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PRÜFTECHNIK VIBXPERT II User Manual

PRÜFTECHNIK VIBXPERT II
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VIBXPERT
®
II
Dual channel
FFT data collector
and signal analyzer
Operating
Instructions
Dear customer,
We are grateful for your trust and hope that
you are happy with our product. If you have
any suggestions for improving this product
or this instruction manual, please let us know.
PRÜFTECHNIK Condition Monitoring
Fax: +49 89 99616-300
eMail: info@pruftechnik.com
Edition: May 2012
Order no.: LIT 53.201.EN
Translation of the original manual (german)
Series: VIB 5.310
Firmware version: 3.2x

Table of Contents

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PRÜFTECHNIK VIBXPERT II Specifications

General IconGeneral
Weight1.5 kg
Channels2
Sampling Rateup to 51.2 kHz
Display TypeLCD
Protection ClassIP 65
Weight (approx.)1.5 kg
DisplayColor display
Data StorageInternal memory
Frequency Range (kHz)0.5 to 20 kHz
A/D Resolution24-bit
Memory4 GB
Operating Temperature-10°C to +50°C
Data TransferUSB
Storage Temperature-20°C to +60°C

Summary

Chapter 1: Introduction

Safety and Operating Notes

Provides crucial safety instructions and guidance for operating the device correctly and safely.

Chapter 2: Getting Started

Interfaces

Details connections for sensors and data cables on the device front, with color-coded identification.

Power Supply

Explains the device is powered by a Lithium-Ion battery, with the battery icon indicating residual charge.

Memory Card

Details the standard 2 GB CompactFlash card and its replacement with higher capacity cards.

Basic Settings - Device Setup

Guides checking and changing fundamental device settings before measurements, accessed from the start screen.

Route

Explains settings for 'Route' and 'Template' modes, including route display type and graphic route options.

Measurement Settings

Configures autostart measurement, autostart MUX, route optimizer, and multi-task time optimization.

Save Settings

Configures 'AutoSave' for automatic result saving and sets conditions for stopping AutoSave.

Transducers

Accesses the transducer menu for sensor pre-setting and configuration, allowing preselection of available transducers.

Transducer Parameters

Allows checking and editing of measurement quantity, signal type, input range, accuracy, sensitivity, and offset.

Setting Up New Transducers

Guides adding new transducers by entering name and setting parameters, then saving.

Registration

Explains enabling modules by entering a password, often found on a registration certificate.

VIBXPERT PC License

Device must be registered in OMNITREND using PC license password for data exchange.

Service Menu

Provides access to service, maintenance, and training functions like Device Info and Offset Compensation.

Memory Card (CF)

Allows formatting, checking, and repairing the memory card. Formatting deletes all data.

Data Transfer

Describes data transfer between VIBXPERT and PC via direct or network connections.

Setting Up the Network Communication

Guides connecting VIBXPERT to a network, setting IP address, subnet mask, and gateway.

Update

Explains downloading and installing current device software from the PRÜFTECHNIK homepage using the update tool.

Chapter 3: Measurement

What Is a Measurement Task?

Defines a dataset for measurement: quantity, sensor, evaluation, and RPM requirements.

Multimode: Measurement, Analysis, Diagnosis

Activates Multimode mode. Tasks grouped into Overall Values, Signals, and Advanced tabs.

Save Result

Saves measurement results after completion via MENU -> 'Save'. Enter file name.

Measurement of a Route

Processes measurement tasks for regular schedules, compiled using OMNITREND.

Start Route

Guides selecting a route, measurement location, task, connecting sensor, and starting measurement.

MENU Functions in the Tree / List View

Details MENU functions like Skip/Unskip, Event/Comment, Delete result, Set unmeasured, Reset RPM, Break multitask.

MENU Functions in the Measurement Task Selection Screen

Details MENU functions in the task selection screen: Skip/Unskip, Event/Comment, Multitask breakdown, Diagnostic Task, Task Manager, Display result, Delete result.

Measuring with a Machine Template

Uses 'Machine template' for measurements on identical machines with consistent locations and tasks.

Start Measurement

Guides selecting a template, entering machine details, and starting measurement. Info field shows template load and last measurement dates.

Options Before, During and After a Measurement

Covers options for aborting, repeating, saving results, and changing measurement channel or sensor.

Saving a Result

Confirms saving results after measurement. Can append or overwrite existing data.

Changing the Measurement Task (M)

Highlight measurement type, press F key, and select required measurement task from the list.

Setting Up a New Measurement Task (M)

Guides creation of new tasks via 'Task Manager': enter name, change channel, select setups for measurement, sensor, evaluation, RPM.

Creating a New Setup (M)

Explains creating new setups for measurement, evaluation, or RPM for user-defined tasks via 'Task Manager'.

A1: Meas. Setup Parameters in the 'Overall Values' & 'Advanced' Tab

Covers measurement quantity, sample frequency, measurement time, frequency range, averaging type, overlap, and time-synchronous averaging.

Trigger Type / Level / Start

Sets trigger type, level (as % of max range), and start time for measurements, controlling signal recording start/end.

A2. Measurement Tasks in the 'Signals' Tab

Details measurement tasks in 'Signals' tab: Filter Type, HP/LP Filter, Demodulation factor, and frequency ranges.

B. Setup Parameters for Sensors

Describes sensor parameter setup. 'Sensor Setup' menu is deactivated if a default sensor is defined.

C. Evaluation Parameters for Overall Value / Time Waveform Meas.

Sets thresholds for overall value measurements or creates user-defined setups. Includes description entry.

Trend

Monitors machine conditions by recording overall values over time to trace condition and predict future development.

Trend in a Route

Accesses historical data in 'Route' mode for comparison with current measurements and trend display.

Trend in the ‘Multimode’

Starts a trend by opening a file in 'File manager', clicking the trend file, and appending the current result.

Comparing the Current Measurement with Historical Data/ Reference Data

Compares current measurement with historical or reference data using OMNITREND data and 'Standard' display mode.

Prewarning if Measurement Values Deviate Excessively

Warns if current value deviates significantly from historical. Green LED and R! symbol appear if deviation exceeds set limit.

Near Location (Route)

Performs tasks at near locations simultaneously for faster route collection. Requires 2-channel module.

Triaxial Sensor (Route)

Supports triax sensors for X/Y/Z vibration recording. Requires special cable adapter for 2-channel devices.

Recording

Performs measurements based on time or speed, useful for recording values under specific conditions.

Time Waveform Recorder

Records time waveforms over long periods. Checks settings for time and scan rate in task manager.

Data Acquisition at the VIBRONET Multiplexer

Uses 'Multiplexer measurement' for automatic data acquisition at many locations, processed within a route or template.

Diagnostic Measurement at VIBRONET Multiplexer

Conducts diagnostic measurements using multiplexer locations for vibration, FFT, Orbit, and RPM-dependent tasks.

Chapter 4: Results

Evaluating Results

Ensures measurement validity and no errors before evaluation. Displays task, channel, range, sensor, date/time.

Characteristic Overall Value - Single Values

Displays up to two overall values with RPM. Shows exceeded thresholds and corresponding LEDs.

Characteristic Overall Values - Trending

Displays results as a trend curve if >2 measurements saved. Markers indicate individual measurements with details.

Time Waveform

Displays results as XY diagram. Lower half lists highest amplitudes. Shows delta if thresholds exceeded.

Signal Post Processing

Calculates characteristic overall values from signal (max/min amplitude, mean, p-p, RMS, Crest factor) via MENU.

Calculating the Spectrum

Calculates spectrum from time waveform. Sets parameters: input signal, averaging mode, and window type.

Time-Synchronous Average (Postprocessing)

Determines time waveform synchronously with rotation to emphasize RPM events and suppress stochastic results.

Spectrum, Cepstrum

Displays spectrum in upper pane, time waveform in lower. Info options: Max 10, Alarms, Frequency marker, Trending values.

Info / Trending Values (in the TrendingSpectrum Only)

TrendingSpectrum shows waveform, spectrum, and up to 30 overall values based on OMNITREND frequency bands.

Comparing Trending Values with Reference Values:

Compares trending values with reference values, showing a table with values and limits.

Comparing Trending Values with Historical Values:

Compares trending values with historical data, displaying a diagram with trends.

Post Processing

Alters measurement quantity in spectrum (e.g., velocity to displacement). 'Alarms' function available only with original quantity.

Reference (Only in the Route / Machine Template Mode)

Compares current spectrum with reference or historical spectrum, displayed in a 'waterfall' diagram.

3D Display of Spectra: Waterfall Diagram

Displays multiple spectra (up to 75) in a 3D waterfall diagram for analysis. Allows navigation and view changes.

Sound Spectrum: Third-Octave and Octave Level Diagram

Displays sound spectrum by breaking acoustic signals into frequency bands. Quantifies sound pressure level per band and overall.

Configuring the Result Display (Display Setup)

Guides configuration of result display after measurement, accessing 'Display Setup' via MENU.

B1. Display Setup for Measurement: Spectrum / Time Waveform

Sets zoom, cursor type, graph type (continuous/poles), axis labels, amplitude scaling, and default display mode.

C1. Display Setup for Measurement: Coastdown, Orbit, Phase

Configures display for Coastdown (overall value, plot type), Orbit (polar/Cartesian), and Phase (continuous phase, speed marker).

C2. Display Setup for Trend: Phase

Sets phase trend display based on time or RPM. Options to show result details, change diagram type, or show specific channels.

D. Display Setup for Measurement: 2-Channel Measurement (1+1)

Configures spectrum display for 2-channel tasks, choosing spectrum only or including additional info. Sets display for channel A/B.

E. Display Setup for Measurement: Impact Test

Chooses whether impact test results are displayed as time waveform or spectrum. Result selection dialog opens automatically.

Printing Out Reports

Enables printouts of screenshots, reports, and route/template reports to USB printer or as PDF.

Measurement Reports

Creates detailed documentation including results, general info, and measurement details. Available for Spectrum, Time waveform, etc.

Configuring the Measurement Report

Defines report content by setting Company, Logo, Customer, Inspector/Asset, Result file name, Report event, and Setup info.

Printing Out the Report for Route/Machine Template

Prints reports for routes/templates, including overall values, trend parameters, visual inspection, and phase measurements.

Exporting Measurement Data in MS Excel Format

Exports data (overall value, FFT spectrum, balancing, waveform, etc.) to MS Excel format via VIBXPERT Utility Program.

Chapter 5: Measurement Tasks

Characteristic Overall Vibration Values

Assesses machine/bearing/gear conditions using RMS velocity and ISO 10816-3 standards. Includes peak values and crest factor.

Shock Pulse Measurement

Measures bearing condition using 'Carpet value' (lubrication) and 'Maximum value' (damage).

RPM Measurements

Uses Laser-Trigger Sensor for RPM measurement and trigger encoder. Detects signals optically from rotating shaft.

Temperature Measurement

Uses thermocouple Type K sensors (handheld probe or magnetic sensor) for temperature measurements.

Runup / Coastdown

Records vibration changes during startup/shutdown to determine resonance frequencies. Available as Phase-RPM, Spectra-RPM, Overall Value-RPM.

C.1 'Overall Value - RPM' Measurement Type

Records overall vibration values relative to RPM. Resonance points indicated by RPMs with increased vibration amplitudes.

C.2 'Spectrum - RPM' Measurement Type

Records spectra while machine RPM changes, tracking RPM-dependent vibration components to identify resonance points.

C.3 'Phase - RPM' Measurement Type

Records phase amplitude and angle versus RPM. Resonance points indicated by increased amplitude and 180° phase jump.

C.4 Two-Channel Measurement

Differences in displaying results of two-channel measurements. Spectrum-RPM shows one spectrum per channel.

C.5 Measuring Rate (Number of Measurement Points)

Number of saved values affects result quality. 'Overlap' increases rate; 'RPM deviation' can reduce rate to save space.

Shaft Centerline Plot

Records shaft axis movement in journal bearing during runup/cooldown to identify fault conditions like oil whip.

Phase Measurement

Identifies faults causing spectral lines at same position (e.g., unbalance) using synchronous phase measurement.

Orbit

Records shaft axis movement at constant speed using two non-contact sensors at 90° angular distance.

Envelope Analysis

Detects periodic impacts in vibration signal, mainly for bearing/gearing damage diagnosis.

Cepstrum Analysis

Spectrum of a spectrum, suitable for detecting regular structures in frequency spectrum, e.g., bearing/gearing damage.

User-Defined Measurement Quantities

Allows free definition of measurement quantities like voltage or current, recorded as overall value, time waveform, or spectrum.

Multi-Measurement Task ('Multitask')

Combines similar measurement tasks to shorten time, performing one signal measurement and calculating individual task results.

Multi-Measurement Task in the 'Multimode' Operating Mode

Tasks created in Task Manager. Set start measurement consecutively or simultaneously, define trigger channel.

Dual Measurement (1+1)

Carries out vibration measurements (value, spectrum, time signal) on both channels simultaneously.

Impact Test - 1 Channel

Determines structure resonance frequency and RPM ranges amplified by resonance.

Modal Analysis - Two-Channel Impact Test

Visualizes dynamic behavior of a structure and detects operating-critical natural vibration forms.

TrendingSpectrum

Measurement template for route mode, collecting data faster. Generates spectrum and up to 30 overall values from time signal.

Order Spectrum

Records and displays frequencies as multiples of shaft rotational frequency (= order). RPM is recorded simultaneously.

Order-Based Spectrum

Converts frequencies to orders. RPM measured or entered. Advantageous for machines running at different RPMs.

DC Measurements

Records DC component in signal for time waveform, spectrum, phase, coastdown, and orbit measurements.

Chapter 6: Appendix

VIBXPERT Utility

Tool for firmware updates, saving/restoring results/settings, formatting card, exporting results, and file conversion.

Setting Up a Connection with VIBXPERT

Establishes data transmission via network or USB. Includes connection testing and IP address entry for Ethernet.

VIBCODE

A vibration measurement system using coded points for identification of measurement locations on machines.

Measuring with VIBCODE

Never use sensor directly on machine surface; it must be locked onto the measuring pin. Ensure secure connection for reproducibility.

Technical Notes

Provides information on treating VIBXPERT as a precision instrument, including storage, cleaning, and maintenance.

Technical Data

Provides detailed specifications for input channels, measurement parameters, computer, display, memory, interfaces, and power supply.

Troubleshooting

Addresses VIBXPERT not starting up due to flash memory failure, recommending firmware reloading.

Reloading Firmware

Guides reloading firmware using VIBXPERT update tool, serial/Ethernet cables, and PC setup.

VIBXPERT Firmware Modules

Details available firmware modules (Basic, 1-channel, 2-channels, Modal analysis, Recording, Balancing) and their features.

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