CMTR502 GX m7 2ch BAL

Two Channel Measurement Overview• Two channel measurements may be triggered or non triggered • For simultaneous two channel measurements, one of the two channel inputs must be input

2 Channel / Balancing Overview

Two Channel

Measurements

Two Channel Measurement Overview

• Two channel

measurements may be

triggered or non triggered

• For simultaneous two

channel measurements,

one of the two channel

inputs must be input Y

(CH2)

• Not able to view orbit

displays in the Microlog’s

Review mode

Orbit Time X vs time Y, unfiltered or order-

filtered (up to 8 orders), plus DC gap measurement

Dual Spectrum

Spectra of both input channels captured and displayed simultaneously

Dual-Time Time waveforms of both input channels

captured and displayed simultaneously

Cross- Channel Phase

Phase of input X relative to input Y: Both spectra are stored and phase is displayed as a table of

magnitude/phase pairs with up to 8 orders

2 Ch Meas Accessed from Non ROUTE Mode

• Select the Orbit

Orbit Measurement Overview

• An “orbit” measures the path of a shaft

centerline motion during rotation

• Machines such as large centrifugal

compressors, primary and secondary

steam turbines, and large gearboxes

• Machinery that uses pressure fed

sleeve bearings is normally both critical

to plant operations and very expensive

to repair

• It is essential that these rotors are

effectively monitored, protected, and

maintained to the highest standard

Orbit Measurement Sequence

orbit meas selection orbit meas setup orbit meas display

Orbit Measurement Display

measurements

• Results saved as four

individual meas.

• Two overall displays

for the DC Gap

measurements, one

for CH1, the next for

CH2

• Two graphic displays

for the two dynamic

orbit traces, one for

CH1, the next for

CH2

2 CH Spectrum / Time Waveform Meas.

• Spectra / time waveforms of

both input channels captured

and displayed simultaneously

• Both channel traces are

displayed in a split screen

• 1 – to display only the upper

2 CH Spectrum / TW Meas Setup

∗ Specify the Configuration menu’s

Single Shot or Continuous

option

• Specify the Non ROUTE / User /

Display Format option as either

Spectrum or Time

• Specify the Non ROUTE / User /

Input Channel option as either X

& Y or Z & Y

• Configure other User setup

screen parameters as needed

2 CH Spectrum / TW Meas Display

2 CH Spectrum Display 2 CH Time Waveform Display

• Stored as two individual

Cross Channel Phase Meas.

• Relative Phase - phase difference

of input X relative to input Y

• Both spectra are stored and may

be displayed

• Phase is displayed as a table of

magnitude/phase pairs with up to

8 orders of running speed

Cross Channel Phase Meas Setup

• Specify the Non ROUTE / User /

Display Format option as Phase

• Specify the Non ROUTE / User /

Input Channel option as either X

& Y or Z & Y

• Configure other User setup

screen parameters as needed

Specify RPM Options

• Three options for entering the RPM for cross channel phase meas.

• dBase - Take the RPM value from the

GX’s database, if previously assigned

to the POINT

• Type In - Type in the value using the

numeric keypad, or

• Spec - Select the 1X RPM frequency

from a spectrum display

Cross Channel Phase Table

CH 1 and CH2 magnitude readings for eight

orders

cross channel phase readings for eight orders

shaft speed

Cross channel phase reading for highlighted order

phase table and spectral

Cross-Channel Phase Meas Storage

• Stored as two individual

measurements in the Review

mode, occupying two lines

on the Non-ROUTE Review

screen

• The first measurement is the

CH1 spectrum, with the

relative phase angle table

• The second measurement is

the CH2 spectrum, without

the relative phase angle

table

Balancing

Measurements

• Real life balancing conditions require

a thorough understanding of

machinery vibration and balancing

techniques We strongly suggest

you attend the SKF Reliability

Maintenance Institute Machinery

Balancing course to gain balancing skills necessary for successful

machinery balancing jobs

• This course’s Balancing module

simply overviews the Microlog’s

balancing capabilities and introduces

a single-plane balancing procedure to familiarize you to the machinery

balancing process

Microlog Balancing Overview

• Resolves single-plane, two-plane, and static-couple balances with high precision

• Interfaces with off-the-shelf laser tachometers,

optical tachometers, or stroboscopes for balancing phase measurements

• Balancing requires a shaft 1X signal either to the external trigger BNC input or to the phase adapter connector

• A TTL trigger is not required The Microlog allows for an external analog trigger, with an appropriate trigger threshold

Microlog Balancing Overview

additiona

l setup options

• Balancing “wizards” provide

clear, comprehensive setup

menus and easy-to-follow

display screens with

g jobs

Balancing “Run” Overview

• Stop - Set Up Balancing Equipment and

Measurement Parameters

• Spin - Perform the Reference Run

• Stop - Attach a Trial Weight

• Spin - Perform the Trial Run

• Stop - Attach the Permanent Correction Weight

• Spin - Perform a Correction Weight Run

• Stop - If Necessary, Attach a Trim Weight

• Spin - Perform a Trim Run

Example Balancing Run Screens

Quick Review