Vibration Manual 02
TIME SERIES SETTINGS
SAMPLE RATE
The sample rate slider sets the accelerometer sample rate. It is adjustable from 10Hz to 100Hz. The upper sample rate
is limited by the hardware in the device. The total sample time is then computed from the sample rate and the data length.
SAMPLE DELAY
The sample delay slider allows the start of sampling to be delayed from 0-20 seconds after pressing the Sample button.
This allows sample button to be pressed and the iPhone to be positioned for the best sampling before acquisition begins. The remaining delay time is displayed on the screen as the countdown progresses.
DATA LENGTH
The data length control sets the number of sample points used during acquisition. Selection of more points will result in
a longer data acquisition time as well as the ability to measure lower frequencies. If this value is changed any existing data will be cleared.
TIME SERIES VERTICAL SCALE
The vertical scale control sets the scaling of the time series graph. The selected value will be one division on the graph. The scaling can be changed after acquisition and the result will be immediately reflected in the time series graph.
DC REMOVE SWITCH
The DC remove switch is used to control the automatic removal of the average value. The switch is typically used to
remove the mean gravity vector from the data.
CALIBRATE BUTTON
Switches to the calibration screen to calibrate the accelerometers
TRIGGER BUTTON
Switches to the trigger set up screen to enable and configure level triggering
? BUTTON
The ? icon opens Safari to the Vibration help page table of contents.
Diffraction Limited Design LLC Southington, CT USA • 06489
Phone: (860) 276-0450
Fax: (860) 620-9026 • Contact: Bruce Truax dld-llc.com
TRIGGER BUTTON
Switches to the trigger setup screen to enable and configure level triggering