MMF VM23 Instruction Manual
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MMF VM23 Instruction Manual

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Instruction Manual
Vibration Meter
VM23
Valid from firmware ver. xxx.007
Manfred Weber
Metra Mess- und Frequenztechnik in Radebeul e.K.
Meissner Str. 58 - D-01445 Radebeul
Tel. +49-351 836 2191 Fax +49-351 836 2940
Email:
Info@MMF.de
Internet:
www.MMF.de

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  • Page 1 Instruction Manual Vibration Meter VM23 Valid from firmware ver. xxx.007 Manfred Weber Metra Mess- und Frequenztechnik in Radebeul e.K. Meissner Str. 58 - D-01445 Radebeul Tel. +49-351 836 2191 Fax +49-351 836 2940 Email: Info@MMF.de Internet: www.MMF.de...
  • Page 2 Manfred Weber Metra Mess- und Frequenztechnik in Radebeul e.K. Meißner Str. 58 D-01445 Radebeul Tel. +49-351-836 2191 +49-351-836 2940 Email Info@MMF.de Internet www.MMF.de Note: The latest version of this manual can be found at http://www.mmf.de/prod- uct_literature.htm Specification subject to change.

  • Page 3: Table Of Contents

    5.3.2. Mounting the VMID Measurement Point..........11 6. Measurement......................12 6.1. Measurement Value Display................12 6.2. Measurement Point Detection..............12 6.2.1. Reading the VMID Data with the VM23..........12 6.2.2. Entering the Measurement Point Text..........13 6.2.3. Deleting Measurement Point Data............14 6.3. Saving Measurands..................14 7. Viewing Saved Measurement Data..............15 7.1.
  • Page 4 Figure 1: VM23 with sensor...

  • Page 5: Purpose

    In the development of the VM23 value was placed on simple operation and mainte- nance requirements, which enable trained personnel to operate the instrument with- out the need of being specially qualified.

  • Page 6: The Measuring Instrument

    ISO 2954. In the ISO 2954 a band filter for the vibration velocity of 10 to 1000 Hz is de- fined. The VM23 has additional frequency ranges from 2 to 100 Hz and 2 to 1000 Hz. The corresponding frequency response graphs can be viewed in Figure 3.
  • Page 7 Figure 3: Frequency Response for vibration velocity For machines with the purpose of generating vibration, like vibration conveyors, vi- brating screens and separators the VM23 can display the main vibration frequency. At such machines the magnitude is usually measured as displacement.

  • Page 8: The Batteries

    4. The Batteries 4.1. Inserting the Batteries The VM23 is supplied by three alkaline standard cell type AAA (LR03) batteries. NiMH batteries (HR03) may also be used. The minimum energy requirement of the VM23 enables maximum utilization of the batteries.

  • Page 9: Switching On And Off

    Chapter 4.4). 4.3. Battery Display and Battery Type In the upper left corner of the VM23 display there is a battery level indicator (Fig- ure 7). When the green battery symbol is full, the battery is fully charged. Figure 8: Select battery type...

  • Page 10: Shut-Off Timer

    If the VM23 is connected to a USB port, it will be supplied by the USB voltage in order to spare the batteries. In this case, “External” is displayed on the screen in - stead of the battery level indicator.

  • Page 11: Preparation Of Measuring Points

    5. Preparation of Measuring Points 5.1. General Information on Measurement Point Choice When monitoring machines it is important to take measurements under the same op- erating conditions, at the same measurement point. Choosing the suitable measure- ment point is therefore decisive. Where possible, qualified staff experienced in machine monitoring should be called upon.
  • Page 12 Figure 13: Measuring points on electric motors Figure 12: Measuring points on machines with vertical rotors...

  • Page 13: Vmid Measurement Point

    5.3. VMID Measurement Point 5.3.1. How the VMID Measurement Point Functions The VM23 is equipped with an electronic measuring point detector. Metra offers a type measurement point called VMID, which is made of magnetic stainless steel and has an inbuilt memory with an individual serial number (Figure 14).

  • Page 14: Measurement

    To improve the vibration transmis- sion the measuring point can be lightly lubricated. Figure 16: Newly recognized VMID When the Sensor base comes into contact with the measurement point for the first time, the VM23 displays the VMID measurement point number (Figure 16).

  • Page 15: Entering The Measurement Point Text

    OK again. After entering the ID text you can set filtering and integration and choose between RMS and peak-peak detection. Once you have assigned the VMID serial number a text, the VM23 will display the text continually upon identification of the measurement point. (Figure 18).

  • Page 16: Deleting Measurement Point Data

    In the same way, the entire measurement point data can be deleted as a whole by se - lecting “Erase all Point IDs” in the “ID Menu”. The VM23 memory can store data for a maximum of 1600 measurement points. Note: Deleting measurement point data effects the display of saved measurements.

  • Page 17: Viewing Saved Measurement Data

    To deliver the service staff on site a report about the periodic changes in vibration severity and consequently the previous history of the measurement point concerned, the VM23 provides a graphical trend display. The prerequisite for retrieving graphi- cal trends is placing the sensor on the relevant VMID. The trend display is obtained by pressing the F2 key.

  • Page 18: Viewing Saved Measurement Values

    With F1 you can scroll to the next measurand. The currently displayed measurands can be deleted by pressing OK. Press F2 to exit the menu. The VM23 memory can hold 16000 measurement values. Figure 21: Viewing Saved Measurement Values 7.3. Deleting all Measurement Data Select in the sub-menu “Measurement data memory”...
  • Page 19 45 mm/s 28 mm/s 18 mm/s 14.7 mm/s Zone 11.2 mm/s 4.5 – 14.7 9.3 mm/s mm/s Zone 7.1 mm/s 1.8 – 9.3 4.5 mm/s mm/s Zone 2.8 mm/s 0.71 – 4.5 1.8 mm/s mm/s 1.12 mm/s 0.71 mm/s 0.45 mm/s 0.28 mm/s Risk of machine damage Restricted continued operation...
  • Page 20 In part 3 of the ISO 10816, revised in 2009, the zone borders for the vibration ve- locity of machines with a power of 15 kW to 50 MW are specified (2). Large machines with 300 Medium sized machines kW to 50 MW with 15 to 300 kW Machine type Electric motors with a...

  • Page 21: Setting The Date And Time

    Part 7 of the ISO 10816 deals specifically with rotodynamic pumps (3). Category 1 Category 2 Pumps with high Pumps for general Type safety and reliability and less critical use demands Performance < 200 kW > 200 kW < 200 kW >...

  • Page 22: Calibration

    To exit the menu press OK followed by F2 repeatedly. 10. Calibration The VM23 comes with with a factory calibration, which is traceable to the reference standard of the Physikalisch-Technischen Bundesanstalt (PTB). The calibration is only valid with the supplied vibration transducer. The serial number of the instru - ment and the transducer are stated on the calibration certificate.
  • Page 23 VC20 and VC21 (Figure 24). They can generate one or more vibration ampli- tudes and frequencies with defined accuracy. For the calibration of the VM23 a suf- ficient acceleration would be 10 m/s² at 159.2 Hz (radian frequency 1000 s Figure 24: Vibration Calibrator VC20 To calibrate the instrument, open the “Calibration”...

  • Page 24: Sensor Check

    ERROR” instead of the measurand. 12. Reset Key If it occurs that the VM23 does not respond to the press of any button, press the re- set key to restart the instrument. The reset key is reached with a thin object through the aperture next to the type label (Figure 27).

  • Page 25: Connection To A Pc

    The VM23 has a USB interface. For connection to a PC the supplied VM2x-USB cable can be used (Figure 28), which is connected to the 8 pin socket on the VM23. Please switch the instrument off before connecting it to the PC.
  • Page 26 2. Also download the program “Firmware Updater” from the above named inter- net address and install it on your PC. 3. Connect the VM23 to the PC using the USB cable and switch it on so that Win- dows detects it as USB device.
  • Page 27 The transfer progress is displayed as a time bar on the PC and also on the VM23. When the update is finished the VM23 will start up and the “Firmware Updater” will close. Please do not interrupt the update process. Fol- lowing transfer failures the update can be restarted at point 3.

  • Page 28: Technical Data

    14. Technical Data Displayed measurand true RMS of vibration velocity true peak-peak of vibration velocity equivalent peak-peak of vibration velocity true RMS of vibration displacement true peak-peak of vibration displacement equivalent peak-peak of vibration displacement Measuring range 0.1 – 1000 mm/s for specified measurement accuracy 0.01 –...
  • Page 29 Coding 16 digit unique hexadecimal number Measuring point ID mem- 1600 measuring points with serial number and text ory (VM23) Mounting the VMID Mount with two part adhesive, e.g. LOCTITE Hysol 3430 or 3450 Maximum temperature 80 °C...

  • Page 30: Declaration Of Ce Conformity

    The repaired or replaced product will be sent back at Metra’s expense. Declaration of Conformity According to EMC Directive 2014/30/EC Product: Vibration Meter Type: VM23 (from Ser. no. 160000) It is hereby certified that the above mentioned product complies with the demands pursuant to the following standards: DIN EN 61326-1: 2013...

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