Appendix: Specifications; Vbbalancer - Commtest Instruments vbBalancer Instrument Reference Manual

Appendix: Specifications

vbBalancer

Specifications
Sensors
Sensor input
Sensors
AC coupled range
Connectors
Analog to digital conversion
Sensor excitation current
Sensor detection
Tachometer
Sensor
Laser sensor range
Other Sensor types supported
Power supply to sensor
TTL Pulse rating
Keyphasor® threshold
Speed range
Parameter Indication
Maximum levels
Dynamic signal range
Harmonic distortion
Units
Magnitude & Cursors
Accuracy
Frequency response
Spectrum Display
Fmax possible ranges
Fmin possible range
Resolution
Frequency scale
Amplitude scale
Window shapes
Overlap
Number of averages
Averaging types
Waveform Display
Number of samples
Time scale
Logging Features
Output formats
Data storage
Data storage structure
Max Folder size
Direct print reports
Balancing
Planes
Speed range
Measurement type
Weight modes
Remove trial weights
Manual data entry
Storage
Channel selection
122 Appendix: Specifications
Model vbBalancer
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
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)
> 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
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
1024, 2048
80 ms to 32 seconds
vb screen
1 GB non-volatile flash memory
Folders / machines / points / locations
10 000 measurement locations
Via Ethernet to PCL-enabled printer
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
Remarks
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
Sensor triggers on beam reflection
Dependent on size of reflective tape
vb has optically isolated input
Battery voltage with current limit
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
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
Or orders based from 1 to 999 revs
Virtually unlimited recording storage!
No limits are applied, 50 character names
e.g. weights on fan blades, linear dist. around circumference
Automatic recalculation
Allows re-entry of previous balance jobs
No limits are applied