Atec Commtest-VB8 - Manual (Page 2)

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SPECIFICATIONS vb8 ® DATA ANALYZER REMARKS
Sensors
Sensor input 4 channels Simultaneous sampling
Compatible Sensor Types Accelerometer, velocity,
displacement, current, voltage
output, 4 to 20 mA
AC coupled range 16 V peak-peak Allows for ± 8 V sensor output
swing (± 80 g)
DC coupled ranges 0 V to 20 V, -10 V to 10 V,
-20 V to 0 V
E.g. for reading prox-probe gap
Connectors 1 x BNC (CH1)
1 x LEMO (CH2/CH3/CH4)
Safety feature: Break-free
inline connector
Analog to digital conversion 24-bit ADC
Sensor excitation current 0 mA or 2.2 mA (configurable),
24 V maximum
2.2 mA required for ICP®-type
accelerometer
Sensor detection Warns if short circuit or not
connected
Tachometer
Sensor Laser sensor, reflective tape Sensor triggers on beam
reflection
Laser sensor range 10 cm to 2 m nominal Depends on size of reflective
tape
Other sensor types supported Contact, TTL pulse,
Keyphasor ®
Instrument has optically
isolated input
Power supply to sensor 5 V, 50 mA
TTL pulse rating 3.5 V (4 mA) min, 28 V (5 mA)
max, off-state 0.8 V
Keyphasor® thresholds 7.7 ± 0.5 V, 13.3 ± 0.8 V,
18.8 ± 1 V
Nominally 8 V, 13 V, 18 V
Speed range 10 to 300 000 RPM (0.2 Hz to
5 kHz)
Pulse width at least 0.1 ms
Accuracy +/- 0.1%
Output to drive strobe Up to 140 Hz (8400 CPM) Typical. Depends on strobe
type. Special cable required.
Parameter Indication
Maximum levels > 1000 g (10 000 m/s2)
> 1000 in/sec (25 000 mm/s)
> 100 in (2500 mm),
> 10 000 Amps
Effective limit is sensor
sensitivity and output voltage
Dynamic signal range > 95 dB Typical at 400 line resolution
Harmonic distortion Less than -70 dB typical Other distortions and noise
are lower
Units g or m/s2 or adB
in/s or mm/s or vdB
mil or mm or µm
amps, user-defined
0-peak, peak-peak or RMS.
Auto-scale by 1000x when
required. US & SI options for
both adB & vdB.
Magnitude & cursors Overall RMS value, waveform
true pk-pk, dual cursors,
harmonics
Digital readouts on chart
Base accuracy ± 1% (approx. 0.1 dB) For DC level: % of full scale.
For AC signal: % of reading
High frequency attenuation ≤ 0.1 dB 100 Hz to 10 kHz
≤ 3 dB >10 kHz to 40 kHz
Attenuation tolerances are in
addition to base accuracy
AC coupling attenuation ≤ 0.1 dB 10 Hz to <100 Hz
≤ 3 dB 1 Hz to <10Hz
Attenuation due to Integration ≤ 0.1 dB 1 Hz to <100 Hz
≤ 1.5 dB 0.2 Hz to <1 Hz
≤ 0.1 dB 10 Hz to <100 Hz
≤ 1.5 dB 1 Hz to <10 Hz
Low freq. mode: When coupling
= DC, Fmax ≤ 100 Hz. Normal
mode: Applicable in all other
cases. Values apply to single
integration (accel. to veloc.).
Double the values for double
integration (accel. to displ.).
Spectrum Display
Fmax ranges 25, 50, 100, 125, 150, 200, 300,
400, 500, 600, 800, 1000, 1200,
1600, 2000, 2500, 3000, 4000,
5000, 6000, 8000, 10 000,
15 000, 20 000, 30 000, 40 000,
60 000, 80 000 Hz
Or equivalent CPM values
Or orders-based from 1X to
999X
Fmin possible range 0 to Fmax Instrument zeroes all spectral
lines below Fmin
Resolution 400, 800, 1600, 3200, 6400,
12 800 lines
6400 lines max. for 2-channel
measurements.3200 lines max.
for 4-channel measurements.
Frequency scale Hz, CPM, Orders Linear scale with zooming
Amplitude scale Acceleration, velocity,
displacement, current, or
user-defined
Linear or log scales, auto or
manual scaling
Window shapes Hanning, rectangular
Overlap (0, 12.5, 25, 37.5, 50, 62.5, 75,
87.5) %
Dependent on Fmax and
number of lines
Number of averages 1, 2, 4, 8, 16, 32, 64, 128 Increases sampling time
proportionally
Averaging types Linear, exponential,
peak hold, synchronous
SPECIFICATIONS vb8 ® DATA ANALYZER REMARKS
Spectrum Display Continued
Demodulation bandwidths 23 bandwidth options From 125 Hz to 1250 Hz up to
16 kHz to 20 kHz
6Pack Up to 40 kHz & 3200 lines 1
channel. Up to 20 kHz & 1600
lines 3 channel.
Spectrum and waveform for
low freq, high freq, demod.
Order tracking Up to 6 kHz Fmax, orders-
based
Tachometer required, mounted
on high-speed shaft
Order tracking - Distortion Less than -65 dB Within 50% to 200% speed
variation during recording
Waveform Display
Number of samples 1024, 2048, 4096, 8192,
16 384, 32 768
Time scale 10 ms to 512 seconds Or orders based from 1 to
999 revs
Time synchronous averages 1, 2, 4, 8, 16, 32, 64, 128 Only available when tach.
triggered
Long time waveform Fmax 25 Hz to 40 kHz Fmax 20 kHz 2- or 4-channel
Long time waveform duration 14.7 million samples (total over
channels)
E.g. for Fmax 1 kHz, Fsample =
2.56 kHz and Duration= 1.6 hrs
Logging & Analysis
Output formats Instrument screen, transfer to
Ascent ® , XML, UFF
Data storage Dual 1 GB non-volatile flash
memories
Database mirror copy on
second flash memory
Data storage structure Folders / machines / points /
locations /routes
No limits applied, 50 character
names
Max folder size 10 000 measurement locations
Modal analysis CH1 for hammer, up to 3
response channels, ≤ 10 kHz
Coherence & FRF
(Accelerance/Mobility/
Compliance)
Cross channel spectrum 1 reference, up to 3 other
sensors
Coherence & FRF for importing
into ODS software
Balancing
Planes Up to 2 planes, 4 sensors
Speed range 30 to 60 000 RPM
Measurement type Acceleration, velocity,
displacement
Weight modes Angle 0° to 360°, fixed position,
circumference arc
E.g. weights on fan blades,
linear distance around
circumference
Remove trial weights Yes/No Automatic recalculation
Manual data entry Yes Allows re-entry of previous
balance jobs
Storage Against machines in data
structure
No limits applied
Display & Communication
Display Graphic Grayscale LCD White LED Backlight
Resolution & size 480 x 320 (HVGA), 5.5” (140
mm)
Readable in direct sunlight
Supported languages ENG, FRE, SPA, POR, RUS, CHI Firmware releases in English,
translations follow
Communication with PC USB and Ethernet Use PROFLASH to upgrade
USB host port USB 2.0, supplying 5V, 250 mA Save folders to USB flash drive
UFF export Spectra, Coherence, FRF mag.
& phase
Universal File Format for
Modal & FRF data
Battery & Charger
Battery type Custom Lithium Ion pack,
7.4 V, 4500 mAh
Operating time 10 hours Backlight on (60 second
time-out)
Charger type Internal charging,
automatic control
External Power pack 12 V DC,
3 A output
Charge rate 3 A nominal 3 hours for complete charge
Mechanical
Size 9.9” W x 5.8” L x 2.4” H
(252 x 148x 60) mm
Weight 2.7 lb (1.2 kg) Including battery and strap
Environmental
Operating temperature 14 °F to 122 °F (-10 to 50) °C
Storage temperature &
humidity
-4 °F to 140 °F (-20 to 60) °C,
95% RH
If storage exceeds 1 month: Up
to 95F (35 C), 85% RH
EMC EN61326
Ruggedness 4’ (1.2m) drop on concrete, IP65 Procedure: 26 drops following
MIL-STD-810F-516.5-IV
Hazardous locations CSA Class I, Division 2 (Groups
A, B, C, D)
Certification