MITECH MV800C User manual

MITECH CO., LTD.
www.mitech-ndt.com
www.ponpe.com

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CONTENTS
1.Overview................................................................................................................................................................. 2
1.1 Application.................................................................................................................................................... 2
1.2 Features........................................................................................................................................................2
1.3 Technical Parameters................................................................................................................................. 2
1.4 Working Principle........................................................................................................................................ 2
1.5 Working Conditions.....................................................................................................................................2
1.6 Configuration................................................................................................................................................3
2.Structure and Outline..........................................................................................................................................3
2.1 Main Unit.......................................................................................................................................................3
2.2 Display...........................................................................................................................................................3
3.Keypad Definition.................................................................................................................................................3
4.Operation................................................................................................................................................................ 3
4.1 Preparations Before Using........................................................................................................................ 3
4.2 Selection of Probe.......................................................................................................................................4
4.3 Frequency Switch........................................................................................................................................4
4.4 Set Vibration Parameters...........................................................................................................................4
4.5 Set Frequency Range.................................................................................................................................5
4.6 Signal Output............................................................................................................................................... 5
4.7 Troubleshooting........................................................................................................................................... 5
5.Cautions..................................................................................................................................................................5
6.The Standard of Vibration Intensity................................................................................................................ 5
7.Maintenance& Notes............................................................................................................................................6
User Notes................................................................................................................................................................. 7
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1.Overview
MITECH portable vibration meter MV800C is made up of piezoelectric transducer and digital display
circuit. It is mainly used to measure vibration acceleration, speed and displacement of various rotary
machine. This product has the advantages of large measurement, wide variety, intuitively demonstration,
small size, light weight etc. It is widely used in measurement on site or at height and can reduce the
working strength, improve the working efficiency.
1.1 Application
MV800 is mainly used in monitoring the vibration of machines, such as industries of manufacturing,
electric, metallurgy, vehicle etc, specific on the quick check and preventive check of bearing, gear, motor,
fan lathe etc.
1.2 Features
Separate design, small size, stable performance low-consumption,attractive appearance.
Liquid crystal display, humanized interface, easy to operate.
Apply to harsh environment, with anti-electromagnetic interference ability, high accuracy.
High frequency and low frequency measurement, easy to judge fault type of machine.
Equip reliable ring accelerometer, superior than compression type sensor
Auto sleep and auto power off
In accordance with national standard, the measurement value can be compared with ISO2372 to
judge the running state of device.
Signal output, equips with earphone can realize the function of stethoscope.
Signal output equips with oscillometer to monitor and record the vibration.
1.3 Technical Parameters
Vibration pickup: Integrated ring acceleration transducer
Measurement range(displacement): 0.001~1.999mm(Peak to peak: valid value*2√2)
Measurement range(speed): 0.1~19939mm/s (valid value)
Measurement range(acceleration): 0.1~199.9m/s2(peak value: valid value*√2)
Measurement accuracy: ±5% measured value
Indication error: ±2
Frequency range: 10Hz~10KHz
Display mode: 3-digit Semi liquid crystal display
Sampling period: 1s
Output signal: AC 2v(peak value, full measurement above 10k)
Dimensions: 185mm*68mm*30mm
Power model: 6F22 9v packed cells
Battery life: continuous use for 30 hours
1.4 Working Principle
MV800C combines the quartz crystal and PZT piezoelectric effect together. When the quartz crystal or
PZT is under strength, the surface generates charger, the vibration was changed into electrical signal by
acceleration transducer. After processing and analyzing, the acceleration, speed and displacement are
shown out in the liquid screen.
1.5 Working Conditions
Operation temperature: 0~50℃
Memory temperature: -30℃~+70℃
Relative humidity: below 90%RH
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1.6 Configuration
2.Structure and Outline
2.1 Main Unit
2.2 Display
3 Keypad Definition
1Long press measurement key, put the magnetic base on the surface of workpiece, keep it
stable, the value will be shown out.
2When the measurement value is stable, release the measurement key, read and record the
value.
3Press measurement key again can exit the former test and do the new test.
4Release the measurement key for about 1 minute, it will auto power off.
4.Operation
4.1 Preparations Before Using
1Install battery
Open the cover, put in the battery.
1Check the battery voltage
Configuration
NO.
Part name
QTY.
Remarks
Standard
config
1
Main unit
1
2
Short probe
1
3
6F22 battery
1
4
User’s manual
1
5
Warranty
1
Optional
config
6
Long probe
1
7
Earphone
1
8
Sheathe
1
9
Cable (signal line)
1
Measurement
key
Display
Cableline
port
High
frequency
Low
frequency
Acceleration
Speed
Displacement
Parameter key
Frequency key
Measure key
Audio jack
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Press measurement key, if the screen shows this, it means the voltage is low, you need to change a
new one.
4.2 Selection of Probe
The principle of selecting probe
When measure the displacement, speed, acceleration of low frequency 10Hz~1KHz, select long probe,
when measure the displacement, speed, acceleration of high frequency of 1KHz~10KHz, select short
probe, short probe also used to maintain the reliable accuracy, when there is a flat frequency above
1KHz, there is no need to use probe.
Short probe
Short probe is necessary for frequency of 10Hz~10KHz. It is more reliable.
Long probe
When the short probe is hard to test, use 8cm long probe. In low frequency of 10~1KHz, long probe has
good response, above 1KHz, the response will reduce.
No probe
It is ok when the surface is well connected, if the sensor and workpiece is not well connected, the
response frequency can’t be guaranteed. If the surface is rough, cover some wax to guarantee the
frequency response.
4.3 Frequency Switch
Choose correct frequency range
4.4 Set Vibration Parameters
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Use measurement parameter key to select acceleration, speed, displacement.
4.5 Set Frequency Range
Use frequency range key to select “LO” or “HI”
4.6 Signal Output
The vibration signal is outputted by signal port, the port can connect the oscillometer or the
earphone(when the signal is at full range, output 2v peak value wave form).
1Connect the earphone, long press the measurement key
2Adjust the volume key, you can hear the vibration
3Switch the frequency range, you can hear the high frequency and low frequency
4.7 Troubleshooting
MV 800 has low frequency and high frequency switch, can judge the fault of bearing and gear, when the
value of low frequency is higher than high frequency, it means the vibration is caused by low frequency,
we can consider bear problems, such as rotor imbalance, bearing bend, bearing not centered, base
loose, when the high frequency is 5 times bigger than low frequency, it means the vibration is caused be
high frequency, such as the deterioration of rolling bearing, gear tooth broken etc.
5. Cautions
When using integrated vibration meter, the strength on probe should between 5N-10N.
Pay attention to the right angle of probe
When using different probes, the results might be different(especially in high frequency)
Do not use pincers to avoid damage
Theoretically, MV800C can test acceleration of 199.9m/s, while in reality the collision of probe make
the test range lower than199.9m/s2, usually the limit of acceleration is 50m/s2.
6. The Standard of Vibration Intensity
The vibration is from structure design, manufacture, apply, adjust, it will cause metal fatigue, component
abrasion and other faults. The 10~1KHz low frequency vibration is mainly because metal fatigue, the
above 1KHz high frequency vibration is mainly because resonance.
Metal fatigue is proportional to vibration speed, the vibration power is proportional to speed square. No
matter metal fatigue or abrasion, it is proper to use speed standard. Compare the results with ISO2372,
we can know the device current running state.
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7.Maintenance& Notes
Avoid man-made damage, put sheathe when using
When the battery is almost out, please change the battery
Take out the battery when not using to avoid the battery leakage
After using, clean the tester with soft cloth, avoid rain or oil infiltration
When there happens abnormal things, please do not self dismantle the tester, deliver it to our
company.
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User Notes
Warranty：
The product is guaranteed for one year since purchased. Log www.mitech-ndt.com or follow our
company official public platform to register for maintenance. Please fill the blanks as required, if the
product is not registered for maintenance, it will follow the date of manufacturer.
When applying for maintenance, please visit our official website, www.mitech-ndt.com or official
accounts, submit “online reporting to repair” sheet.
In accordance with the international relevant regulations, the following are not within the scope of free
warranty,
Damage caused by man-made or improper keeping;
Self-dismantle or non-special repair shop dismantle;
Do not follow the requirement of service registration or warranty expired;
Consumable parts.
Service promise：
MITECH users have lifelong maintenance service
Free maintenance, inspection, software upgrade and etc.
Add: Room E506, YingChuangDongLi Park, 1# of ShangDi East Road,
Haidian District, Beijing, China
Post code: 100085
Website: www.mitech-ndt.com
Email: [e-mail]
Tel: [phone]
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