Commtest Instruments vb Series User Manual

Section 3: Onsite Analysis - Measurement Menu
42
To store the measurement see Storing Measurements (page 54).
Note: In free run mode with peak hold averaging, the instrument will
continue sampling and displaying the peak values for each spectral
line.
Tips:
With the spectrum displayed press
or to move the cursor
and check the frequency of any resonance peaks found.
Press
then to clear the spectrum.
Setting your own parameters
Option
Custom Setup allows you to customize this menu to use
your own settings instead of the factory defaults. See Custom Setups
(page
57) for more information.
7. Coast-down/Run-up Recordings
Coast-down and run-up recordings involve taking a series of
recordings with a short delay between them. This technique can be
used to study the resonance behavior of a machine as its speed
gradually increases during power-up or decreases during coast-
down.
• From the Main Menu press
Measure then to
display the Coast-Down/Run-Up Menu.
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Commtest Instruments vb Series Specifications

General

Type	Vibration Analyzer
Storage Temperature	-20°C to 60°C
Channels	1 or 2
Data Storage	Internal memory and removable SD card
Display	Color LCD
Power	Rechargeable battery
Connectivity	USB
Battery Life	Up to 8 hours

Summary

Section 2: Basic Operation

Mounting Sensors

Provides instructions on correctly attaching accelerometers and other sensors for accurate measurements.

Tachometer Setup

Section 3: Onsite Analysis - Measurement Menu

Walk-through: Taking Measurements

A step-by-step guide on performing onsite measurements using the instrument's Measure Mode.

Fault Types and Phase Relationships

Section 4: Manual Setup Measurement Parameters

Setting Measurement Parameters

Guides users through manually configuring all parameters for taking measurements.

Setting Spectrum Parameters

Setting Waveform Parameters

Section 5: Recording Data

Walk-through: Taking Recordings

Section 6: Using Routes

Walk-through: Taking Recordings Using a Route

Section 8: Creating Machines

Section 9: Balancing Rotors

The Balancing Process

Outlines the sequential steps involved in performing a rotor balancing procedure.

Trial Readings (Single/Dual Plane)

Covers taking initial and trial weight readings to determine imbalance.

Balance Weight Calculations

Introduces tools for calculating appropriate balance weights.

Section 10: Balancing Walk-through

Trial Weight Reading

Details the process of attaching and measuring the effect of a trial weight.

Trim Balance

Covers performing final adjustments to achieve the desired balance level.

Section 12: Troubleshooting

Resetting the Instrument

Steps for resetting a non-responsive instrument.

Power Problems