Spectra S.r.l.

4 application packages

NVH
Comprehensive package for advanced measurement in automotive and transportation industries.
OR24 comprises the latest analysis techniques available: fft, order tracking, 1/n octave, color spectrogram, constant-band tracking.
Comes standard with a remote control and battery pack.

Vibrations
Ideal for general frequency domain measurements in narrow-band and 1/3 octave: structural, vibration test, machinery, audio…
Just pick the right option for your application:

Modal
Rotating
Orders

Acoustics
Based on CPB (Constant Percentage Band) real-time digital filters for industrial acoustic measurements.
Conforms with international standards: base, 1/3, 1/12, 1/24 octave.

Diagnostic
Dedicated package for condition monitoring and vibration troubleshooting.
Offers fft and specific features such as cepstrum, envelope and kurtosis analysis.

Specifications

The OR24 is presented in 4 configurations based on the same hardware, corresponding to 4 typical fields of application:

Vibrations
Acoustics
Diagnostic
NVH

Although the 4 configurations have some common features, they have been individually tailored to better suit each application with dedicated packaged analysis functions. The hardware analyzer base of the various models remains the same whereas software and accessories can be customized. Upgrading from one configuration to another becomes very easy. Only a software upgrade is needed.

Because the software is application oriented, you only find the features related to your field of interest. When using the instrument you will notice that some commands and settings have already been appropriately adjusted to your needs.

Just select the model corresponding to your applications.

Vibrations model: includes all common functions for frequency domain analysis: spectra and cross-spectra, FRF, coherence, waterfall, mathematical functions, filters...

You may add one or more options:

Modal: used together with a modal analysis package for structural analysis
Rotating: for RPM related measurements and order analysis for general machinery
Orders: order analysis and tracking, in real-time or post-analysis, for machines with fast RPM variations. This technique is based on angle domain analysis, obtained with synchronous digital resampling of the input signals.

Acoustics model: In acoustics, 1/3 octave, and more generally 1/n octave analysis is widely preferred because of a better match with the human ear for the perception of the frequency.

This analysis is based on real-time 1/n octave digital filter banks, complying with the international standards.

We offer: 1, 1/3, 1/12 and 1/24 octave, conforming to IEC 804 end IEC1260.

It directly allows measurements of Leq and waterfall

This model is ideally suited for industrial acoustics.

Futur developments : reverberation time, Ln levels, intensity spectrum.

Diagnostic model: Extension of the Vibrations model, it features some critical functions for the vibration diagnostic and troubleshooting on rotating machines.

Here you need a panel of analysis tools capable of highlighting any failure in compressors, turbines, pumps, alternators, gearboxes, or any type of machines.

The failure can come from the various components of the machinery: roll bearings, journal bearings, gears, transmissions, electric — hydraulic — mechanical coupling.

The adapted tools available in OR24 are: tachometric measurements, envelope, cepstrum, skew, kurtosis, absolute phase, Bode plot, orbit, multi-frequency band spectra

NVH model: Gathering all the modes of analysis available: time domain, frequency domain, orders domain, 1/n octave domain.

It comes with the DC—battery pack which also allows connection to an external DC power supply (10VDC to 30VDC), The battery protects OR24 against any power failure during up to 1.30 hours.

The driver to fully control OR24 while driving can use the remote control during vehicle tests. Just a press on a key for starting a measurement or a record, save data, or any.

The NVH model is particularly flexible and very efficient for those who look for a universal tool: NVH departments in the car and transportation industry, consultants, researchers, and teachers.

Common specifications for all models:
Count of input channels	4 analog inputs and 1 digital input for trigger or tach signal
Count of output channels	2 analog outputs for signal or play back, depending on options
Frequency band	20 kHz
Analog input range	10mV to 30Vrms, autorange, ICP‰ supply, AC/DC/Float
Overload Protection	100V
Dynamic range	90 dB, 16 bits
Antialiasing filters	200dB/octave
Input conditioning	single-double integration or differentiation,
Input filters	A, C, Fixed filters (LP 300 Hz, 1 kHz)
External trigger-RPM	0 to 20V, threshold 0 to 10 V
Generator	1 output , 1Vrms, 600 W
Power supply	autosensing 100-240VAC
Vibrations	IEC 68-2-6 operating: 5-100 Hz, 5mm, 2g / 5-500 Hz, 5mm, 2g
Shocks	operating IEC 68-2-7 / 15g (11ms, 1/2 sine),100g (3ms, 1/2 sine)
Shocks storage	IEC 68-2-7 20g (11ms, 1/2 sine),
Temperature	operating 0°C [32°F] to 45°C [113°F], storage -25°C [-13°F] to 70°C [158°F]
Control panel	mains power, fan speed, temperature indication
CE marked	complies with EMC Directive and Low Voltage Directive
Weight	2 kg
Dimensions	25 x 17 x 4.5 cm,

The OR24 is delivered with :
- software for Windows 95/98/2000/NT on CD Rom - getting started and tutorial, in English, on CD - reference manual, in English - 12 months warranty

Vibrations Model
Real-time band	4 ch. x 20kHz,
Analysis mode	real-time FFT or post-analysis on WAV files (ref recorder)
Frequency range	0.5 Hz to 20 kHz, 1 - 1.6 - 2 - 2.5 - 4 - 5 - 8 progression
Frequency resolution	100 to 3200 lines
Real-time Zoom	1 to 128
Markers	harmonics, peaks, side band, band power
Trigger	free run , level, internal (generator), delta T, Manual
Valid-reject block	normal, manual, auto
Display trace	input signal, trigger, spectrum, cross spectrum, FRF H1 & H2 (magnitude-phase-real-imaginary), coherence, orbit, DC level
Display type	2D, single or multitrace, overlay 1 to 8 live or saved signals, waterfall, waterfall section in time, frequency or order, X-Y
Math functions	+, -, *, / between any traces or coefficient
Average	instant, linear, exp, peak hold, in time or frequency domain
Overlap	0, 25, 50, 75, 90%, max, retrigger
Weighting	Rectangular,Hanning, Flattop, Exponential, Force, Response
Generator 1	sine, multisine, swept sine, random, chirp, burst
Save formats	Bin, Text, Matlab
Print out	1 trace/page, n traces/page, customized (requests Word¬)

Acoustics Model
Analysis modes	real-time & post analysis digital filters based 1/n octave
Real-time band (filters)	1/1 octave : 4 ch x 20 kHz, 1/3 octave : 2 ch x 20kHz
Conforming standards	IEC 804, IEC 225, IEC 1260, IEC 651, IEC 2631
Weighting	A, C
Averaging filters	lin, exp, Leq, fast, slow, impulse, BT constant, adjustable
Display	time domain, spectrum, waterfall,
Generator	sine, multisine, white noise, swept sine, user
Save formats	Bin, Text, Matlab™
Print out	1 trace/page, n traces/page, customized (requests Word™™™™™™)

Recorder Option
Continuous rate	4 ch. x 20 kHz (gap free),
Recording modes	continuous, on event
Trigger
Length	limited by the size of the disk, 2 bytes/ sample, 100kB per channel per second
Format	WAV, multichannel, 51.2 kHz sampling frequency
Play back	1 or 2 signals can be listened on 2 analog outputs

Modal Option:
This option of the Vibrations model features:
Impact autorange
Uff format with auto-node increment
Referenced peak hold

RPM Option
Option of the Acoustics model
RPM input
Trigger	Mixed RPM, delta RPM

Rotating Option
Option of the Vibrations model
RPM input
Constant Band Tracking	computes and displays shaft speed and harmonics against RPM
Color Spectrogram	3D display in color, frequency or order X RPM or time or frequency X magnitude in color scale
Trigger	Mixed RPM, delta RPM

Orders Option
Option of the Vibrations model
RPM input	1 or 2 tach, integer or fractional number of tach/rev
RPM input	any of analog inputs or digital input
Max order	400
Order resolution	1 to 1/32
RPM range	1 to 192 000 RPM
Real-time band	4 ch x10 kHz, 2 ch x 20 kHz
Tracking rate	4 ch, 20 spectra per second
Trigger modes	free run, mixed RPM, delta RPM (run-up or coast-down), delta time, level, delta RPM Tach, mixed RPM Tach
2D display	order spectrum, order tracking, mixed order tracking (saved & live from any channel, any order)
3D display	waterfall or 3D display in color: frequency or order X RPM or time or frequency X magnitude in color scale
Save formats	Bin, Text, Matlab™
Print out	1 trace/page, n traces/page, customized (requires MS Word™)

Diagnostic Model
This model is especially designed for engineers and consultants analyzing vibrations on rotating machinery for troubleshooting, verification, acceptance tests. It is based on the Vibration model, plus some options and specific features.
Includes - Vibrations model - Recorder option - Rotating option

Display add on-features	Envelope, cepstrum, skew, kurtosis, programmable filters, integrator filters
Audio monitoring on-features	direct signal, filtered signal, envelope signal

NVH Model
The NVH model is the top of the OR24 range. It is constituted of the Vibrations model plus a set of standard options especially selected for R&D applications in car and transportation industry:
Includes - Vibrations model - Recorder option - Rotating option - Orders option - Modal option - Acoustics option - Remote control option - Single and two plane balancing

DC supply and battery 0ption
Input voltage	10 to 30 VDC
Output voltage	100 VAC
Operational lasting time	1.30 hours
Charging time	40 min
Cigarette lighter cable

Remote control Option
Type	infrared
Transmitter	connected to the PC serial port
Receiver	6 keys hand held keyboard,
Distance	3 meters
Functions	user defined: settings or commands of the analyzer

Software Toolkit Option
External control of the analyzer
Uses DDE link
Programming in VB™, VC++™, Matlab™, LabWIndows CVI™, HP VEE™, or any language supporting DDE

NT driver Option This driver is needed for installing the OR24 in the Windows NT™ environment, when the PC does not have any PCMCIA driver yet.
Windows 95/98 and Windows NT are trademarks of Microsoft Corporation ICP is a trademark of PCB Piezotronics, Inc Matlab is a trademark of Mathworks Co.

OR24: 4 channel mobile analyzer

for noise & vibration