Kusam-meco KM 3961 Bedienungsanleitung

VIBRATION METER

MODEL - KM 3961

OPERATION

MANUAL

G 17,Bharat Industrial Estate, T. J. Road,

Sewree (W), Mumbai - 400 015. INDIA.

Sales Direct : (022) 24156638

Tel. : (022) 24124540, 24181649. Fax : (022) 24149659

Email : [email protected]

Website : www.kusamelectrical.com

www.kusam-meco.co.in

VIBRATION METER

MODEL - KM 3961

1. FEATURE :

In accordance with ISO 2954, used

for periodic measurements, to detect

out-of-balance, misalignment and

other mechanical faults in rotating

machines.

Specially designed for easy on site

vibration measurement of all rotating

machinery for quality control,

commissioning, and predictive

maintenance purposes.

Individual high quality accelerometer for

accurate and repeatable measurements.

Bearing condition monitoring function.

LCD digital display.

Lightweight and easy to use

Wide frequency range (10Hz To 10kHz)

in acceleration mode.

AC output socket for headphones and

recording.

Optional head phones for use as

electronic stethoscope.

Can communicate with PC computer for

statistics and printing by the optional

cable and the software for RS232C

interface.

® ®

®®

KM-3961

VIBRATION TESTER

INCH

FUNC.

METRIC

HOLD

FILTER

VOL.

® ®

Display : 4 digits, 18 mm LCD Measured

values and makers (units, 10,

and battery symbol)

Transducer :Piezoelectric accelerometer

Parameters measured :

Velocity, Acceleration, and Displacement

RPM and Frequency

Measuring range :

Velocity : 0.01-400.0 mm/s true RMS

0.000-16.00 inch/s

Acceleration : 0.1-400.0m/s2

equivalent peak 0.3-1312 ft/s2

Displacement : 0.001-4.000mm

0.04-160.0 mil, equivalent pk-pk

RPM (r/min) : 60-99,990 r/min

Readings should be multiplied

by 10 if the display show '10'.

Frequency : 1-20 kHz

Frequency range for measuring

Acceleration : 10Hz to 1kHz In '1' mode

10Hz to 10kHz In '10' mode for

bearing condition check

Velocity : 10Hz to 1kHz

Displacement : 10Hz to 1kHz

Accuracy : ±5%+2 digits

Metric/ Imperial conversion

PC interface : RS232C

2. SPECIFICATIONS : Output : AC output 2.0V peak full scale

(load resistance : above 10k)

Power supply : 4x1.5 AAA size (UM-4)

batteries

Operating conditions :

Temperature : 0-40

Humidity : below 90% RH

Dimensions : 124x62x30mm /

4.9x2.4x1.2 inch

Weight : 120g (not including batteries)

Accessories included :

Powerful rare earth magnet.....1 pc.

Accelerometer..........................1 pc.

Stinger probe (Cone)...............1 pc.

Stinger probe (Ball)..................1 pc.

Carrying case...........................1 pc.

Operation manual....................1 pc.

Optional accessories :

Headphones for use as electronic

stethoscope Cable and software for

RS232C.

02 03

® ®

3-1 Accelerometer

3-2 Display

3-3 Input Connector

3-4 Hold key

3-5 Power Key

3-6 Metric / Imperial conversion key

3-7 Function key

3-8 Filter key

3-9 Sound key

3-10 Jack for the headphone

3-11 Jack for RS232C interface

3-12 Battery cover/compartment

3. :FRONT PANEL DESCRIPTIONS

1. Connect the Accelerometer to the

input connector and turn it until the

connector locks in position.

2. Mount the accelerometer at the

measurement point using the powerful

magnet supplied, ensuring that the

mounting surface is clean and flat, or

use direct stud (M5) mounting if this is

available.

3. Depress the power key and release to

power on the meter.

4. Each time the Function key is

depressed and released quickly, the

meter will step to the next vibration

measurement parameter with the

corresponding unit showing on the

display.

5. Each time the Metric / Imperial key is

depressed and released quickly, the

measurement unit will be changed to

the other measurement system.

4. :MEASURING PROCEDURE

®®

KM-3961

VIBRATION TESTER

INCH

FUNC.

METRIC

HOLD

FILTER

VOL.

3-6

3-8

3-9

3-10

3-2

3-7

3-4

3-5

3-12

3-1

DISP

273

04 05

® ®

6. When several machinery or bearings

are used under the same operating

conditions, evaluation can be carried

out by listening to the audio signals

to determine changes. This method will

help to locate the defective machinery

or be a ring quickly. Measure all

machines at the same points and

compare the results. The sound volume

can be adjusted by Sound key 3-9.

There are 8 levels from 1 to 8. Every

time depressing and releasing the

sound key quickly, the sound level will

increase 1. The larger the sound level

number, the louder the listening sound.

vibration parameter. It is used for

vibration severity measurements in

accordance with ISO 2372, BS 4675 or

VDI 2056, which are guidelines for

acceptable vibration levels of machinery

in different power categories. These are

presented as a table in section 4 of this

manual. Velocity is typically measured in

cm/s or inch/s RMS (centimeters or

millimeters per second).

Velocity is the most commonly used

This instrument measures in cm/s. If you

are more familiar with measurements in

mm/s, or wish to compare your measured

values directly with the vibration severity

chart in section 4, multiply the displayed

value by 10.

Displacement is typically used on low-

speed machines because of its good low

frequency response, and is relatively

ineffective when monitoring bearings.

Units are typically mil or mm equivalent

peak-peak.

Note :

1. Which parameters should be

measured ?

Acceleration, velocity, & displacement

are the three tried and tested parameters,

which give accurate and repeatable

results. Acceleration is normally

measured in m/s peak (meters per

second squared) or ft/s , has excellent

high frequency measurement capabilities,

and is therefore very effective for

determining faults in bearings or

gearboxes.

5. :CONSIDERATIONS

06 07

® ®

Vibration is a reliable indicator of the

mechanical health or condition of a

particular machine or product. An ideal

machine will have very little or no

vibration indicating that the motor, as well

as peripheral devices such as gearboxes,

fans, compressors, etc., are suitably

balanced, aligned, and well installed. In

practice, a very high percentage of

installations are far from ideal, the results

of misalignment and imbalance exerting

added strain on supporting components

such as bearings. Eventually this lead to

added stress and wear on critical

components, resulting in inefficiency, heat

generation and breakdowns. This often

occurs at the most inconvenient or

uneconomical times, causing costly

production downtime. As parts of

mechanical equipment wear and

deteriorate, the equipment vibration

increases.

2. An Introduction To Vibration

Measurement

Monitoring the vibration of healthy

mechanical equipment on an ongoing

basis, detects any deterioration long

before it becomes a critical problem,

allowing spares to be ordered in advance

and maintenance to be planned only

when necessary. In this way stocks of

expensive and unnecessary spares can

be reduced with obvious financial benefits.

Unscheduled breakdowns result in

production losses and the faulty

equipment is usually repaired hastily to

get production going as quickly as

possible. Under these stressful conditions

staff are not always able to do repairs

correctly regardless of how conscientious

they are, resulting in a high probability of

further early equipment failure.

By implementing a predictive maintenance

program with regular measurements of

critical factors like vibration, downtime

can not only be reduced, but planned

maintenance is more effective, resulting

in improved product quality and greater

productivity.

08 09

® ®

A trend is an indication of the way in

which a monitored vibration parameter

behaves over time. If regular vibration

measurements are taken and plotted

over a period of time, the resulting graph

shows the progress or deterioration of a

particular machine.

Typically this will have the general shape

shown in the diagram below, regardless

of the type of machine being considered.

For a short time after installation, whether

it is a new or a repaired machine,

vibration levels may fall slightly as the

machine is run in, followed by a long

period of unchanging levels during the

machine's normal operating lifetime. Then

comes a period of rising levels as

machine parts wear out prior to failure.

Such a trend enables the maintenance

engineer to predict the time of failure and

maximize use of the machine, while

ordering spares and planning its

maintenance for a time convenient to the

production schedule.

3. What is a Trend ?

1. When the battery symbol appears on

the display, it is time to replace the

battery.

2. Slide the Battery Cover ( Fig. 1, 3-12)

away from the instrument and remove

the battery.

3. Install batteries paying careful attention

to polarity.

6. BATTERY REPLACEMENT :

A. Rank of machine vibration (ISO 2372)

7. Appendix : Vibration standards

Vibratio amplitude Machine sort

II III IV

Vibration velocity V rms (mm/s)

0 ~ 0.28

0.28 ~ 0.45

0.45 ~ 0.71

0.71 ~ 1.12

1.12 ~ 1.8

1.8 ~ 2.8

2.8 ~ 4.5

4.5 ~ 7.1

7.1 ~ 11.2

11.2 ~ 18

18 ~ 28

28 ~ 45

> 45

10 11

® ®

1. Class I is small motor (power less than

15 kw). Class II is medium motor

(power between 15 ~75kw). Class III is

high power motor (hard base). Class

Ⅳis high power motor (stretch base).

A,B,C,D are vibration Rank. 'A' means

good, 'B' means satisfying, 'C' means

not satisfying, 'D' means forbidden.

Vibration velocity should be taken from

the three perpendicular axes on the

motor shell.

Note :

B. ISO/IS2373 Motor quality standard

according as vibration velocity.

Quality rank Rev (rpm)

Normal (N)

Good (R)

Excellent (S)

600 ~ 3600

600 ~ 1800

1800 ~ 3600

600 ~ 1800

1800 ~ 3600

H : high of shaft (mm)

Maximum vibration velocity (rms)

(mm/s)

80<H<132 132<H<225 225<H<400

1.8

0.71

1.12

0.45

0.71

2.8

1.12

1.8

0.71

1.12

4.5

1.8

2.8

1.12

1.8

Limit of rank 'N' is suitable for common

motor. When the request is higher than

that in the table, limit can be gotten by

dividing the limit of rank 'S' with 1.6 or

multiples of 1.6.

C. Maximum vibration of motor that power

larger than 1 horsepower (NEMA

MG1-12.05).

Rev (rpm) Displacement (P - P) (um)

3000 ~ 4000

1500 ~ 2999

1000 ~ 1499

999

25.4

38.1

50.8

63.6

*For AC motor, rev is maximum

synchronous rev. For DC motor, it is

maximum power rev. For motor in series,

it is work rev.

D. Maximum vibration of high power

induction drive motor (NEMA MG

1-20.52).

Rev (rpm) Displacement (P - P) (um)

3000

1500 ~ 2999

1000 ~ 1499

999

25.4

50.8

63.6

76.2

National Electric Manufacturers Association

(NEMA)

Establishes two standards above.

12 13

WARRANTY

Each “KUSAM-MECO” product is warranted to be free from

defects in material and workmanship under normal use &

service. The warranty period is one year (12 months) and

begins from the date of despatch of goods. In case any

defect occurs in functioning of the instrument, under proper

use, within the warranty period, the same will be rectified by

us free of charges, provided the to and fro freight charges are

borne by you.

This warranty extends only to the original buyer or end-user

customer of a “KUSAM-MECO” authorized dealer.

This warranty does not apply for damaged Ic’s, fuses, burnt

PCB's, disposable batteries, carrying case, test leads, or to

any product which in “KUSAM-MECO’s” opinion, has been

misused, altered, neglected, contaminated or damaged by

accident or abnormal conditions of operation or handling.

“KUSAM-MECO” authorized dealer shall extend this

warranty on new and unused products to end-user

customers only but have no authority to extend a greater or

different warranty on behalf of “KUSAM-MECO”.

“KUSAM-MECO’s” warranty obligation is limited, at option,

free of charge repair, or replacement of a defective product

which is returned to a “KUSAM-MECO” authorized service

center within the warranty period.

THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE

REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES,

EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED

TO ANY IMPLIED WARRANTY OF MERCHANTABILITY

OR FITNESS FOR A PARTICULAR PURPOSE. “KUSAM-

MECO” SHALL NOT BE LIABLE FOR ANY SPECIAL,

IND IRE CT, INCIDENTAL OR CON SEQ UEN TIA L

DAMAGES OR LOSSES, INCLUDING LOSS OF DATA,

ARISING FROM ANY CAUSE WHATSOEVER.

All transaction are subject to Mumbai Jurisdiction.

MUMBAI

TEST CERTIFICATE

VIBRATION METER

This Test Certificate warrantees that the

product has been inspected and tested in

accordance with the published specifications.

The instrument has been calibrated by using

equipment which has already been calibrated

to standards traceable to national standards.

MODEL NO. ____________

SERIAL NO. ___________

DATE: ___________

ISO 9001

REGISTERED

PASS

KUSAM-MECO

KM 3961

14 15

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