Commtest Instruments vb Series User manual

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vbSeries
Instrument
Reference Guide
Revision 13/10/06
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ii
COPYRIGHT © 1999-2006 Commtest Instruments Ltd.
All rights reserved. No part of this book may be reproduced, stored in
a retrieval system, or transmitted, in any form or by any means,
electronic, mechanical, photocopying, recording, or otherwise,
without the prior written permission of Commtest Instruments Ltd.
For information, contact:
Commtest Instruments Ltd
28-b Moorhouse Avenue
Christchurch
New Zealand
E-mail [e-mail]
Printed in New Zealand.
Disclaimer
Information in this document is subject to change without notice.
Names and data used in examples are fictitious unless otherwise
noted. This document is distributed as is, without warranty of any
kind, either expressed or implied, respecting the contents of this
document, including but not limited to implied warranties for the
document’s quality, performance, merchantability, or fitness for any
particular purpose. Neither Commtest Instruments Ltd nor its
employees, dealers, or distributors shall be liable to the user of this
document or any other person or entity with respect to any liability,
loss, or damage caused or alleged to be caused directly or indirectly
by this document.
Trademark Notice
vb™, vb1000v™, vb1000™, vb2000™, vb3000™ and PROFLASH™
are trademarks of Commtest Instruments Ltd.
vbSeries®and Ascent®are registered trademarks of Commtest
Instruments Ltd. Other trademarks and registered trademarks belong
to their respective owners.
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iii
Contents
Section 1: Introduction.................................................1
Standard Features..................................................................2
Standard Kit Items ..................................................................3
Balancing Kit Items.................................................................3
Summary of Parts...................................................................4
Instrument Icons .....................................................................5
Precautions.............................................................................6
Operating Overview................................................................8
Onsite Analysis (Measure Mode)................................................8
Recording ....................................................................................9
Balancing...................................................................................10
Section 2: Basic Operation........................................11
Powering Up .........................................................................12
Main Menu............................................................................12
Menu Navigation...................................................................13
Returning to a Previous Screen............................................14
Selecting an Option...............................................................14
Displaying Pop-up Menus.....................................................15
Entering Text and Numbers..................................................16
Entering Numerical Values ...................................................17
Other Name Editing Commands...........................................18
Supported Sensor Types......................................................19
Mounting Sensors.................................................................21
Accelerometer Setup ............................................................21
Permanent Mounting.................................................................22
Tachometer Setup ................................................................23
Using a Strobe......................................................................25
Tach Signal from a Keyphasor®...........................................26
Tips for Taking Measurements .............................................27
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iv
Section 3: Onsite Analysis - Measurement Menu ....28
Walk-through: Taking Measurements in Measure Mode......29
Using Quick Setup Menus ....................................................31
1. Spectrum Quick Setup...........................................................32
2. Waveform Quick Setup..........................................................33
3. Demodulation Quick Setup....................................................34
Default Parameters....................................................................36
Using Automated Menus.......................................................37
4. Tachometer Display...............................................................38
5. Time Synchronous Averaging...............................................39
6. Bump Test.............................................................................41
7. Coast-down/Run-up Recordings...........................................42
8. Cross Channel Phase............................................................44
Fault Types and their Phase Relationships.........................47
9. Long Time Waveform............................................................49
Default Parameters....................................................................53
Storing Measurements..........................................................54
Analyzing Measurements......................................................55
Custom Setups .....................................................................57
Setting the Display Options...................................................59
Section 4: Manual Setup Measurement Parameters62
Setting Measurement Parameters........................................63
Setting Spectrum Parameters...............................................65
Setting the Measurement Mode................................................66
Setting the Number of Spectral Lines........................................67
Setting the Fmax .......................................................................68
Setting the Fmin ........................................................................71
Averaging...................................................................................72
Setting the Number of Averages.........................................72
Setting the Average Type....................................................73
Setting the Overlap Percentage..........................................74
Setting the Machine Running Speed.........................................74
Setting the Trigger Type............................................................75
Selecting the Channel(s) for Taking Measurements.................76
Specifying Sensor Settings........................................................76
Setting Waveform Parameters..............................................78
Setting the Measurement Mode................................................78
Setting the Number of Samples ................................................79
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Setting the Duration...................................................................80
Setting Other Parameters..........................................................80
Section 5: Recording Data.........................................81
Walk-through: Taking Recordings.........................................82
Reviewing Recordings..........................................................84
Erasing Recordings...............................................................85
Transferring Recordings from the Instrument.......................85
Tagging Items.......................................................................86
Autorepeat ............................................................................88
Section 6: Using Routes.............................................89
What is a Route? ..................................................................90
Walk-through: Taking Recordings Using a Route.................91
Reviewing Data During a Route............................................92
Skipping Route Entries .........................................................94
Jumping to a Specific Machine.............................................94
Off-route Recordings.............................................................95
Naming/Renaming a Route...................................................96
Erasing an Entire Route........................................................97
Keypad Schedule Entries......................................................98
Section 7: Advanced Operation...............................100
Demodulation......................................................................101
Setting Demodulation Parameters ..........................................102
Analyzing Demodulation Data.............................................103
Dual Channel Simultaneous Measurements.......................104
Setting Baselines................................................................105
Section 8: Creating Machines..................................106
vb Data Structure................................................................107
Creating a Machine Data Structure.....................................108
Working with Folders...............................................................109
Creating a Machine .................................................................111
Creating a Point.......................................................................112
Creating a Direction/Axis.........................................................113
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vi
Creating a Parameter Set........................................................114
Copying a Machine..................................................................116
Erasing a Machine...................................................................117
Erasing a Point, Direction/Axis or Parameter Set ...................118
Renaming a Machine, Point or Direction/Axis.........................119
Maintaining Data Integrity..................................................119
Attaching Notes to an Item..................................................120
Selecting a Note from a List ....................................................121
Removing a Note from an Item ...............................................122
Erasing a Note Permanently....................................................122
Section 9: Balancing Rotors....................................123
Introduction.........................................................................124
The Balancing Process.......................................................125
The Tachometer..................................................................126
The Balancing Menu...........................................................126
1. Set Balancing Parameters..............................................127
Number of Planes....................................................................128
Balancing Units........................................................................128
Weight Orientation...................................................................128
Remove Trial Weight(s)?.........................................................129
Weight Position........................................................................129
Advanced Balance Options.....................................................131
2. Trial Readings (Single/Dual Plane).................................132
Initial Reading..........................................................................132
Trial Weight Reading (Left Trial Reading)...............................133
Right Trial Reading..................................................................133
Suggest Trial Weight Mass......................................................133
Suggest Trial Weight Angle.....................................................134
Initial ........................................................................................136
Left...........................................................................................136
Right ........................................................................................136
3. Balance...........................................................................136
Perform Trim Balance..............................................................137
Enter Trim Readings................................................................137
4. Review Readings............................................................138
5. Balance Weight Calculations..........................................138
Suggest Trial Weight...............................................................139
Split Weights............................................................................139
Combine Weights....................................................................140
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vii
Change Radius........................................................................140
ISO 1940 Limits.......................................................................140
6. Load/Save Balancing Data .............................................141
7. Print Report.....................................................................143
Section 10: Balancing Walk-through.......................145
Step 1. Set Balancing Parameters......................................146
Step 2. Initial Reading.........................................................146
Step 3. Trial Weight Reading..............................................149
Step 4. Balancing................................................................153
Step 5. Trim Balance ..........................................................154
Tips for Balancing...............................................................155
Section 11: Utilities...................................................156
Printing from the Instrument................................................157
Printing Balancing Reports from the Instrument .....................157
DPU-414-30B Printer Setup....................................................157
DPU-414-30B 'Virtual' DIP Switch Settings.............................159
Adjusting the LCD Screen...................................................160
Adjusting the Contrast.............................................................160
Restoring the Default Contrast................................................160
Turning the Backlight On/Off...................................................160
Setting the Date and Time..................................................160
Battery Management...........................................................161
Checking the Battery Charge and Voltage..............................162
Charger Control.......................................................................163
Recharging the Instrument......................................................163
Reconditioning the Battery Pack .............................................164
Fresh Battery Inserted.............................................................165
Power Saver............................................................................165
Replacing the Battery Pack.....................................................166
Memory Management.........................................................166
Instrument Memory..................................................................166
Checking the Memory Used....................................................168
Erasing all Recordings.............................................................168
Erasing all Machines ...............................................................170
Upgrading Firmware Using Proflash...................................171
Other Options......................................................................172
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viii
Halt After Recording................................................................172
Backlight Off Delay..................................................................175
vb Structure Lock.....................................................................176
Left-handed Start Key for Auto Routes ...................................176
Section 12: Troubleshooting ...................................177
Contacting Technical Support.............................................177
Resetting the Instrument.....................................................177
Power Problems..................................................................177
Data Transfer Problems......................................................178
Data Problems....................................................................178
Other Problems...................................................................179
Appendix 1: List of Abbreviations...........................180
Appendix 2: Specifications......................................181
Index ..........................................................................189
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Section 1: Introduction
1
Section 1: Introduction
This Instrument Reference Guide is the companion manual to the
Ascent Software Reference Guide. This book has been formatted to
allow you to quickly and easily learn how to use your vb instrument.
Please keep this book for future reference and read it before
operating your vb instrument.
If you any have questions not answered by this manual or would like
to make a suggestion, please contact us at our website,
www.commtest.com.
Note: Although this document makes use of common vibration
analysis concepts, it is not intended as a comprehensive guide or
training manual. Please ensure you have the relevant knowledge
and experience to carry out the procedures described. It is essential
to follow all appropriate safety precautions when working near
rotating machinery.
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Section 1: Introduction
2
Standard Features
•DSP for fast, accurate calculations
•24-bit A/D converter providing high-precision measurements
•Displacement, velocity, and acceleration measurements
•Frequency and time domain measurements
•8.5 MB non-volatile memory capable of storing up to 8192
recordings (32 MB for vb3000)
•Time and date stamped recordings
•PROFLASH upgradable vb firmware
•Temperature compensated graphical LCD (Liquid Crystal
Display) with 240 x 128 pixels and electroluminescent LCD
backlight
•1500 mAh Ni-Cad (Nickel-Cadmium) battery pack
•Battery charger and conditioner
•RS232 interface to communicate with your PC
•Ascent Windows-based Vibration Analysis Software with
exception reporting, data trending, alarm bands, orders
display, fault frequency analysis, harmonic and sideband
cursors, true peak approximation, notes, photographic image
attachments and multiple chart modes
•Tachometer input for speed and phase measurements
•Balancing analysis: single in vb1000 and single or dual plane
in vb2000 and vb3000 only
•Route and off-route recording modes
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Section 1: Introduction
3
Standard Kit Items
•Protective boot with strap
•Power transformer (13.5 ± 1.5) V DC, 1 A output
•DC car adapter 12 V DC output
•USB Ascent security dongle (parallel dongle available on
request)
•USB to serial adapter
•Data-transfer cable
•Accelerometer ICP® type
(1 x for vb1000/vb1000v, 2 x for vb2000/vb3000)
•Accelerometer coiled cable
(1 x for vb1000/vb1000v, 2 x for vb2000/vb3000)
•Accelerometer magnetic mounting base
(1 x for vb1000/vb1000v, 2 x for vb2000/vb3000)
•Ascent Vibration Analysis Software on CD-ROM
•Instrument Reference Guide
•Software Reference Guide
•Quick Start Guide
•Warranty card
•QA card
•Carry bag
Included with vb1000v
•Reflective tape
•Non-contact tachometer sensor
•Adjustable tachometer stand with magnetic mount
•Tachometer extension cable (2 meters)
Balancing Kit Items
Included with vb1000, vb2000 and vb3000
•Reflective tape
•Non-contact tachometer sensor
•Adjustable tachometer stand with magnetic mount
•Tachometer extension cable (2 meters)
•Accelerometer straight cable (5 meters) x 2
•Carry bag
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Section 1: Introduction
4
Summary of Parts
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Section 1: Introduction
5
Instrument Icons
The instrument is in spectra recording mode.
The instrument is in spectra review mode.
The instrument is in route mode.
The instrument is waiting for the hardware to stabilize before
taking a measurement.
There is a note attached to this item.
This item is tagged.
Only some items have been tagged on this machine, point
or direction/axis.
Indicates this item is part of a route.
Only some items have been selected for a route on this
machine, point, or direction/axis.
One or more recordings have been taken within this
machine, point, or direction/axis.
This machine structure has been defined (name, point,
direction/axis and parameter set), but no recordings have
been taken.
The instrument is communicating with a PC through the
Ascent software.
This machine has balancing data saved with it.
A delta symbol used to show the frequency or time
difference between two peaks of a spectrum.
Indicates that the circumference arc of the rotor is being
used as a weight position reference for balancing.
Indicates that a fixed number of attachment points are being
used as a weight position reference for balancing.
Indicates that degrees are being used as a weight position
reference for balancing.
The halt after recording 'relaxed' baseline warning is active.
The halt after recording 'tight' baseline warning is active.
This parameter set is used with a keypad schedule entry.
The battery is running low and needs charging.
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Section 1: Introduction
6
Precautions
Please read and understand this section before operating your
instrument. Heed all warnings and recommendations to prevent data
loss, data inaccuracy, damage to the instrument, or injury to yourself.
Do not attach sensors to any object with a high
potential voltage i.e. a voltage that exceeds 50 V DC or
32 V AC or the ‘safety extra low voltage’ (SELV)
defined by your local power authority.
Ensure the cables and bootstrap cannot become
entangled with any rotating or moving machinery.
Do not bring any objects sensitive to magnetic fields
(e.g. cardiac pacemakers, credit cards, floppy disks,
video tapes, audio cassette tapes, mechanical
watches) near the magnetic mounting bases.
Do not operate the instrument in an explosive
environment.
Charge the battery pack up to at least 30% capacity
before taking a recording. If using the instrument for 4
hours or more, first ensure that the battery pack is fully
charged.
Constantly charging the battery when it is not fully
drained will create a 'Memory' effect and eventually
shorten the amount of charge that the battery can hold.
Do not detach the battery pack from the instrument for
more than 2 hours as data and settings may be lost
from the instrument.
Ensure that the battery pack is securely fastened (but
not over-tightened) to the instrument before operating.
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Section 1: Introduction
7
Transfer data stored in the instrument to a PC before
reprogramming the instrument. PROFLASHING the
instrument instrument with new firmware may erase all
data stored in the instrument.
When using an ICP®type accelerometer, ensure that
the drive current is turned on otherwise the
measurements will be incorrect.
Mount the sensor properly before taking measurements
or recordings. Otherwise, the data will be incorrect
and/or inconsistent.
To clean the instrument use a mild detergent diluted in
warm water. Do not use abrasive or polishing
substances, hydrocarbons, petrochemicals or solvents
as they degrade the plastic.
Do not place the vb instrument or the magnetic
mounting base in a hot place where the temperature
exceeds 140 °F (60 °C). Otherwise, the battery pack or
magnet will degrade.
Although the instrument has a rugged construction, do
not expose it to wet conditions or store it in a damp
place where the relative humidity exceeds 95%.
If the instrument malfunctions, return it to an authorized
dealer. Do not attempt to repair the instrument yourself,
as this will invalidate the warranty.
Use only an approved instrument power transformer
13.5 V ± 1.5 V DC, 1 A output, center positive) and
ensure its voltage and frequency rating matches that of
your mains AC power.
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Section 1: Introduction
8
Operating Overview
The instrument can be used to perform the following tasks:
•Taking live measurements for onsite analysis of vibration
spectra and waveforms
•Recording of vibration data for transferral to a PC
•Single and dual plane balancing
Onsite Analysis (Measure Mode)
Vibration spectra and waveforms are measured and analyzed onsite.
This is suitable for one-off investigations and involves these steps:
•Measurement parameters are set on the instrument.
•The spectrum or waveform is measured and analyzed
onsite.
•The data is recorded to memory (optional).
•The data is transferred to a PC for further analysis (optional).
See Onsite Analysis (page 28) for more information.
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Section 1: Introduction
9
Recording
Vibration recordings are taken for all monitored machines and then
transferred to a PC for analysis.
The instrument guides the person taking the recordings through a
pre-defined data recording sequence. This is to simplify the task and
minimize mistakes. The data recording sequence is contained in a
recording ‘route’. A recording route is created on a PC then
transferred to the instrument (see the Ascent Software Reference
Guide, for instructions). The use of recording routes is particularly
useful if a large number of machines are routinely monitored. The
following steps are involved:
•A recording route is created on a PC then transferred to the
instrument...
•Data for each item on the recording route is sequentially
collected, guided by the instrument.
•The collected data is then transferred to a PC for analysis.
See Recording Data (page 81) and Using Routes (page 89) for more
information.
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Section 1: Introduction
10
Balancing
Rotating mass imbalance problems are analyzed and corrected
onsite. A rigid rotor can be balanced in one or two planes. The
following steps are involved:
•An initial measurement of the imbalance is taken.
•A trial weight is attached to the balancing plane and another
measurement is taken. For dual plane balancing, the same is
done for the second plane also.
•Correction weights are attached to the balancing planes as
recommended by the instrument.
•A measurement is taken in each plane to confirm that the
rotor is balanced. Any residual imbalance can be removed
via trim balancing.
See Balancing Rotors (page 123) and Balancing Walk-through (page
145) for more information.
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Section 2: Basic Operation
11
Section 2: Basic Operation
This section describes how to perform basic operations on your
instrument.
You will learn to:
•Power up the instrument
•Navigate through initial screens
•Select an option
•Display and use pop-up menus
•Enter and edit text and numbers
•Record and review numeric data
•Set up sensors
Caution: Read Precautions (page 6) before operating your
instrument.
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