Instrument Manual
www.GlobalTestSupply.com
Ver. 1.01
12 April 2007
iii
Contents
CONTENTS ..................................................................................................................... III
HANDLING SECURITY ................................................................................................... V
SAFETY PRECAUTIONS ................................................................................................ V
WARRANTY DISCLAIMER ............................................................................................. V
DECLARATION OF CONFORMITY ................................................................................ VI
SWITCHING THE INSTRUMENT ON AND OFF ............................................................... 1
INTRODUCTION ............................................................................................................... 1
ROUTE MEASUREMENT ................................................................................................. 2
A MEASURING POINT IN THE ROUTE THAT HAS NOT YET BEEN MEASURED ................................ 2
A POINT IN THE ROUTE IN TIME OF MEASUREMENT .................................................................. 2
TOTAL VIBRATION ................................................................................................................ 2
A MEASURED POINT IN THE ROUTE ........................................................................................ 3
VIEW ALL ASSOCIATED MEASUREMENTS STORED IN THIS POINT .............................................. 3
TEMPERATURE MEASUREMENTS IN THE ROUTE ...................................................................... 4
SPEED IN THE ROUTE ........................................................................................................... 5
VIEW ALL POINTS OR MOVE BACK- AND FORWARDS IN THE ROUTE .......................................... 5
RE-MEASURE A SINGLE POINT IN THE ROUTE ......................................................................... 6
SPECTRA IN THE ROUTE (OPTIONAL) ..................................................................................... 6
DELETE ALL THE MEASUREMENTS IN THE ROUTE ................................................................... 7
TRANSFERRING A ROUTE TO THE X-TREND SOFTWARE .......................................................... 7
THE ROUTE SETTINGS MENU ................................................................................................ 8
OFF ROUTE MEASUREMENTS ....................................................................................... 9
MAIN MENU SETTINGS..................................................................................................... 10
MEASUREMENT SETTINGS MENU ......................................................................................... 10
TOTAL LEVEL .................................................................................................................... 11
THE TOTAL VALUE SETTINGS MENU ......................................................................... 12
X-Viber manual
www.GlobalTestSupply.com
iv
BEARING CONDITION ................................................................................................... 13
RECOMMENDED BEARING CONDITION LEVELS ...................................................................... 14
BEARING CONDITION SETTINGS MENU ................................................................................. 15
ENVELOPE ........................................................................................................................ 16
ENVELOPE SETTINGS MENU ............................................................................................... 17
SPEED .............................................................................................................................. 18
SPEED SETTINGS MENU ..................................................................................................... 19
TEMPERATURE .................................................................................................................. 20
TEMPERATURE SETTINGS MENU ......................................................................................... 22
HOW TO INTERPRET VIBRATION LEVELS.................................................................. 23
ISO STANDARD 10816-3 ................................................................................................... 23
LOOSENESS...................................................................................................................... 25
RECOMMENDED VIBRATION LEVELS IN MM/S AND COMMON FINDINGS .................................... 25
RESONANCE ..................................................................................................................... 26
ANALYSIS ...................................................................................................................... 27
ANALYSIS SETTINGS MENU ................................................................................................. 29
BALANCING ................................................................................................................... 30
BALANCING WITH X-VIBER ................................................................................................. 30
SCHEMATIC OF THE VIBRATION INPUT ..................................................................... 38
BATTERY ....................................................................................................................... 38
INSTRUMENT INFO MENU ............................................................................................ 39
BACKUP BATTERY ............................................................................................................. 40
RESETTING THE INSTRUMENT .................................................................................... 40
X-VIBER DEFAULT SETTINGS AFTER RESTART ....................................................... 41
X-Viber manual
www.GlobalTestSupply.com
v
Handling security
Safety precautions
Vibration measurement and balancing involves measurement
on rotating machines.
Always keep a safe distance to rotating parts and secure
transducers and transducer cables from rotating parts.
Balancing involves mounting of trial and balancing weights
on the rotor. Always secure the start switch with a locker and
also use the emergency switch for double safety before working with the rotor.
This is especially important when the machine is remote controlled.
VMI AB can not take responsibility for any accidents on people and machines.
VMI AB and our authorized dealers will take no responsibility for damages on machines
and plants as the result of the use of X-ViberTM measurements.
Even though great efforts are made to make the information in this manual free from
errors and to make the information complete for the user, there could be things we have
missed, because of the large amount of information. As a result of this, we might change
and correct these things in later issues without further information.
Also changes in the X-ViberTM equipment may take place that affect the accuracy of the
information.
Warranty disclaimer
VMI AB warrants the products to be free from defects in material and workmanship under
normal use and service within two years from the date of purchase and which from our
examination shall disclose to our reasonable satisfaction to be defective.
Warranty claimed products shall be returned prepaid to VMI AB for service. We reserve
the right to repair or to replace defective products.
Always try to explain the nature of any service problem, at best by fax, e-mail or letter.
Check first all natural problems, like empty batteries, broken cables, etc. When returning
the product, be sure to indicate that the purpose is to make repairs and indicate the
original invoice number and date of shipment to you, if possible.
X-Viber manual
www.GlobalTestSupply.com
vi
Declaration of conformity
Declaration of Conformity
Equipment: X-Viber
VMI AB declares that the X-ViberTM is manufactured in conformity with national and
international regulations.
The system complies with and is tested according to, following requirements:
EMC Directive: 89/336/EEC
Low Voltage Directive: 73/23/EEC
including amendments by Directive 93/68/EEC.
X-Viber manual
www.GlobalTestSupply.com
Switching the instrument ON and OFF
ON
Keep the ON/OFF button pressed until the instrument starts. Do this also, if the
instrument of some other reason is switch of or the display is empty.
OFF
Keep the ON/OFF button pressed in three seconds until the instrument is switched
off.
Introduction
Thank you for buying X-Viber: We have put a lot of efforts to make this instrument easy to
use and to give you valuable measuring results. The instrument is manly intended for
predictive maintenance work without the need for frequency analysis and “expert”
interpretation.
X-Viber has two main functions:
Route downloaded from the X-Trend PC software. With this function you can
measure 999 different measuring points and transferring the data back to the XTrend software for trend analysis and comparison with preset alarm values. The
address to the each measuring point is shown on the display.
In route you can measure and store:
The total vibration level within the selected frequency range
The total Bearing condition value within the selected frequency range
The total Envelope value within the selected frequency range
The speed of the machine because vibrations are highly dependent of the
speed
Bearing temperature
Analysis is a function to make temporary measurement on the machine but the
values are not stored.
In analysis you can measure:
The total vibration level within the selected frequency range
Analysis of the 5 highest vibrations with level and frequency. With this
function it is possible to make a simple analysis of the cause of the
vibration.
The total Bearing condition value within the selected frequency range
The total Envelope value within the selected frequency range
The speed of the machine because vibrations are highly dependent of the
speed
Bearing temperature
www.GlobalTestSupply.com
2
Route measurement
This window
shows the
address to the
measuring
This window
shows that this
point has not
been
This window shows the
selected unit and
average for this point.
This window
shows the point
number in the
route list.
This window
shows the total
number of points
in the route.
A star here shows that
also associated
measurement will
follow.
This window shows the changes in
percent compared with previous
measurement of the same point.
The measurement is unstable while the
text “Autoranging” appear.
Waite until this message disappears
before pressing the OK button.
This window shows
the current value
compared with the
alarm level.
A happy face = below
A sad face = above
Current
vibration value
with the unit
and average
below
Move the black line over
Route with the Up or the
Down button and press the
OK button.
A measuring point in the route that has not yet been measured
Press the OK button to start the measurement.
A point in the route in time of measurement
Total vibration
Press the OK button to save the measurement and move to next measurement.
X-Viber manual
www.GlobalTestSupply.com
3
A measured point in the route
The
stored
vibration
value
The stored value
compared with the alarm
level.
A happy face = below
A sad face = above
A star here
indicates that there
are also associated
measurements.
Note!
Because it is impossible to re-calculate a total velocity value to acceleration or
displacement X-Viber is always measuring and storing all these three values on
the same measuring point.
These three values are also transferred to the X-Trend software so the user can
change the unit at a later stage.
In METRIC mode the values are stored with the units “g”, mm/s and m.
In IMPERIAL mode the values are stored with the units “g”, in/s and mils.
Both the Bearing condition value and the Envelope value are measured at the same time
as the Vibration value if the instrument is set to measure these values in the X-Trend route
settings.
View all associated measurements stored in this point
The star indicates that there are associated measurements together with the Total
vibration value.
To view also the other values the Bearing condition and Envelope values you have to
press the AUX (or MODE ) button.
Then use Left or RIGHT arrow button to browse between the measurements.
Press the ESC button to exit to the normal route function.
www.GlobalTestSupply.com
X-Viber manual
4
Temperature measurements in the route
The unit for
temperature °C or
°F indicates that the
measurement is
temperature.
Warning!
This instrument is radiating laser light. Do not stare into the beam and do not
direct the laser beam to someones face.
Note!
This temperature sensor is measuring the heat radiating from the object.
A shiny or white surface will radiate less and will thus give a lower value.
To compensate for this the emissisivity factor can be changed but must be set
in the Temperature Settings in X-Trend and can not be adjusted in the Route.
818
1
A temperature measurement
is a separate point on the
bearing level because it is
enough to measure once on
each bearing.
Press the OK
button and the laser will start.
Direct the laser towards the
surface you want to measure.
Keep a distance of approximately 200-500mm between the instrument and the object.
Make the distance between the object and the instrument shorter the smaller the surface
you want to measure is.
Measuring surface related to distance 8:1
Move the laser point slowly until you find the highest temperature reading.
Press the OK button and the measurement is stored.
www.GlobalTestSupply.com
X-Viber manual
5
Speed in the route
Department level
Machine level
Bearing level
Direction level
The unit for speed rpm
or Hz indicates that
the measurement is
speed.
Warning!
This instrument is radiating laser light. Do not stare into the beam and do not
direct the laser beam to someones face.
Note!
Direct the laser light in an angle towards the shaft reflex mark. This will give a
more stabile reading. Avoid directing the light in a perpendicular angle towards
the surface.
A speed measurement is a
separate point on the
bearing level because it is
enough to measure once on
each shaft.
Press the OK
button and the
laser will start.
Direct the laser beam towards the reflex mark on the shaft.
Keep a distance of approximately 200-500mm between the instrument and the shaft.
Move the laser point slowly until you find the stabile speed reading.
Press the OK button and the measurement is stored.
View all points or move back- and forwards in the route
You can move in the route in all levels.
Select the level you want to move within by moving the black line with the
Up or Down buttons.
The higher level you choose the larger is the steps in the Route.
X-Viber manual
www.GlobalTestSupply.com
6
Press Left or Right buttons to move in the route.
With the Left button you will move backwards and with the Right button you will move
forwards in the route.
In the lowest level you will pass all directions in the
route.
This message will appear when you move backwards
and you reach the first point in the route.
Press the OK button and this message
disappears.
This message will appear when you move forwards
and you reach the last point in the route.
Press the OK button and this message
disappears.
Re-measure a single point in the route
Move to the point you want to measure again.
Press the OK button and this message will
appear.
Change to Yes with Left or Right buttons
and press the OK button and the instrument starts to measure.
Spectra in the route (optional)
To be able to see more than ten frequencies, the
function must be activated. Do the following:
From the main menu select Route
Go to the line Direction
Press the Menu
Go to the line Spectra:
With the Left or the Right
YES and press OK.
Press the Escape button twice to come
back to the main menu
button
button select
X-Viber manual
www.GlobalTestSupply.com
7
Delete all the measurements in the route
Note!
When the measurements are deleted in this way, the comparison with previous
measurements will be false, because they will not be updated. The update can
only happen, when a new route is downloaded from the X-Trend software.
This message will appear if the
communication fails.
Check that the cables are connected
and that the USB driver for X-Viber is
installed.
If you are measuring the same machines repeatedly and you seldom change to another
route you can keep the route in the instrument and only delete the measurements.
Press the Info button while you are
somewhere in the route and this window will appear.
Move the line with the Up or the Down
button to Clear measurement and change
to Yes with Left or Right
button and press the OK
button
Transferring a route to the X-Trend software
Start the transfer program in X-Trend.
Move the line with the Up
Or the Down button in the
MAIN MENU to Communication
and press the OK button.
www.GlobalTestSupply.com
X-Viber manual
8
The Route settings menu
Turns the backlight ON or OFF
Change the contrast ratio.
A low number gives a higher ratio.
When enabled, the instrument will
automatically move to the next
point after the measurements are
finished.
Clear measurements are already
described on previous page.
Note!
If you have the option with spectra in route this function must be activated.
Note!
You can not see a spectrum in route in the X-Viber, but after transferring to the
SpectraPro software it is available.
Press the Info button while you are somewhere in the route and this window will
appear.
Move the line with the Up or the Down button to the function you want to change.
Press the Left or Right button to change the settings.
Move the line with the Up or the Down
button to Spectra.
Press the Left or the Right button
to change to YES.
The X-Viber will not store the spectra in route if NO is selected.
Press the ESC button to exit to the normal route function.
Press the ESC button to leave the route function and go back to the Main
menu.
www.GlobalTestSupply.com
X-Viber manual
9
This bar will appear when there are
more lines than shown in the
window.
Warning!
You can not store the measurements made in the Measurements mode.
This part is only for temporary measurements.
Take notes if you want to record some measurements.
Off Route Measurements
Move the line with the Up or the
Down button in the MAIN MENU to
Measurements and press the OK
button.
In the Measurements window you can select between the following functions:
Total value, this value is the RMS average of all vibrations within the selected
frequency range. You can select both unit and frequency range.
Bearing condition, this value is the RMS average in “g” of all high frequencies
within the selected frequency range.
Envelope, this value is the RMS average in “gE” within the frequency range 2-
1000Hz of the low pass filtered and rectified high frequencies between 500 to
7200Hz. You can select between different frequency ranges.
Speed, X-Viber is remotely measuring the shaft speed between 30 to 12000
rpm by sensing the infrared reflex from a target on the shaft. The target can be
any reflex tape.
Temperature, X-Viber is remotely measuring the object temperature within the
temperature range 0-120°C or -32 to 184°F by sensing the infrared radiation.
Analysis, This function is similar to the Total value but with an additional
analysis of the 5 dominating frequencies in the signal. This function is especially
useful to find the cause of the vibration and at balancing. You can select both
unit and frequency range.
www.GlobalTestSupply.com
X-Viber manual
10
MAIN MENU settings
Turns the backlight ON or OFF
Changes the contrast ratio:
A low number gives a higher ratio.
Changes ON time of the
instrument
´The ON time can be changed
between 1, 3, 5, 10 min and Never.
Changes the units between Metric
and Imperial
Selects the language
Change the sensitivity mV/unit so it
corresponds to the connected
transducer sensitivity.
Press the Info button and this window will appear.
Move the line with the Up or the Down buttons to the function you want to change.
Press the Left or the Right button to change the settings.
The settings in the MAIN MENU settings menu will automatically be used as soon as this
window is closed.
Press the ESC or OK button to exit to the MAIN MENU.
Measurement settings menu
Press the Info button and this window will appear.
Move the line with the Up or the Down button to the function you want to change.
Press the Left or Right button to change the settings.
X-Viber manual
www.GlobalTestSupply.com
11
Total level
Metric
Imperial
g rms
g rms
g Peak
g Peak
g P-P
g P-P
mm/s rms
in/s rms
mm/s Peak
in/s Peak
mm/s P-P
in/s P-P
m rms
mils rms
m Peak
mils Peak
m P-P
mils P-P
mm rms
thou rms
mm Peak
thou Peak
mm P-P
thou P-P
m/s rms
m/s Peak
m/s P-P
This part of the
window shows the
actual vibration level.
This part of the
window shows the
present vibration unit.
This part of the window
shows the actual
frequency range.
The measured value
is compared with the
alarm level.
A happy face = below
A sad face = above
When this text is shown
the measurement is
temporally stopped.
Move the line with the Up or
the Down button to Total
value.
Press the OK button and the
X-Viber starts to measure.
Press the Left or Right button to change the unit or average.
The list below shows available units.
The instrument will automatically select the unit and average from the Settings menu.
X-Viber manual
www.GlobalTestSupply.com
12
Press the Up or Down button to change the frequency range.
Frequency range in Hz
2 to 800
4 to 1600
8 to 3200
10 to 6400
old ISO range 10 to 1000Hz
Turns the backlight ON or OFF
Changes the contrast ratio
A low number gives a higher ratio
Changes the vibration unit and
avreage
Changes the measured frequency
range
Enables or disables the alarm
face.
Changes the Alarm level
The list below shows available frequency ranges.
Press the AUX button to hold the measurement.
Press the AUX button again or the OK button to continue measuring.
The Total value settings menu
Press the Info button and this window will appear.
Move the line with the Up or Down buttons to the function you want to change.
Press the Left or Right button to change the settings.
The settings in the Total value Settings menu will automatically be used when the Total
value window is opened the next time.
Press the ESC or OK button to exit to the Total level function.
Press the ESC button to leave the Total level function and go back to the
Measurement menu.
X-Viber manual
www.GlobalTestSupply.com
13
Frequency range in Hz
500 to 7200
1000 to 7200
2000 to 7200
3000 to 7200
This part of the
window shows the
actual bearing
condition value.
The unit g is the only
available unit for this
measurement.
This part of the window
shows the present
frequency range.
The measured
value is
compared with
the alarm level.
A happy face =
below
A sad face =
above
When this text is shown
the measurement is
temporally stopped.
Warning!
When the text “Autoranging”
appears, the measurement is
unstable. The operator must wait until
this message disappears before
using the measurement
Bearing condition
Move the line with the Up or the
Down button to the Bearing
condition.
Press the OK button and the XViber starts to measure.
Press the Up or Down button to change the frequency range.
The list below shows available frequency ranges.
Use a low frequency range at slow rotating (below 600rpm) machines and a high
frequency range at high speed (above 6000rpm) machines.
Press the AUX button to hold the measurement.
Press the AUX button again or the Ok button to continue measuring.
X-Viber manual
www.GlobalTestSupply.com
14
0,01
0,1
1
10
100
100 1000 10000
RPM
2000
3000
400
6000
4000
500
Good
Acceptable
Fair
Failing
Replace
Recommended bearing condition levels
Bearing condition value with the unit “g” RMS
Find the machine speed. Follow this line up to the judgment lines and read the value on
the left axis.
The diagram above is only a guide to interpret the bearing condition value. If vibrations of
other causes (e.g. flow surge, gear mesh) are within in the selected frequency range, this
can give a high bearing condition value without the bearing being damaged.
A high bearing condition value can also be acquired, if the bearing is poorly lubricated or is
overloaded (e.g. by misalignment, or large belt forces).
Compare this value with Envelope value and the bearing temperature. If all are high or
pointing upwards in the trend analysis you might have a bearing problem.
X-Viber manual
www.GlobalTestSupply.com
15
Turns the backlight ON or OFF
Changes the contrast ratio
A low number gives a higher ratio.
Changes the measured frequency
range
Enables or disables the alarm face
Changes the Alarm level
Bearing condition settings menu
Press the Info button and this window will appear.
Move the line with the Up or the Down button to the function you want to change.
Press the Left or Right button to change the settings.
The settings in the Bearing condition Settings menu will automatically be used, when the
Bearing condition window is opened the next time.
Press the ESC or OK button to exit to the Bearing settings menu.
Press the ESC button to leave the Bearing condition function and go back to
the Main menu.
X-Viber manual
www.GlobalTestSupply.com
16
Envelope
Envelope value gE RMS
0.001
0.01
0.1
1
10
100 1000 10000
RPM
2000
3000
400
5000
4000
500
Good
Acceptable
Fair
Failing
Replace
This part of the
window shows the
actual vibration level.
The measured
value is
compared with
the alarm level.
A happy face =
below
A sad face =
above
When this text is shown
the measurement is
temporally stopped.
The unit gE is the only
available unit for this
measurement.
Move the line with the Up or the Down
button to Envelope.
Press the OK button and the X-Viber starts to measure.
Press the AUX button to hold the measurement.
Press the AUX button again or the Ok button to continue measuring.
The frequency range for the envelope measurement is 500 - 6400Hz.
Band pass and peak detection range of Envelope measurements is 400 - 7200Hz.
Low pass filter range of the peak signal is 1500Hz.
Envelope level range 2 – 1000Hz.
www.GlobalTestSupply.com
X-Viber manual
17
Turns the backlight ON or OFF
Changes the contrast ratio
A low number gives a higher ratio.
Enables or disables the alarm face
Changes the Alarm level
Envelope settings menu
Press the Info button and this window will appear.
Move the line with the Up or Down buttons to the function you want to change.
Press the Left or Right button to change the settings.
The settings in the Envelope Settings menu will automatically be used when the Envelope
window is opened the next time.
Press the ESC or OK button to exit to the Envelope function.
Press the ESC button to leave the Envelope function and go back to the
Measurement menu.
X-Viber manual
www.GlobalTestSupply.com
18
Speed
This part of the
window shows the
actual speed.
The measured value is
compared with the alarm
level.
A happy face = between
the alarm limits
A sad face = above or
below the alarm limits
When this text is shown
the measurement is
temporally stopped.
This part of the
window shows the
present speed unit.
This message will appear, when the
speed is below 60 rpm.
This message will appear when no rpm
pulses are received from the transducer.
Warning!
This instrument is radiating laser light. Do not stare into the beam and do not
direct the laser beam to someones face.
Note!
Direct the laser light in an angle towards the shaft reflex mark. This will give a
more stabile reading. Avoid directing the light in a perpendicular angle towards
the surface.
Move the line with the Up or the Down button to
Speed.
Press the OK button and the X-Viber starts
to measure.
Press the AUX button to hold the measurement.
Press the AUX button again or the Ok button to continue measuring.
The speed range for the speed measurement is 60 to 12.000 rpm or 1 to 200Hz.
www.GlobalTestSupply.com
X-Viber manual
19
Speed settings menu
Turns the backlight ON or OFF
Changes the contrast ratio
A low number gives a higher
Enables or disables the alarm face
Changes the low Alarm level
Changes the unit between rpm
and Hz
Changes the high Alarm level
Press the Info button and this window will appear.
Move the line with the Up or the Down button to the function you want to change.
Press the Left or the Right button to change the settings.
The settings in the Speed Settings menu will automatically be used when the Speed
window is opened the next time.
Press the ESC or OK button to exit to the Speed function.
Press the ESC button to leave the Speed function and go back to the
Measurement menu.
X-Viber manual
www.GlobalTestSupply.com
20
Temperature
This part of the
window shows the
actual temperature.
The measured
value is compared
with the alarm level.
A happy face =
between the alarm
limits
A sad face = above
or below the alarm
limits
This number shows the
current value of the
emissivity factor.
This part of the
window shows the
present temperature
unit.
Warning!
This instrument is radiating laser light. Do not stare into the beam and do not
direct the laser beam to someones face.
Note!
Direct the laser light in an angle towards the shaft reflex mark. This will give a
more stabile reading. Avoid directing the light in a perpendicular angle towards
the surface.
818
1
Move the line with the Up or the Down button to
Temperature.
Press the OK button and the X-Viber starts
to measure.
Direct the laser towards the surface you want to measure. Keep a distance of
approximately 200-500mm between the instrument and the object.
Make the distance between the object and the instrument shorter the smaller the surface
you want to measure is.
Measuring surface related to distance 8:1
Press the AUX button to hold the measurement.
Press the AUX button again or the Ok button to continue measuring.
The speed range for the speed measurement is 60 to 12.000 rpm or 1 to 200Hz.
X-Viber manual
www.GlobalTestSupply.com
21
The Up or Down buttons will change the value of the emissivity factor. This change
Material
Emissivity. factor
Heat sink, black anodised
0.98
Paper
0.97
Black paint, matt
0.97
Ice, smooth
0.97
Wood
0.94
Glass
0.94
Rubber, hard
0.94
Transformer paint
0.94
Concreate
0.93
Brick, mortar, plaster
0.93
Porcelain
0.92
Steel, oxidised
0.79
Copper, oxidised
0.76
Steel, heat treated surface
0.52
Copper
0.04
Aluminium, bright
0.04
Warning!
Incorrect setting of the emissivity factor can lead to considerable errors.
in the value is only temporally and the value in the temperature settings menu will be used
the next time.
The Left or Right buttons will change the temperature unit between °C and °F.
Set the emissivity factor using the table below or check via a contact probe.
It is very difficult to get an accurate temperature reading on untreated metals.
A coating like paint, oil or emission adhesive tape applied to the object will considerably
improve the accuracy of the measurement.
X-Viber manual
www.GlobalTestSupply.com
22
Enables or disables the alarm face
Changes the low Alarm level
Changes the high Alarm level
Turns the backlight ON or OFF
Changes the contrast ratio
A low number gives a higher
Changes the unit between °C
and °F
Changes the emissivity factor
The instrument is calibrated with
0.98
Temperature settings menu
Press the Info button and this window will appear.
Move the line with the Up or the Down buttons to the function you want to change.
Press the Left or the Right button to change the settings.
The settings in the Temperature Settings menu will automatically be used when the
Temperature window is opened the next time.
Press the ESC or OK button to exit to the Temperature function.
Press the ESC button to leave the Temperature function and go back to the
Measurement menu.
X-Viber manual
www.GlobalTestSupply.com
23
How to interpret vibration levels
smm/7.6524
222
A user with no previous experience to interpret the results is recommended to use the ISO
10816-3 standard together with a good portion of common sense.
Be prepared to find exemptions making the judgements harder than the standards, rather
than finding exemptions allowing for higher vibrations.
The standard normally calls for a measure in velocity based on mm/s RMS. To better
understand what this measure means it can be helpful to consider the reading as a mean
value of the back and forward motion. This measure gives a good understanding of the
amount of "break down energy", causing mainly wear and fatigue work, in the machine or
the structure being measured.
The instrument is measuring the total RMS-value of the vibration within the instrument
frequency range. This RMS-value is a special sum or average of all the different causes of
vibration.
EXAMPLE:
If the simultaneous vibration caused by unbalance is (4mm/s), by misalignment (2 mm/s)
and by the gear mesh (5 mm/s) then the total vibration measured on the VIBER-A is 6.7
mm/s.
Total vibration =
ISO standard 10816-3
The ISO standard 10816-3 is classifying the machines differently if the machines are
considered as flexible or rigid mounted. This reflects the location of the machines stiffbody resonance’s related to the basic running speed of the machine.
For instance, a machine supported by rubber or springs often have resonance’s at low
running speeds. The machine starts vibrate at a certain, low rpm. When the speed is
increased above these resonance frequencies the vibration is reduced. This machine is
considered flexible.
A resonance can easily be found when a flexible machine is running up or down in speed.
The resonances are located at the rpm´s where the vibration has a local maximum level.
X-Viber manual
www.GlobalTestSupply.com
24
Rigid Flexible Rigid Flexible
Group 1 and 3 Group 2 and 4
Industrial machines with power above 15kW and
nominal speeds between120 -15000 r/min
mm/s
Unit
0-1.4
1.4-2.3
2.3-2.8
2.8-3.5
3.5-4.5
4.5-7.1
7.1-11
11--
Extraction's from ISO 10816-3
Group 1:
Large machines with rated
power above 300kW.
Electrical machines with shaft
height H > 315mm
Operating speed ranges from
120 to 15000 rpm
Group 2:
Medium-sized machines with
a rated power above 15kW
up to and including 300kW
Electrical machines with shaft
height between 160 and 315
mm
Operating speed normally
above 600 rpm
Group 3:
Pumps with multivane
impeller and with separate
driver with rated power above
15kW.
Group 4:
Pumps with multivane impeller and with integrated driver with rated power above 15kW.
Modern machines have high rpm´s and flexible bearing-supports and foundations and can
be treated as flexible even when it is not mounted on rubber or springs.
The ISO 10816-3 standard allows for slightly higher limits when a foundation is considered
flexible than when if it is rigid. A conclusion from this is also that a resonant condition in
principle is not allowed or at least should be avoided at operating speeds. In practice this
also includes the double speed as well as any other natural excitation frequency such as
blade passage etc.
A great advantage with proper vibration measurements and the use of vibration standards
is that you can judge the future maintenance cost very reliably already at first start-up. If
you find levels above 3 mm/s RMS, you can be rather sure that the machine will cause
increased activities in maintenance. The specific cost and action is of course individual to
the machine design.
As always when using schematic judgement like this, be very careful to use common
sense in the application of the recommendations.
A certain machine is producing its specific vibration frequency pattern depending on the
transducer location and the machine properties.
The next logical step is therefore to apply filtering of the transducer signal to learn the
frequency behind the vibration and thus the mechanical fault. Use the Analysis function to
find the cause of the vibrations.
X-Viber manual
www.GlobalTestSupply.com
25
Looseness
By measuring the vibration on both sides of a bolt joint it is possible to find looseness in
the connection. Two machine parts joined together should have the same vibration level
on both sides of the joint.
Bolts fixed in concrete foundations should have the same vibration level as the concrete if
they are not loose.
Recommended vibration levels in mm/s and common findings
The following is in part an extraction of the old standard ISO 2372 class 4, large machines
on flexible foundations, with some common findings added.
This simplified list can be used, as a first consideration, when you approach a machine
newly commissioned or after some time in operation.
Take as a good housekeeping rule to investigate the reason for any machine that vibrates
above 3 mm/s RMS. Do not leave them above 7mm/s without being assured that they will
sustain long term operation without increased wear since the machines capable of that are
very few.
0 – 3 mm/s
Small vibrations, none or very small bearing wear, rather low noise level
3 – 7 mm/s
Noticeable vibration levels often concentrated to some specific part as well as direction of
the machine. Noticeable bearing wear. Seal problems occur in pumps etc. Increased noise
level. Try to investigate the reason. Plan action during next regular stop. Keep the
machine under observation and measure at smaller time intervals than before to detect a
deterioration trend if any. Compare vibrations to other operating variables.
7 – 18 mm/s
Large vibrations. Bearings running hot. Bearing wear-out cause frequent replacements.
Seals wear out, leakage of all kinds evident. Cracks in welding and concrete foundations.
Screws and bolts are loosening. High noise level. Plan action soonest. Do your best to
reveal the reason. You are wearing down investments quickly.
18 – mm/s
Very large vibrations and high noise levels. This is detrimental to the safe operation of the
machine. Stop operation if technically or economically possible considering the plant stop
cost. No known machine will withstand this level without internal or external damage.
Reduce any further running time to an absolute minimum.
X-Viber manual
www.GlobalTestSupply.com
26
Resonance
When working with vibrations in machine maintenance, you will soon find that resonance
is a common but rather unknown problem in modern machinery.
To understand a resonance you can compare with the string of a guitar. The string has its
natural basic tune that will ring as soon as the string is struck. The actual frequency of the
tune depends on the stiffness and the distributed mass of the string.
All machines have similar built in "tunes" with corresponding properties consisting of
stiffness and a mass in the form of mechanical strings such as shafts, beams and floors
and in all mechanical parts.
If any natural excitation (= alternating force) in the machine has the same or nearly the
same frequency as a resonance frequency the vibration will be amplified in this machine
part, a much higher level will occur than would be the case if the resonance would be
shifted away from the excitation frequency.
One common resonance frequency is the critical speed of a shaft which depends on the
stiffness and mass of the shaft, but resonances exist in all machine parts as well as in
supporting beams and concrete floors.
A natural excitation force is for example unbalance at the running speed, misalignment on
mainly twice the speed, gear mesh forces etc.
THE BASIC RULE IS THAT THE RESONANCE’S OF ANY PART IN THE MACHINE
SHOULD NOT COINCIDE WITH ANY NATURAL IMPULSE IN THE MACHINE.
To identify the presence of a resonance, measure the vibration levels in three
perpendicular directions at the bearings. If you find a measurement with at least three
times higher level than in the other directions you should consider a resonance a likely
possibility. The resonance is amplifying the mechanical force and thus gives a high
vibration in that direction. The resonance makes the machine unnecessarily sensitive to
mechanical forces.
It is possible to locate the resonance peak while the speed of the machine is changing.
The resonance frequency is located at that rpm where the vibration has a local maximum.
The proper action against a resonance is very different depending on its location,
operating conditions etc. It will normally require good experience to alter the situation. One
reason is that the modification affects the basic mechanical design of the machine and
where you normally require the competence of the machine designer.
We recommend you however not to hesitate to consider such modifications since the
change of the resonance frequency normally is cheap compared to the high maintenance
cost that will follow any attempt to run a machine in long term operation under the
influence of a resonance.
A TEMPORARY AND SOMETIMES PERMANENT SOLUTION TO A RESONANCE
PROBLEM IS TO CHANGE THE SHAFT SPEED OF THE MACHINE, IF POSSIBLE.
X-Viber manual
www.GlobalTestSupply.com
27
Analysis
Frequency range in Hz
2 to 800
4 to 1600
8 to 3200
10 to 6400
old ISO range 10 to 1000Hz
This part of the
window shows
the total vibration.
This part of the
window shows the
selected peak.
When this text is shown
the measurement is
temporally stopped.
This part of the
window shows
the selected unit.
This part of the
window shows the
selected frequency
range.
This part of the
window shows
the peak level.
This part of the
window shows
the frequency of
the peak.
Move the line with the Up or the Down button to
Analysis.
Press the OK button and the X-Viber starts
to measure.
The analysis window is used when the vibration has to be analysed more in detail and at
balancing.
The Analyse window is divided in to two parts. The left side shows the total vibration while
the right side shows the 5 highest vibration peaks.
Press the AUX button to hold the measurement.
Press the AUX button again or the Ok button to continue measuring.
Press the Up or the Down button to change the frequency range.
The list below shows available frequency ranges.
X-Viber manual
www.GlobalTestSupply.com
28
This part of the
window shows
the peak level.
This part of the
window shows
the frequency of
the peak.
Metric
Imperial
g rms
g rms
g Peak
g Peak
g P-P
g P-P
mm/s rms
in/s rms
mm/s Peak
in/s Peak
mm/s P-P
in/s P-P
m rms
mils rms
m Peak
mils Peak
m P-P
mils P-P
mm rms
thou rms
mm Peak
thou Peak
mm P-P
thou P-P
m/s rms
m/s Peak
m/s P-P
Note!
With this function you can find the cause of the vibration by comparing the
measured frequencies with calculated fault frequencies.
Use lowest possible frequency range this will increase the accuracy of the
frequency measurement.
Press the Left or the Right button
to change the unit or average.
The table besides shows the available units.
The instrument will automatically select the unit and average from the Settings menu.
The highest peak is pre-selected in the right side of the window.
Press the OK button to change to
the next filtered peak.
The peaks are presented according to
the level of the peaks
with the highest peak as
number 1.
www.GlobalTestSupply.com
X-Viber manual
29
Analysis settings menu
Turns the backlight ON or OFF
Changes the contrast ratio
A low number gives a higher
Changes the frequency range for
the total level measurement
Changes the vibration unit and
average
Changes the unit for frequency
Press the Info button and this window will appear.
Move the line with the Up or the Down button to the function you want to change.
Press the Left or Right button to change the settings.
The settings in the Analysis Settings menu will automatically be used when the Analysis
window is opened the next time.
Press the ESC button to exit to the Analysis function.
Press the ESC button to leave the Analysis function and go back to the
Measurement menu.
X-Viber manual
www.GlobalTestSupply.com
30
Balancing
Balancing with X-Viber
First check that dominating vibration is
caused by an unbalance.
The 1-FILTERED vibration should have the
same frequency or Hz as the running
speed of the machine.
Do not change the position of the vibration transducer after the start of the balancing
procedure.
Balancing using this method requires only three consecutive trial runs and changing the
balance status of the rotor.
Only measurement of the vibration level is needed.
Balancing will of course only reduce the vibration caused by unbalance.
A balancing round will often be a good approach and a first attempt to find the reason for
increased vibration. If the balancing attempt is not successful, the cause can be loose
rotor parts etc.
If the machine speed is variable, be sure to choose the same speed during every trial run.
Do not search the speed that gives the highest vibration. Such speeds mostly show nonlinear results.
Start the procedure by measuring on the bearings looking for high levels in major
directions. Choose a point that should have a good connection to a balancing plane where
you can put in a weight in the machine. You must use the same radius for the trial weights
and the balancing weights.
X-Viber manual
www.GlobalTestSupply.com
31
This is the procedure for the TWO-POINT BALANCING METHOD:
TRIAL RUN 1:
TRIAL RUN 2:
TRIAL RUN 3:
Select the running speed and choose the
measuring point. Measure and note the vibration
level and stop the machine. Note this vibration as
reading A.
In this example the vibration is 14.64mm/s at
2949rpm
Put in a trial weight in the balancing plane. Note the
location and size of the balancing weight. Use its
weight, volume or length (if you have a band material)
as a measure of the size of the trial weight.
Call the trial weight P in any measure proportional to the
weight.
Measure and note the vibration level and stop the
machine.
Note this vibration as reading 2.
In this example we added 40grams at the radius
320mm in position 0°.
The vibration becomes 9.58mm/s and the speed
was almost the same 2952rpm.
Move the trial weight 180 degrees to a position opposite
to the first location.
Measure and note the vibration level and stop the
machine.
Note this vibration as reading 3.
In this example we added 40grams at the radius
320mm in position 180°.
The vibration becomes 21.34mm/s and the speed
was almost the same 2953rpm.
X-Viber manual
www.GlobalTestSupply.com
32
AA
A
B/2
CALCULATION
A
B/2
C/2
A
B/2
C/2
C/2
D
We now have all the necessary machine information to start the calculations.
Compare the vibration levels reading 2 and reading 3.
Call the highest of reading 2 and reading 3 for B and the smallest for C.
In our example reading 3 (21.34) is the highest and we call it B and reading 2 (9.58) is
the smallest and we call it C.
Draw a figure where you use a length measure proportional to the actual vibration level
measured on each reading A, B and C respectively. Use a scale that gives you as large a
figure as possible. The accuracy depends largely on the size of the figure.
STEP 1: Draw A as a horizontal line. Use a scale so you
make a large figure and good use of the paper.
STEP 2: Draw an arc centred at the left end of A having the
radius equalling to 1/2 (HALF) the length of B.
STEP 3: Draw an arc centred at the right end of A
having the radius equalling to 1/2 (HALF) the length of
C. Mark the crossing of the two arcs. Draw a line
starting from the right end of A through the crossing of
the two arcs and with the length proportional to C.
STEP 4: Join the upper tip of C with the left end of A so
that a triangle shaped figure is made. Mark this new line
as D. The angle position of the balancing weight is the
angle () in the left corner of the figure between line D
and base line A.
In our example the angle () is measured to be 38°.
X-Viber manual
www.GlobalTestSupply.com
33
THE SIZE OF THE BALANCING WEIGHT
The SIZE of the balancing weight that you should put on the balancing plane is
proportional to the size of the trial weight with the same relation as the line A to D in the
figure. In other words:
the trial weight P * the length of A
Balancing weight BW = ------------------------------------------------ the length of D
In our example will the balancing weight BW = 40grams x 14.64 / 7.5 = 78grams on the
same radius 320mm.
You can measure A and D in the figure. You may soon realise that best results are
obtained when the triangle has approximately equal sides.
THE ANGLE POSITION OF THE BALANCING WEIGHT
When we had the trial weight in position C we had a
lower vibration than in position B. The trial weight in
position C must therefore be on the proper half of the
rotor.
The balancing weight should be positioned () degrees
from the position of the trial weight C.
The angle () can be measured on your rotor in either
the direction against or with rotation. You must make a
qualified guess and try one alternative. If the vibration is
not reduced the other location may be the better.
In our example we first placed 78grams 38 degrees in
the direction of the rotation.
The result was not good.
We then moved the 78grams 38 degrees in the
direction against the rotation.
The result was very good.
The vibration became that low that the unbalance
vibration became the second highest peak and we
hade to select the 2-FILTERED to find the same
frequency as the running speed.
The balancing may be stopped when the highest radial direction is below 3 mm/s rms.
X-Viber manual
www.GlobalTestSupply.com
34
MISCELLANEOUS
222
22ACB
PA
BV
222
22
222
cos
ACBA
CB
If you prefer to calculate the balancing weight, this is the formula:
;
TROUBLE HINTS
The most difficult task in balancing is to guess a suitable size of the trial weight because
we do not know the unbalance sensitivity of the machine. The whole balancing procedure
depends on the changes in vibration level that occur when we add a trial weight. If the trial
weight is too small compared to the unbalance we can not measure any changes in the
vibration levels and the measurements A, B and C become almost equal. The triangle in
our figure becomes flat.
If the trial weight is too large compared to the unbalance the measurements B and C
become very large compared to the measurement A and the triangle in our figure
becomes very high and narrow.
This produces an uncertainty in our calculations.
If the triangle can not be formed well, use the results to guess a better size of the trial
weight or try a location of the trial weight a quarter turn away from the first position.
If the triangle can not be formed at all there are often two major reasons:
Something is loose. Check the fit between the rotor and shaft. Check bolt joints.
Is dirt gradually falling off during each run?
The vibrations in these cases are not caused by an unbalance. You are trying to balance a
machine where the unbalance is very small and where the vibration comes from other
faults, e.g. misalignment, gearbox, cavitations in pumps etc.
X-Viber manual
www.GlobalTestSupply.com
35
This is the procedure for the THREE-POINT BALANCING METHOD:
R=13,62
A= 0°
B=120°
C=240°
R=9,2
A
B
C
The three point method gives you both the size and the location angle (a) without
guessing the position of the balancing weight. Be sure to choose the same speed during
all trial runs and the same radius for all trial weights and the balancing weight.
Step 1:
Step 2:
With the rotor operating at normal speed, measure
and note the original vibration level as R1.
In our example we measured the vibration at the
running speed 1-FILTERED to be : R1 = 13.62 mm/s
Draw a circle with a radius proportional to R1 and
then use the same scale for the rest of the procedure.
Stop the rotor. Mark three points on the rotor,
approximately 120 degrees apart where we later will
add trial weights. Call these points A, B and C. These
three points do not need to be exactly 120 degrees
apart but the accuracy decreases the more you leave
equal spacing. You have to measure your chosen
angle position as accurate as possible.
Put in a trial weight in position A.
Start the rotor and measure the vibration level R2.
In our example we added 40 grams at 320 mm
radius and the vibration became R2 = 9.2 mm/s.
Draw a circle proportional to R2 with the centre in
position A, the red circle.
X-Viber manual
www.GlobalTestSupply.com
36
Step 3:
R=14,36
A
B
C
R=21,03
A
B
C
Move the same trial weight to position B.
Start the rotor and measure the vibration level R3.
In our example we moved the 40 grams at 320 mm
radius to position B and the vibration became R3 =
14.36 mm/s.
Draw a circle proportional to R3 with the centre in
position B, the green circle.
Step 4:
Move the trial weight to position C.
Start the rotor and measure the vibration level R4.
In our example we moved the 40 grams at 320 mm
radius to position C and the vibration became R4 =
21.03 mm/s.
Draw a circle proportional to R4 with the
centre in position C, the blue circle.
www.GlobalTestSupply.com
X-Viber manual
37
Step 5:
5
1
RofLength
RofLengthWeightTrial
WeightBalancing
gramsBW 4.72
52.7
62.1340
All the three circles R2, R3 and R4 intersect in a
common point D.
Draw a line from the centre of the circle R1 to the point
D. Call this line R5. Measure the length of this line
using the same scale as before.
In our example R5 = 7.52 and it is the vibration level
caused by the trial weight P if P was the only
unbalance in this rotor.
Measure the angle in the drawing. This is the
angular position of the balancing from position A
Step 6:
Calculate the size of the balancing weight using the formula:
In our example the balancing weight will be:
The balancing may be stopped when the highest radial direction is below 3 mm/s rms.
If you want to further improve the balancing status you must start from the beginning and
use a smaller trial weight.
www.GlobalTestSupply.com
The balancing weight 72.4 grams was placed 38
degrees from position A.
The result was very good.
The vibration became that low that the
unbalance vibration became the third highest
peak and we hade to select the 3-FILTERED to
find the same frequency as the running speed.
X-Viber manual
38
Schematic of the vibration input
Type of operation
Max. mA
Instrument switched ON
<100
Additional for back-light
~30
Additional when measuring
~30
Additional at speed or temp. measurement
~20
Instrument switched OFF
<0.1
Do not connect another type of charger. This might permanently destroy
the instrument.
39k
20VDC
Min. 2mA constant current
121
2
39k
Battery
The battery pack consists of 4 NiMH with 2000mAh and fully charged is the capacity
enough for 6 hours continued operation.
Because the internal discharged in the battery is quite high in NiMH batteries always
charge the batteries the day before use.
A full charging process takes about 4 hours.
The instrument can be used with only the battery charger connected even when the
battery pack is removed.
www.GlobalTestSupply.com
X-Viber manual
39
Instrument Info menu
This icon shows the present
battery capacity.
Full black = full capacity
Info
Battery: 5.18V
Software ver: 4.11
Calibrated at: 20-02-2005
Route status: 114/ 74
Info
Battery: 5.18V
Software ver: 4.11
Calibrated at: 20-02-2005
Route status: 114/ 74
This line shows the software
version number.
This line shows the date of
Info
Battery: 5.18V
Software ver: 4.11
Calibrated at: 20-02-2005
Route status: 114/ 74
Info
Battery: 5.18V
Software ver: 4.11
Calibrated at: 20-02-2005
Route status: 114/ 74
This line shows the present
battery level.
Full = 5.5 Volts
Empty = 4.6 Volts
Battery too low
The instrument will
switch off
This window will appear on top
of any menu when the battery is
below 4.1 Volts
Info
Battery: On charger
Software ver: 4.11
Calibrated at: 20-02-2005
Route status: 114/ 74
The text On charger will appear
when the batteries are charging.
This line shows the present
Route status. In this example
there are 114 points and 74 are
measured.
Move the black line over Info with the Up
or the Down button and
press the OK button.
The info menu gives you information about the software version and the date of
calibration. If you have problems with the instrument always refer to these numbers and
the serial number.
X-Viber manual
www.GlobalTestSupply.com
40
Backup battery
Replace
backup battery!
Replace
backup battery!
The instrument has an internal Lithium battery mounted on the main pc-board. This battery
works as backup battery for the real time clock and the CMOS memory.
This message will appear only when the
instrument is switched ON. When this message
is shown, the small Lithium battery must be
replaced.
The “lifetime” of this battery is approximately 5
years, but will be considerably extended, if you
keep the normal battery pack charged and
mounted on the instrument.
RESETTING THE INSTRUMENT
The following procedure must be followed to RESET the X-Viber Instrument:
Switch OFF the instrument.
Press and keep pressed both the ESC and OK buttons.
Press at the same time the ON/OFF button for 2 seconds.
The instrument will perform the following task:
A memory test will be done. In case of a defective memory chip, an alert message will
appear and the instrument will not continue the tasks.
All system variables will be initialized
All settings will be set to the default values (See next page).
The route data will be deleted and the route files will be initialized.
The RESET action must be done if any abnormal functionality of the instrument occurs.
NOTE. The instrument LOGO screen will be assembled from separate dots only after a
RESET action.
Otherwise, when the instrument is powered ON, the last screen before the shut down will
be restored.
NOTE. If the battery pack is removed from the instrument and placed back, no RESET will
occur. The route data and other settings will still remain in the memory.
X-Viber manual
www.GlobalTestSupply.com
X-VIBER default settings after restart
SETTINGS
DESCRIPTION
DEFAULT VALUE
SCREEN
Contrast
LCD contrast adjustment, a number from 1 to 10
5
ALL
Backlight
LCD backlight – ON or OFF
OFF
ALL
Power off
ENABLES or DISABLES automatic instrument power off, if no key is
pressed within a set time period of time.
ENABLE
MAIN MENU
Power off in
Determines the time for automatic instrument power off. Can be any
from the following series: 1,2,5, 10 minutes or Never.
2
MAIN MENU
Unit
METRIC or IMPERIAL units
METRIC
MAIN MENU
Acc. sens.
Accelerometer sensitivity in mV/g
100
INFO MENU
Auto advance
YES or NO. YES will trigger an automatically advance to the next
point when the measurement is finished.
NO
ROUTE MENU
Unit
Vibration unit for total value measurement.
mm/sec
TOTAL VALUE MENU
Range
Frequency range for total value measurement. Can be selected the
following ranges: 2 to 800 Hz, 4 to 1600 Hz, 8 to 3200 Hz or 16 to
6400 Hz.
2 – 1600 Hz
TOTAL VALUE MENU
Alarm
ENABLE or DISABLE. If the alarm is ENABLED in time of the
measurement a specific icon will appear according with the Alarm
level.
DISABLE
TOTAL VALUE MENU
ENVELOPE MENU
BC MENU
HI Alarm
Alarm limit for TOTAL value, BC and Envelope measurement.
0.0
TOTAL VALUE MENU
ENVELOPE MENU
BC MENU
Min Freq
Low pass corner filter for Bearing Condition measurements. Can be
set to 500, 1000, 2000 or 3000 Hz.
1000 BC MENU
Emis.fact.
The emissivity factor for temperature measurements that
compensates for different surface properties.
0.98
Technical Data
Authorized distributor
Transducers
Standard vibration transducer Accelerometer type VMI199-28
Sensitivity 100mv/g max measu ring range ±50g
Frequency range (+/-3db) 0.5-15000Hz
Resonance frequency 34000Hz
Temperature range
-50oC … +121oC
Mounting Magnet holder, ha nd held or measuring pointer
Cable length 1m
Vibration input electrical specifications
Maximum input signal +/-5V Peak
Sensitivity, standard settings Accelerometer 100mV/g
Current- and voltage supply to transducer +2.1mA constant current at max 20V
Built-in speed transducer (tacho) Infrared photocell
Measuring range 30 – 120.000 rpm corresponding to 0.5 -200Hz
Measuring distance 0.15 – 1m
Measuring object Reflex tape on the shaft
Automatic comparison with selectable alarm levels Yes, 2 different l imit values
Built-in temperature sensor
Measuring range
-20 to +120°C, adjustable emission factor
Accuracy ±2°C
Resolution 1°C
Measuring distance 0.2 till 0.5m
Automatic comparison with selectable alarm levels Yes, 2 different l imit values
Measuring properties
Total vibration level:
Selectable frequency ranges 2-800Hz, 4-1600Hz, 8-3200Hz, 10-6400Hz and ISO 10-1000Hz
Selectable units, Metric mm/s, um, mm, m/s, g
Selectable units, Imperial in/s, mils, thou, g
Selectable type of average RMS, Peak, P-P
Automatic comparison with selectable alarm level Yes, 1 limit value
Total Envelope level
Frequency range 500 - 6400Hz
Envelope level within the frequency range 1 – 1000Hz
Unit gE RMS
Automatic comparison with selectable alarm level Yes, 1 limit value
Total Bearing Condition value
Frequency range at Bearing Condition Selectable between 0.5 – 6.4kHz, 1 -8kHz, 2 – 8kHz, 3 -8kHz
Unit g RMS
Automatic comparison with selectable alarm level Yes, 1 limit value
Analysis
Same properties as with Total vibration level
Automatic analysis of 5 frequencies with the highest l evels
Route
Downloaded from the X-Trend PC-software
Memory capacity
Appr. 999 measuring points, including Total vibration l evel, Bearing
Condition level and Envelope level
Balancing
Same properties as with Total vibration level
Methods Single pl ane with vector method (standard) and 3-point balancing (option)
Frequency range 2-200 Hz/ 120-12000 r.p.m.
Spectrum in Route (Option)
Memory capacity Appr. 9 99 spectra
Frequency range 2-800Hz, 8-3200Hz, 10-6400Hz
Resolution 1.5Hz, 3.5Hz, 5Hz
Miscellaneous
Dynamic measuring range >80dB
Auto scaling Yes
Main processor Micro processor 38Mhz
Internal memory 512kb Flash, 512kb RAM, 8MB Memory Card
Graphic Display 68x124 pixels with background light
Real time Clock Yes
Computer communication USB max 256kbaud/s
Power supply 4 x R6 2000-2700m Ah rechargeable Nimh batteries
Power usage at measurement / sleep mode 120mA / 25uA > 10 hours of c ontinuous operation
Min/max environment temperature while measuring
-20oC … +50oC
Dimensions 180 x 80 x 40mm
Weight 400grams including batteries
www.GlobalTestSupply.com
Loading...