Crystal Instruments Spider - Page 6

Spider DSA User’s Manual
6
Full Bridge Connections ...................................................................................................... 216
Remote Sensing ................................................................................................................... 218
Stress Calculations ................................................................................................................... 219
Software .................................................................................................................................. 222
Strain Gage Input Channel Table ....................................................................................... 222
Offset Nulling and Shunt Calibration ..................................................................................... 225
Strain Measurement ............................................................................................................... 228
Stress Calculation Function .................................................................................................... 228
ACOUSTIC ANALYSIS 230
Octave Filters .......................................................................................................................... 230
Full Octave Filters ................................................................................................................ 231
Fractional Octave Filters ..................................................................................................... 232
Nominal center frequencies (mid-band frequencies) ......................................................... 233
Band Edge Frequencies of Fractional Filters ...................................................................... 233
Analysis Frequency Range .................................................................................................. 233
Frequency Weighting .......................................................................................................... 234
Time or RPM based RMS Trace of the Octave Filters .........................................................235
Exponential and Linear Averaging ..................................................................................... 236
Sound Level Meter ................................................................................................................... 237
Terms and Definitions ........................................................................................................ 238
Data Processing Diagram ................................................................................................... 240
SLM Measures ..................................................................................................................... 241
RMS trace of weighted level, time averaged level or sound exposure ................................ 244
Histogram of Time Weighting ............................................................................................ 244
Creating Acoustic Tests ........................................................................................................... 244
Recent Test List.................................................................................................................... 247
Signal List ............................................................................................................................ 247
Control Panel ...................................................................................................................... 249
Measured Signal Setup ........................................................................................................ 251
Test Configuration .............................................................................................................. 252
Running a Test ........................................................................................................................ 252
Viewing Signals ........................................................................................................................253
Test Parameters ...................................................................................................................... 258
FFT Analysis Parameters .................................................................................................... 259
Octave Filter Parameters .................................................................................................... 260
Sound Level Meter Parameters ........................................................................................... 260
ORDER TRACKING 261