and more...

AC: -3dB at 0.5Hz or less
DC: －

• Automatically set to AC when CCLD is used.

• -40dBVr to 30dBVr in all 8 steps

90dB or higher: +30 to -30dBVr range
70dB or higher: -40dBVr range

• 800 lines, Hanning window, 50 averages, 20 °C , high-pass filter OFF

20kHz or less: ±0.1dB (0dBVr or less)
20kHz to 100kHz: ±0.2dB (0dBVr or less)

• Gain accuracy measured in the same voltage range

• Simultaneous use of filters not possible

●BNC (C02 type) input: EXT SAMP Connector

●R03-R6F input: REV SENSOR Connector

• BNC (C02 type) input or rotary encoder input is selected. Simultaneous input not possible

Sound input and playback with a built-in microphone and speaker
Voice memo can be stored by linking the measurement data.
External connection has priority.

External MIC input: φ 2.5 stereo mini jack input (L)
External SPEAKER output: φ 3.5 stereo mini jack output (L)

●Operating switches: 5 （START/STOP/F1/F2/F3）
●Following functions are settable at F1, F2, F3

Highly Legible Large Screen with touch panel function and Intuitive Button Operations

• Thanks to the 10.4- inch TFT liquid crystal display, detailed data can be displayed even though QUAD display mode is selected. Simple and easy operation is also possible by touch panel.

• With the supplied stylus pen, comments, marks and memos can be entered directly, making it easier to recognize the working efficiency and data. Memos can be saved simultaneously and be shown or hidden.

• Selection of main data of the FFT analyzer, selection of the input voltage range and frequency range, and saving and loading of data can be performed directly from the hardware keys on the front panel. The CF-7200 offers simple, quick operations and much more. Even when observing a signal with unknown magnitude and frequency, an appropriate range and display conditions can be set with intuitive continuous button operations. And the signal output function can be turned on or off with the hardware keys, so signal output (option) can be started or stopped with a simple ON/OFF, preventing careless operations.

Input and Output Connectors Conveniently Arranged on Top

• Each channel is equipped with a CCLD (power supply for sensors) which can directly drive an acceleration pickup, a microphone, and other sensors requiring a power supply.

• TEDS reads data retained in a TEDS sensor and then automatically supplies the power to the sensor and performs unit calibration.

• Can be operated under the condition of noise/vibration-free up to about 5 minutes by means of cooling fan off. Since the CF-7200 itself would not be the source of noise/vibration, analyzing or collecting for subtle noise/vibration is easy without worrying about self-noise/vibration.

• Automatically detects cable disconnection of an acceleration pickup and a microphone*, preventing trouble before measurement.

* Intended for sensors with a built-in constantcurrent type preamplifier.

• Equipped with dedicated connectors which directly drive a rotation detectors (Applicable to the MP-981/LG-916) and can be used as an external sampling clock. This makes it easy to perform order ratio analysis (under development) which analyzes vibration and noise of engines, motors, and other rotating machinery with rotation-based values.

• When the remote controller (DS-0295 option) is connected to the CF-7200, three main operations can be performed in addition to analysis start/stop. Operating the CF- 7200 from near the working or supervising position makes measurement much easier.

• A signal coming from an acoustic or vibration sensor connected to each channel can directly be monitored as sound using a headphone or an external speaker. It makes possible to check aurally whether an intended vibration or sound is input correctly as well as by waveform observation, allowing you to check sensor setup and operation intuitively and with your senses.

Smooth Operations on a Desk

*Maximum record time at single time

• The data recording function for recording a signal waveform in the CF- 7200 at a touch of the REC button makes it possible to record long-time phenomena, which are difficult to be caught timely. Data can be recorded in a high-speed 2GB CF card (compact flash memory card*), enabling long-time recording of a large volume of data.

• The DAT format (binary), TXT format and BMP format can also be saved simultaneously. Data can also be processed using Office software and pasted into reports. Since the underlying data in DAT format are securely saved, data can be displayed and processed using PCbased FFT software (DS-2000 Series, XN-8000 Series) and the CF unit.

DS-2000 series Multi-Channel Data Station
XN-8100 series Report Creation software
OC-1000 Graph Creation Tool
Spreadsheet Software

Wide data input/ouput

• The USB mass-storage function makes it possible to transfer data of the CF-7200 to a PC through a USB cable* without having to remove a storage medium and without needing special software (Windows ® XP).

• A raw signal coming from an acoustic or vibration sensor connected to each channel can directly be monitored as sound using a headphone or an external speaker. This makes it possible to check aurally whether an intended vibration or sound is input correctly as well as by waveform observation, allowing you to check sensor setup and operation intuitively and with your senses.

• Equipped with a built-in microphone for voice recording and a speaker, voice memos can be attached to data and played back when the data is displayed, supporting data arrangements.

There are also connectors for connecting an external speaker and microphone, allowing you to create voice memos even in a noisy place.

■ Time-axis Waveform

Performs A/D conversion of the raw waveform of an electrical signal of vibration, noise, pressure, strain, etc. coming from a sensor and then displays the result as time-domain data. The Xand Y-axis values at any point can directly be read using the search cursor. The delta cursor function makes it easier to read the time difference and level difference.

■ Power Spectrum

The power spectrum indicates the magnitude of frequency components contained in a sampled time-axis waveform. Frequency analysis enables detection of abnormal conditions of a facility, which are difficult to estimate through measurement of vibration and noise level and observation of raw timeaxis waveform. The natural frequency of a structure can also be measured.

■ Frequency Response Function

The frequency response function indicates the ratio of output to input and the frequency characteristics of phase difference. The resonant frequency and phase of a structure can easily be obtained accurately by entering the signal of vibration force generated to Ch1 by an impulse hammer or shaker and then inputting the response (signal of acceleration, velocity and displacement) to Ch2.

■ Coherence Function

The coherence function is for evaluating the linearity and correlation of input and output of a transmission system, obtained in the frequency domain. The rate of contribution of the input signal to the output signal is represented as a digit from 0 to 1 for each frequency, for evaluating the reliability of the frequency response function, locating a key factor from multiple noise and vibration sources, and evaluating the correlation.

■ Inverse Fast Fourier Transform (IFFT)

After frequency analysis, a time-axis waveform of a selected band can be obtained again by performing Inverse Fast Fourier Transform (IFFT) for the selected frequency band. For example, by selecting a waveform portion excluding an unnecessary frequency band confirmed in the FFT result and then performing Inverse Fast Fourier Transform (IFFT) for it, a time-axis waveform can be obtained with the selected high frequency band eliminated.

■ Hilbert Transform

A logarithmic damping factor can be obtained by obtaining a time envelope of a time-axis signal by means of Hilbert transform.

■ Cepstrum

Cepstrum is obtained by performing Fourier transform of the power spectrum again, allowing detection of the periodicity contained in the spectrum. In addition, reflected waveforms can be eliminated and fundamental frequency extracted by estimating a spectrum envelope from the Cepstrum. Cepstrum can be applied to make an analysis of the sound waves, seismic waves, biowaves, etc.

■ Tracking analysis (option:CF-0722)

Tracking analysis is effective for analyzing the noise and vibration in synchronization with rotational speed. This function enables to analyze which rotational speeds increase noise and vibration, which rotating parts cause this noise and vibration, and how many times of the frequency component of noise and vibration to the rotational speed occur.

■ Constant ratio tracking
■ Constant width tracking
■ Time tracking

■ Rotational tracking analysis (option:CF-0722)

Equipments with built-in rotating machines, such as engines and motors in products like automobiles and office equipments, may have serious problem when the resonance between rotational equipment of rotating machine and each components will occur. This rotational tracking analysis helps greatly in cases like this.

■ EU Function

The CF-7200 FFT analyzer can not only directly read values as a voltage (V) but also as a physical quantity. When the input sensitivity has been set and calibration with a reference signal performed for each sensor, waveform values are converted to physical quantities when displayed, eliminating the need to convert from voltage values to physical quantities.

■ Average Summation UNDO Function

This function is used during average summation to UNDO one average summation. For example, if you end up with a bad result of summation in impulse hammer shaking, you can cancel the result data (by UNDOing the summation) and then try the summation again.

■ Differential and Integral Functions

First and second order differential operations and single and double integral operations are possible for time-axis and frequency-axis waveforms. Acceleration data from an acceleration sensor can be converted to velocity and displacement; and velocity data from a laser Doppler vibration meter can be converted to acceleration and displacement and displayed. When the EU function is used together, unit conversion (among "m/s2", "m/s" and "m") is also performed automatically.

■ List Display

This function displays a list of X-axis and Y-axis values for selected points on a displayed waveform. Numeric list for 40 points selected, peak value list and harmonic list enable numeric values to be simultaneously checked for multiple points.

■ Multi-screen

Display data can be arranged flexibly in the SINGLE, DUAL, TRIPLE and QUAD screen display modes.
In the DUAL, TRIPLE and QUAD screen display modes, the difference between screens can be viewed by means of overlay display.

■ Zooming Analysis

In frequency analysis, zooming analysis is possible by selecting a central frequency. This function is useful for more detailed frequency analysis, for example, analysis of beating and other waveforms involving indistinguishable adjacent frequency components.

■ Frequency Weighting Filters

Frequency weighting filters such as A, C and Flat weighting are provided. can be applied with A weighting and C weighting. This makes it easier to perform auditory sense correction in microphone-based acoustic analysis.

■ Sine Sweep Output Function

By entering the signal from shaker, high-accurate frequency response function can be obtained with sweep average using in combination with signal output function of CF-7200.

*CF-0771 Signal Output module (option) for 1ch is required