The complete four-channel

vibration analysis package

Key features

The vb8® analyzer is a uniquely Ascent® Level 2 software:

sophisticated and feature-packed • Fully automated measurement parameter
instrument that remains intuitive in and alarm setups based on The Proven Method
operation and flexible enough to suit from Technical Associates
every level of vibration analysis, from • ISO 2372 and 10816 standards
novice through to expert.
Enhanced instrument functionality:
The Ascent® software included contains • 4 channel simultaneous recordings
the collective experience of over 25 years • Triax-enabled
of expert in-depth machine fault analysis. • 12 800 lines FFT resolution
• 80 kHz Fmax
1. Users with no prior experience • 1GB memory – Virtually unlimited spectra storage
or without a previously recorded • Modal Impact Testing & Cross Channel Spectrum (ODS)
vibration history can now establish a • Ability to export data in Universal File Format
measurement program utilizing proven (UFF) for additional analysis in ODS software such as
baseline values from ISO standards Vibrant Technology ME'scope
and The Proven Method from Technical • Support for acceleration, velocity, displacement,
Associates. DC-coupled, current and voltage output sensors
2. Experienced users can now generate • Simultaneous acquisition – 2 plane balancing
meaningful spectral alarm bands with up to 4 sensors
automatically rather than just relying • Unique Commtest 6Pack™ recording system
on basic overall alarms or spectral • Numeric parameter input via keypad with
band guesswork. Ascent® trend and alarm capability
3. Veteran analysts can now objectively • Option to add Flex features like Remote Comms & Wi-Fi
evaluate and compare their findings • Cable Test mode
against a time-tested and proven • Upgradable Proflash system and free
historical foundation. firmware updates for 5 years

Contact us on +64 3 943 0700, sales@commtest.com or visit www.commtest.com

SPECIFICATIONS vb8® DATA ANALYZER REMARKS SPECIFICATIONS vb8® DATA ANALYZER REMARKS

Sensors Spectrum Display Cont.

Sensor input 4 channels Simultaneous sampling Demodulation bandwidths 23 bandwidth options From 125 Hz to 1250 Hz up to
16 kHz to 20 kHz
Compatible Sensor Types Accelerometer, velocity,
displacement, current, voltage 6Pack Up to 40 kHz & 3200 lines 1 Spectrum and waveform for
output, 4 to 20 mA channel. Up to 20 kHz & 1600 low freq, high freq, demod.
AC coupled range 16 V peak-peak Allows for ± 8 V sensor output lines 3 channel.
swing (± 80 g) Order tracking Up to 6 kHz Fmax, orders-based Tachometer required, mounted
DC coupled ranges 0 V to 20 V, -10 V to 10 V, E.g. for reading prox-probe gap on high-speed shaft
-20 V to 0 V
Order tracking - Distortion Less than -65 dB Within 50% to 200% speed
Connectors 1 x BNC (CH1) Safety feature: Break-free variation during recording
1 x LEMO (CH2/CH3/CH4) inline connector
Analog to digital conversion 24-bit ADC Waveform Display

Sensor excitation current 0 mA or 2.2 mA (configurable), 2.2 mA required for ICP®-type Number of samples 1024, 2048, 4096, 8192,
24 V maximum accelerometer 16 384, 32 768

Sensor detection Warns if short circuit or not Time scale 10 ms to 512 seconds Or orders based from 1 to
connected 999 revs

Tachometer Time synchronous 1, 2, 4, 8, 16, 32, 64, 128 Only available when tach.
averages triggered
Sensor Laser sensor, reflective tape Sensor triggers on beam Long time waveform Fmax 25 Hz to 40 kHz Fmax 20 kHz 2- or 4-channel
reflection
Laser sensor range 10 cm to 2 m nominal Depends on size of reflective Long time waveform 14.7 million samples (total over E.g. for Fmax 1 kHz, Fsample =
tape duration channels) 2.56 kHz and Duration= 1.6 hrs

Other sensor types supported Contact, TTL pulse, Instrument has optically Logging & Analysis
Keyphasor® isolated input Output formats Instrument screen, transfer to
Power supply to sensor 5 V, 50 mA Ascent®, XML, UFF
Data storage Dual 1 GB non-volatile flash Database mirror copy on
TTL pulse rating 3.5 V (4 mA) min, 28 V (5 mA) memories second flash memory
max, off-state 0.8 V
Data storage structure Folders / machines / points / No limits applied, 50 character
Keyphasor® thresholds 7.7 ± 0.5 V, 13.2 ± 0.8 V, Nominally 8 V, 13 V, 18 V locations /routes names
18.5 ± 1 V
Max folder size 10 000 measurement locations
Speed range 10 to 300 000 RPM (0.2 Hz to Pulse width at least 0.1 ms
5 kHz) Modal analysis CH1 for hammer, up to 3 Coherence & FRF
Accuracy +/- 0.1% response channels, ≤ 40 kHz (Accelerance/Mobility/
Compliance)
Output to drive strobe Up to 140 Hz (8400 CPM) Typical. Depends on strobe Cross channel spectrum 1 reference, up to 3 other Coherence & FRF for importing
type. Special cable required. sensors into ODS software
Parameter Indication Balancing
Maximum levels > 1000 g (10 000 m/s2) Effective limit is sensor Planes Up to 2 planes, 4 sensors
> 1000 in/sec (25 000 mm/s) sensitivity and output voltage Speed range 30 to 60 000 RPM
> 100 in (2500 mm),
> 10 000 Amps Measurement type Acceleration, velocity,
displacement
Dynamic signal range > 95 dB Typical at 400 line resolution
Weight modes Angle 0° to 360°, fixed position, E.g. weights on fan blades,
Harmonic distortion Less than -70 dB typical Other distortions and noise circumference arc linear distance around
are lower circumference
Units g or m/s2 or adB 0-peak, peak-peak or RMS. Remove trial weights Yes/No Automatic recalculation
in/s or mm/s or vdB Auto-scale by 1000x when
mil or mm or µm required. US & SI options for Manual data entry Yes Allows re-entry of previous
amps, user-defined both adB & vdB. balance jobs
Magnitude & cursors Overall RMS value, waveform Digital readouts on chart Storage Against machines in data No limits applied
true pk-pk, dual cursors, structure
harmonics Display & Communication
Base accuracy ± 1% (approx. 0.1 dB) For DC level: % of full scale.
For AC signal: % of reading Display Graphic Grayscale LCD White LED Backlight

High frequency attenuation ≤ 0.1 dB 100 Hz to 10 kHz Attenuation tolerances are in Resolution & size 480 x 320 (HVGA), 5.5” (140 mm) Readable in direct sunlight
≤ 3 dB >10 kHz to 40 kHz addition to base accuracy Supported languages Eng, Chi, Fre, Ger, Jap, Por, Firmware releases in English,
AC coupling attenuation ≤ 0.1 dB 10 Hz to <100 Hz Rus, Spa translations follow
≤ 3 dB 1 Hz to <10Hz Communication with PC USB and Ethernet Use PROFLASH to upgrade
Attenuation due to Integration ≤ 0.1 dB 1 Hz to <100 Hz Low freq. mode: When coupling (Wi-Fi optional)
≤ 1.5 dB 0.2 Hz to <1 Hz = DC, Fmax ≤ 100 Hz. Normal USB host port USB 2.0, supplying 5V, 250 mA Save folders to USB flash drive
≤ 0.1 dB 10 Hz to <100 Hz mode: Applicable in all other
≤ 1.5 dB 1 Hz to <10 Hz cases. Values apply to single UFF export Spectra, Coherence, FRF mag. Universal File Format for
integration (accel. to veloc.). & phase Modal & FRF data
Double the values for double Battery & Charger
integration (accel. to displ.).
Battery type Custom Lithium Ion pack,
Spectrum Display 7.4 V, 4500 mAh
Fmax ranges 25, 50, 100, 125, 150, 200, 300, Or equivalent CPM values Operating time 10 hours Backlight on (60 second
400, 500, 600, 800, 1000, 1200, Or orders-based from 1X to time-out)
1600, 2000, 2500, 3000, 4000, 999X
5000, 6000, 8000, 10 000, Charger type Internal charging, External Power pack 12 V DC,
15 000, 20 000, 30 000, 40 000, automatic control 3 A output
60 000, 80 000 Hz Charge rate 3 A nominal 3 hours for complete charge
Fmin possible range 0 to Fmax Instrument zeroes all spectral Mechanical
lines below Fmin
Size 9.9” W x 5.8” L x 2.4” H
Resolution 400, 800, 1600, 3200, 6400, 6400 lines max. for 2-channel (252 x 148x 60) mm
12 800 lines measurements.3200 lines max.
for 4-channel measurements. Weight 2.7 lb (1.2 kg) Including battery and strap

Frequency scale Hz, CPM, Orders Linear scale with zooming Environmental

Amplitude scale Acceleration, velocity, Linear or log scales, auto or Operating temperature 14 °F to 122 °F (-10 to 50) °C
displacement, current, or manual scaling Storage temperature & -4 °F to 140 °F (-20 to 60) °C, If storage exceeds 1 month: Up
user-defined humidity 95% RH to 95F (35 C), 85% RH
Window shapes Hanning, rectangular EMC EN61326
Overlap (0, 12.5, 25, 37.5, 50, 62.5, 75, Dependent on Fmax and Ruggedness 4’ (1.2m) drop on concrete, IP65 Procedure: 26 drops following
87.5) % number of lines MIL-STD-810F-516.5-IV
Number of averages 1, 2, 4, 8, 16, 32, 64, 128 Increases sampling time Hazardous locations CSA Class I, Division 2 (Groups
proportionally A, B, C, D)
Averaging types Linear, exponential, Certification
peak hold, synchronous

Contact us on +64 3 943 0700, sales@commtest.com or visit www.commtest.com