Problem Statement: Need help to isolate "over-range" errors which occur intermittently during vibe measurement
*Objective: Characterize HALT chamber vibration range - Measure acceleration PSD on vibration table of HALT chamber and compare to setpoint
-Accelerometers: 5 single axis, PCB Piezo, +/- 500g range, 10mV/g sensitivity, all attached to table (next to each other) with bees wax
-DAQ: 8-channel Wavebook 512 by IOTech; eZ-Analyst software (both > 12yrs old)
-Configuration: Freq range 10-5000Hz, selected correct accel input range, sensitivity
-At 5Grms - all 5 accels read within 0.3Grms of each other and setpoint
-At 10Grms - all 5 accels read within 0.9Grms of each other and setpoint
-At 15Grms - start observing "over-range" errors on few channels
-At 20Grms - all accels have "over-range" error
-Swapped some accels; error reproduced intermittently/at higher vibe level; Also occurred on 3-axis accel
-Changed accel location to different area of table. Again mixed results - Some channels over-range and sometimes dont.
Would like ideas on how to isolate issue to instrumentation or software. Note: IOtech was bought by National Instruments but do not have any development/support on Wavebook.