14 Chadwick-Helmuth Company, Inc.
Chapter 2 - System Overview
Accuracy ±.5dB, from 5 Hz to 500 Hz; ±1dB, from
500 Hz to 10,000 Hz
Acquisition capability 2 vibration and 2 tachometer (azimuth)
Balance Measurements
Phase units Hours and minutes
Phase resolution 2 min or 1°
Phase accuracy ±15°
Balance frequency range 120 to 30,000 RPM
Spectrum Analysis
Analysis ranges
(maximum frequencies)
1200, 3000, 6000, 12,000, 30,000, 60,000,
120,000, 300,000 and 600,000 RPM
Window type Flat top
FFT resolution 400 lines
Signal Conversion (Vibration Inputs)
Channel configuration
options
Sensor type - Model 7310 Velocimeter
Coupling Type - ac
High-pass filter 3-pole Chebyshev, -3.0 dB @ 1.5 Hz
Analog-to-digital
converter type
13-bit
Spurious free dynamic
range
>50dB
Input ranges 0 to 380 mV peak (20 IPS)
Input sensitivity 19 mV/IPS peak
Characteristic Specifications (Continued)
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