MMF VM100 User manual

Instruction Manual
Manfred Weber
Metra Mess- und Frequenztechnik in Radebeul e.K.
Meissner Str. 58 - D- 1445 Radebeul
Tel. [phone] Fax [phone]
Email: [email protected] Internet: www.MMF.de
Vibration
Analyzer
VM100
Valid from Version 1. 1

Published by:
Manfred Weber
Metra Mess- und Frequenztechnik in Radebeul e.K.
Meißner Str. 58
D-0 445 Radebeul
Tel. [phone]
Fax [phone]
Email [e-mail]
Internet www.MMF.de
Note: The latest version of this manual can be found at:
http://www.mmf.de/product_literature.htm
Specifications subject to change.
© 2022 Manfred Weber Metra Mess- und Frequenztechnik in Radebeul e.K.
Full or partial reproduction subject to prior written approval.
Apr/ 23

Contents
. Purpose.................................................................................................................3
2. Properties..............................................................................................................3
3. Operation..............................................................................................................4
3. . Connectors and Controls...............................................................................4
3.2. Switching On / Off and Reset........................................................................5
3.3. Menu Bar......................................................................................................5
3.4. Sensors..........................................................................................................6
3.5. USB Connection...........................................................................................7
3.6. Charging the Accumulator............................................................................7
3.7. SD Card and File System..............................................................................8
4. Measurement Modules..........................................................................................9
4. . Licenses........................................................................................................9
4.2. Module Amplitude/Time............................................................................. 0
4.3. Module Frequency Analysis (FFT)............................................................. 4
4.4. Module Amplitude/Rotation Speed.............................................................2
4.5. Module Machine Vibration.........................................................................24
4.5. . Introduction.........................................................................................24
4.5.2. Measurement Routes............................................................................25
4.5.3. Creating Measurement Points in a Route.............................................26
4.5.4. Trend Monitoring of Vibration Severity..............................................29
4.5.5. Roller Bearing Monitoring Using Overall Values................................32
4.6. Module Envelope Analysis.........................................................................34
4.6. . Introduction.........................................................................................34
4.6.2. Measurement........................................................................................34
4.7. Module Balancing.......................................................................................39
4.7. . Introduction.........................................................................................39
4.7.2. Measurement........................................................................................4
4.8. Module Third Octave Analysis (VC and Nano Criteria).............................56
4.8. . Introduction.........................................................................................56
4.8.2. Sensors for VC and Nano Criteria........................................................58
4.8.3. Measurement........................................................................................59
4.9. Module Hand-Arm Vibration......................................................................63
4.9. . Introduction.........................................................................................63
4.9.2. Hand-Arm Sensors...............................................................................66
4.9.3. Measurement........................................................................................67
4. 0. Module Whole-Body Vibration................................................................70
4. 0. . Introduction.......................................................................................70
4. 0.2. Whole-Body Sensors.........................................................................72
4. 0.3. Measurement......................................................................................76
4. . Module Whole-Body – 3 Sensors.............................................................80
4. . . Introduction.......................................................................................80
4. .2. Whole-Body Sensors.........................................................................80
4. .3. Measurement......................................................................................8
5. Saving Measurements and NFC Function...........................................................84
5. . Folders and File Names...............................................................................84
5.2. NFC Identification of Measuring Points.....................................................85
5.3. Saving Bitmap Screenshots.........................................................................86
5.4. Saving Data in CSV Format........................................................................87

5.5. Viewing Saved Measurement Data.............................................................87
5.6. Recording Raw Data in WAV Format.........................................................87
6. Presets.................................................................................................................90
7. Other Settings.....................................................................................................9
7. . Display Settings..........................................................................................9
7.2. Date and Time.............................................................................................92
7.3. Language.....................................................................................................92
7.4. Beep Signal.................................................................................................92
7.5. Factory Reset..............................................................................................92
7.6. Device Data.................................................................................................92
8. Firmware Update................................................................................................93
9. Technical Data....................................................................................................96
Appendix: Warranty
CE Declaration of Conformity
2

Thank you for choosing a vibration meter from Metra.
1. Purpose
The VM 00 vibration analyzer is suitable for many tasks of vibration measurement
tasks, such as:
•General measurements of overall values in time domain with recording
•Frequency analysis (FFT)
•Amplitude/RPM measurement
•Machine vibration monitoring
•Roller bearing analysis
•Balancing
•Third-octave analysis of extremely low vibration using “VC” and “Nano” criteria
•Hand-arm vibration to ISO 5349 with one or two hands
•Whole-body vibration (triaxial) to ISO 263 with health and comfort evaluation,
vibration on passenger and merchant ships to ISO 6954
•Whole-body vibration with three triaxial sensors for the evaluation of passenger
comfort in vehicles
2. Properties
The VM 00 can measure on up to nine channels simultaneously. It works with all
commercially available IEPE accelerometers. TEDS sensors are recognized. In addi-
tion, a photoelectric reflex switch can be connected for speed measurement.
The instrument is available in two versions:
•VM 00A with 9 inputs and internal infrared temperature sensor
•VM 00B with 3 inputs
The instrument is fully touch-operated making it simple and intuitive. The remov-
able micro SD card serves for storing measured values. A USB interface is used for
data transfer. Measurement data is stored in CSV format. This allows common
spreadsheet programs to be used for further processing on a PC.
3

3. Operation
3.1. Connectors and Controls
On the upper side of the case you will find a small keypad with the power button,
the reset button and a function key. The VM 00A also has an infrared temperature
sensor here. (Figures and 2). The charge LED lights up red when connected to a
USB charger or PC.
The USB port (Type C) for charging and transferring
data as well as the micro-SD card are also located behind
a flap on the upper side.
On the lower side you will find three sensor sockets for
the VM 00A and one for the VM 00B. Each of the four-
pole sensor sockets is suitable for connecting a triaxial
sensor (X/Y/Z). Figure 3 shows a view of the connectors
from outside. The assignment is:
: Ground
2: Channel X
3: Channel Y
4: Channel Z
The VM 00 has standard IEPE inputs.
A triaxial sensor requires three inputs. All triaxial accelerometers from Metra can
be connected via their standard cables.
Alternatively three single-axis sensors can be connected to each input socket. Metra
offers for this purpose an optional adapter cable with three female BNC connectors.
Here you will find also the tacho input (Figure 4) for a photoelectric reflex switch as
RPM sensor which has the following assignment:
: +26 V
2: Digital input D
3: Digital input D2
4: +5 V
5: Analog input A
5: Analog input A2
7: Ground
The inputs D2, A and A2 are currently not used.
4
Figure : Keypad of VM 00A Figure 2: Keypad of VM 00B
1
2 3
4
Figure 3: Sensor input
1
2
4
35
6
7
Figure 4: Tacho input

Behind a cover is another USB port, which is only for firmware updates.
3.2. Switchin On / Off and Reset
The VM 00 is switched on by briefly pressing the red key on the side keypad (Fig-
ures and 2). It always starts with the last selected settings and is immediately
ready for use in measuring mode. If the battery is completely discharged, it may be
necessary to connect a charger to start it.
To switch off, touch the on/off symbol at the top left of the screen.
When a battery charger or USB cable is connected the unit is started by a screen
button.
Should the instrument not start normally, you may perform a factory reset by hold-
ing the F button and pressing shortly RESET or by holding F while pressing .
The unit can be restarted from any program point by pressing the Reset key. Any
entries made previously are retained.
3.3. Menu Bar
All function modules use a uniform menu bar at the top of the screen (Figure5).
The menu bar contains the following components:
•Off button
•Function menu: Touch the menu text to open a drop-down menu with all func-
tion modules. Unlicensed functions are grayed out. Touching a menu item selects
the function. If no selection is made, the menu closes again after a few seconds.
•The info button provides a short help text to each measuring module.
•The menu button opens a menu structure with various settings and for USB
data transfer (see section 7).
•The save button opens the menu for saving data to SD card (Section 5). If no
SD card is inserted, the symbol appears crossed out.
•The menu bar shows the date and time. In the VM 00A, you can see the mea-
sured temperature of the built-in infrared sensor below it (Figure ).
•The battery indicator shows the current charge status of the unit. In case
of advanced discharge, the display bar turns yellow and in case of critical charge
state, it turns red. When the charger is connected, the charging symbol is
displayed alternating with the actual charge current. After charging is complete, a
plug symbol for battery support appears on the right (see section 3.6).
5
Figure 5: Menu bar

3.4. Sensors
The sensor menu (Figure 6) opens by selecting the Sensors item in the main menu.
It shows the sensitivities of the connected sensors. As in the entire user interface of
the VM 00, three input channels (X/Y/Z) are displayed for each input socket (" " to
"3" for VM 00A or " " for VM 00B). For inputs without a sensor, "No sensor" ap-
pears.
The VM 00 supports TEDS sensors. TEDS stands for "Transducer Electronic Data
Sheet" and is standardized according to IEEE 45 .4. The most important technical
data is stored digitally in the sensor and can be read out automatically by the mea-
suring instrument. Measurement errors due to confusion or incorrect entries are thus
eliminated. The standard data arrangement for accelerometers according to "Tem-
plate 25" is supported. If a TEDS transducer is detected, the sensor menu shows its
sensitivity, type designation and serial number. In Figure 6 this is shown for a
TEDS triaxial sensor at socket . The sensitivity of TEDS sensors cannot be edited
in the menu.
For conventional IEPE sensors, touching the sensitivity opens a numeric input pad
for entering the sensitivity. The unit of measurement can be changed to mV/Pa for
pressure transducers and measuring microphones or mV/N for force transducers.
The units of measurement Pascal or Newton are then displayed instead of accelera-
tion in some operating modes.
The speed sensor can be deactivated if it is not required. It then no longer appears in
the measured value display. With the button sensor detection can be repeated.
6
Figure 6: Sensor menu

3.5. USB Connection
On the upper side, you will find the USB port behind a flap (Figure 0). It is a USB-
C connector. It is used to charge the battery and transfer data. To transfer the files
stored on the SD card, connect the VM 00 to a PC via a USB cable. To activate
data transfer, select USB connection in the main menu (Figure 7). You will then see
the display corresponding to Figure 7.
The VM 00 is now in USB mass storage mode. It does not need a device driver and
behaves like a USB stick by providing the file system of the SD card.
For sensitive measurements, the USB cable should be disconnected.
3.6. Char in the Accumulator
The built-in nickel-metal hydride rechargeable battery is
charged via the USB-C socket (Figure 0). A USB mains
adapter is used for charging, which should deliver at
least 3 A from 5 V. Otherwise, the full charging current
may not be provided and the charge time is extended.
If a USB supply is connected, the red charging LED
lights up (Figures and 2).
If the USB supply is connected when the VM 00 is
switched off, the charge screen opens (Figure 9). It will
be dimmed after a short time. You can check whether the
device is still charging by touching the screen.
When switched on, the status bar on the top right shows
the charging symbol alternating with the actual
charge current flowing into the battery. Depending on
the connected USB interface or charger the input current
may be in the range from 0.5 to 2.5 A. About 0.7 A of this current are needed for
the instrument itself. Standard USB 2.0 sockets provide only 0.5 A which means
that there may be no current left for charging the battery and instead it may be fur -
ther discharged.
When charging is complete, the battery and plug icon appears .
At advanced discharge, the indicator bar turns yellow and in case of critical charge
state, it turns red.
Reducing the display brightness (see section 7. ) may considerably increase the
battery operating time.
7
Figure 7: Main menu
Figure 8: USB connection
Figure 9: Charge screen

For sensitive measurements, the charger should be disconnected.
3.7. SD Card and File System
The SD card serves as a measurement data memory. It is located behind the flap
next to the USB socket (Figure 0). The VM 00 uses the FAT file system. The
files can be transferred to a PC via a USB cable as shown in section 3.5. If neces-
sary, the SD card can be removed after unlocking it by pressing slightly on its edge.
You can read out the data in other devices. Insert the SD card into the VM 00 with
the contacts facing up. It is recommended only to use memory cards of size 2 GB.
For more details on measured value storage, refer to section 5.
➔It is strongly recommended to make regular backups of the data stored on the
SD card.
➔Saving additional files to the SD card or creating additional folders using other
devices is not advisable.
8
Figure 0: Charge connector and SD card slot