CESVA CV211 User manual

User’s manual
CV211
Vibration Calibrator
M_CV211_v0004_20170113_EN

MANUAL DEL USUARIO
USER’S MANUAL
BENUTZERHANDBUCH
MANUEL D'INSTRUCTIONS
MANUALE D’USO
MANUAL DE L’USUARI

CV211
User’s manual
1
ENGLISH
CONTENTS
1. GENERAL DESCRIPTION................................................................................................ 2
2. PARTS AND CONTROLS................................................................................................. 3
3. RECEPTION OF THE VIBRATION CALIBRATOR........................................................... 5
4. USE OF THE KEYBOARD................................................................................................ 5
5. SCREEN........................................................................................................................... 5
6. OPERATION..................................................................................................................... 6
6.1 Verification process..................................................................................................... 6
6.1.1 Verification of VC431 vibrometer....................................................................... 8
6.1.2 Verification of SC310 with module VM310........................................................10
6.2 Battery.......................................................................................................................11
6.2.1 Battery maintenance ........................................................................................11
7. SETTINGS.......................................................................................................................12
8. TECHNICAL SPECIFICATIONS......................................................................................13
8.1 Technical specifications.............................................................................................13
8.2 Included accessories .................................................................................................15

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1. GENERAL DESCRIPTION
The CV211 calibrator for vibration is a precision and a user friendly instrument
that allows you to verify vibrometers quickly and efficiently.
The crystal-quartz of the CV211 vibration calibrator generates stable and accurate
frequencies vibrations of the calibrator. A reference accelerometer inside the shaker head
and a control circuit keep the vibration level constant and independent of the weight of the
fixed accelerometer.
The CV211 allows calibrating accelerometers generating 5 magnitudes of vibration: 1 m/s2, 2
m/s2, 5 m/s2, 10 m/s2 and 20 m/s2 (RMS). And has 7 vibration frequencies: 15.915 Hz, 40
Hz, 80 Hz, 159.15 Hz, 320 Hz, 640 Hz and 1280 Hz. (See combinations available in 8.1).
The CV211 vibration calibrator has rubber pads in order to insulate it from vibrations
transmitted through the contact surface.
The internal battery of the CV211 vibration calibrator makes it suitable for verifying
accelerometers on the measurement site.
The transport briefcase supplied together with the CV211 allows its easy and comfortable
transportation.

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User’s manual
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2. PARTS AND CONTROLS
1. Shaker head. Head for fixing accelerometers.
2. Screen of calibrator.
3. Keyboard of calibrator.
4. Rubber legs. Rubber legs for insulating the CV211 from vibration.
5. Reset button. Button to reset the computer.
6. DC power input. Input for connecting the 15 VDC mains plug adapter.
7. Equipment characteristics. Space reserved for computer characteristics. It details the
make, model, voltage and serial number from it.
8. WEEE Mark. Symbol indicating separate collection for electrical and electronic equipment.
9. CE mark. European approval mark.
Top view

4
Front / Side view
Base

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User’s manual
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3. RECEPTION OF THE VIBRATION CALIBRATOR
When receiving the vibration calibrator check that has the following material:
The CV211 vibration calibrator
Transport briefcase
Fastening adapter set
Power adapter
This user’s manual
4. USE OF THE KEYBOARD
BUTTONS:
OK
ON-OFF
Button for switching on and switching off the calibrator,
and for checking the selected values
Button for accessing to the setup menu
Button for exiting to the setup menu
a+
Button for increasing the vibration magnitude
a-
Button for reducing the vibration magnitude
f+
Button for increasing the frequency of vibration
f-
Button for reducing the frequency of vibration
5. SCREEN
battery indicator margin of error
frequency of vibration vibration
magnitude

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6. OPERATION
Before beginning the verification process be sure that the accelerometer is correctly fixed to
the shaker’s head. To ensure this you can use some stud bolt adapters with different metrics
supplied together with the calibrator. Magnetic and adhesive fixing is allowable only for
estimate calibrations. Accuracy is guaranteed only for screw fixing.
It is very important mounting the accelerometer with symmetrical distribution from the main
axis of the calibrator, otherwise the vibrating system may be deflected from its main axis.
6.1 Verification process
If you already have the triaxial vibrometer VC431 of or the module for
measurement of vibration of the SC310 spectrum analyser then follow the next
steps:
1. Start up the calibrator: press the "ON/OFF" button until the calibrator display lights up. The
screen displays the following information: software and hardware version.
Note: In the unlikely event that the "ON/OFF" does not work, you must press the reset button. This
is on the underside, near the keyboard. Press carefully with a thin object and no-metallic. The
action of pressing the reset button does not affect the accuracy of the calibrator.
2. Then the calibrator shows the next screen where you must check the status of the battery
by means the battery indication located in the upper left part of the screen. In the upper right
part shows the percentage of the margin of error of the vibration magnitude. After a short
period of time, this percentage should reach the value 0%. If the absolute error over 3%, the
calibrator generates an acoustic beep indicating that it is no possible to perform the
calibration process.
3. Wait for a few seconds until the vibration signal stabilises, and the display show the
vibration magnitude and frequency generated by the calibrator at that moment.

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If you wish to modify one of the values press buttons “f-“ and “f+”, to select the 7 available
frequencies, or buttons “a-“ and “a+” if you wish to modify vibration magnitude. The latter
parameter will depend on the frequency chosen, since the 5 vibration magnitudes (RMS
value) on the calibrator are not available for each one of the frequencies. See the following
chart:
Frequency
[Hz]
15.915
40
80
159.15
320
640
1280
Acceleration (RMS)
[m/s2]
1
2
1
2
5
1
2
5
10
1
2
5
10
20
1
2
5
10
20
1
2
5
10
20
1
2
5
10
20
Preferential values in the verification process according to ISO 8041:
Hand-arm: 10 m/s2at 80 Hz and at 159.15 Hz.
Building, Structure and Whole Body: 1 m/s2at 15.915 Hz.
The calibrator supports a weight of 500g of the accelerometer, it depends of frequency of
vibration (see 8.1). If the weight of the accelerometer exceeds the maximum allowed,
appears in the upper right of the screen the message “OVERL”.

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6.1.1 Verification of VC431 vibrometer
a) Place the accelerometer in the head of the CV211. It will suffice to press the
accelerometer against the calibrator head with the hand. Although it is advisable to
connect the accelerometer with a screw or by using a mounting magnet.
b) Take the VC431 to the main menu, and use the arrow buttons to select the sensitivity
adjustment icon and access it with the button.
The vibrometer display will show the level of RMS acceleration measured in each one of the
applications and on each one of its axes. You must know which application and which axis is
being measured at all times.
The tolerance for the reading of nominal acceleration is 5%. This means that for example if
you select an acceleration of 10 m/s2on the calibrator this acceleration value may be
between 9.5 and 10.5 m/s2for correct verification in the direction and application evaluated. If
the reading value is not in this range, the sensitivity of the vibrometer needs to be adjusted.
Otherwise the vibrometer is measuring properly and sensitivity need not be readjusted.
NOTE: The vibrometer's sensitivity can only be adjusted by authorised and technically qualified
personnel. The readjustment of sensitivity leads to loss of traceability in the calibration of the unit.
To check the Buildings / Structure AC032 accelerometer it will suffice to press the
accelerometer against the calibrator head with the hand. Note that the AC032 accelerometer
has flat surfaces all along it to facilitate placement of the accelerometer on the CV211
vibrator head.
To check the AC033 whole body accelerometer separate the sensor (metal part) from the
rest of the body (plastic part). To do so, loosen the 6 Phillips screws located at the bottom
and pull the sensor (metal part) outwards with the cable. (Do not remove the other screws).
has an optional accessory, AA144, to connect the AC033 accelerometer to the
calibrator in the three directions (X, Y and Z).
The pictures below illustrate how to check the AC031 and AC033 accelerometers.