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Vibration measurement system - NVH Analyzer Pro - 16 IEPE channels

NVH analyzer with 16 measuring channels

The cost-effective Apollo light sound and vibration analyzer package with the NVH Analyzer Pro offers 16 measurement channels as well as additional trigger/tacho channels.

The measurement electronics are housed in a robust, high-quality aluminum housing.

A particularly low power consumption enables operation with a tablet PC.

The Apollo_light is our most cost-effective FFT and octave analyzer in our range.

Several Apollo_light devices can be synchronized with each other and allow an individually adjustable sample rate per channel.

The Apollo Light is especially designed for:

  • Occupational safety and environmental protection
  • Engineering services
  • Quality assurance
  • Research and development
  • Sound level measurement
  • Sound power measurement
  • Frequency analysis
  • Signal recorder
  • Human vibration measurement
  • Machine vibration measurement
  • Modal analysis
  • Order analysis
  • Structural analysis

NVH Analyzer Pro Video Presentation

Sound test with imulse hammer

Rotor Dynamics

Rotor Vibration analysis

Ordertracking analysis 

Vibration Measurement

Scope of delivery:

  • 16 channel Apollo lt 16  
  • Mini D Ribbon Connector 36
  • 115 dB dynamic range
  • 2ch trigger
  • 2 output channels (3.5mm jack)
  • NVH Analyzer Pro + Mini-PC & Driver for Windows
  • Splitter box MDR/18x BNC
Feature
Apollo_lt_16
Input channels 2/4/8
16
Female input connectors
MDR/18xBNC
Resolution
24-Bit
Real-time bandwidth
DC … 20 kHz
Dynamic range
110 dB
Noise
< 3 µV(A)
Sample rates
200 Hz to 51,2 kHz
Decimation
up to 200Hz
sample rate selectable
per channel
Max. input voltage
± 1 V // ± 10 V peak
Gain
0 dB, 20 dB
Over-voltage detection
yes
Phase shift
< 0.1° @
20 Hz … 20 kHz
Offset correction
yes, automatically
at auto-calibration
Input coupling
DC, AC 0,15 Hz
HP 10 Hz, LP 2 kHz
Microphone voltage supply
IEPE current supply
2 mA
TEDS (IEEE 1451.4)
yes
Output channels 1-2
Resolution
Real-time bandwidth
Max. output voltage
Connector

24 Bit
DC … 20 kHz
± 3,16 Vpeak
3.5 jack
Trigger
2x In:
Trigger / tacho
trigger level adjustable
0.1Hz … 6MHz
2x Out
Dimensions
180 x 105 x 22 mm
Weight
700 g
USB-Power consumption
700 mA
Operating temperature
-10 °C … +50 °C

NVH Analyzer Pro Functions

REALTIME DATA PROCESSING
GRAPHICS AND VISUALISATION
User interface
Configurable graph screens
Time domain
Recorder (1 to 16 Ch, real-time autoscaling)
Scope (trigger, persistence, envelope), Analog/digital meter, tabular display, overload indicator
Multi domain
XY recorder (Lissajous), 2D graph, Orbit graph
FRF plot (amplitude/phase/real/imaginary vs frequency)
Application specific
FRF geometry, Modal circle, Rotor balancer, Harmonic FFT, Vector scope
Auto-generating of displays with typical application setup
DATA IMPORT
ASCII *.txt
WAV *.wav
MP3 *.mp3
Stiegele Datasystems MicroEdition, *.mdf
TEAC TAFFmat Format, *.hdr, *.dat
DATA EXPORT
ASCII *.txt
Excel *.csv
FILTERING
IIR
Low pass/high pass/band pass/ 2nd to 6th order, Butterworth
STATISTICS
Calculation base
Time based
Types
RMS, Average, Peak-Peak
Data range
Running, Triggered, Start-Stop
REFERENCE CURVES
Types
time, value, dual-value, vector, XY, frequency domain with interpolation
TIME DOMAIN
ANALYSIS
Integration/Derivation
single/double with adjustable filter, automatic unit conversion
(e.g. acceleration to velocity to displacement) FFT
FFT ANALYSER
General
multiple independent FFT analyzers at the same time
Amplitude types
amplitude FFT (Ampl, RMS, Power, PSD, RMS SD), Complex FFT (Real/Imag/Ampl/Phase)
Windowing
Hanning / Hamming
Window overlap
0, 10, 25, 50, 66, 75, 90 %
Triggered FFT
triggered time-range with pre- and post-trigger as input, auto calculation of window resolution, averaging of triggered FFT‘s, e.g. for bump – impulse hammer test application
DC cut off
0,5 Hz
FFT block size
26, 51, 101, 201, 401, 801, 1601, 3201, 6401, 12801, 25601
Acoustic weighting
A, B, C, Lin (Z)
Octave
1/3, type; Lin/A/B/C weighting, Lin/Pk avg with overlap
Visualization
amplitude axis with real-time autoscaling: Lin/log/0dB/reference dB/Sound(A)
Post processing
possible to add/change all calculations offline on the stored raw data
Spectrum markers
Free
ORDER TRACKING

Frequency source

Counter: optical tacho, proximity, pick-up probe (1 pulse/rev), optical strip tape probe
(with bl/wh tape, algorithm for determining number of pulses),
1-, 2-, 3- tracks encoder, gear tooth with missing teeth (e.g. 60-2), CDM, CDM with zero
RPM channel: any analog speed channel, virtual (synthesized RPM channel, also in post-processing) Analog pulses: analog signal (e.g. 60-2) / analog tacho + angle sensor math
Input Ch. for analysis
any analog input channel, e.g. IEPE accelerometer, microphone, etc…
Visualization
3D graph, Order and Frequency spectrum, Waterfall FFT real time extraction of single spectral lines of matrix Orbit plot, XY recorder, Bode plot, Nyquist plot of any order, any signal vs RPM
Calculation criteria
Runup / Coast down / Both directions with RPM limits and Delta RPM and/or Delta Time
Order FFT
from 8 to 256 orders, resolution from 1 to 1/64
Harmonics
extract overall RMS and amplitudes/phases/Real/Imag of selectable orders (from sub-orders e.g. 0.1x, 1x, 2x, 3x to max order) in Time domain & RPM domain
Post processing
possible to add/change all calculations offline on the stored raw data
Data export
Complex data (Real/Imag/Ampl/Phase) in any format, see Software Export section
TORSIONAL VIBRATION
General
high precision rotational and torsional vibration and slippage measurement, by use of 2 rotary encoders
Frequency source
optical strip tape probe (with bl/wh tape, algorithm for determining number of pulses), 1-, 2-, 3- tracks encoder, gear tooth with missing teeth (e.g. 60-2), CDM, CDM with zero
Angle accuracy
up to 0,00075° at 10 000 rpm
Angle resolution
up to 0,06° at 10 000 rpm
Features
Rotational DC filter (0,1 to 10 Hz), compensation of uncentered encoder mounting
Output
Rotational angle/velocity, Torsional angle/velocity
Visualization
angle based view, time domain
MODAL TEST
Impact hammer method
roving hammer/roving accelerometer moving through points, averaging of multiple hits, double hit rejection, rejecting of hits (action buttons), grouping of sensors, adjustable excitation, and response window
Free-run mode
Function generator (Apollo Series) for shaker excitation (swept sine, burst, chirp…) Hanning/Hamming windowing with overlap 0, 25, 50, 66, 75 % operating deflection shapes (Spectral ODS)
FRF
Receptance, Effective Mass, Mobility, Impedance, Dynamic Compliance, Dynamic Stiffness, Transmissibility
Modal Parameters
Mode Indicator Function (MIF), extract exact frequencies and damping factors with Modal circle fit (Option)
Post processing
FRF from stored raw data, in free-run mode
Geometry
Geometry editor, load, save, import models in UFF (UNV) format (Option)
Animation
movement of nodes for selected frequency (place marker), change speed and amplitude (Option)
Data export
Complex data (Real/Imag/Ampl/Phase) in UFF (UNV) format or any other, see Software Export section
HUMAN BODY VIBRATION
General
module for judging vibration levels for risk of damage to the human body
Supported types
Hand arm
Compliance
to ISO 8041, ISO 2631-1, ISO 2631-5, ISO 5349 standards
SOUND LEVEL
Frequency weighting
A, B, C, Lin (Z)
Time weighting
Fast, Slow, Impulse
Octave plot
1/3 Lin/A/B/C/ weighting, Lin/Pk avg with overlap
Supported standards
IEC 60651, IEC 60804, IEC 61672
Outputs
Sound pressure level, any combination of Frequency and Time weighting, Leq, Lpk, Lim, LE overall or on custom statistical rate, percentile levels (1, 5, 10, 50, 90, 95, 99 %)
More features
real-time narrow band FFT, frequency weighted raw channel
Calibration
auto-calibration of scaling factor with reference calibrator (1kHz, 94dB, 114 dB acc to IEC 60942:2003)
BALANCING
Application
for rigid rotor running below its resonance frequency, based on order tracking (amplitude & phase), single- and dual-plane
Supported tacho inputs
Counter: optical tacho, proximity, pick-up probe (1 pulse/rev), optical strip tape probe (with bl/wh tape, algorithm for determining number of pulses), 1-, 2-, 3- tracks encoder, gear tooth with missing teeth (e.g. 60-2), CDM, CDM with zero RPM channel: any analog speed channel, virtual (synthesized RPM channel, also in post-processing) Analog pulses: analog signal (e.g. 60-2) / analog tacho + angle sensor math alarm output if velocity exceeds predefined value weight splitting
Visualization
Vector polar plots of 1st order of all runs
Sequence
step-by-step guidance through procedure: initial run, trial mass run, correction mass run, repeat steps if needed
Features
x and y direction balancing at the same time, when using triaxial sensor
SOUNDPOWER
Standards
ISO 3741 (noise source in reverberation test room), ISO 3744 (engineering grade, free field over reflective plane), ISO 3745 (precision grade, anechoic or hemi anechoic room)
Geometries
Parallelepiped, Cylindric, Hemisphere, Sphere
Microphones
10 number of microphones; positions will be calculated according to entered geometry and size, floor / 1 wall / 2 wall setup
Measurement
Guided sequence, previous/next group (action buttons), background noise/sound measurement, with repeatability check, minimum measurement duration & level plausibility check and warnings, grouping of microphones
Octave
1/3 octave
Correction methods
C1 and C2 meteorological, K1 background noise and, K2 room noise (mean absorption grade, reverberation time, K2 editor)