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Summary of Contents for VMI VIBER X3
- Page 1 Viber X3 Viber X3™ Instrument Manual Instrument Manual Machine Condition Analyzer Machine Condition Analyzer Vibration Measurement Instrument...
- Page 2 Ver. 1.6 Eng FW 3.0...
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Page 3: Table Of Contents
How to interpret vibration levels .............. 1 ISO standard 10816-3................ 2 Vibration analysis ..................1 Recommended vibration levels in mm/s and common findings ..1 Resonance ..................2 Recommended bearing condition levels........... 3 Listening to bearing sound ..............3 Balancing with VIBER X3™ ................. 1... - Page 4 TWO-POINT BALANCING METHOD ........... 2 8.1.1 TRIAL RUN 1 ................2 8.1.2 TRIAL RUN 2 ................2 8.1.3 TRIAL RUN 3 ................3 8.1.4 CALCULATION ................3 8.1.5 MISCELLANEOUS ............... 5 BALANCING USING THE THREE-POINT METHOD ......6 Technical data ................... 1...
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Page 5: Important Information
VMI takes no responsibility for any accidents on people and machines. VMI and our authorized dealers will take no responsibility for damages on machines and plants as the result of the use of Viber X3 measurements. -
Page 6: Introduction
2 Introduction VIBER X3™ is designed for maintenance/repairer and operators personnel. It is an excellent tool, for basic condition monitoring checks, easy to use and reliable for status analyse. The VIBER X3™ instrument has the following features: Accurate measurements for 3 selectable frequency ranges. -
Page 7: Scope Of Supply
2.1 Scope of supply A complete delivery is: Viber X3™, machine condition analyzer • A high performance accelerometer • 1 m transducer cable • Extension tip • Battery charger • Head phones • All this together are available in a sturdy, airtight, chemical resistant, dust-... -
Page 8: Instrument Keypad And Led's
2.2 Instrument keypad and LED’s The VIBER X3™ keypad has: 1 ON/OFF key LED’s LED’s LED’s 1 MENU key 4 Arrow keys Arrow key Arrow key Arrow key 3 Leds* Menu key MENU key Green LED lights, when any key is pressed. -
Page 9: Screen Descriptions
3 Screen descriptions 3.1 Vibration measurement screen This is the default screen, shown when the instrument starts. It gives you the total value within It gives you the total value within the selected frequency range, the bearing condition value and also the frequency of the equency of the highest peak in the spectrum range. - Page 10 The frequency appears as follows: The Frequency range of the highest peak in relation to the frequency range setting is described The Frequency range of the highest peak in relation to the frequency range setting is described in the below table, the limit of the maximum frequency of the peak is 1 000 Hz 000 Hz or 60 000 CPM.
- Page 11 Select an item with the (UP) and (DOWN) arrow keys. Change the settings of the selected item with the (LEFT) and (RIGHT RIGHT) arrow keys. Auto-shutoff DISABLED Settings 20 sec. Unit mm/s rms Selected item Range 2-1600 Hz To exit Settings menu, just press again the (MENU) key.
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Page 12: Analysis Measurement Screen
3.2 Analysis measurement screen In the analysis screen you are able to see the total value as well as the amplitude and In the analysis screen you are able to see the total value as well as the amplitude and frequency of the five first peaks in the spectrum range. - Page 13 When the (MENU) key is pressed, the Analysis Settings menu is shown. is shown. The following item settings are available: Item Value Notes Backlight ENABLED or DISABLED Auto-shutoff ENABLED or DISABLED Shutoff after 60 seconds Shutoff after 60 seconds 20 sec, 30 sec, 40 sec, 1 min, 2 min Set the Auto Set the Auto-shutoff time Setting...
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Page 14: Temperature Measurement Screen
3.3 Temperature measurement screen In the analysis screen you see the temperature of the object you are measuring. If you have enabled the audio (see audio screen) you may also at the same time listen to the bearings. In the upper right corner you will see the battery status and if the charger is plugged in or not. Temperature °C Stability bar... - Page 15 Direct the IR temperature transducer towards the surface you want to measure. Keep a towards the surface you want to measure. Keep a distance of approximately 200-500 mm (8- 20 inches) between the instrument and the object between the instrument and the object. Reduce the distance between the object and the instrument in accordance with the surface and the instrument in accordance with the surface size.
- Page 16 Emissivity: Set the coefficient for surface reflection factor (Emissivity factor) using the table below or using the table below or check via a contact probe. Material Emissivity factor Heat sink, black anodized 0.98 Paper 0.97 Black paint, matt 0.97 Warning! Warning! Ice, smooth 0.97...
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Page 17: Sound Screen
When a headphone set is connected to the Viber X3™, the Sound Screen can be used to adjust the sound volume (depending on hardware version there is also a volume control on the there is also a volume control on the headphone cord). - Page 18 As safety precautions and to save battery the audio settings are always reset are always reset, turning the audio off, when the instrument is started. When the (MENU) key is pressed, the Sound Settings menu is shown. Note: With a headphone inserted, at the Note: With a headphone inserted, at the Settings maximum...
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Page 19: Warning Messages
4 Warning messages The following message may appear in normal operation: This message may appear if the calibration data is lost from the Calibration permanent FRAM memory or if the calibration data are corrupted. lost! In such cases, the instrument must be re-calibrated; otherwise it will measure incorrectly. -
Page 20: Battery Status Bar
5 Battery status bar In every measurement screen, at the upper side, a battery status bar is shown. The status bar indicates the battery voltage, as follows: External charger plugged into the instrument. Battery is charging. If the charger is removed, the status bar shows the remaining battery voltage: 3.6 V When the voltage exceeds 4.0 V, the battery status bar indicates full battery. - Page 21 The instrument is powered by three NiMh 1,2V AA batteries. gasket When replacing the batteries use only high power rechargeable NiMh batteries NOTE: The battery voltage is only indirect capacity detection. For a weak battery, even if the voltage is high due to a complete charging, the battery voltage will drop quickly.
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Page 22: How To Interpret Vibration Levels
6 How to interpret vibration levels A user, who has little experience in interpreting vibration results, should use the ISO 10816-3 standard or the basic guide below, together with a good portion of common sense. The standard normally calls for a measure in velocity based on mm/s RMS. To better understand what this measure means, consider the reading as a mean or average value of the back and forward motion of the machine. -
Page 23: Iso Standard 10816-3
6.1 ISO standard 10816-3 The ISO standard 10816-3 classifies machines differently whether the machines are considered as flexible or rigid mounted. This reflects the location of the machines stiff-body resonances related to the basic running speed of the machine. For instance, a machine supported by rubber or spring, have resonances at low running speeds. -
Page 24: Vibration Analysis
7 Vibration analysis 7.1 Recommended vibration levels in mm/s and common findings The list and table below can be used, as a first consideration, when you approach a machine newly commissioned or after some time in operation. Investigate the reason for any machine that vibrates above 3 mm/s RMS. -
Page 25: Resonance
7.2 Resonance A resonance can easily be found when a flexible machine is running up or down its speed. The resonance frequencies are located at the rpm’s, where the vibration has a local maximum level. 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. -
Page 26: Recommended Bearing Condition Levels
BC-value. With the VIBER X3™ you can both listen and look at the BC value and vibration at the same time. can both listen and look at the BC value and vibration at the same time. -
Page 27: Balancing With Viber X3
8 Balancing with VIBER X3™ This chapter describes how you can perform simple balancing with your instrument. During the balancing procedure keep in mind that: It is only possible to balance machines, where the unbalance is the major cause of •... -
Page 28: Two-Point Balancing Method
TWO-POINT BALANCING METHOD 8.1.1 TRIAL RUN 1 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. 8.1.2 TRIAL RUN 2 Put in a trial weight in the balancing plane. Note the location and size of the balancing weight. -
Page 29: Trial Run 3
8.1.3 TRIAL RUN 3 Move the trial weight 180 degrees to a position opposite its first location. Measure and note the vibration level and stop the machine. Note this vibration as reading 3. 8.1.4 CALCULATION We now have all the necessary machine information to start the calculations. Compare the vibration levels reading 2 reading 3. - Page 30 with the left end of that a triangle shaped figure is made. Mark this new line as D. The angle position of the balancing weight is the angle (a) in the left corner of the figure between line and base line A. 8.1.4.1 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...
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Page 31: Miscellaneous
8.1.5 MISCELLANEOUS If you prefer to calculate the balancing weight, this is the formula: − α − ⋅ ⋅ − ⋅ 8.1.5.1 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. -
Page 32: Balancing Using The Three-Point Method
8.2 BALANCING USING THE THREE-POINT METHOD The three point method gives you 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: With the rotor operating at normal speed, measure and note the original vibration level as R1. - Page 33 Step 4: Move the trial weight to position B. Start the rotor and measure the vibration level R3. In our example = 10mm/s. Draw a circle proportional to with the centre in position B. Step 5: Move the trial weight to position C. Start the rotor and measure the vibration level R4.
- Page 34 Step 7: Calculate the amount of the balancing weight using the formula: ∗ = Balancing weight = Trial weight = the original unbalance reading or the length of R1 in your selected scale = the measured resultant vector or the length of R5 in your selected scale If in our example the trial weight = 87 grams, then the balancing weight will be:...
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Page 35: Technical Data
9 Technical data Vibration transducer Accelerometer Standard 100 mV/g± 5% Vibration 50 g RMS Input amplitude range Bearing condition 5 gBC 2 – 1600 Hz Note 1 Vibration 4 – 3200 Hz Frequency range Note 2 10 -1000 Hz Bearing condition Normal 1.5 to 20 KHz Note 2 Vibration units... - Page 36 Note 5b. Over 0.03 gBC Note 5c. Emissivity factor must be set in accordance with the target surface. Note 6. Capacity of the batteries can vary depending on hardware revision. Min 2500 mAh. Note 7. Operating time depends on backlight, volume level and batteries used. Backlight adds 40mA and the sound volume up to 150mA.
- Page 37 Vibration Measurement Instrument International AB (VMI) Warranty disclaimer VMI warrants the products to be free from defects in material and workmanship under normal use and workmanship under normal use and service within two years from the date of purchase and which from our examination shall disclose to our service within two years from the date of purchase and which from our examination shall disclose to our reasonable satisfaction to be defective.
- Page 38 VMI International AB Torsgränd 15 Authorized distributor SE-603 63 Norrköping, Sweden Tel. +46 11 311667 Fax. +46 11 311678 E-mail: info@vmiab.com www.vmiab.com...
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