Metrix VM2800 Manuale utente
MODEL VM2800 & VM3800
VibraCheck Limited and
VibraCheck II Vibration Meter
Installation Manual MN100003
8824 Fallbrook Dr.
Houston, TX 77064, USA
Tel: 1-281-940-1802
After Hours TechnicalAssistance: 1-713-452-9703
Fax: 1-713-559-9421
E-mail: [email protected]
www.metrixvibration.com
MN100003 REV A (12/07/10)
METR
IX
Experience Value
MN100003 REV A (12/07/10) Page 2
Welcome................................................................................................................3
What is in the box?................................................................................................4
Specifications for VibraCheck Limited and VibraCheck II: ....................................5
General Layout of the VibraCheck II: ....................................................................6
Inside the VibraCheck Limited & VibraCheck II:...................................................7
VibraCheck II Quick Guide:...................................................................................9
Display of the VibraCheck II:...............................................................................10
Operation of the VibraCheck Limited and VibraCheck II:....................................12
Using your VibraCheck Limited and VibraCheck II:.............................................16
Vibration level definitions:....................................................................................17
Setting the Units on your VibraCheck Limited & VibraCheck II...........................18
Sensitivity adjustment:.........................................................................................19
MN100003 REV A (12/07/10) Page 3
Welcome
Congratulations on your purchase of the VibraCheck Limited or VibraCheck II Vibration Meter. This
instrument is built with pride and has features that you will find useful in your measurements. This
manual will provide you with all the information you require to get the greatest benefit from your
measurement system.
Engineers, technicians and maintenance personnel will find that the VibraCheck Limited or
VibraCheck II is intuitive, has an easy to use keypad and is invaluable for route collection, and for
vibration measurements.
System Contents
Your system includes this manual, the VibraCheck Limited or VibraCheck II Meter, 9 Volt battery,
accelerometer with coiled cable, and a hard carrying case.
Quality Control - Calibration
Your system has been calibrated to the highest standards.
The VibraCheck Limited or VibraCheck II has been designed to be rugged and durable for
harsh environments. This instrument has rubber seals to protect it from splash and oil in harsh
environments.
The VibraCheck Limited or VibraCheck II is calibrated at the factory to ensure that the measurement
you are making is accurate and repeatable. It is recommended that your meter be verified at least
once per year for accuracy.
Using This Manual
In this manual you will find information for using the various features of the VibraCheck Limited or
VibraCheck II. Once you become familiar with the system, you will only need to refer occasionally
to this manual for specifications or to certain aspects of operation.
Help
Metrix wants to help you get the most from your system. If there is anything else we can do, please
feel free to call or Email us.
Telephone: 281-940-1802
Service Department- service@metrixvibration.
Or you can visit our website at: www.metrixvibration.com
The website is the first place to look for product updates, application notes, or technical tips.
ICP is a registered trademark of PCB electronics.
MN100003 REV A (12/07/10) Page 4
What is in the box?
The VibraCheck Limited or VibraCheck II measurement kit comes standard with the following
items:
Fig A. 1 ea. VibraCheck Limited or VibraCheck II
Fig. B. 1 ea. 9 Volt Battery
Fig. C. 1 ea. G-Spike probe and magnetic base
Fig. D. 1 ea. Coiled Accelerometer cable
Fig. E. 1 ea. Accelerometer 100 mV/ g 50 g range.
Fig. F. 1 ea. High strength magnetic base for
Accelerometer
Fig. H. 1 ea. Calibration certificate
Fig. I. 1 ea. Molded plastic carrying case
Accelerometer with detachable
magnetic base
Fig. E, F
VibraCheck Limited or
VibraCheck II
Fig. A
Coiled Accelerometer cable
Fig. D
9 Volt Battery
Fig B
G-Spike
Fig C
Molded plastic carrying case
Fig. I
Options:
Fig J 1 ea. Headset
with cable
MN100003 REV A (12/07/10) Page 5
Specifications for VibraCheck Limited and VibraCheck II:
Displacement 0- 1999 um, p-p (10 1 kHz BP) (0.00 - 78.7 mil)
Velocity 0.0 – 1999.9 mm/s, 0-p (10-1 kHz, ISO 2954) (0.00 –
7.87 in/ sec)
Acceleration 0.00 – 19.99 g, rms (10 Hz HP)
Bearing Condition 0.0 – 199.9 mm/s (0-p), 500 Hz- 2 kHz) (0.00 – 7.87
in/sec.)
Accuracy 5% (10 – 10 kHz)
Temperature Rating -10°C to +69°C
Battery Indicator Low / 25%, 50%, 75%, Full, graphical indicator
Sensor bias indicator Normal/ Open/Short, graphical indicator
Back light LED back light, auto off
Sensor Sensitivity 100 mV/g +- 30% adjustable
Housing rating IP 65, with EMI protection
AC output 2.8V
Power supply 9V alkaline battery (approx. 30 Hours operation)
Auto power off 5 minutes after pressing any key
Display 120 x 32 graphic mode LCD
Size 180 x 92 x 32 mm (7.1 x 3.6 x 1.2 in.)
Weight 300 grams (including battery)
Hold function Freezes the display
Average function Display the averaged value of the last 10 data points
Peak hold function Displays the maximum value
Gain X10, increases the reading precision by 1 decimal
place.
Displacement w/ Gain 0.00 – 199.9 um, p – p, (0.00 – 7.87 mil)
Velocity w/ Gain 0.00 – 19.99 mm/s, 0-p (0.000 – 0.787 in/s)
Acceleration w/ gain 0.00 – 1.999 g, rms
**Memory Up to 1000 points can be stored
**Review function Recall and display the saved data
** VibraCheck Limited
MN100003 REV A (12/07/10) Page 6
General Layout of the VibraCheck II:
Headphone Jack Accelerometer input ICP
type only.
Alpha numeric LCD display
9 Volt battery Keypad
MN100003 REV A (12/07/10) Page 7
Inside the VibraCheck Limited & VibraCheck II:
The VibraCheck Limited and VibraCheck II comes equipped with the highest quality components for accurate
and repeatable vibration measurements. In the next sections, we will discuss how measurements are detected,
filters and the reasons for having them.
How is the vibration values measured? Internally, a (RMS) Root Mean Square detector is used to process the
vibration signals. Peak to peak values are computed directly from this RMS value. One of the nice features of
the VibraCheck and VibraCheck II is the ability of the user to select the desired units for measurement, ie. RMS
or Peak to Peak (p-p) for example. Because the VibraCheck Limited and VibraCheck II has smart features, the
user can make vibration measurements using their favorite unit of choice.
Filters: Each VibraCheck Limited and VibraCheck II has built in filters to condition a vibration signal. A
vibration signal whose frequencies are not within the filter range will result in null reading or decreased values.
Acceleration: 10 Hz, High Pass filter
Velocity: 10 – 1KHz, Band Pass filter (conforming to the ISO2954 Standard)
Bearing Condition: 500 Hz to 2 kHz Band Pass Filter
Displacement: 10 – 1KHz, Band Pass filter (conforming to the ISO2954 Standard)
Note that the filters are forth order, -24dB/Octave roll-off.
MN100003 REV A (12/07/10) Page 8
Typical high pass filter
Typical band pass filter
MN100003 REV A (12/07/10) Page 9
VibraCheck II Quick Guide:
To begin:
1. Press and hold the on/ off button for 4 seconds. Press
the on/ off button again to illuminate the display.
2. Connect accelerometer and headphone or optional
thermometer if desired.
3. Select desired test you wish to make; Displacement,
Velocity or Acceleration.
4.You may also choose in addition other functions such as
hold. This “freezes” the display until the hold is pressed
again. Gain will increase the resolution by one decimal
place.Avg./PK(peak)allowsyoutoselect eitherAverage
or Peak. Selecting Average will slow the display by only
displaying average of the last 10 readings. Peak displays
only the highest peak value. BRG (bearing) is a high
pass filter that filters values below 500 Hz. This means
that you will not see anything on the display below 500
Hz bandwidth.*
Note: Hold, Gain, Avg/ Pk, and BRG are used with the
test mode selected: disp, vel, or accel.
MN100003 REV A (12/07/10) Page 10
Display of the VibraCheck II:
1. Bias Indicator: The Bias indicator is located on the left side of the display. The VibraCheck Limited and
VibraCheck II continuously monitors the bias condition of the ICP accelerometer and indicates the status on the
display. There are 3 conditions: OK, High and Low.
OK: ICP bias is in the normal range, everything is working correctly including the cable.
High: Usually the sensor or cabling is not connected to the meter.
Low: The ICP circuit is shorted. Check the cabling immediately.
Caution: Do not operate the meter when you observe a high or low bias condition. Inspect and replace as
required.
1. Bias Indicator status:
OK- Open- Short-
4. Battery Indicator
3. Vibration units and
method of detection
2. Numerical value of the
vibration level
5. Hold, Gain,
Average or Peak and
memory review modes –
V=Pod II only
6. Storage location label for point storage or
route based data collection storage- V-Pod II
only
7. Stored data indicator
V-Pod II only
Low
High
OK
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