IMV CORPORATION VM-4424S User manual

INSTRUCTION MANUAL
Portable Vibrometer: VM-4424S/H
IMV CORPORATION
Document Number TVE-6-3791
I s s u a n c e D a t e April 9, 2012
V e r s i o n 1.0.3
Pages (Incl. Cover) 35

Revision History
Date Rev Details
Mar 03, 2012 1.0.0 New Issue
Mar 22, 2012 1.0.1 Corrected Figures and phrases.
Added optional accessories.
Apr 09, 2012 1.0.2 Added Preparation(3-1)
Added Definitions(10), including H-func
August 07, 2012
1.0.3 Added Title for BRG and H-func

目 次
1. Introduction .................................................................................................................................1
1-1. Panel Description ..................................................................................................................2
1-2. Package Contents..................................................................................................................3
2. Outline .........................................................................................................................................4
2-1. SmartVibro ............................................................................................................................4
2-2 Features .................................................................................................................................4
3. Measurement ...............................................................................................................................5
3.1 Before Getting Started............................................................................................................6
3-2. Measurement Screen.............................................................................................................7
3-3. Operations during Measurement ...........................................................................................8
4. Setting........................................................................................................................................10
4-1. Mode Setting .......................................................................................................................11
4-2. Calculation Setting ..............................................................................................................12
4-3. Filter....................................................................................................................................14
4-4. Auto Range..........................................................................................................................15
4-5. Coupling of the H-Function .................................................................................................15
4-6. Sensitivity Setting of AC and DC Output .............................................................................16
4-7. Digital Volume .....................................................................................................................18
4-8. Battery Setting ....................................................................................................................18
4-9. Auto Power OFF ..................................................................................................................19
4-10. Contrast.............................................................................................................................19
4-11. Language Setting ..............................................................................................................19
4-12. Version Information...........................................................................................................20
4-13. Battery Indicator ...............................................................................................................21
5. The High-End Model; VM-4424H................................................................................................22
5-1. FFT ......................................................................................................................................22
5-1-1. FFT Indication ..............................................................................................................22
5-1-2. FFT Setting ...................................................................................................................23
5-2 Waveform Save ....................................................................................................................24
5-2-1. Waveform Data Save ....................................................................................................24
5-2-2. Data Save Settings .......................................................................................................27
6. Specifications.............................................................................................................................28
6-1. SmartVibro ..........................................................................................................................28
6-2. Pickup..................................................................................................................................28
7. Troubleshooting .......................................................................................................................29
8. Precautions ................................................................................................................................29
9. How to Fix the Pickup and Frequency........................................................................................30
10. Definitions................................................................................................................................31

1
1. Introduction
We truly appreciate your purchase.
Please read this manual carefully before use and follow the cautions below for your safety.
Should you have any inquiries or find a problem during use, please consult our sales office near you or IMV
quality assurance department.
1. If the subject of the measurement could be hot, rotating, or near the movable
parts, assure the safety and fix the pickup for measurement.
Do NOT hold the pickup manually in these cases to avoid any possible accidents;
including burning yourself, and entangled cables.
2. Follow the instructions printed on the battery for replacement and disposal of used
batteries. Pay attention to the polarity of the battery for installation.
CAUTION

2
1-1. Panel Description
VM-4424 is available in Standard Model or High-End Model. Icons appeared on the display are different
in each model. High-end model has these two icons, , when the machine is turned on.
Standard Model
Japanese English
High-End Model
Japanese English
In this manual, panel displays of the standard model, VM-4424S, will be used to explain basic operation in
Chapter 3. Additional functions of the high-end model, VM-4424H, will follow in Chapter 5.

3
1-2. Package Contents
Product and Accessories for the VM-4424S/H
(1) Standard Product and Accessories
Products Qty Model Note Figure
Main Unit
SmartVibro 1 VM-4424S/H
Pickup 1 VP-4416 Piezoelectric Type
Probe 1 －
Handheld probe (with a
nut).
Φ6mm x 195mm
Output Cable 1 －
1.5m cable with a plug at
one end.
For output to a stroboscope
or recorder, etc.
Battery 2 － AA Alkaline batteries
Instruction Manual
1 － With inspection report
Accessories
SD Card 1 － VM-4424H only
(2) Optional Accessories
Products Qty Note Figure
１
Long Pickup Cable
CE-3004-3 (3m)
CE-3004-6 (6m)
CE-3004-10 (10m)
To keep a distance from
the subject of
measurement.
（Example）
２
Magnet MH-201R To fix the pickup on the
subject of measurement.
３
Cover PC-3024 Silicone jacket
４
AC Adapter PS-3024-S AC100-240V
５
Carrying Case C-3024 To store the SmartVibro
and pickup.
Specifications and appearances of the items above are subject to change without notice.

4
2. Outline
2-1. SmartVibro
SmartVibro is an acceleration meter placing emphasis on analysis, which is equipped with functions of
H-function measurement, i.e., envelope processing. This machine serves various uses in measurement
including checking the machines and equipment from various points of view. With SmartVibro, you can not
only analyze the bearing, but also measure the acceleration amount and check fluctuation components in
low-speed rotating machinery bearings.
2-2 Features
■Analysis Capability
RMS value of acceleration and H-function measurement enables precise data gathering that benefits
your decision-making process.
■Simultaneous Measurement
High-speed processing CPU enabled simultaneous display of acceleration, velocity and displacement of
velocity signal coming from the sensor.
■LCD Screen
Various settings like measurement conditions are possible by a touch panel.
■FFT Analysis Function (VM-4424H Only)
Real-time FFT analysis is possible with a minimum condition setting to check vibration frequency
components.
■Waveform Data Save (VM-4424H Only)
Waveform can be stored.
Stored data in the SD card can be exported to a personal computer.
■Language
SmartVibro can be operated in Japanese or English by changing the setting.
■Volume Control
Volume is controllable with the digital volume.

5
3. Measurement
Fig.1
DC OUT:
DC output of measurement data.。
LCD Panel:
Touch panel display.
Function Button
(R)
:
Displays the setting screen, range screen
during measurement, etc.
Function
Button
(L)
:
Starts/Stops measurement.
SD Card Slot:
Waveform data storage.
(Only with VM-4424H)
Power
Connector:
AC adopter is available. (Optional)
Backlight Switch
Power
Pickup Connector
AC OUT:
AC output of measurement data.

6
3.1 Before Getting Started
(1) You can select the computing method for velocity, acceleration, and displacement. Refer to the
Chapter 4-2 for more details. Initial settings are as follows:
■Acceleration : rms
■Velocity : rms
■Displacement : EQP (Equivalent Peak)
(2) Check the polarity carefully, and set two (2) AA batteries in the battery box. (NiCd or Alkaline)
For the use with the AC adaptor, connect the AC adapter cable to the power connector in the
bottom of the device.
(3) Connect the pickup cable to the pickup connector.
Refer to the following chapters for measurement.
The pickup needs to touch the subject for measurement.
★For the method to fix the pickup, refer to the page 25.
(4) Language Setting
You can select Japanese or English to be displayed on the screen. Refer to the Chapter 4-9 for
details.
Power Connector
+
+

7
3-2. Measurement Screen
Turn on the SmartVibro by sliding an orange switch on the left side of the device. Initial screen (Fig
2) will appear.
You can operate the device by using the touch screen and two function buttons.
Japanese English
Fig 2 Initial Screen
(1) Standard Measurement Mode
VM-4424S is equipped with this mode only.
(2) Measurement Range Bar
This shows the level of measurement data. The data is not absolute, but rough indication.
(3) Function Indicator
Valid functions are indicated. In the Fig 2, “Start” and “Setting” are operative.
(4) Battery Indicator
This appears when the battery level is low.
(5) Function Button (L)
In the measurement mode, you can start or hold measurement when you press this button. In the
setting mode, you can check the battery level. (Chapter 4)
(6) Function Button (R)
In the measurement mode, range display will appear when you press this button. In the FFT mode
(available only with the VM-4424H), this button would switch the display from detailed to simple
indication of the result, and vice versa. (Chapter 5) As for the range setting, refer to the Chapter 4.
(4)
(6)
(1)
(2)
(3)
(5)

8
3-3. Operations during Measurement
When the device is not measuring, “Start” is shown in the function indicator on the screen. (Fig 2)
Pressing the function button L would start measurement. The screen displays measurement status.
(Fig 3)
Once you press the same function button or touch the “Hold” on the touch screen would hold
measurement and display the result at that point.
Japanese English
Fig 3 Display during Measurement
How to Change the Range
When the Auto Range function is OFF (as described in Chapter 4), the range key will be activated
during measurement. (Fig 3) Touching “Range” on the touch screen or pressing the function button
R will show the range setting display. You may adjust the range accordingly.
The icon, , will appear on the upper right corner of the screen when the value is over the range.
(Fig 4)
How to Zoom In
Touch the range bar area on the screen to zoom in the image. To zoom out, touch the same area
again. (Fig 5)
Touch here
to
zoom in.

9
Japanese English
Fig 4 Display during Changing the Range
Japanese English
Fig 5 Enlarged
Touch here
to
zoom out.

10
4. Setting
As shown in the Fig 6, the setting screen will appear when you press the function button R when “setting”
is indicated in the function indicator. (Fig 7)
Japanese English
Fig 6 “Setting” in the Function Indicator
Japanese English
Fig 7 Mode and Calculation Setting Screen

11
4-1. Mode Setting
When “Vel.” Is selected for the Mode (Fig 7), the physical amount is shown at the top of the
measurement screen. Also, the enlarged screen will show the physical amount accordingly.
Japanese English
Fig 8 Mode Setting
As you touch the button by “Mode,” the mode will change in the following order:
Acc., Disp., BRG, Hfunc,and Vel.
Refer below for explanation of BRG and Hfunc.
・BRG
BRG is the bearing mode. In this mode, the measurement is processed with fixing the filter in the
range of 1kHz to 10kHz. With the VM-4416 model, the range in this mode was classified as A to E
in abstract number. However, with the VM-4424 model, the range is expressed in acceleration that
is the original physical amount. BRG also has 6 ranges, same as the acceleration. Unlike regular
measurement, [BRG] is displayed on the top side of screen, and only acceleration is displayed on
the measurement screen. (Velocity or displacement will not be displayed).
・H-Function
Through envelope process of the vibration signal, filtering 2kHz – 15kHz, H-function covers the
range which BRG mode is not covering directly. H-function also has 6 ranges, same as the
acceleration. Unlike regular measurement, [Hfunc] is displayed on the top side of screen, and only
acceleration is displayed on the measurement screen. (Velocity or displacement will not be
displayed). Corresponding to the switch from AC to DC, and vise versa, to be described in the
Chapter 4-5, the output will change as follows( see next page). AC output terminal always outputs
fluctuation data only.

12
(1) AC
This is equivalent to “ENV” with the VM-4416. In this setting, the device rectifies only
fluctuation of the H-function (envelope waveform), display the result, and conducts DC
output. H-function is suitable to measure the relatively high components of 2kHz–15kHz
generated from the source of vibration generation of low frequency below 1kHz, and an
inaudible row signal is transformed to an audible signal by converting it into the signal below
1kHz.
(2) DC
Rectifying signal components through 2kHz to 15kHz, this mode outputs its level and
fluctuating component below 1kHz. This is very definition of H-Function.
4-2. Calculation Setting
You can set how to indicate the physical amount of measurement results in calculation setting. As
you touch “Set” in the Fig 7, the Fig 9 will appear.
Japanese English
Fig 9 Calculation Setting
The calculation method selected in the Fig 9 will be displayed on the screen.

13
Japanese English
Fig 10 Example of the Setting Screen
The calculation method also will be changed as you touch the button on the screen in the following
order:
Velocity: “rms” “EQP” “Peak”
Acceleration: “rms” “EQP” “Peak”
Displacement: “EQP” “Peak”
Below is a brief description of each calculation method.
rms: Root mean square. This is the square root of the mean of the squares of the time-series
data gathered from measurement.
EQP: EQP is a value gained by “rms” times root 2 (√2).
Peak: The maximum value of the time-series data.
[Note] Refer to the Chapter 11 for more detailed definitions.

14
4-3. Filter
You can change the settings of high-pass (HPF) and low-pass filters (LPF).
Pressing “Set” would bring you to the screen indicated in Fig 11. By touching the triangles on the screen,
you can change the frequency of each filter.
Japanese English
Fig 11 Example of the Filter Setting
The range of the filter setting is as follows:
・HPF: 5Hz – 999Hz
・LPF: 100Hz – 10kHz

15
4-4. Auto Range
In the setting section, the menu will be switched in the following order as you touch any icon:
→ →
Japanese English
Fig 12 Auto Range Setting Page
Auto Range ON: Range will be adjusted automatically during measurement. “Range” will not be
indicated on the measurement display, namely in this case the function button R is not effective.
You can switch between ON and OFF by touching the Auto Range button on the screen.
4-5. Coupling of the H-Function
You can select the coupling of H-function from AC or DC. Pressing “DC” button by “H-func Couple” in
the Figure 12 will switch “AC” and “DC” alternately. Although AC output terminal always outputs
fluctuation components (Refer to the Chapter 4-1).

16
4-6. Sensitivity Setting of AC and DC Output
Fig 13 will appear as this icon is selected.
Japanese English
Fig 13 AC and DC Output Sensitivity Setting Page
This function set the full-scale value to the AC Output Voltage(1V). Display in the Figure 14 will appear
once you press “Set.”
You can set the level of velocity, acceleration, and displacement per 1V. In the Figure 14, each level is set
as follows:
Velocity: 1V is equivalent to 1500mm/s.
Acceleration: 1V is equivalent to 450m/s2.
Displacement: 1V is equivalent to 75μm.
The physical amount of output signal of AC OUT is equivalent to the physical amount designated in
the mode setting. You can select the value by pressing the button. The value will be switched as follows:
Velocity: 1500 → 150 → 15 → 15000
Acceleration: 45 → 4.5 → 450
Displacement: 75 → 7.5 → 0.75 → 0.075

17
Japanese English
Fig 14 AC Output Sensitivity Setting Page
This function set the full-scale value to the DC Output Voltage(1V).Display in the Fig 15 will appear
once you press “Set.”
Japanese English
Fig 15 DC Output Sensitivity Setting Page
Setting method is the same as the AC sensitivity setting. You can set the sensitivity as follows:
Velocity: 1500 → 150 → 15 → 15000
Acceleration: 45 → 4.5 → 450
Displacement: 15 → 1.5 → 0.15 → 150