Manual

C-5
UltraSpec Analyzer Input Specifications
UltraSpec Analyzer Input Specifications
Input Signal Types
A two milliamp ICP type power supply inside the instrument powers sen-
sors such as accelerometers. This power supply provides a 2 milliamp con-
stant current at 20 volts nominal. ICP power may be used or bypassed
depending upon type of input selected.
• ICP Used: + 9 volts
• ICP Bypassed: + 21 volts
• Input Impedance: greater than 150 k ohms
• A/D Converter: 12 bits accuracy
• Dynamic Range: 70 dB or greater
Note
Full scale vibration level depends on the type of sensor used
and its sensitivity. Full scale vibration level is ± 90 g’s when
using an accelerometer with a sensitivity of 100 mV/g.
Autoranging
The UltraSpec analyzer automatically scans the input signal for each mea-
surement. It sets the input range to maximize the dynamic resolution while
maintaining the dynamic range of the A/D converter at 72 dB. Full-scale
ranges from 21V to 8 mV are supported. The noise floor is typically less
than 3 microvolts for a 400-line spectra taken using a 1000 Hz maximum
frequency.
Input Sensor Types (ProAlign Plus Only)
Portable sensors: Laser sensor heads (Model 8215/Model 8225)