Commtest Instruments vbBalancer User Manual

Appendix: Specifications
122
Appendix: Specifications
vbBalancer
Specifications Model vbBalancer Remarks
Sensors
Sensor input
Sensors
AC coupled range
Connectors
Analog to digital conversion
Sensor excitation current
Sensor detection
2 channels
Accelerometer
16 V peak-peak
2 x BNC (CH1/CH2)
24-bit ADC
0 mA or 2.2 mA (configurable), 24 V maximum
Warns if short circuit or not connected
Simultaneous sampling
Allows for ± 8 V sensor output swing (± 80 g)
Safety feature: Break-free inline connector
2.2 mA required for IEPE/ICP®-type accelerometer
Tachometer
Sensor
Laser sensor range
Other Sensor types supported
Power supply to sensor
TTL Pulse rating
Keyphasor® threshold
Speed range
Laser sensor with reflective tape included in kit
10 cm to 2 m nominal
Contact, TTL pulse
6 V to 8 V, 50mA
3.5 V (4 mA) min, 28 V (5 mA) max, off-state 0.8 V
13 V ± 1 V
10 RPM to 300 000 RPM (0.2 Hz to 5 kHz)
Sensor triggers on beam reflection
Dependent on size of reflective tape
vb has optically isolated input
Battery voltage with current limit
Parameter Indication
Maximum levels
Dynamic signal range
Harmonic distortion
Units
Magnitude & Cursors
Accuracy
Frequency response
> 1000 g (10 000 m/s2), > 1000 in/sec (25 000 mm/s),
> 100 in (2500 mm), > 10 000 Amps
> 95 dB (typical at 400 line resolution)
Less than -70 dB typical
g or m/s2, in/s or mm/s, mil or mm or µm
Overall RMS value, dual cursors, harmonics
± 1% (0.1 dB)
± 0.1 dB from 10 Hz to 15 kHz;
± 3 dB from 1 Hz to 40 kHz
Effective limit is sensor sensitivity and output voltage
Other distortions and noise are lower
0-peak, peak-peak or RMS. Auto-scale by 1000x when required
Digital readouts on chart
AC measured at 100 Hz
Acceleration and velocity. From value measured at 100 Hz
Spectrum Display
Fmax possible ranges
Fmin possible range
Resolution
Frequency scale
Amplitude scale
Window shapes
Overlap
Number of averages
Averaging types
25, 50, 100, 125, 150, 200, 300, 400, 500, 600, 800,
1000, 1200, 1600, 2000, 2500, 3000, 4000, 5000 Hz
0 to Fmax
400, 800 lines
Hz, CPM, Orders
Acceleration, velocity, displacement
Hanning
50%
4
Linear
Or equivalent CPM values
Or orders-based from 1X to 999X
vb instrument zeroes all spectral lines below Fmin
Linear scale with zooming
Linear or log scales, auto or manual scaling
Waveform Display
Number of samples
Time scale
1024, 2048
80 ms to 32 seconds Or orders based from 1 to 999 revs
Logging Features
Output formats
Data storage
Data storage structure
Max Folder size
Direct print reports
vb screen
1 GB non-volatile flash memory
Folders / machines / points / locations
10 000 measurement locations
Via Ethernet to PCL-enabled printer
Virtually unlimited recording storage!
No limits are applied, 50 character names
Balancing
Planes
Speed range
Measurement type
Weight modes
Remove trial weights
Manual data entry
Storage
Channel selection
2 planes, 2 sensors
30 RPM to 60 000 RPM
Acceleration
Angle 0° to 360°, fixed position, circumference arc
Yes/No
Yes
Against machines in data structure
Single or dual channel
e.g. weights on fan blades, linear dist. around circumference
Automatic recalculation
Allows re-entry of previous balance jobs
No limits are applied

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