Commtest Instruments vbBalancer User Manual

Section 4: Balancing Rotors
38
heavy spot). Setting up the Tachometer (page 32) contains
information on how to set up the tachometer to measure phase
angles.
Suggested Trial Weight Mass and
Location
The instrument can assist with balancing operations by calculating
an appropriate trial weight mass and location for you. Please refer to
topics CH Position and Reference Mark, for help with calculating the
trial weight location, and Machine Information, for help with
calculating the trial weight mass.
Manually Entering Balancing
Information
You have the option to manually enter amplitude and phase values
for the initial, trial and trim readings. This allows you to:
 Interrupt the balancing process without saving the values,
then re-enter them later and continue balancing.
 Experiment with different trial weight masses and
placements to see the effect on the imbalance, without
having to attach weights to the machine.
 Calculate the effect of further trim balances.
 Change the units used in a final balancing report by
selecting different units then re-entering the collected
values.
• To enter a value manually, work through the balancing setup
process as normal then press to take a reading. The
icon will appear in the upper left-hand corner of the
screen (for a dual plane balance the CH2 icon will also
appear).

Commtest Instruments vbBalancer Specifications

General

Channels	2
Frequency Range	0.5 Hz to 20 kHz
Display	Color LCD
Storage Temperature	-20°C to 60°C
Weight	1.5 kg
RPM Range	60 RPM to 60, 000 RPM
Battery Life	8 hours continuous use
Operating Temperature	0°C to 50°C

Summary

Section 1: Introduction

Standard Features

Lists the main hardware and software capabilities of the instrument.

Instrument Capabilities

Precautions

Outlines safety warnings and handling recommendations for instrument use.

Hazardous Locations

Describes conditions for using the instrument in potentially explosive environments.

Instrument Connections

Explains the various input/output ports and their functions on the instrument.

Section 2: Instrument Basics

Powering On/Off

Navigating Menus

Explains how to move through the instrument's menu system.

Section 3: Using Sensors

Supported Sensor Types

Lists compatible sensors and their measurement capabilities.

Connecting Sensors to the Instrument

Explains how to connect sensors using BNC and LEMO connectors.

Mounting Sensors

Setting up the Accelerometer

Details the process for connecting and positioning an accelerometer.

Setting up the Tachometer

Section 4: Balancing Rotors

Methods for Balancing Rotors

Describes techniques for balancing rigid rotors.

The Balancing Process

Outlines the steps involved in rotor balancing operations.

Setting up a Balancing Job

Guides through configuring parameters for a new balancing job.

Balance Planes and Weight Positions

Explains how to define balancing planes and reference marks.

Section 5: Balancing Walk-through

Step 1. Set Up a New Balance Job

Guides setting initial parameters for a balancing job.

Step 2. Take an Initial Reading

Instructions for performing the first imbalance measurement.

Step 3. Take a Trial Reading

Details on applying and measuring with a trial weight.

Step 4. Balance the Rotor

How to apply correction weights based on calculations.

Step 5. Perform Trim Balancing

Steps to further reduce residual imbalance.

Step 6. Viewing and Saving Balancing Jobs

How to review results and save balancing data.

Section 7: Setting Measurement Options

Setting Measurement Units and Spectrum Scaling

Setting Measurement Parameters

Creating Your Own Parameter Sets

Assigning Sensors to Channels

Links physical sensors to specific instrument input channels.

Section 10: Creating, Editing and Deleting Items

Working with Folders

Working with Machines

Creating Machine Structures

Creating Parameter Sets

Defining and Editing Sensors

Process for configuring and modifying sensor settings.

Working with Sensors

Section 11: Utilities

Backing Up the Instrument Database

Procedure for creating a backup copy of instrument data.

Upgrading Instrument Firmware (Proflashing)

Steps to update the instrument's operating software.

Section 12: Troubleshooting

Contacting Technical Support

Information on how to reach Commtest support for assistance.

Resetting an Unresponsive Instrument

How to recover from instrument software freezes or lockups.

Network Communications Problems