Vibration Analysis Program SX-A1VA

Vibration Analysis Program
SX-A1VAThis program adds vibration measurement functions to theRIONOTE Multifunction Measurement System.
All essential vibration measurement functions are provided, enabling equipment diagnosis
and trend management for industrial machinery.
The program also supports detailed diagnosis including FFT analysis and envelope
processing, and ISO absolute value evaluation can also be performed. Because up to
four accelerometers can be connected to theRIONOTE, simultaneous measurement in twohorizontal directions and one vertical direction
or other measurements of multiple planes canbe easily realized.

Monitoring of vibration
sound (acceleration)
possible

Vibration meter mode
Measurement simultaneously for vibration
acceleration, velocity, and displacement
Auto store function continuously records vibration
values and tacho data in 100 ms intervals
Calculation of average vibration quantity values fora specified measurement period (to facilitate
reading of representative values for measurement
data with considerable fluctuation)
Separate filter settings (HPF, LPF) for acceleration,
velocity, and displacement are supported
Connection examplesAccelerometer Cable
VP-51 Series

Accelerometer

PV-91C/90T/97I(Triaxial type)＊1

With amplifier

Accelerometer Cable
VP-51 Series

Accelerometer

PV-08A/85/90H etc.

BNC Adapter＊1 When using a 3-axis accelerometer,
three VP-52C units are required,
one for each axis.

VP-52C

Charge Converter

VP-40

SX-A1VA

Curled accelerometer cable

Accelerometer

PV-57Ⅰ(length about 50 to 100 cm)

VP-51KⅠ

Accelerometer(Triaxial type)PV-97C※2/93※2＊2 When using a 3-axis accelerometer,
three VP-40 units are required, one for each axis.

Charge Converter

VP-40Simple diagnosis
By periodically measuring the vibration magnitudeand comparing the results to a reference value,
the equipment condition (normal or potential problem)
can be diagnosed.
The example at right shows the screen in absolute measurement modefor four channels. Because the danger state is indicated by purple-red,caution by yellow, and good by green, the display of measurement resultslets the operator assess the state of vibration at a glance.

Absolute value evaluation mode (absolute value
evaluation function)
ISO 10816 series (Evaluation of machine vibration by measurements on
non-rotating parts).
According to ISO 10816-1:1995 / Amd. 1:2009, evaluation criteria formechanical vibration over a specified range are to be decided byagreement between the supplier and the user of the machine, andboundary values for evaluation are to be determined in consideration of
the measurement position and the support rigidity of the machine etc.
Reference value.A: Newly installed machinery will normally be within this range.
.B: Long-term continuous operation allowed.
.C: Long-term continuous operation not allowed,
but limited-term operation allowed.

.D: High risk of injury. Operation not allowed.

Representative zone boundary value
Vibration velocity
rms value
mm/s
0.28
0.45
0.71
1.12
1.8
2.8
4.5
7.1

Range of representative zone boundary value

Zone boundary
value A/B
0.71 to 4.5

Zone boundary
value B/C
1.8 to 9.3

9.3
11.2
14.7
1828

Standard mode (evaluation function)

45

Two threshold values (upper and lower) each are set for acceleration, velocity, and displacement to perform evaluation.

Zone boundary
value C/D
4.5 to 14.7

Detailed diagnosis (FFT analysis and envelope processing)
The FFT analysis function and envelope processing function (acceleration envelope processing)can be used to determine abnormal conditions and to assess failure stage and location.
Three examples for analysis using patterns to analyze vibration causes are shown below.

Bearing fault
The bearing fault manifests itself by large acceleration. Envelope analysis reveals peaks at regular intervals, as shownin the illustration. When the dimensions of the bearing parts, number of rolling elements, number of shaft revolutions etc.
are known, the faulty part can be determined from the primary frequency of the series of peaks.

Envelope processing① Shock waveform due to bearing fault② Absolute waveform value

Repeat cycle Repeat cycle③ Envelope processing usingenvelope filter
Repeat cycle Repeat cycle④ FFT analysis

Time waveform

For failure diagnosis of bearings, envelope processing isused because it is necessary to know the repetition
period of the shock waveform.

FFT spectrum

Misalignment
In the case of misalignment, a large frequency component that is an integer multiple of the number of revolutions appears
in the axial direction. The multiplication factor of the vibration component depends on the type of bearing.

What is misalignment?
Misalignment refers to a state
where the rotation center line of
two rotary axes that are joined bya coupling is not in a straight line.
This can be due to core deviation,
face shift or a combination ofthese or similar conditions.
When misalignment occurs, facerunout can cause an increase in
the thrust load acting on thebearing, which shortens theservice life of the bearing.

Core deviation

Face runout

Core deviation
andface runout

FFT spectrum

Unbalance
Unbalance is a condition that occurs in the rotary direction. It is characterized by an increase only in the vibration
component that is equal to the number of revolutions. Other vibration frequency components will show almost no change.
The vibration amplitude is proportional to the degree of unbalance. When the rotation frequency increases, the amplitude
increases by the square of the number of revolutions.

What is unbalance?
Unbalance occurs when the center of gravity of a rotating body is displaced
from the center. Different types of unbalance include static unbalance, coupling
unbalance, and dynamic unbalance. When unbalance occurs, the load acting
on the bearing in the circumferential direction increases, which shortens theservice life of the bearing.
Static unbalance

FFT spectrum

Coupling unbalance

Dynamic unbalanceTrend management (relative value evaluation)
SX-A1VA program can store the data tagged with information of
the measurement point and can output the data all together foreach measuring object. By using spreadsheet software suchas Excel enables trend management of the machinery condition.
In order to assess changes in the vibration of rotating machineryor similar which can indicate problems and possible causes, it isnecessary to effectively accumulate and manage measurement
data. Reference values can then be determined based on thesedata for example to set caution and danger threshold values.
Measurement value

Time series

Measurement point

When a caution threshold is exceeded, monitoring should bestrengthened, and when the danger threshold is reached,detailed diagnosis will normally be performed. With many
common types of vibration acceleration, values that are about 2
to 3 times above normal are considered caution indicators and afurther increase by a factor of 2 to 3 will indicate a danger state.
For a given piece of machinery, vibration measurement location,measurement direction, and measurement period aredetermined, and a graph in which measured values are entered ina time series is created (trend management graph).

Trend management graph
Evaluation

Specifications
Number of input channels

FFT analysis mode

Max. 2 (with SA-A1B2)

Frequency range

100 Hz, 200 Hz, 500 Hz, 1 kHz, 2 kHz, 5 kHz, 10 kHz, 20 kHz(Number of logical channels: Using one signal input, settings for

Number of analysis lines

200, 400, 800, 1 600, 3 200

Time window functions

Rectangular, Hanning, Flat-top

Average processing functions

Linear average, Exponential average, Maximum value hold (MAX)(Number of sampling points: 512, 1024, 2 048, 4 096, 8 192)

analysis of multiple vibration quantities such as acceleration,
velocity, displacement, acceleration envelope etc. can be made.)Vibration frequency range

Acceleration: 0.02 to 141.4 m/s2 (rms)(using PV-57I)

Velocity: 0.2 to 141.4 mm/s (rms, at 159.15 Hz)

Display functions
Display units

Displacement: 0.02 to 40.0 mm (EQ peak-peak, at 15.915 Hz)
Measurement frequency range

Power spectrum Time waveform of 1 frame

Max. 4 (with SA-A1B4)

Waveform recording

Acceleration: 1 Hz to 20 kHz

Sampling frequency(Electrical characteristics) Velocity: 3 Hz to 3 kHz

Acceleration: m/s2, G, in/s2, Velocity: mm/s, in/s, Displacement: mm, μm, milRecording of vibration waveform during measurement
Vibration meter mode: 51.2 kHz (fixed)
FFT analysis mode: Frequency range x 2.56

Displacement: 3 Hz to 500 Hz
Quantization bit rate

Acceleration envelope: 1 kHz to 20 kHz

24 bit (fixed)

Trigger measurement

Filters
High-pass filter

1 Hz, 3 Hz, 5 Hz, 10 Hz, 1 kHz

Trigger modes

Free, Single, Repeat

Low-pass filter

500 Hz, 1 kHz, 5 kHz, 10 kHz, 20 kHz

Trigger source

Vibration meter mode: Vibration quantity, Time, External, Tacho pulse

Vibration meter mode

FFT analysis mode: Waveform, Time, External, Tacho pulse

Acceleration: rms, EQ 0-peak, Waveform peak, Crest factor
Velocity: rms, EQ 0-peakDisplacement: rms, EQ 0-peak, EQ peak-peak

Sampling frequency

51.2 kHzStore functions

Instantaneous value store, Auto store, Average value store

Threshold evaluation

Allows setting a threshold value for a vibration quantity, with on-screen indication

functionwhen the vibration quantity exceeds the threshold during measurement

ISO absolute value

Evaluation of instantaneous value or average value can beevaluation function

performed based on ISO 10816-1:1995/Amd.1:2009

OptionWaveform Analysis Software

AS-70

Waveform processing software for display andanalysis of waveform data collected with SX-A1VA

RION Co., Ltd. is recognized by the JCSS which uses ISO/IEC 17025 (JIS Q 17025) as an accreditation standard and bases its
accreditation scheme on ISO/IEC 17011. JCSS is operated by the accreditation body (IA Japan) which is a signatory to the Asia
Pacific Laboratory Accreditation Cooperation (APLAC) as well as the International Laboratory Accreditation Cooperation (ILAC).
The Quality Assurance Section of RION Co., Ltd. is an international MRA compliant JCSS operator with the accreditation number
JCSS 0197.
＊ Windows is a trademark of Microsoft Corporation.

ISO 14001 RION CO., LTD.
ISO 9 0 0 1 RION CO., LTD.

＊ Specifications subject to change without notice.

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3-20-41, Higashimotomachi, Kokubunji, Tokyo 185-8533, Japan
Tel: +81-42-359-7888 Fax: +81-42-359-7442
This product is environment-friendly. It does not include toxic chemicals on our policy.
This leaflet is printed with environmentally friendly UV ink.
1711-21904.P.D