PCE Instruments PCE-VM 40C Users guide

PCE-VM 40C

PCE Americas Inc.
711 Commerce Way
Suite 8
Jupiter
FL-33458
USA
From outside US: +1
Tel: [phone]
Fax: [phone]
[e-mail]

www.pce-instruments.com/english

www.pce-instruments.com

PCE Instruments UK Ltd.

Southpoint Business Park

Hampshire / Southampton

United Kingdom, SO31 4RF

[e-mail]

Units 12/13

Ensign way

From outside UK: +44

Tel: [phone]

Fax: [phone]

Contents

1. Purpose of Use.........................................................................................................................2

2. Function...................................................................................................................................2

3. Measuring................................................................................................................................3

3.1. Selecting the Measuring Mode.......................................................................................3

3.2. Measuring in accordance with DIN 4150-3....................................................................4

3.2.1. Measurement Procedure..........................................................................................4

3.2.2. Measuring with the PCE-VM 40C.........................................................................6

3.3. Measuring in accordance with BS7385..........................................................................8

3.3.1. Measurement Procedure..........................................................................................8

3.3.2. Measuring with the PCE-VM 40C.........................................................................9

3.4. Measuring in accordance with SN 640312a.................................................................10

3.4.1. Measurement Procedure........................................................................................10

3.4.2. Measuring with the PCE-VM 40C.......................................................................10

3.5. Measurement in accordance with Circulaire 23/07/86.................................................12

3.5.1. Measurement Procedure........................................................................................12

3.5.2. Measuring with the PCE-VM 40C.......................................................................12

3.6. Non-Standardized Measuring........................................................................................13

3.7. Overload Indication.......................................................................................................14

4. Saving Measurement Values.................................................................................................14

4.1. Introduction...................................................................................................................14

4.2. Settings for Recording Data..........................................................................................15

4.3. Viewing saved Data.......................................................................................................17

4.4. Deleting the Data Memory............................................................................................18

4.5. Alarm Statistics.............................................................................................................18

4.6. Transferring the recorded data to a PC.........................................................................19

5. Printing a Report...................................................................................................................19

6. Relay Output and Alarm Beacon PCE-VM40-L....................................................................21

7. Receiving Alerts via SMS (PCE-VM40-MODEM)...............................................................22

7.1. General Information......................................................................................................22

7.2. Inserting the SIM Card..................................................................................................23

7.3. Connecting to a Mobile Phone Network.......................................................................23

7.4. SMS Alerts....................................................................................................................24

7.5. Polling the Alarm Status by Calling.............................................................................26

7.6. Phone Book...................................................................................................................27

7.7. Writing an SMS.............................................................................................................27

7.8. Close connection with mobile phone network.............................................................28

8. Miscellaneous Settings..........................................................................................................28

8.1. Warning Threshold........................................................................................................28

8.2. Keypad Lock.................................................................................................................29

8.3. Adjusting the Axes........................................................................................................29

8.4. Date and Time...............................................................................................................30

8.5. Instrument Name...........................................................................................................31

8.6. Menu Language.............................................................................................................31

9. Data Transfer.........................................................................................................................32

9.1. Connection to a PC........................................................................................................32

9.2. Software PCE-VM40MDB............................................................................................32

10. Firmware Update.................................................................................................................38

11. Charging the Accumulator..................................................................................................39

12. External Power Supply........................................................................................................40

13. Reset....................................................................................................................................40

14. Mounting / Installation........................................................................................................41

15. Calibration...........................................................................................................................42

16. Technical Data.....................................................................................................................43

1

Thank you for choosing a Metra Vibration Measurement Instrument

1. Purpose of Use

The PCE-VM 40C is designed for measuring vibration in buildings, bridges, towers, pipe­lines and various other large structures.

The measurements serve to prevent possible structural damage or disturbance to
people.

The PCE-VM 40C contains a sensor, recording and evaluation electronics and an accumu­lator in its robust casing. It is especially suitable for autonomous operation over
longer periods of time e.g. on construction sites.

2. Function

The instrument contains three highly sensitive piezoelectric systems for vibration
measurement of all three spacial dimensions.

The signal processing is controlled by a micro processor. The PCE-VM 40C is operated
via its seven keypad buttons and illuminated LCD display.

The measurement data can be transferred to a PC via the USB interface. The instru­ment also has a port for connecting a charger and a relay output for the external sig ­naling of vibration occurrences.

The PCE-VM 40C can measure in accordance with to the following standards:

• DIN 4150-3: Structural Vibration – Effects of vibration on structures

• BS 7385: Evaluation and measurement for vibration in buildings

• SN 640312a: Effects of vibrations on buildings

• Circulaire du 23/07/86 relative vibrations mécaniques émises dans l'environ -

nement par les installations classées pour la protection de l'environnement

Through menu navigation, all information concerning the type and location of the
measurement and the building type is requested and operational errors are avoided.

The display of the measurement values is carried out using the three peak values of
vibration velocity (X/Y/Z) or the vector sum. Furthermore the main frequency and
its coordinate are displayed for the highest amplitude.

Additionally the PCE-VM 40C displays the FFT spectrum of the measured vibration
quantity. The spectral graph also indicates the limit value curve of the chosen stan­dard, which enables you to analyze potential damage at a glance.

If the limit value is exceeded, the measured value can be saved. The PCE-VM 40C also
contains two LEDs and a relay output for signaling alarm status.

The PCE-VM 40C with the optional accessory PCE-VM40-MODEM has the option of
sending SMS alert messages, if a limit value is exceeded.

Other accessories are the mobile report printer PCE-VM40-PRINTER and the alarm bea ­con PCE-VM40-L.

2

3. Measuring

3.1. Selecting the Measuring Mode

Switch on the 3&(VM40C by pressing the ON-OFF button. After the start screen, the
measurement value display with the most recently selected settings appears.

Press F3 to open the main window and select ''measuring mode'' (Figure 1).

Figure 1: Measuring mode

You can choose between adjustable measured value (non-standardized) and the four
supported standards, which are described in the following sections.

In the measurement value display you can view the selected settings by pressing the
F1 button (Figure 2).

Figure 2: Settings display

Here you will see your chosen standard with its specified settings as well as the four
frequency and amplitude dots of the limit value curve.

Notice: The following chapters include abstracts of the most relevant standards for
building vibration. For a compliant evaluation it is necessary to study the standard
documents to the full extent.

Notice: Menus are closed automatically if no operation is done for 1 minute and the
3&(VM40C returns to the measuring screen.

3

3.2. Measuring in accordance with DIN 4150-3

3.2.1. Measurement Procedure

DIN 4150-3 is the most widely applied standard internationally for measuring struc­tural vibrations. The measurement procedure can be found in a similar form in other
national standards, for example the Italian UNI 9916.

The assessment parameter is the maximum value vi of the three individual compo­nents (peak values) of vibration velocity at frequencies of 1 to 80 Hz . The measure­ments are carried out at the foundation. Vibrations in the ceiling of the upper most
outer walls also provide valuable information for analysis. These detect the horizon­tal response of the building to the vibration at the foundation. Only the greatest
value of both the horizontal components is then used for the analysis.

The standard provides guide values for permissible vibration velocities for short­time and sustained vibrations in three types of buildings.

Guide values for vibration velocity v

i

for analyzing the effects of transient vibration

Building Type Foundation

Frequency of the Significant Vibration

Upper ceiling

Frequency range 1 – 10 Hz 10 – 50 Hz 50 – 100 Hz all Frequencies

Direction X / Y / Z X / Y / Z X / Y / Z X / Y Z

Reinforced or
framed struc­tures.

Industrial and
heavy commer­cial buildings

20 mm/s

20 – 40

mm/s

40 – 50

mm/s

40 mm/s 20 mm/s

Unreinforced or
light framed
structures/ Resi­dential or light
commercial type
buildings

5 mm/s 5 – 15 mm/s

15 – 20

mm/s

15 mm/s 20 mm/s

Delicate, listed
buildings e.g.
historical monu­ments

3 mm/s 3 – 8 mm/s

8 – 10

mm/s

8 mm/s 20 mm/s

Table 1: Guide values for transient vibration

Notes from DIN 4150-3 about the guide values in Table 1:

4

• For engineering structures in massive scale construction, e.g. reinforced concrete

for abutments or block foundations you can raise the guide values for industrial
type buildings twofold.

• If short-time vibrations occur in ceilings at below 20 mm/s in vertical direction, a

reduction in the serviceability is not to be expected.

The standard also gives guide values for short-time vibrations on pipelines of vary­ing types:

Guide values for transient vibrations in pipelines

Pipe material Vibration Velocity vi

Steel, welded 100 mm/s

Stoneware, concrete, reinforced con­crete, pre-stressed concrete, metal

80 mm/s

Brickwork, plastic 50 mm/s

Table 2: Guide values for pipelines

For continuous vibrations the following guide values apply:

Guide values for vibration velocity vi
for analyzing the effects of continuous vibration

Building Type Upper ceiling level, all Frequencies

Direction X / Y (horizontal) Z (vertical)

Reinforced or framed structures industrial
and heavy commercial buildings

10 mm/s 10 mm/s

Unreinforced or light framed structures, res­idential or light commercial type buildings

5 mm/s 10 mm/s

Delicate buildings, listed buildings e.g. his­torical monuments

2.5 mm/s -

Table 3: Guide values for continuous vibration

Vertical continuous vibrations with a vibration velocity below 10 mm/s normally do
not cause damage to ceilings in houses. For delicate buildings there are no guide
values available.

For sustained vibrations on pipelines, the guide values for short time vibrations, re ­duced by 50%, can be applied.

5

The following advice is given in DIN 4150-3 for the placement of sensors:

• For foundation vibrations the transducer should be placed on the lowest floor at

the foundation or on the outer wall.

• In the upper ceiling level the sensor should be placed inside or very close to the

outer wall.

• For buildings without a basement the measurement location must not be higher

than 0.5m above the ground level.

• The measurement location should predominantly be on the side of the building

facing the excitation.

• One of the lateral coordinates (X / Y) should be parallel to an outside edge of the

building.

• Buildings with larger ground areas should be measured at several points.

• In addition to measuring at the foundation and the upper ceiling, if required,

measurements can be carried out in the vertical direction on the ceilings, where
the strongest vibrations are to be expected (mostly central).

• When measuring pipelines, where possible, the sensor should be placed on the

pipeline itself

3.2.2. Measuring with the 3&(VM40C

After choosing the operating mode „DIN 4150-3“, please select whether you will be
measuring short-time or sustained vibrations (Figure 3).

Figure 3: Short-time/Sustained vibra­tion

Next, please select the building type:

Figure 4: Building type

6

When selecting “Pipeline” the following types are available:

In the case of short-time vibrations the measurement location needs to be selected:

The standard frequency range is 1 to 80 Hz. In special cases, e.g. blasting opera­tions, the frequency range can be increased to 1 to 315 Hz.

Press F3 to exit the menu to go to the measurement value display (Figure 8).

The three peak values X/Y/Z of the vibration velocity and the highest amplitude to ­gether with its main frequency are displayed every second. On the right side of the
screen a graph displays this value in the frequency range. The diagram is scaled to
the limit curve. Higher magnitudes will be cut off.

7

Figure 5: Pipeline types

Figure 6: Measurement loca­tion

Figure 7: Frequency range

Figure 8: Measurement value display in accordance with DIN 4150-3

Notice: For ceiling vibrations (1 and 3) there are different guide values for the verti-

Guide values for short-time vibrations without excitation of building resonances

Main
Frequency

Vibration Velocity
for Residential Buildings

Vibration Velocity
for Industrial Buildings

1 – 4 Hz < 0.6 mm displacement -

4 Hz 15 mm/s 50 mm/s

15 Hz 20 mm/s 50 mm/s

40 Hz 50 mm/s 50 mm/s

250 Hz 50 mm/s 50 mm/s

Table 4: Guide values in accordance with BS 7385

8

cal (Z) direction. They are evaluated by the 3&(VM40C and considered for alarms. In
the FFT and frequency display, however, only the horizontal directions (X / Y) are
shown.

If the limit value curve is exceeded, “ALARM” is displayed below the main fre­quency. If the limit value is exceeded the following will happen:

• The red light will flash.

• The measurement values will be saved if the event recording has been activated.

• The relay output will switch, if it has been activated.

• A text message (SMS) will be sent, if this option has been set up and if the mo-

dem is connected.

Note: The alarm and recording functions will be activated after a delay of 30 sec ­onds after leaving the menu.

3.3. Measuring in accordance with BS7385

3.3.1. Measurement Procedure

The British Standard BS 7385 is mainly used in the Commonwealth countries. It is
less complex than the DIN Standard. Similarly to the DIN standard, it also measures
the peak value of the vibration velocity in all spacial dimensions. It is called “peak
particle velocity” (ppv). The frequency range is not precisely specified. The
3&(VM40Cuses the range 1 to 80 Hz and 1 to 315 Hz.

The Standard provides guide values for short-time vibrations, which are measured at
the foundation (Table 4). The guide values mark the limit above which cosmetic
damage may occur, such as cracks in the walls or ceilings. Lesser damage is to be
expected at double the guide value and greater damage at fourfold the guide value.
In the case of sustained vibrations or excitation from building resonance the guide
values need to be reduced by by at least 50%.

Residential and Industrial buildings are differentiated.

Figure 9: Graph: Guide values in accordance with BS 7385

1 10 100

0

10

20

30

40

50

60

Residential

Industrial

Hz

ppv [mm/s]

3.3.2. Measuring with the3&( VM40C

Once you have selected the measuring mode “BS7385”, select the building type to
be assessed (Figure 10).

Figure 10: Building Type

In the next menu select the frequency range:

Figure 11: Frequency range

Press F3 to exit the menu and to go the measurement value display (Figure 12).

9

The three peak values X/Y/Z of the vibration velocity and the highest amplitude to ­gether with its main frequency are displayed every second. On the right side of the
screen a graph displays this value in the frequency range. The diagram is scaled to
the limit curve. Higher magnitudes will be cut off.

If the limit value is exceeded, “ALARM” is displayed below the main frequency
and the following will happen:

• The red light will flash.

• The measurement values will be saved if the event recording has been activated.

• The relay output will switch off, if it has been activated.

• A text message (SMS) will be sent, if this option has been set up and if the mo-

dem is connected.

Note: The alarm and recording functions will be activated after a delay of 30 sec ­onds after leaving the menu.

3.4. Measuring in accordance with SN 640312a

3.4.1. Measurement Procedure

The Swiss Standard SN 640312a is also based on the peak values of the vibration
velocity. However, it uses the vector sum as assessment parameter:

vi=√v

x

2

+v

y

2

+v

z

2

Figure 12: Measurement value display to BS7385

It measures between 5 and 150 Hz. The frequency range is divided into three sec ­tions: 8 to 30 Hz, 30 to 60 Hz and > 60 Hz. For frequencies below 8 Hz the guide
value for 8 to 30 Hz reduced by one-third is applied.

As a basis for the guide values, four building types with different levels of sensitiv ­ity, the occurrence of vibrations and the frequency with which the vibration influ­ence occurs are taken as a the basis for the guide values (5).

3.4.2. Measuring with the 3&(VM40C

After selecting the measuring mode “SN 640312a”, define which sensitivity class
the building belongs to:

Table 5: Guide values in accordance with SN 640312a

10

Once you have selected the building type, select the occurrence of the vibrations.
The figures represent the vibration emissions, at which the velocity vector exceeds
the 0,7-fold guide value. The assessment period is the time duration during which
the building is exposed to vibrations.

Press F3 to exit the menu and to go to the measurement value display (Figure 15).

The vector sum of the vibration velocity in the three directions X/Y/Z and the high ­est amplitude together with its main frequency are displayed every second. On the
right side of the screen a graph displays this value in the frequency range. The dia­gram is scaled to the limit curve. Higher magnitudes will be cut off.

If the limit value is exceeded, “ALARM” is displayed below the main frequency
and the following will happen:

• The red light will flash.

• The measurement values will be saved if the event recording has been activated.

• The relay output will switch off, if it has been activated.

• A text message (SMS) will be sent, if this option has been set up and if the mo-

dem is connected.

Note: The alarm and recording functions will be activated after a delay of 30 sec ­onds after leaving the menu.

11

Figure 13: Building Type

Figure 13: Occurrence

Figure 14: Occurrence

Figure 15: Measurement value display in accordance with SN 640312a

3.5. Measurement in accordance with Circulaire 23/07/86

3.5.1. Measurement Procedure

The French guideline specifies a measuring method and limits for building vibra ­tion. It differentiates between methods for “fine analysis” and “monitoring”. The
3&(VM40C supports the second method. Measurement is based on the peak values of
vibration velocity in directions X/Y/Z between 4 and 150 Hz..

Relevant for evaluation is the maximum of the three peak values and its main fre­quency. The guideline gives limit values for resistant, sensitive and very sensitive
structures and for permanent or short-time vibration. The limit values are found in
figures 16 and 17.

Figure 16: Limits for permanent vibration (Circulaire 23/07/86)
Figure 17: Limits for short-time vibration (Circulaire 23/07/86)

3.5.2. Measuring with the 3&(VM40C

After selecting the measuring mode “Circulaire” you will be asked to enter the
building type (resistant, sensitive or very sensitive). In the next step you select per ­manent or short-time vibration. Leave the menu by pressing OK.

The three peak values X/Y/Z of the vibration velocity and the highest amplitude to ­gether with its main frequency are displayed every second. On the right side of the
screen a graph displays this value in the frequency range. The diagram is scaled to
the limit curve. Higher magnitudes will be cut off.

If the limit value is exceeded, “ALARM” is displayed below the main frequency
and the following will happen:

• The red light will flash.

• The measurement values will be saved if the event recording has been activated.

• The relay output will switch off, if it has been activated.

• A text message (SMS) will be sent, if this option has been set up and if the mo-

dem is connected.

Note: The alarm and recording functions will be activated after a delay of 30 sec ­onds after leaving the menu.

12

3.6. Non-Standardized Measuring

If a standardized measurement is not desired, the vibration quantity (acceleration or
velocity), the frequency range and the limit values can be entered manually. For this
option select the measuring mode “Non-standardized”.

Next you can select the vibration quantity and frequency range (Figure 18).

After this the points which define the limit value curve can be entered. The lowest
and highest frequencies are fixed. The amplitudes and the two middle frequencies
can be freely selected within the range limits. (Figure 19).

As with the other measuring modes, your chosen measuring settings can be viewed
during measuring by pressing F1 (Figure 20).

13

Figure 18: Non-standardized measurement

Figure 19: Entering limit values

Figure 20: Display of limit values

3.7. Overload Indication

If the vibration magnitude exceeds the limits shown in the Technical Data section,
the 3&(VM40C will indicate “OVERLOAD” instead of the measuring value for the re ­spective direction. (Figure 21).

In addition the warning and alarm LEDs flash simultaneously.

Due to integration the overload limit for velocity is frequency dependent (Figure

22).

Figure 21: Overload indication

10000

1000

100

mm /s m/s²

10

1

1 10 100 1000

Hz

a

v

Figure 22: Overload limits for acceleration (a) and velocity (v)

4. Saving Measurement Values

4.1. Introduction

The 3&(VM40C has memory space for 100,000 measurements. The saved data can be
viewed via the instrument menu or transferred to the PC via the USB interface.

A measurement record includes:

• Date and time

• Measurement values X/Y/Z or the vector sum

• Main frequency

• Trigger event

The instrument saves the data if any of the following events (triggers) occur:

• a warning or alarm event occurred

14

• a predefined time interval expired

Alarm events occur if the limits described in Section 3 are exceeded.

Warning events occur if the warning threshold is exceeded (see section 8.1).
The 3&(VM40C can also save measurements in fixed time intervals. In this case the

highest X/Y/Z peak values since the last time step are saved1. Thereby no vibration
event will be lost when recording in time intervals. This mode may be used if con ­tinuous recording is desired. It should be noted, however, that large amounts of data
is accumulated withing short time. At 5 s recording interval, for example, the mem ­ory will be full after only 5 days. You should also be aware that it will take longer
to transfer the data to a PC.

For most applications event controlled recording is sufficient. With carefully set
alarm and warning limits all relevant vibration events are stored whereas time sec­tions without vibration are ignored. This avoids the accumulation of useless data
without information value. For verification purposes a combination of event and
time controlled recording (e.g. with 5 minute intervals) may be useful. In any case
the 3&(VM40C ensures continuous monitoring.

Notice: Saving measurements will start 30 seconds after leaving the menu.

Saved measurements are sorted in to data files in the PCE-VM 40C. A file c
ontains related measurements with the same settings.

4.2. Settings for Recording Data

To start recording open the main menu by pressing F3 and select “Recording” (Fig­ure 23).

Figure 23: Start Recording

Select “start”. Now you can define the events (triggers), when the data should be
saved. (Figure 24).

Figure 24: Trigger selection

In the setting “Warning/Alarm” the measurement value is saved as soon as a change
in status occurs, as follows:

1 from version 001.008, in earlier versions the current display value was saved

15

• Normal to Warning

• Normal to Alarm

• Warning to Alarm

• Alarm to Warning

• Alarm to Normal

• Warning to Normal

If the warning or alarm status persists, no further measured values will be saved.
This keeps the quantity of saved data down to a minimum. The type of status
change is saved with the measurement.

The PCE-VM 40C also offers you the possibility of saving measurements at pre-set time
intervals. The time intervals are to be entered in seconds, for a minimum of 5 sec ­onds. (Figure 25).

Figure 25: Recording interval

The time interval recording can also be combined with the status change recording
(“Event and time control”).

After determining the recording settings you will be asked to enter the name of the
data record (Figure 26).

Figure 26: Record name

The record name identifies a block of related measurements with the same saved
settings. Here you can enter, for example, the measurement location. With the arrow
keys you can enter up to 20 upper case characters and digits. The last entered name
appears as the default name. To exit the menu press OK.

Next you will be asked for SMS alarms. You may confirm if the modem is con ­nected (see section 7.4).

After defining all the recording settings you can activate the keypad lock by press­ing OK, to ensure that no unwanted interference occurs (see Section 8.2). You can
also start recording without using the keypad lock by pressing F3 (27).

16

Figure 27: Key lock

The instrument will now display “Recording started”. Thirty seconds later the eval­uation of the recording trigger (event or time interval) will begin. The currently ac­tive recording can be seen in the measurement value display as a blinking text
“Rec.# xxx”, where xxx is the number of the previously saved measurements.

During recording the menu cannot be opened. If you press the menu button F3 you
will be asked whether you wish to stop recording, the same will happen if you press
OK/ON-OFF. The modem will also be switched off to save power.

After reaching the memory end the PCE- VM 40C will display the error message
“Memory full”.

Notice: The transmission of data from the PCE-VM 40C to the PC is not possible
while recording is active.

4.3. Viewing saved Data

After recording you can view the saved measurements in the “Recording” menu. Se­lect the menu point “View/edit/delete files” and then use the arrow keys ▲▼ to se­lect the data file you wish to view (28).

Figure 28: Select file

A data file is displayed by its number and name, together with the start time, chosen
standard and trigger source.

Note: The file numbers are not always in the order of saving. A previously erased
file number will be re-assigned to the next saved file.

Pressing ◄ deletes the file together with all of its recorded measurements.

Press F1 to change the file name.

Press OK to open the file. The first saved record is then displayed ( 29). Below the
file name you see the record number with the total number of records in the file,
date and time and the trigger event. The abbreviations mean:

17

(T): time interval controlled

0→W: normal to warning transition

0→A: normal to alarm transition

W→A: warning to alarm transition

W→0: warning to normal transition

A→W: alarm to warning transition

A→0: alarm to normal transition

END: recording stopped by the user, last record

BAT: recording terminated because of low battery, last record

MEM: recording terminated because of full memory, last record

When the data was measured to SN 640312a you see the vector sum, otherwise the
three measuring values of X / Y / Z. The significant frequency f(max) of the highest
value is also displayed.

Use keys▲▼ to scroll between records. Press F3 to exit the menu.

4.4. Deleting the Data Memory

In the “Recording” menu the entire memory can be deleted by selecting “ Delete all
files”. This can take several seconds, depending on the amount of data stored. The
event counters (see chapter 4.5) are also reset.

4.5. Alarm Statistics

In the measurement value display, press F2 for an overview of the warning and
alarm events that have occurred. These are displayed together with the number of
saved measured values.

18

Figure 29: View record

Figure 30: Event display

The sent SMS counter is only useful in combination with PCE-VM40-

MODEM. Press F1 to reset all counters.

4.6. Transferring the recorded data to a PC

For transferring saved data from the PCE-VM 40C to a PC, a program is available (see section 9.2). It
can found on our website

https://www.pce-instruments.com/english/download-win_4.htm

The program enables you to display the measured data as table or time graph and generates reports according
to your own requirements. It also convert the measure-ment data into a table of comma-separated values
(CSV).

5. Printing a Report

The mobile printer PCE-VM40-PRINTER is offered as an optional accessory. It enables printing an
immediate report on the site of measurement. The small printer uses thermo paper rolls. It is
powered from an internal accumulator. It only needs to be connected to the PCE-VM 40C via the
supplied cable.

Figure 31: Printer PCE-VM40-PRINTER

To print a report, please open the menu “Recording” (Figure 32).

Figure 32: Printer menu

Select “Print report” and press OK. Next you will see the menu for the selection of a data file.
Use the ▲▼ keys and OK to select a file. If the file contains more than 50 records a warning
message will be issued to avoid excessive paper consumption (Figure 33).

19

You can continue printing all records by pressing F3 or filter the data before print -

ing using the ▲▼ keys (Figure 34).

The following options are available:

• Only recordings triggered by the alarm limit

• Recordings triggered by the warning or alarm

limit

• Only the recording with the highest measuring

value

20

Figure 33: Warning at more than 50 records

Figure 34: Selecting data to be printed

Figure 35: Selecting data to be printed

By this moment the printer needs to be connected
and switched on pressing the button for at least
1 s. Press OK at the PCE-VM 40C to start
printing.

Figure 37: Start printing

Each recording fills two lines. The number after
“No.” indicates the position of the record in the
PCE-VM 40C memory. After “Event” you find
the rea-son of recording. “A” stands for
exceeding the

Figure 36: Example printout

alarm limit, “W” for exceeding the warning limit, “N” for dropping below the warn-

Figure 38: Relay output

In addition, you can determine whether the relay should stay energized (“Latching”)
or de-energize after the event finishes, until OK is pressed (“Non-latching”).

Note: The relay function will be activated after a delay of 30 seconds after leaving
the menu.

Figure 39 shows the output socket and its contact assignment. In neutral (de-ener­gized) position the contacts “C” and “n.c.” are connected, during warning or alarm
status (energized) the contacts “C” and “n.o.” are connected.

21

ing limit and “T” for recording in time intervals. In the last record “E” marks termi ­nation by the user, “B” because of battery discharge and “M” because of full mem­ory. The recording event is followed by the time of recording.

The second line shows the measuring values. For triaxial measurement, e.g. to
DIN 4150-3, there are the three axis values X/Y/Z. For vector sums, e.g. to
SN 640312a there is only one value per record. The main frequency is also printed.

Each printout ends with a record “Event: E”. This marks the end of recording.

In Figure 36 you see an example printout showing only alarm events. The header in ­cludes device data, settings and start time. Below you find the recordings.

The printout ends with “END OF REPORT”.

The printer switches off automatically when not used for longer time. The included
battery can be charged by the supplied mains adapter.

6. Relay Output and Alarm Beacon PCE-VM40-L

The PCE-VM 40C has a relay output for controlling external signaling
devices. These can be, for example, warning lights and acoustic signaling devices.

Please pay careful attention to the maximum contact load (see technical data, section

16). The relay output is not suitable for direct connection of mains operated devices.

To adjust the settings open the main menu and select “Alarms” and then “Relay out­put”. You can pre-set the relay to energize or de-energize when warning status (see
Section 8.1) or alarm status occurs. (38).

Figure 39: Relay output terminal assignment (external view of the socket)

Metra offers the alarm beacon PCE-VM40-L as accessory (Figure 40). It is supplied

22

with 5 m connection cable to the VM40 relay output. Two LR20 batteries are
included which last for approximately 180 hours of light. The battery compartment is
opened by unscrewing the bottom lid.

Within the battery compartment there are also two switches. The white one enables
a light sensor which switches off the beacon during day light. Since this will not be
desired in most cases the white switch should be unlatched (off). The black push
button selects the flashing pattern.

The switch outside the beacon is for testing.

Figure 40: Alarm beacon PCE-VM40-L

7. Receiving Alerts via SMS (PCE-VM40-MODEM)

7.1. General Information

The optional mobile phone modem PCE-VM40-MODEM can be connected for
sending SMS text message alerts when vibration events occur. In this way the PCE-
VM 40C can be used far away grid-bound infrastructures.

The modem supports the 4G (LTE) frequency bands 3, 8 and 20 for Europe, Middle
East and Africa and 2G (E-GSM-900 and DCS-1800).

Available is also a modem version with
3G (UMTS bands B1, B2, B5, B6, B8)
and 2G (GSM 850, E-GSM 900, DCS
1800, PCS 1900).

The modem is connected via a 5 m long
cable to the 8 pin socket of the PCE-
VM 40C which helps to find a suitable
location even in places with poor
network cover-age. Power supply for the
modem is pro-vided from the PCE-VM
40C.

To provide the additional power for the
modem (current consumption is about
three times higher than without modem) it
is recommended to connect a USB mains

Figure 41: PCE-VM40-MODEM

plug adapter or a power bank via the “+5 V supply” socket of the modem using the
supplied USB cable (see section 12).

7.2. Inserting the SIM Card

To use the SMS functions a SIM card is needed. Open the case of the modem by
loosening two cross-headed screws (Figure 42). Remove the cover and open the
SIM card holder. Insert a Micro SIM card in the direction printed on the case and
push it in until you hear a clicking sound.

Figure 42: SIM card holder

7.3. Connecting to a Mobile Phone Network

Once you have inserted the SIM card, open “Alarms/SMS” from the main menu and
then select “SMS”.

When you use the card for the first time, you will be asked to enter the PIN. If the
card has been locked (e.g. due to entering the wrong PIN three times), you will ad­ditionally need to enter the PUK number (Personal Unblocking Key) (Figure 43).

23

Figure 43: Entering the PUK and PIN

Note: The PCE-VM 40C deactivates the password request after the first
registration, so that the password does not need to be entered again.

Now the PCE-VM 40C will try to connect to the mobile phone network. This can

Figure 44: Mobile Registration

The antenna symbol and the reception quality display, with five levels in the upper
right corner of the display indicate the connection status. If the reception quality is
too low, a question mark appears next to the antenna symbol. An active connection
is also indicated by the green LED at the modem. Next you will see the SMS set ­tings menu (Figure 45).

24

take more than 1 minute. If the registration is successful the name of the
network provider will appear on the display (Figure 44).

Figure 45: SMS Menu

7.4. SMS Alerts

In recording mode (see section 4), the PCE-VM 40C with connected PCE­VM40-MODEM can send SMS messages including measurement values and the

time when a limit value is exceeded. The necessary settings are made in
the menu “Recording” / “Start recording” / “SMS alarms?” (Figure 46). A
connection to the mobile network will be established automatically if not done
before as shown in section 7.3.

Figure 46: SMS Settings

Under the entry “Max. alerts/day” you can choose the maximum number of text

The number of text SMS messages already sent can be viewed during measurement
operation by pressing F2.

25

messages the PCE-VM 40C can send in one day. This allows you to control the
connec-tion costs.

Under “Time betw. SMS” you can set how many minutes the PCE-VM 40C should
wait before sending another SMS. This information also helps to avoid unnecessary
costs or disturbances.

Furthermore, one or two telephone numbers need to be entered, to which the SMS
messages should be sent. The numbers are selected from the phone book which is
saved on the SIM Card (see Section 7.6).

Thirty seconds after starting the recording mode the SMS alert function will be acti­vated. During measurement operation this is indicated by an “S” displayed in the
top left corner next to the antenna symbol. (47).

Figure 47: SMS Function display

Figure 48: Number of messages

sent
The message will be displayed on the receivers mobile (varying slightly dependent
on the receiving phone) as shown in Figure 49.

Under the heading “!!VIBRATION ALERT!!” the instrument name is displayed
(see Section 8.5). Below this the date and time of the alarm event are displayed, fol­lowed by the three vibration values measured at the time of the alarm signal. Lastly
the main frequency and the remaining accumulator power of the PCE-VM 40C are
shown.

A similar message including “!!LOW BATTERY ALERT!!”, date and time is
shown at 5 % battery charge. At full memory a warning message “!!MEMORY
ALERT!!” is sent.

26

Figure 49: Example of received SMS message

7.5. Polling the Alarm Status by Calling

For remote access the PCE-VM 40C can be called via its mobile phone number. The
in-strument will terminate the call after the first ring tone without establishing a con­nection, i.e. there will be no connection fee for the caller. Some providers will play a
“temporary unavailable” message which you can ignore by hanging up. Shortly
after you will receive an SMS message with the number of occurred alarms, the
maximum X/Y/Z values with main frequency, date and time since the last reset of the
alarm statistics (see section 4.5) and the current battery condition (Figure 50).

Please note that the PCE-VM 40C only reacts on caller numbers which are stored
in the phone book of its SIM card.

Figure 50: SMS polling example

If the PCE-VM 40C is connected to the mobile network (see section 7.3)
but not in recording / monitoring mode it will answer with an SMS message
showing the max-imum values and the text “NOT RECORDING!” (Figure 51).

Figure 51: SMS polling without recording

7.6. Phone Book

Press F1 to create a new entry. First enter the telephone number without spaces and
then the name. Press OK to save the entry.

With the keys ▲▼ you can scroll through the existing entries.

Press◄ to delete an entry.

Press ► to edit an existing entry.

The phone book can store a maximum number of 50 entries.

7.7. Writing an SMS

In the menu “Write SMS” under “Alarm/SMS”, sub-menu “SMS” you can write
and send a short text message. You will then need to enter the receivers telephone
number or select it from the phone book (Figure 53).

Figure 53: Enter receivers number or select from phone book.

27

The phone book is saved to the SIM card. If you have already contacts saved to the
inserted SIM card, these will also appear in the PCE-VM 40C. New contacts can be
added to the phone book by the PCE-VM 40C.

The phone book is found in the main menu under “Alarms/SMS”, sub-menu “SMS”
and from there under “Phone book” (Figure 52). To edit the phone book you need
to be connected to the network.

Figure 52: Phone Book

Next you can enter 4 rows of text, each up to a maximum of 20 characters long. At
the end of each row press OK. After entering the fourth row the message will be
sent. (Figure 54).

7.8. Close connection with mobile phone network

In the sub-menu “SMS” you will find the option “close connection”. Press OK to
confirm you want close the connection with the mobile phone network (Figure 55).
To prolong the life of the accumulator we recommend closing the connection with
the mobile network when it is not being used. Keeping it connected runs dow n the
accumulator more quickly.

8. Miscellaneous Settings

8.1. Warning Threshold

The warning threshold is an adjustable percentage value, which relates to the Alarm
threshold of the selected standard (see Section 3). This enables you to automatically
save measurement values or activate signaling at below the alarm limit of the ap­plied standard.

If the warning threshold is exceeded the yellow light next to the display will flash.

To adjust the warning threshold, open the main menu by pressing F3, then select
“Alarm/SMS” and “Warning Threshold (Figure 56).

28

Figure 54: Write a short message

Figure 55: Close connection

By pressing the keys ▲▼ you can set the value between 10 and 95 % .

8.2. Keypad Lock

To prevent manipulation during ongoing monitoring, it can be advantageous to acti­vate the key lock. This function can be found in the main menu under “Key Lock”
(Figure 57).

29

Figure 56: Warning Threshold

Figure 57: Key Lock

When the key lock has been activated, after leaving the menu you can only retrieve
information using keys F1 and F2.

To release the key lock press all four arrow keys simultaneously, until the instru­ment displays “unlocked”.

Alternatively, the key lock can be switched on and off by a command sent via the
USB interface.

8.3. Adjusting the Axes

The PCE-VM 40C contains a tilt sensor for adjusting and monitoring the vertical
align-ment. The axes adjustment is located in the main menu under “Device
settings”. There you will see a graph which resembles a spirit level (Figure 58). The
moving point has to be located within the circle. If this is the case, “OK” will be
displayed on the left of the screen.

To install/mount the PCE-VM 40C on various floors or surfaces in conformity
with a standard, Metra offers a tripod floor plate with adjustable feet.

The axis adjustment is monitored during measurement operation. If the axes have
been adjusted incorrectly, the flashing warning will appear in place of the standard
“Adjust Axes!” (Figure 59).

8.4. Date and Time

To retrace vibration events in the saved values the exact date and time are impor­tant. To set the data and time open the main menu, by pressing F3. From the main
menu go to the menu option “Device settings” and press OK. From within this sub­menu go to “Date and time”.

Use the keys ▲▼ to change the flashing value and with the keys ◄► move be­tween second, hour, minute, month, day and year.

The date also takes the leap year in to account.

In the same menu you can also correct clock inaccuracy. This can be done using the
setting at “Cal.” in ppm (parts per million). The clock frequency can be increased
with positive values and decreased with negative values. The sign changes to minus
at +254 ppm.

Example: The clock is 5 seconds slow. There are 24 * 60 * 60 s = 86400 seconds in
a day. The difference amounts to 5 s / 86400 s = 58 * 10-6 = 58 ppm. The adjustable
value is -58 ppm. Press OK to apply the settings.

30

Figure 58: Axis adjustment

Figure 59: Warning "Adjust axes"

Figure 60: Date and Time

8.5. Instrument Name

Using the arrow keys you can enter us to 20 upper case characters and digits.

8.6. Menu Language

In the “Device settings” menu under “Menu language” you can choose between
German and English.

31

The PCE-VM 40C can be given an individual name, which, for example, identifies
the lo-cation of installation. The instrument name is retrievable via the USB interface
and is also used for the SMS alerts (PCE-VM40-MODEM) (see Section 7.4).

To enter the name open the main menu, go to “Device settings” and then to “Device
name”.

Figure 61: Device Name

9. Data Transfer

32

9.1. Connection to a PC

The PCE-VM 40C has a USB interface. For connecting to a PC the VM2x-USB
cable is provided (Figure 74), which is connected to the second socket on the PCE-
VM 40C. As soon as the other end of the cable is connected to the computer USB
socket, the de -vice identification begins.

If the instrument is being connected to a PC for the first time you will be asked to
carry out a driver installation. The required driver data MMF_VCP.zip can be found
on our website:

https://www.pce-instruments.com/english/download-win_4.htm

Save both data files in a directory on your computer.

When Windows requests details of the source of the device driver, this directory
should be entered.

The device driver is digitally signed and runs with Windows 7, 8 and 10.

If the PCE-VM 40C is connected to a PC, the signal “USB” appears on the
measurement screen in place of the battery symbol. The battery power is then
switched off and the instrument obtains its power supply via the USB connection.

9.2. Software PCE-VM40MDB

The PC software PCE-VM40MDB is used to archive and display measuring data
from the PCE-VM 40C. In addition it generates reports in accordance with the
relevant stan-dards.

You can download the license-free software from the web page

https://www.pce-instruments.com/english/download-win_4.htm

PCE-VM40MDB runs under Windows 7, 8 and 10.

Connect the PCE-VM 40C to the USB port of the PC, switch it on and install the
device driver, if necessary (see chapter 9.1).

Install PCE-VM40MDB and start it from the Windows start menu (Programs /
Metra Radebeul). The main window will appear. (Figure 62).

Note: On 64 bit systems it may be necessary to install manually “SQL Server Com­pact” which can be found under this link:

https://www.microsoft.com/en-us/download/details.aspx?id=5783

Click “Load selected data” to start the transfer. This may take up to some minutes
for larger amounts of data. The progress is indicated above the list of header data.

33

Figure 62: Main window without data

To start the transfer of data from the PCE-VM 40C to the PC click “Load
data from VM40”. The software will read header data first. Now you can select the
files to be loaded by clicking the checkboxes (Figure 63).

Notice: The transmission of data from the PCE-VM 40C to the PC is not possible
while recording is active.

Figure 63: Selection of files

34

Figure 64: Imported data

PCE-VM40MDB can archive all measurements you have ever recorded with the
PCE-VM 40C. They can also come from different PCE-VM 40C units.

search in larger amounts of data there are filter functions on the right side of the

To
header list. You may search for a certain range of calendar dates, parts of the file
name or the “place” text or for the measurement mode. The wild-card character “*”
is allowed.

Select a record with the mouse pointer and click “Show”. A window showing
“Properties” of the opened file will appear (Figure 65).

Figure 65: File properties

You find the following information:

• Record name which was entered in the PCE-VM 40C (see page 16)

• Period of recording

• Device name and serial number

• Used standard with detailed settings

• Record settings (triggers and interval)

• Number of saved measurements, warnings and alarms (colored)

• Maximum values for X, Y and Z

You may manually enter a description of the place of measurement, measuring con­ditions, etc. Two text fields are available for this purpose.

Click “Open protocol” to generate a report to DIN 4150-3, Appendix A. Under sev­eral menu tabs the necessary information is gathered (Figure 66). These include:

• Purchaser and person in charge

• Details about the source of vibration

• Description of the monitored structure

• Information about the location and the measuring point

• Environmental and other conditions

• Measuring results to be included

In the menu “Location and position” pictures can
be entered. Click inside the white space and load
the image file from a specified storage position.

Press “OK” to complete the report. Figure 68
shows an example report.

The letter head of the protocol, including company
address data and a logo, are entered in the menu
“File” / “Settings” of the main window (Figure

67).

35

Figure 66: Entering data for the measuring report

Figure 67: Protocol letter head

36

Figure 68: Example report (4 pages)

Apart from the report function you may display the measuring data graphically by
selecting the menu tab “Measurement chart” (Figure 69). You will see all measure­ments in a magnitude/time diagram. Displayed events can be filtered depending on
their trigger event. For example, you may want to see alarm events only. By right
mouse click axes can be disabled. You may also save the diagram as image or in
CSV table format to be further processed in Excel, OpenOffice Calc etc.

Select the menu tab “Measurements” to switch to table view (Figure 70). Like in the
diagram window you have the possibility to suppress certain kinds of events.

Notice: The frequency column shows “???” instead of a main frequency if the mag­nitude was too low to detect a main frequency.

37

Figure 69: Measuring chart

Figure 70: Table view

If you click “Export” in the main window you will be asked to select the events to
be saved into an export file (Figure 62). Available export formats are text and CSV.

38

Figure 71: Selecting data for export

Finally, you may use the “Delete” button to erase data files from the PCE-VM 40C
mem-ory.

10. Firmware Update

The device software (firmware) can be updated via the USB interface. First check
whether an updated version of the currently installed software is available. This can
be found on our website under:

https://www.pce-instruments.com/english/download-win_4.htm

There you will see the most recently updated firmware version. The version number
is composed of three digits for the hardware and three for the software (hhh.sss).
Only the last three digits are relevant for the Firmware.

The currently installed version is displayed on the PCE-VM 40C start screen.

If firmware with a higher version number is available on the website, please proceed
as follows:

1. Download the firmware file vm40.hex from the above named internet address.

2. Also download the program “Firmware Updater” from the above named internet

address and install it on your PC.

3. Connect the PCE-VM 40C to the PC using the supplied USB cable and switch

it on, by doing this the PC recognizes it as a USB device.

Figure 72: Firmware Updater

4. Start the “Firmware Updater”, then select the instrument type “VM40” and the

virtual COM port assigned by the PC. If you are not sure which of the available
COM ports is correct, you can check in the Windows system control manager
located within the device manager.

5. Click on “Load” in the “Firmware Updater” and enter the path to the file where

the downloaded firmware file vm40.hex is located.

6. Within the PCE-VM 40C “Device settings” select the option “Update firmware”

and confirm the subsequent warning by pressing OK (Figure 73). By carrying
out

this step the old Firmware is deleted. The PCE-VM 40C will then indicate

7. Click on “Send” in the “Firmware Updater” and confirm the subsequent hint.

39

that it is awaiting new Firmware data from the USB interface (“Waiting for
update”).

Figure 73: Start update

Transfer of the firmware data has now begun. The transfer progress is displayed
as a time bar on the PC and also on the PCE-VM 40C. When the update is
finished the PCE-VM 40C will carry out a new start and the “Firmware Updater”
will close. Please do not interrupt the update process. After transfer failures
the update can be restarted at point 3.

Important: Before starting an update please ensure that the battery is sufficiently
charged. Otherwise the update may fail and can only be restored by the manufac­turer.

11. Charging the Accumulator

The built-in NiMH accumulator has a capacity of 9 A h, which enables the PCE-VM
40C to operate independently for more than10 days. The usage of the mobile phone

mo-dem will triple the current consumption and consequently shorten the operation
time by two thirds.

NiMH accumulators have a self-discharge rate of 0,5 to 1 % per day.

The charge status is displayed in the top left corner of the display. Shortly after the
battery symbol displays empty, the PCE-VM 40C switches off. The device measures
ac-cording to the specification until it reaches this state.

To recharge the accumulator please connect the charger provided to the device via
the charge socket.

After connecting up the charger you need to switch the device on in order to start
the charging process. After a few seconds “Chg” appears in the top left corner of the
screen in place of the battery symbol. The accumulator has started charging, only
when the “Chg” indicator appears and only while measurements are being dis­played. If you open a menu or switch off the device the charging process will be in­terrupted.

If the accumulator is completely empty it takes approximately 10 hours to be fully
recharged. You can continue measurement while the accumulator is being charged.

12. External Power Supply

Pressing the Rest button does not affect data in the memory. Only time and date
need to be readjusted (chapter 8.4).

40

For measurements of long duration an external power supply is recommendable.

To operate the PCE-VM 40C using an external power supply, connect the USB
cable pro-vided via the device USB socket. (Figure 74).

To operate the device via a USB power supply you may use a standard USB power
supply unit or alternatively a “USB Power Bank” accumulator. If the PCE-VM
40C is connected via USB, the text “USB” appears on the measurement screen in
place of the battery symbol. The internal accumulator then switches off and the PCE-
VM 40C re-ceives its power via the USB connection.

If the modem is connected the VM40 can be powered externally via the modem
connector (see section 7.1).

Notice: The battery charger VM40-CH is not intended for permanent operation of the
PCE-VM 40C. Measurement can be continued with connected charger. However,
each time the charge current is switched on or off the PCE-VM 40C may detect false
alarms.

Figure 74: USB Socket, USB Charger, Power Bank (e.g. 15 Ah) and USB Cable

13. Reset

In rare cases the PCE-VM 40C may not respond to key pressure. You can
restart the firmware by pressing the internal reset button. For this purpose the case
needs to be opened by unscrewing the four screws of plastic covers and then further
four screws which are under the gray plastic parts. Please open the lid carefully.

Figure 75: Reset button

14. Mounting / Installation

41

The cast aluminum casing of the PCE-VM 40C is suitable for direct
mounting because of its weight. However, we recommend using the Tripod Floor
Plate PCE-PCE-VM40-BP, avail-able from Metra as a mounting accessory.
(Figure 76). The PCE-VM40-BP has ad-justable feet for aligning the
axes, including exchangeable tips for different floor types.

At higher magnitudes the PCE-VM 40C should be attached by screws. According to
SN 640312a, free placement is not allowed at accelerations above 3 m/s². The
corre-sponding velocity is, for example, 24 mm/s at 20 Hz or 12 mm/s at 40 Hz.

For screw attachment the PCE-VM 40C has four through-holes for screws up to M5
with a maximum head diameter of 8 mm. It is not necessary to open the casing in
order to mount the device. Only the two gray plastic panels need to be removed.

Figure 76: PCE-VM 40C with Tripod Floor Plate PCE-VM40-BP

Figure 77 shows a dimensional drawing of the mounting holes.

42

Figure 77: Dimensions of the mounting holes

15. Calibration

A PCE-VM 40C distinguishing feature of the PCE-VM 40C is its high long-term
stability. De-pending on the intensity with which it is used we recommend a
recalibration after approximately 1 to 2 years. The month and year of the last
calibration are displayed on the start screen.

The calibration is performed through mechanical excitation with known vibration
amplitudes.

Due to the weight of the device and the required low frequencies and high ampli­tudes a particular kind of vibration exciter is needed.

The calibration menu is not accessible to the user in order to avoid manipulation

Metra offers a calibration service. For calibrations in other labs we also provide the
necessary technical documentation, upon request.

16. Technical Data

Measured value Peak value of vibration velocity or vibration acceleration

Supported standards DIN 4150-3; BS 7385; SN 640312a, Circulaire du 23/07/86

Vibration Sensor Triaxial piezoelectric shear type accelerometer

Display ranges (peak)
Vibration acceleration:
Vibration velocity:

0.001 – 15 m/s²

0.01 – 2400 mm/s at 1 Hz; 0.01 – 30 mm/s at 80 Hz
(full-scale value frequency dependent)

Measurement accuracy ±3 % ±20 digits at reference frequency 16 Hz, 100 Hz low

pass
±3 % ±40 digits at reference frequency 16 Hz, 395 Hz low pass

0.8- 100 Hz; 0.8 – 395 Hz, 5 – 150 Hz

LCD, b/w, 128 x 64 pixels, back light
3 peak values (X/Y/Z) or vector sum
significant frequency
50 lines FFT spectrum
battery charge condition; date; time

Warning and Alarm LEDs next to the Display
Relay output (change-over contact, max. 100 VDC / 2 A)

SMS transmission at vibration events
including X/Y/Z values, frequency, date, time, device name

Built-in Micro SD card
max. 100 000 measurements (X/Y/Z, frequency, date, time,
trigger event)

Analog/digital converter 24 Bit, Sigma-Delta

USB interface

Accumulator

Battery operating life
per charge

Menu language

Operating temperature
range

Protection grade

Dimensions

Weight

Accessories included

Optional Accessories

* A 2G/3G modem is available

43

Frequency ranges

Display

Alarm signaling

SMS alarm function
(with PCE-VM40-
MODEM)

Measurement value
memory

USB 2.0 Full-Speed, CDC mode, via cable VM2x-USB

NiMH, 4.8 V / 9 Ah, charging duration: approx. 10 h;
buffered operation without accumulator load by USB power;
(e.g. USB mains adapter or USB power bank)

5 – 15 days, depending on temperature, mobile
communica-tion (PCE-VM40-MODEM) and display
light duration

English / German / Italian / French

- 20 – 60 °C

IP67

150 mm x 140 mm x 80mm

2 kg

USB Cable VM40 USB
Battery charger VM40-CH

Tripod Floor Plate PCE-VM40-BP
2G/4G (GSM/LTE) modem PCE-VM40-MODEM*
Portable battery-powered printer PCE-VM40-PRINTER