TPI 9070 Manual de usuario

PAGE 1

9070 Smart Vibration Meter

Instruction Manual

Overall machine and

bearing conditions:

vibration values are displayed

with color coded alarm levels

for ISO values and Bearing

Damage (BDU).

Easy vibration

analysis:

1X (unbalance)

2X (misalignment)

3X (looseness)

Identify complex

issues:

100 to 800-line

spectrum with

zoom and cursor.

Power ON & Measure

Screen Select / Push & Hold for

2 seconds for Menu Setup

Navigation & Cursor Movement

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CONTENTS

DISCLAIMER .................................................... 2

1 OVERVIEW ................................................... 3

1.1 Control buttons................................................ 3

1.2 Batteries .......................................................... 3

1.3 Service ............................................................ 3

2 OPERATION ................................................. 4

2.1 Changing the probe tip.................................... 4

2.2 Taking a reading.............................................. 4

2.2.1 Vibration readings ....................................... 4

2.2.2 Vibration Analysis ......................................... 6

2.2.3 Frequency spectrum..................................... 8

2.3 Settings menu ................................................. 9

2.3.1 Setup Wizard................................................ 9

2.3.2 Load & Save Readings ................................ 11

2.3.3 Advanced Settings........................................ 12

2.3.3.1 BDU settings ............................................. 12

2.3.3.2 Units .......................................................... 13

2.3.3.3 Device Settings ......................................... 13

3 SPECIFICATIONS.......................................... 15

4 REVISION HISTORY...................................... 15

5 OPERATION................................................... 16

Disclaimer

This document has been carefully prepared and checked. No responsibility can

be assumed for inaccuracies. TPI reserves the right to make changes without

prior notice to any products herein to improve functionality, reliability or other

design aspects. TPI does not assume any liability out of the use of any product

described herein; neither does it convey any licence under its patent rights nor

the rights of others. TPI products are not authorised for use as components in

life support services or systems. TPI should be informed of any such intended

use to determine suitability of the products.

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The 9070 is a simple to use vibration monitoring and analysis tool that

allows easy display of vibration signals. The meter automatically per-

forms vibration analysis functions based on machine running speed to

help diagnose faults such as unbalance, misalignment and looseness.

The system is designed to enable a user to take vibration measurements

from assets (e.g. pumps, motors, fans and bearings). The unit displays

vibration frequency plots and allows vibration severity and bearing

condition to be monitored.

1.1 Control buttons

Turning the meter ON is achieved simply by pressing the power on

(circle) button. The unit automatically turns OFF if not used for 1

minute (this time period can be increased up to 60 minutes using the

Setup Wizard).

1.2 Batteries

The 9070 requires two AA size batteries and these can be replaced by

removing the battery compartment cover (held in place by 6 screws) as

shown in the photographs below. Use a #1 phillips head screwdriver to

loosen and tighten the battery cover screws. Using the incorrect screw-

driver will result in damage to the screws.

Care must be taken when the batteries are changed. Make sure the gasket

is properly seated when reinstalling the battery door otherwise the IP67 rat-

ing will be compromised.

1.3 Service

The 9070 contains no user serviceable parts. In the unlikely case of

malfunction, please return the complete unit to your supplier for repair.

1 OVERVIEW

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2.1 Changing the probe tip

Warning: In order to prevent possible damage,

the probe tip should only be tightened using the

machined flats on the probe tip’s mounting plate

and 8mm & 16mm wrenches, as illustrated in the

photo opposite. Do NOT hold or clamp the case of

the Vib Meter when tightening the probe tip or

magnet, as this may cause damage and will invali-

date the warranty.

2.2 Taking a reading

To take a reading, briefly press the circle button to turn the unit ON

and then, while holding the tip of the unit against the machine to be

measured, press the circle button again to take the reading.

This causes the overall vibration

numbers screen to be displayed as

shown in the example screenshot on

the left.

This shows an overall view of the

machine’s vibration condition as

explained in the following sections.

2.2.1 Vibration readings

Once a vibration reading has been taken, the display will show three

values, as shown in the screenshot above.

• ISO value (velocity in mm/second or in/sec)

• Bearing Noise in BDU (Bearing Damage Units)

• Total g (acceleration)

According to ISO standards, values will display on a Green background

indicating a new machine condition, Amber background indicating unlim-

ited long term operation allowable, and Red background indicating vibra-

tion causes damage. Total g (acceleration) always displays on a Blue

background. These readings are explained in more detail below with

some examples of what they actually mean:

2 Operation

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ISO mm/s or in/sec

The ISO value (in mm/s or inch/s) is the large number at the top of the

screen, which is the RMS value of the vibration velocity in the frequency

band 10Hz (600 RPM) to 1kHz (60,000 RPM), as specified

by the ISO standard1.

The ISO value background is color coded according to the ISO 10816-1

vibration velocity level chart (see below). The color coded background

will indicate the condition of the machine according to the relevant

vibration levels for the size and type of machine selected with the

Setup Wizard (see section 2.2.1).

----------------------------------------------------------------------------------------------

1 ISO 10816-1:1995. Mechanical vibration -- Evaluation of machine vibration by measurements on

non-rotating parts

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Bearing Noise (BDU)

Below the displayed ISO value and to the left is the value of bearing

noise (high frequency vibration) in Bearing Damage Units (BDU),

where 100 BDU corresponds to 1g RMS vibration measured above

1kHz. This is a measure of the wear state of the bearings in the equip-

ment being monitored. The higher the number, the more worn the bear-

ing.

It is generally held that 1g of high frequency vibration (100 BDU)

corresponds to a high level of bearing noise and so can be considered

indicative of a damaged bearing. In other words, it may be helpful to

think of the Bearing Noise figure as being very roughly equivalent to

“percentage” of bearing wear.

By default, the bearing noise is displayed on a Red background if it is

above 100 BDU, an Amber background between 50 and 100 BDU

and a Green background below 50 BDU. The BDU alarm levels can be

changed using the Advanced Settings Menu (see section 2.3.3.1).

Total acceleration (g)

This is the RMS (average) value of the total vibration in the ISO

frequency range (10Hz to 1kHz). This reading is shown in units of g

or Earth’s gravitational constant, (where 1g = 9.81 m/s2).

2.2.2 Vibration Analysis

Pressing the square button brings

up a display similar to that shown

opposite, which shows the readings

of vibration velocity (mm/s or inch/s)

broken down into each of 3 bands.

The display shows the vibration velocity in frequency ranges that are all

based on multiples of the specified Run Speed of the machine, and as

displayed beneath the 3 bar graphs.

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In order to perform a vibration analysis it is important that the run-

ning speed of the machine is entered correctly. This is done using

the “Setup Wizard” as described in Section

2.3.1 of this user guide.

The frequency ranges of the bands are based on the following multiples

of running speed2:

1X (Unbalance):

The level of vibration in the frequency band based on the running speed

is usually indicative of how well balanced the machine is. A large

vibration at the running speed usually indicates that the machine is out

of balance. However even a very well balanced machine will usually

show some vibration at the running speed but this figure should ideally

be quite low (e.g. typically less than about 2 mm/sec or .11 in/sec for a

medium sized machine).

2X (Misalignment):

Vibration in the frequency band centered at twice the running speed is a

possible indication of misalignment. This is based on the fact that shaft

misalignment can result in a double peak in the waveform due to there

being two different centres of gravity (one from each shaft). In other

words the accelerometer picks up a peak as each centre of gravity

passes by and hence there will be two positive and two negative peaks

each revolution of the shaft. This will typically give rise to a vibration

signal at double the running speed of the machine.

3X (Looseness):

Vibration in the frequency band centered at 3 times running speed is a

possible indication that something may be loose (e.g. loose mounting

bolts, weak foundations etc.) as it is not usual to see third order vibration

in a machine unless there is some structural looseness that is being

“excited” by the vibration of the machine.

----------------------------------------------------------------------------------------------

2Multiples of running speed are often referred to as “orders”

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2.2.3 Frequency spectrum

Pressing the square button once more brings up a display similar to

that shown below, where the vibration levels are shown as a frequency

spectrum in the range from 0 to 1kHz.

The heights of the peaks indicate the

RMS vibration level in (mm/s or inch/s)

at each frequency point in the spectrum.

The readings to the right of the screen

show the frequency in (Hz or RPM)

and the RMS vibration level in (mm/s

or inch/s) at the position of the cursor

(red dotted line).

The cursor position can be moved by use of the left (<) and right (>)

arrow buttons.

Continuing to press the square button successively increases the

resolution of the frequency axis from 100 Lines (i.e. 10Hz or 600 RPM

resolution) to 200, 400 and finally 800 Lines (i.e. 1.25Hz or 75 RPM

resolution) as shown in the table below.

Increasing the resolution effectively zooms into the frequency spectrum

display and at the higher resolutions the display must be scrolled by

using the left and right arrow buttons in order to view the full spectrum.

Resolution (lines) Resolution (Hz) Resolution (RPM)

100 10 600

200 5 300

400 2.5 150

800 1.25 75

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2.3 Settings menu

The Settings menu is entered by pressing and holding down the square

button for 2 seconds.

This brings up the following screen:

Moving up and down the menu is

achieved by pressing the left (up) and

right (down) buttons which causes the

menu item to be highlighted. Pressing

the square button will select the high-

lighted menu item.

2.3.1 Setup Wizard

Selecting the Setup Wizard opens a dialogue that allows the machine

running speed to be entered and the ISO alarm levels to be set

automatically according to the size and type of machine to be monitored.

The first screen to be displayed shows

the running speed in the previously

selected units (Hz or RPM).

Changing the running speed is

achieved by pressing the left (to

decrease run speed) or right (to

increase run speed) arrow buttons.

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Pressing the square button again

brings up the next screen which allows

the machine type (motor or pump) to

be selected.

Motor - Electrical machine normally

with sleeve or rolling element bearings

and depending on size, operating

speeds above 120RPM to

15,000RPM.

Pump - Multivane impeller with sepa-

rate or integrated drive (centrifigul,

mixed flow, and/or axial flow) with

sleeve or rolling element bearings.

If a motor is selected the size must

be selected (under or over 300kW) or

if a pump is selected, it must be

specified whether it has an integrated

or external drive unit.

Selecting the machine type and size

allows the ISO alarm levels to be set

accordingly, as does specifying the

type of machine mounting (rigid or

flexible).

As a basic “rule of thumb”, unless a

machine is bolted down to concrete,

it should be considered as being

flexible.

Most motors and pumps are mounted

on some kind of frame or structure

and as such should definitely be

considered as flexibly mounted.

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