device in operation. Moreover, two functions which are included in the Amplitude Modulation Component Extraction Function enable measurements such as 'monitoring of bearing vibrations' (by using the band pass filter and envelope functions), as well as 'auditory inspections of vibrations through headphones' (by using the monitor function which amplifies inaudible vibrations to audible sounds).

For users getting started on pass/fail judgment by frequency spectrum

The CF-4700 comparator comes with a new assist function that enables users to set a judgment range by a simple operation.
This assist function reads differences in levels of sounds or vibrations from passed and failed measurement data files respectively, which makes it easier to set a judgment range, even when conducting a pass/fail judgment by frequency spectrum for the first time.

Features
4 comparator functions make judgments of OK and NG products

The Block Comparator Function for pass/fail judgment from the level of characteristic frequency signal using a preset judgment block area.

The Shape Comparator Function for pass/fail judgment by waveform shape. (Option)

The Tracking Function for pass/fail judgment by capturing level variation in specified order while rotational speed is varied. (Option)

The Amplitude Modulation Component Extraction Function that enables pass/fail judgment by extracting the amount of periodical fluctuations in sound or vibration caused by buzzing or chattering. (Option)

Other functions

The Assist Function for setting the judgment block area from the difference between frequency characteristics of OK and NG products.

Accepts TEDS sensor for automatic unit calibration. (Accelerometer and microphone that conform to IEEE 1451.4 ver. 0.9 and ver. 1.0)

The Cable Disconnection Detecting Function for detecting cable disconnection or connector trouble automatically when using constant current line drive (CCLD) type sensor.

Measurement conditions and data can be stored on a USB memory.

An open collector output for the judgment results of total and individual blocks to PLC*. The main unit is controllable by command assignment (up to 9 inputs).

The Power Source Backup Function prevents loss of measurement data in case of a main power down. (Option).

* Programmable Logic Controller

Functions

1. Block Comparator (Judging by frequency level)

Illust(block comparator)

The Block Comparator Function makes pass/fail judgments using a block area which is set in a certain frequency and level range. The judgment is made in terms of whether a peak value or level of a target signal coincides with the conditions which are set in advance or not. 6 kinds of judgment methods (level, peak level, peak max, inside max, partial overall, areal content rate) are available for each block. The judgment block can be determined by drag operation at a touch of a screen or by directly entering a numeric value on a list screen.

Related function :

Block Comparator Function Standard

Assist Function Standard

2. Shape Comparator (Judging by shape of waveform)

illust(Shape Comparator)

The Shape Comparator Function makes pass/fail judgments by waveform shape. By setting a judgment line, this function enables pass/fail judgments on subtle variations in a time waveform or on differences in spectral shapes. In order to avoid misjudgment due to instantaneous noises in a time waveform, if the number of data exceeding the judgment level is equal to or smaller than a set value, they are assumed to be noises and can be excluded from the target data for the judgment

 

Related function :

CF-0472 Shape Comparator Function Option

3. Shape Comparator of tracking waveform (Judging by shape of waveform)

illust(Tracking Function)

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-4700 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 pass/fail judgments by its level or changing situation.

 

Related function :

CF-0472 Shape Comparator Function Option
CF-0471 Tracking Function
Option

4. Amplitude Modulation Component Extraction Function
(Judging by the amount of fluctuation of signal size in a specific frequency band)


 

Amplitude Modulation Component Extraction Function

The Amplitude Modulation Component Extraction Function is a preprocessing function to extract the amount of fluctuation of signal size in a specific frequency band. This function is effective for making judgments on abnormal sound or vibration stemming from fluctuations in signal size, and can be used as a preprocessing function for making pass/fail judgments on fuzzy creaks or chattering by a motor-driven device in operation. Also enables measurements such as 'monitoring of bearing vibrations' using the bandpass filter and envelope functions, and 'auditory inspections of vibrations through headphones' using the monitor function which amplifies inaudible vibrations to audible sounds.


 

Related function :

CF-0473 Amplitude Modulation Component Extraction Function Option

5. Power Source Backup Function (Effective countermeasure against accidental power failure)

Power Source Backup Function

At the production site, an instantaneous power failure or sudden large drop in the voltage of the production line's main power could occur accidentally. The Power Source Backup Function deactivates the CF-4700 in a normal manner in the event of a main power down of the production line. There is no need to prepare an uninterruptible power supply separately. Moreover, presetting of startup conditions helps a smooth restart at the time of power restoration. This function also allows for centralized power control of the production line. In other words, the CF-4700 can be turned on or off by mere operation of the control panel of the production line's main power.

 

Related function :

CF-0478 Power Source Backup Function Option

Front & Rear Panel

digital I/O TEDS

System Configurations

Application Examples

Unusual noise evaluation of door mirror operation
Irregularity in the rotation of a door mirror drive motor while it is opened or closed may generate unusual fuzzy noises having periodic fluctuation components. These noises can be detected by the amount of periodic fluctuation extracted by the Amplitude Modulation Component Extraction Function from the door mirror motion sound measured with the MI-1235 1/2-inch Measurement Microphone and the MI-3111 Microphone Preamplifier. Using the Amplitude Modulation Component Extraction Function it may be possible to make judgments on sounds that cannot be judged simply by the sound level.

Function used : CF-0473 Amplitude Modulation Component Extraction Function

Unusual noise evaluation of door mirror operation

Abnormal vibration diagnosis of bearings

Damage of bearings causes abnormal vibrations. The CF-4700 performs diagnosis of bearings by inputted signal from an accelerometer attached on the rolling bearing. A basic frequency analysis according to a damaged part can be performed by optional band pass filter and envelope function (included in the CF-0473 Amplitude Modulation Component Extraction Function), which filters a frequency band in vibration caused from a damaged bearing. The amplitude in a frequency band tells the timing of bearing maintenance. Also the filter can be set while listening to the sounds from bearing through headphones.


Function used : CF-0473 Amplitude Modulation Component Extraction Function

Abnormal vibration diagnosis of bearings

Inspection of transmission noise by tracking analysis
The CF-4700 can perform quality control of transmission by tracking analysis of vibration signal from a transmission. In this example, the CF-4700 performs tracking analysis with rotational pulses from a rotation controller in a transmission tester. Rotational tracking analysis of meshing order is performed using measured vibration by the NP-3000 Series Accelerometer with Built-in Preamplifier in terms of varying rotational speed from idling to the maximum. Pass/fail judgment of the transmission is made by setting a judgment line along the tracking data.

Function used : CF-0471 Tracking Function + CF-0472 Shape Comparator Function

Inspection of transmission noise by tracking analysis

Inspection of a metal part by hammering sound
The frequency spectrum of a hammering sound is affected by cracks or fractures of a metal part (e.g. a casting part). In this example, the metal part is suspended in free vibration for hammer exciting, and an inspection is made from the hammering sound. The hammering sound is measured by the LA-4440 Integrating Sound Level Meter. Then via AC output, inputted to the CF-4700 which performs a frequency analysis to find the difference in power spectrum shape between OK and NG products. The CF-4700 makes judgments using the Shape Comparator Function with the difference.

Function used : CF-0472 Shape Comparator Function

Inspection of a metal part by hammering sound

Inspection of abnormal sound generated from a power supply board
Sometimes power frequency sound and high frequency sound are generated from electronic parts on a power supply board. In this example, abnormal sound coming from a power board is measured by the MI-1235 1/2-inch Measurement Microphone and the MI-3111 Microphone Preamplifier in an anechoic box to avoid influence of background noise. Then the signal is inputted to the CF-4700 for frequency analysis. The CF-4700 makes pass/fail judgment with areal content rate in power spectrum by setting up of a judgment block around the power frequency caused the abnormal sound.

Function used : Block Comparator Function

Inspection of abnormal sound generated from a power supply board

Inspection of a wire harness device for automobile
A wire harness device inside a sliding door of automobile sometimes makes abnormal sound while the door is in motion. The wire winding sound can be used for inspection. Drive a motor of wire harness device in a sound insulating box and the LA-1410 Integrating Sound Level Meter measures the sound from the device. Then the CF-4700 performs frequency analysis of the AC output signal from the Sound Level Meter to make pass/fail judgment of the partial overall level in a specific frequency band.

Function used : Block Comparator Function

Inspection of a wire harness device for automobile

Imbalance inspection of a turbofan
When a turbo fan has imbalance, the signal from a vibration sensor attached on it increases. Therefore, it is effective for imbalance inspection to measure vibrations of the rotating turbofan. By using signals from the NP-3000 Series Accelerometer with Built-in Preamplifier, you can define the target frequency band and the judgment level, then set judgment blocks to the CF-4700 FFT comparator. In this case, the "peak max" is selected as the judgment method. If the maximum value of the waveform exists in the specified block area, it means OK. If not exists, it means NG.

Function used : Block Comparator Function

Imbalance inspection of a turbofan

Digital I/O

Digital I/O Recommended Connection Circuit / Specifications
DIGITAL INPUT

The following functions are assigned to the connector.

• Control by command assignment (max. 9 terminals)

• Panel condition selection (4 terminals)

• Judgment block changeover (4 terminals)

Input type : Driven by contact or open collector (shared common, 9 inputs and common are isolated together)
Input current : Max. 5 mA
Logic : Negative logic (Low=1, High=0)
Power voltage : Isolation 5 V
Applicable connector: FK-MC 0,5/10-ST-2,5
(by Phoenix Contact. GmbH & Co. KG) (provided as a standard accessory)

STATUS OUTPUT

Outputs 4 kinds of statuses.
• Comp-BUSY

• OK

• NG

• ERROR

Output type : Open collector (4 outputs are separated, each signal is isolated.) Output withstand voltage : 30 V
Output current : Max. 25 mA (sink)
Collector saturation voltage : 1.0 V or less
Logic : Negative logic (Low=1, High=0)
Applicable connector : FK-MC 0,5/8-ST-2,5
(by Phoenix Contact. GmbH & Co. KG) (provided as a standard accessory)
COMP OUTPUT

Any 5 judgment setups can be selected from 20 and the results can be outputted.
Output type : Open collector (shared common, 5 outputs and common are isolated together)
Output withstand voltage : 30 V
Output current : Max. 25 mA (sink)
Collector saturation voltage : 1.0 V or less
Logic : Negative logic (Low = 1, High = 0)
Applicable connector : FK-MC 0,5/6-ST-2,5
(by Phoenix Contact. GmbH & Co. KG) (provided as a standard accessory)

Specifications

Input Section

General input
Number of input channels 1 channel
Input connector type BNC (Type C02)
Input type Single-ended, isolated
Input impedance 1 MΩ±0.5 %, 100 pF or less
Input coupling DC or AC (-3 dB±0.3 dB at 0.5 Hz)
Power supply current for sensor (CCLD) +24 V、E mA
TEDS function (* Note) Accepts accelerometer and microphone conforming to IEEE 1451.4 ver.0.9, ver.1.0.
TEDS ver.0.9 (0: accelerometer, 12: microphone)
TEDS ver.1.0 (25: accelerometer, 27: microphone)
Maximum input voltage 30 Vrms (42.4 Vpeak)
Absolute maximum input voltage 70 Vrms AC 1 minute (50 Hz)
Input voltage range 1 Vrms, 31.62 Vrms (2 ranges)
DC offset -60 dB full scale or less (When auto zero is on and DC coupling)
Amplitude flatness ±0.1 dB
Harmonic distortion -90 dB or less (Standard, when optional filter is off)
Full-scale accuracy ±0.1 dB (At 1 kHz)
Aliasing -90 dB or less
Amplitude linearity ±0.0015 % (At full scale)
Input level monitor Lights up in red LED at excessive input. (Lights up in red for 95% of input voltage range)
Dynamic range 110 dB or more
A/D converter 24 bits type ⊿Σ
External trigger input
Input connector type BNC (Type C02)
Input voltage range ±12 V
Input impedance 100 kΩ
Input coupling DC or AC
Input frequency range 0 to 300 kHz
External sample input
Input connector type BNC (Type C02)
Input voltage range ±12 V
Input impedance 100 kΩ
Input coupling DC or AC
Input frequency range 0 to 300 kHz (Not available direct sampling)
Analog filter
High-pass filter (HPF) Cut-off frequency (Selectable) 1, 3, 10 Hz (-18 dB/oct)
10 Hz conforms to vibration severity standards filter. (3 order Butterworth, ISO 2954)
Low-pass filter (LPF) Cut-off frequency (Selectable) 1k, 10 kHz (-18 dB/oct)
1 kHz conforms to vibration severity standards filter. (3 order Butterworth, ISO 2954)
Digital filter
Frequency weighting filter A, C
(Conforms to IEC 61672-1 Ed.1.0 class 1,
ANSI S1.4-1983 type 1,
JIS C1509-1: 2005 class 1)

* Note: If a TEDS supported sensor made by other companies is used, TEDS information may not be read depending on the type of a TEDS tip included in a sensor.

1. If you are considering the purchase of a TEDS sensor made by other companies, please consult to the manufacturer or dealer of the TEDS sensor, and perform the operation check.

2. When you want to use a TEDS sensor you already have with the TEDS supported measurement instruments made by Ono Sokki, please perform the operation check with a demonstration product of Ono Sokki. (Please consult your nearest distributor or Ono Sokki sales office nearby.)

 

 

Display

Size 8.4-inch
Resolution 800 x 1600 *
Method TFT color LCD with resistive film type touch panel
Brightness adjustment ON/OFF 2 levels
Lighting (backlight) LED
* The TFT color LCD is created by the full use of advanced technology. However, the pixels (dots) of non-lighting or always lighting occasionally exist in the display. (The ratio of the number of effective dots: 99.999 % or more.) Also, unevenness of the color or brightness may be visible depending on the viewing angle or the temperature change. This is not a product failure, so please note that return or exchange of the product cannot be accepted.

Analysis Section

Frequency range 1 Hz to 40 kHz
Number of sampling points/ analysis points 256/100, 512/200, 1024/400, 2048/800, 4096/1600, 8192/3200, 16384/6400
Real-time analysis 40 kHz (16384 points or less, at internal sampling)
Overlap processing MAX, 75 %, 66.7 %, 50 %, 25 %, 0 %, optional setup
Window function Rectangular, Hanning, flat-top
Time waveform processing function First and second order differentials, single and double integrals
Absolute value conversion, DC cancel, trend elimination, smoothing
FFT calculation 32-bit floating point (IEEE single-precision format)
Trigger function
Trigger level -99 to 99 (Unit: %) Default value: 25 %
Hysteresis level 0 to 99 (Unit: %) Default value: 2 %
Position ±8191
Trigger mode Free, repeat, single, one-shot
Slope +, -, ±
Trigger source CH1, external trigger input
Averaging function
Number of averaging setup 1 to 65535 times
Averaging setup time 0.1 to 999.9 seconds (Interval: 0.1 second)
Time domain Summation average, exponential average
Frequency domain Summation average, exponential average, peak hold, max overall
Amplitude domain Summation average
Averaging control function A/D over cancel
Processing Functions
Time domain Time waveform
Frequency domain Power spectrum, Fourier spectrum, 1/1 octave (bundled), 1/3 octave (bundled)
Amplitude domain Amplitude probability density function, amplitude probability distribution function

Comparator Function

Judgment mode Continuous mode, single mode
Judgment result output Total judgment result, individual judgment result of up to 5 specified blocks or shapes
Automatic data storage Only for NG, all measurement results
Timer function Start delay time setting, judgment execution time setting
0 to 255 seconds (Interval: 1 second)
Block mode
Target waveform Power spectrum, 1/1 octave (bundled), 1/3 octave (bundled), order spectrum
Maximum number of setup blocks 20 blocks
Judgment method Level, peak level, peak max (maximum value), inside max, partial overall, areal content rate
Judgment method can be specified for each block.
Judgment criterion AND or OR of all specified blocks
Shape mode (CF-0472 option)
Target waveform Time waveform, power spectrum, 1/1 octave (bundled), 1/3 octave (bundled),
order spectrum, tracking diagram
Maximum number of setting shape lines 20 lines
Judgment criterion Specified area, specified level

Memory Function

Recording device Selectable from internal storage of main unit, USB memory or SD/SDHC card
Data file Number of storable data : 9990 (max.)
DAT, TXT, BMP, TRC (Data can be saved simultaneously in four formats.
(Data storage in TXT, BMP, and TRC formats can be selected optionally.))
Panel condition memory Memorizes and recalls measurement conditions. (50 types max.)

Interface

USB (Type A)
Number of ports 2
USB 2.0 USB memory, keyboards, wireless LAN module*
* For the recommended products,
please contact your nearest distributor or contact us at overseas@ONO SOKKI.co.jp.
USB (Type mini B)
Number of ports 1
Data USB 2.0 for USB mass storage class function (CF-0477 option)
Data in the main unit is read by connecting to a PC. (Not writable)
SD card
Number of ports 1
Supports SD/SDHC Capacity: 4 GB, 32 GB*
* For the recommended products,
please contact your nearest distributor or contact us at overseas@ONO SOKKI.co.jp.
LAN
Number of ports 1
10BASE-T/100BASE-TX/1000BASE-T
Remote desktop, external control, file sharing (internal storage)
RS-232C
Number of ports 1
Baud rate 1,200 to 115,200 bps
Digital I/O
Digital input
Number of input signals 9 inputs and common (Insulation withstand voltage 42.4 Vpeak)
Applicable connector FK-MC 0,5/10-ST-2,5
Input function Control by command assignment (max. 9 kinds)
Judgment block changeover (selectable 4 blocks)
Panel condition selection (15 kinds)
Status output
Number of output signals 4 outputs are separated
(Each signal is isolated, insulation withstand voltage 42.4 Vpeak)
Applicable connector FK-MC 0,5/8-ST-2,5
Output function BUSY, OK, NG, ERR
Comp output
Number of output signals 5 outputs and common (Insulation withstand voltage 42.4 Vpeak)
Applicable connector FK-MC 0,5/6-ST-2,5
Output function Individual judgment output (any 5 outputs)

General Specifications

Power requirement 16 VDC, 3.3 A
AC adapter Power requirement: 100 to 240 VAC, 50/60 Hz
Power consumption: 65 VA or less / 150 VA or less
(When CF-0478 Power Source Backup Function is installed and charging battery)
Operating temperature range 0 to 40 °C (Humidity 20 to 80 %RH, with no condensation)
Storage temperature range -10 to +50 °C (Humidity 20 to 80 %RH, with no condensation)
Outer dimensions 220 (W) x 185 (H) x 220 (D) mm (Excluding handle, stand, and protruded section)
Weight Without option  Approx. 2.8 kg
With options  Approx. 3.3 kg (When CF-0473 Amplitude Modulation Component Extraction Function and CF-0478 Power Source Backup Function are installed, including battery pack)
Main unit cooling Naturally air cooling (Fanless)
Conforming standards CE marking
Vibration resistance 9.8 m/s2 (Frequency 10 to 150 Hz, in each of X, Y and Z direction)
Shock resistance 400 m/s2 (11 ms duration)
Accessories

・AC adapter x 1 (PS-P20023A + power cable (2 m))

・Instruction manual x 1

・CD-ROM x 1 (Reference guide, utility, etc.)

・SD card x 1 (Exclusive for updates, 512 MB)

・3 Connectors for terminal blocks
(FK-MC 0,5/10-ST-2,5 x 1, FK-MC 0,5/8-ST-2,5 x 1, FK-MC 0,5/6-ST-2,5 x 1)

・Ferrite core x 1 (E04SR301334, made by SEIWA ELECTRIC MFG. CO.,LTD.)

Optional Functions

CF-0473 Amplitude Modulation Component Extraction Function (Band pass filter, Envelope and Monitor Function)

Analog filter
High-pass filter (HPF) Cut-off frequency (variable) 50 Hz to 10 kHz (-24 dB/oct)
Low-pass filter (LPF) Cut-off frequency (variable) 50 Hz to 10 kHz (-24 dB/oct)
Envelope filter 1 kHz low-pass filter method
Headphone output
Number of output connectors 1
Maximum output
(at load resistance 24 Ω)
15 mW
Output impedance 10 Ω unbalance
Output connector type Stereo mini-jack Ø 3.5 mm
(Same signal is outputted from L and R)
Accessory Ferrite core x 1 (E04SR200932, made by SEIWA ELECTRIC MFG. CO.,LTD.)

CF-0478 Power Source Backup Function

Battery Lithium ion secondary battery mounted in main unit (detachable)
Battery Charging time that the Power Source Backup Function becomes available 15 minutes or more
(At battery level 0 %, surrounding temperature range +10 °C to +35 °C)
The battery can be charged only when the main unit is on.
Accessory Battery x 1

Product Lineup

Model name Product name
CF-4700 FFT Comparator
CF-0471 Tracking Function
CF-0472 Shape Comparator Function
CF-0473 Amplitude Modulation Component Extraction Function
(Band pass filter, Envelope and Monitor Function)
CF-0477 USB Mass Storage Function
(CF-0703 USB connection cable is included.)
CF-0478 Power Source Backup Function
CF-0702 Stylus pen
CF-0703 USB connection cable (1.5 m TYPE-A mini-B)
CF-0470J Reference guide (Japanese)
CF-0470E Reference guide (English)

Revised:2016/09/27



 

Copyright © ONO SOKKI CO.,LTD All Rights Reserved. | Terms of use