PRUFTECHNIK VIBTOOL Operating Instructions Manual
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PRUFTECHNIK VIBTOOL Operating Instructions Manual

PRUFTECHNIK VIBTOOL Operating Instructions Manual

Machine condition via bluetooth
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®
VIBTOOL
®
Machine condition
via Bluetooth
Operating instructions
Edition February 2009
Version 1.02
Order number VIB 9.497 G
Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)
Dear Customer,
If you have any suggestions for improving
this instruction manual or the instrument
itself or any of its accessories, please let us
know.
PRÜFTECHNIK AG
Fax: +49 (0)89 99616-300
eMail: info@pruftechnik.com

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  • Page 1 ® Advanced Test Equipment Rentals www.atecorp.com 800-404-ATEC (2832) VIBTOOL ® Machine condition via Bluetooth Operating instructions Dear Customer, If you have any suggestions for improving this instruction manual or the instrument itself or any of its accessories, please let us know.
  • Page 2 Display ................ 12 VIBTOOL sensors and connections ......12 Rechargeable battery ..........13 Battery charge state ............13 How to connect the VIBTOOL charger ......... 13 VIBTOOL behavior during charging ........14 Typical measurement procedure ........15 Bluetooth operating mode ..........15 ‘Preset measurements’...
  • Page 3 Cavitation measurement ........39 What is cavitation? .............. 39 Cavitation evaluation ............40 Ideal measurement position ..........40 Cavitation measurements with VIBTOOL ..... 41 Cavitation measurement display .......... 41 RPM measurement ..........43 Interference from external light sources ....... 44 RPM measurement display ..........

  • Page 4: Introduction

    External vibration or temperature probes can be plugged in to measure at locations that are difficult to reach. VIBTOOL's primary function is as a 'multimeter' for general on-the-spot measurements. Engineers can walk around the machine hall with VIBTOOL and take immediate measure-...
  • Page 5 The relevant safety regulations must be observed during measurements on machines. Attention! Authorized use - VIBTOOL may only be used to record machine vibration signals, rotational speed and temperature values as well as condition parameters of roller bearings in industrial environments.
  • Page 6 Introduction Explosion hazardous areas • VIBTOOL with intrinsic safety (VIB 2.700 EX) may only be used with rechargeable batteries with the following approval: ZELM 05 ATEX 0243 U • Rechargeable batteries must not be charged in explosive environments! Only VIB 2.720 (EU), VIB 2.721 (USA) or VIB 2.722 (UK) charging units may be used.
  • Page 7 Introduction About this manual This manual describes the main functions of the VIBTOOL instrument (type: VIB 2.700 EX / firmware version: 1.0x) as well as the most important steps of its operation. Symbols used in this manual This symbol denotes information which must be fol- lowed in order to avoid damage to the system or other equipment.

  • Page 8: Program Overview

    Overview Program overview Operating modes Press M to switch on VIBTOOL Bluetooth mode VIBTOOL works in conjunction with a PDA computer. Measurement parameters and results are exchanged via Bluetooth connection. See page 15 for details. Press NEXT Preset measurement VIBTOOL works autonomously. Only the preset measurements can be carried out and the results can only be displayed.

  • Page 9: Measurement Modes

    Overview Measurement modes Vibration measurement Machine vibration at a glance See page 25 for details. Bearing diagnosis Monitors bearing condition See page 29 for details. RPM measurement Accurate non-contact RPM mea- surement. See page 43 for details. Temperature measurement Extremely quick, easy, and accurate See page 47 for details.
  • Page 10 empty page...

  • Page 11: Vibtool Operation

    The firmware revision and build number will be briefly displayed before the device turns off (p. 52). VIBTOOL turns off if no key is pressed for more than 10 minutes. VIBTOOL also turns off if any key is continuously...

  • Page 12: Display

    VIBTOOL sensors and connections Rear view A rear view of VIBTOOL is shown below. Here, it is possible to extend and retract the temperature probe as indicated by the arrows. Temperature probe...

  • Page 13: Rechargeable Battery

    Connect the VIBTOOL charger to the charging socket on the top of the instrument. Procedure: 1. Flip the VIBTOOL temperature probe out to expose the 5-pin socket. 2. Connect the charger to the 5-pin socket as shown in the diagram below. Check the notch for correct alignment.

  • Page 14: Vibtool Behavior During Charging

    VIBTOOL behavior during charging 1. VIBTOOL power is off – Power supply unit is plugged in: If VIBTOOL is not fully discharged, the device switches on and the messages ‘Char’ (= Charge) + ‘Strt’ (=Start) appear consecutively on the display.

  • Page 15: Typical Measurement Procedure

    Bluetooth pairing is not lost when the VIBTOOL is turned communicate. Pairing consists off. A VIBTOOL can only be connected with one host device of exchanging information that at a time. When the VIBTOOL is communicating with a host allows the two devices to device vie Bluetooth, the ∆...
  • Page 16 Measurement result The measurement result is shown on the display until the next measurement task is received. If an external sensor is connected to VIBTOOL, this sensor must also be used to carry out the measure- Note ment! In this case, the integrated sensors are not used...

  • Page 17: Preset Measurements' Operating Mode

    Operation ‘Preset measurements’ operating mode VIBTOOL contains the following preset measurement tasks that can be carried out at any time: • Vibration velocity - 10Hz to 1kHz • Vibration velocity - 2Hz to 1kHz • Shock pulse measurement - 36kHz bandpass (bearing condition evaluation) •...
  • Page 18 Operation 2. Shock pulse & Vibration acceleration: Switch on VIBTOOL and press NEXT until ‘Pr’ appears in the lower display field. Keep the DOWN key pressed until the following display appears: Shock pulse is selected when the ‘Bear- ing’ symbol flashes and ‘SP’ (= ’Shock Pulse’) appears on the display.
  • Page 19 Operation 3. Temperature / RPM / Cavitation: Switch on VIBTOOL and press NEXT until ‘Pr’ appears in the lower display field. Keep the DOWN key pressed until the following display appears and the respec- tive symbol flashes: - Temperature - RPM...
  • Page 20 Unit settings (Device setup) To change the units, proceed as follows: Switch on VIBTOOL and press NEXT until ‘dE’ appears in the lower display field: The VIBTOOL device setup is active when ‘unit’ and ‘dE’ appear on the display and the ‘dim’...
  • Page 21 Operation Overview Bluetooth operating mode Edit mode Vibration Vibration Temperature Rotational velocity acceleration speed...
  • Page 22 Turn off time (Device setup) To change the turn off time, proceed as follows: Switch on VIBTOOL and press NEXT until ‘dE’ appears in the lower display field (see previous pages). Press the UP key until ‘oFFt’ appears and the clock icon flashes in the display.
  • Page 23 Operation Overview Bluetooth operating mode Edit mode...
  • Page 24 Display battery status (Device setup) To display the battery status, proceed as follows: Switch on VIBTOOL and press NEXT until ‘dE’ appears in the lower display field (see previous pages). Press the DOWN key until ‘bA|xx’ ap- pears and the square icon flashes in the display.

  • Page 25: Vibration Measurements

    3, as well as other international standards which have been set on the same level. VIBTOOL fulfills all the known standards for vibration measurement. The RMS vibration value is an international measurement unit which shows whether the vibration of a rotating machine is acceptable.

  • Page 26: Iso Vibration Monitoring Standard

    Vibration measurements ISO vibration monitoring standard In order to monitor vibration severity according to the ISO 10816-3 standard, the threshold values must be set accord- ing to the appropriate machine classification. This classifi- cation is determined according to machine power and foundation characteristics as follows: ISO 10816-3 Group 1:...

  • Page 27: Ideal Measurement Position

    Vibration measurements Ideal measurement position When taking vibration measurements using VIBTOOL, care must be taken to position it correctly. If VIBTOOL is not held correctly against the machine, unreliable measure- ment values and damage can occur. So be sure to observe the following: •...

  • Page 28: Vibration Measurements With Vibtool

    Vibration measurements Vibration measurements with VIBTOOL During measurement keep the sensor firmly pressed against the measurement point and keep it still - measure- ment duration depends upon signal strength and stability: the stronger and more constant the measurement signal is, the quicker the display response will be.

  • Page 29: Bearing Diagnosis

    Bearing diagnosis Bearing diagnosis VIBTOOL uses the Shock Pulse Method to evaluate bearing condition. This method considers shock pulses which arise during the metal to metal contact present in damaged bearings. These shock pulses indicate distinct resulting frequencies and amplitudes. Two values, carpet and maxi- mum value, are used to evaluate the bearing condition.

  • Page 30: What Are Shock Pulses

    Bearing diagnosis What are shock pulses? Shock pulses are short duration pressure pulses which are generated by mechanical impacts. Mechanical impacts occur in all rotating rolling bearings because of irregulari- ties in the surfaces of the raceways and rolling elements. The magnitude of the shock pulses depends on the impact velocity and surface area.

  • Page 31: How Are Shock Pulses Actually Measured

    Bearing diagnosis How are shock pulses actually measured? Shock pulses excite the measurement accelerometer which is mounted in the load zone at its resonant frequency, typically at or around 30 kHz. A high-pass filter is used to eliminate low-frequency components such as those caused by shaft misalignment or unbalance.

  • Page 32: The Carpet Value

    Bearing diagnosis The carpet value Surface roughness causes a rapid sequence of minor shock pulses which together constitute the shock carpet of the bearing. This can be heard as a background noise level when pressing a screwdriver to your ear to listen to the The carpet value does not give bearing.

  • Page 33: Maximum Value

    Bearing diagnosis Maximum value Bearing damage (i.e. relatively large irregularities in the surfaces) causes single shock pulses with higher magni- tudes at random intervals (see the diagram below). These can sometimes be heard when pressing a screwdriver to your ear to listen to the bearing. The highest shock pulse value measured on a bearing is called its maximum value.

  • Page 34: The Measurement Location

    Bearing diagnosis The measurement location The preferred points of measurement are where the vibra- tion energy is transmitted to VIBTOOL as directly as possible. For machines which include rotating masses, the bearings and the mounting points of the machine serve as ideal points of measurement.

  • Page 35: Short Signal Path

    Bearing diagnosis 2. Short signal path The signal path between the bearing and the measurement point must be as short and straight as possible. Shock pulses lose strength over a long signal path (especially when it has a large cross section) and are dampened when deflected by bends in the path.

  • Page 36: Directly At The Bearing

    5. Metallic, flat, clean (preferably machine-faced) When taking bearing measurements using VIBTOOL, care must be taken to position it correctly. If VIBTOOL is not held correctly against the machine, unreliable measure- ment values and damage can occur so be sure that the mounting surface is flat and clean (preferably machine- faced).

  • Page 37: Bearing Diagnosis With Vibtool

    During measurement keep the sensor firmly pressed against the measurement point and keep it still - measure- ment duration depends upon signal strength and stability. VIBTOOL takes four successive individual measurements and uses the maximum value. Bearing diagnosis display The following display shows all the symbols which can appear during a bearing diagnosis measurement.
  • Page 38 empty page...

  • Page 39: Cavitation Measurement

    The source of the pulses can be localized by simply placing the VIBTOOL sensor on the inlet of the pump housing while the pump is running. What is more important is that it is possible to change the pump velocity or the suction height while measuring.

  • Page 40: Cavitation Evaluation

    Ideal measurement position When taking cavitation measurements using VIBTOOL, care must be taken to position it correctly. If VIBTOOL is held improperly against the machine, unreliable measure- ment values and damage can occur. Ensure that the measurement location is metallic, flat and clean, or if possible, use the VIB 8.610 countersink to prepare the...

  • Page 41: Cavitation Measurements With Vibtool

    Cavitation measurement Cavitation measurements with VIBTOOL During measurement keep the sensor firmly pressed against the measurement point and keep it still - measure- ment duration depends upon signal strength and stability: the stronger and more constant the measurement signal is, the quicker the display response will be.
  • Page 42 empty page...

  • Page 43: Rpm Measurement

    You simply locate a mark on the shaft or rotor, such as an oil mark, and point VIBTOOL in that direction. VIBTOOL then adjusts itself accordingly to the contrast between the oil mark and the background.

  • Page 44: Interference From External Light Sources

    1. Reflections from shiny objects can lead to instable signals because the light which VIBTOOL detects is fluctuating. 2. VIBTOOL must be pointed radially at the shaft and from underneath the shaft wherever possible. This avoids any interference from light coming from above.

  • Page 45: Rpm Measurement Display

    RPM measurement RPM measurement display The following display shows all the symbols which can appear during an RPM measurement. However, the sym- bols may not all appear simultaneously. Measurement value (RPM x 100) Unit: 1/s Symbol indicating Unit: RPMx100 RPM measurement Symbol indicating measurement Symbol lights up with each trigger pulse...
  • Page 46 empty page...

  • Page 47: Temperature Measurement

    Temperature measurement Temperature measurement VIBTOOL is also a convenient pocket thermometer. A built- in temperature probe makes it possible to measure both surface and liquid temperatures over a range of -30°C - 270°C (-22°F - 518°F). The temperature probe fits itself...

  • Page 48: Temperature Measurement Display

    Unit: Celsius or Fahrenheit temperature measurement Symbol indicating measurement error (instable signal, etc.) Measurement OK It can take several seconds for the VIBTOOL probe to reach the same temperature as the surface it is measur- Note ing. If necessary, press ‘M’ continuously to show a live display where you can see when the correct tempera- ture has been reached.

  • Page 49: Appendix

    Robustness VIBTOOL can easily be carried in a toolbox without risk of damage. VIBTOOL is very robust and has been drop-tested onto a hard surface from a height of 1 m.
  • Page 50 VIBTOOL for longer periods. Sudden changes in temperature and humidity (e.g. when VIBTOOL is stored in an office, but used in hot or cold work areas) can cause the optical sensor to fog over with condensation. In that case, give VIBTOOL about 10 minutes to reach the work area temperature before measuring RPM.

  • Page 51: Update Via Serial Cable

    Appendix Cleaning The VIBTOOL optical sensor must be clean and free from dust, etc. to avoid inaccuracy during measurement. Use a soft cotton cloth to remove any dirt from the optical sensor and display window. Also, avoid vigorous polishing to preserve the anti-reflective coating of the glass element.

  • Page 52: Firmware Version

    Click on ‘Continue’. • In the third screen click on ‘Complete’. Firmware version The version number is displayed when VIBTOOL is switched off. To do so, press the UP and DOWN keys at the same time (see page 11): Firmware version (here: 1.00)

  • Page 53: Vibtool Accessories

    VIBTOOL accessories The following pages describe a selection of the available VIBTOOL accessories: Spare temperature probe - VIB 8.605 The VIBTOOL temperature probe may be replaced quite simply: 1. Rotate the temperature probe into the measurement position. 2. Insert a 4 mm (1/8") screwdriver between the base of the probe and the VIBTOOL housing (1).

  • Page 54: External Or Permanently Installed Sensors

    Appendix External or permanently installed sensors Connection to one external sensor VIBTOOL can be connected to external sensors using cable VIB 4.704-2 (QLA-TNC plugs, 2m). In situations where a single Tandem-Piezo accelerometer (e.g. VIB 6.122R) has been permanently installed on a machine, simply connect your VIBTOOL directly and take the reading.
  • Page 55 Appendix PC cable - VIB 8.619 This cable connects VIBTOOL to the 9-pin RS232C serial interface of the PC for firmware update. Length 2 m / 6' 6". Serial interface...

  • Page 56: Countersink Bit - Vib 8.610

    The countersink produces a hole smaller than the VIBTOOL vibration and shock pulse sensor. A ring-shaped contact area is, therefore, created between the sensor and the measurement surface, providing the best transmission of signal.

  • Page 57: Vibtool Delivery Package

    VIBTOOL delivery package The delivery package contains the parts listed below. If you discover that a part is missing or is damaged, please contact your PRÜFTECHNIK agent immediately. VIB 2.760 EU: VIBTOOL delivery package, EC VIB 2.700 EX VIB 2.720 VIB 2.729 VIB 9.497...

  • Page 58: Technical Data

    Appendix Technical data Measurement Vibration velocity Sensor built in; external Tandem-Piezo ® sensor available Meas. quantity Frequency range 2/10Hz – 1/10kHz Measurement range 0 - 50 mm/s RMS max. value depends on sensor type and signal frequency Accuracy ± 5% (DIN 45662) Vibration acceleration Sensor built in;...
  • Page 59 CE conformity...
  • Page 60 PRÜFTECHNIK AG Oskar-Messter-Straße 19-21 85737 Ismaning, Germany www.pruftechnik.com Tel.: +49 (0) 89-99616-0 Fax: +49 (0) 89-99616-300 eMail: info@pruftechnik.com Printed in Germany VIB 9.497.02.09.0G VIBTOOL ® and TandemPiezo ® are registered trademarks of PRÜFTECHNIK AG. Contents subject to change without further notice, particularly in the interest of further technical development.

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