ASTRO-MED Dash 10 Manuel de démarrage rapide - Page 13
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II. Data Capture
ACTION
Enter Data Capture Setup
Set memory for eight segmented captures
Set sample rate to 10 kHz
Set trigger window to 10%
Be sure auto-triggering is OFF
Set capture for one record
Enable waveform triggering
Pick waveform(s) for triggering
Set up t he level for triggering
Run the chart
Arm for capture
Input battery voltage into Channel #1
Stop the paper
Exit Data Captur e Menu
Note: On some models, data capture was an option. If your model does not have data
capture, the menus for data capture will not be present.
Capture data when the battery voltage is applied. Set up a single data capture
for 7.15 seconds. Capture almost one second of pre-trigger data to show what the signal
looked like be fore the battery voltage was applied. For this capture, a waveform trigger
will be used to detect when the battery voltage is applied.
HOW TO
[SYS] [SETUP CAPTURE]
[RECORD SIZE]
Turn encoder wheel so that Record Size = 11 X 69K. If not, press
[more] key. Turn encoder wheel and observe that events ("evts") as well as all ten
channels are enabled. Press softkey [ENABLE] for those channels and events that are
disabled. Press [more] to return to previous menu.
[SAMPLE RATE]
The number of samples per second. In general, select at least ten
times the frequency of your signal or the frequency of any changes in the signal.
Turn encoder wheel until sample rate is 10 kHz.
[TRIGGER POS]
Placing the trigger at any point other than the start of the capture
window will allow for pre-trigger data to be captured. Turn encoder wheel until trigger
window is 10%.
Autotrig:
Autotrig is "self-triggering". That is, the Dash 10 triggers itself as soon it
is armed for a data capture.
If auto -triggering is ON, toggle to OFF.
[CAPTURE CONTROL]
captures. Turn encoder wheel for single capture.
[WAVE]
Waveform should be toggled to ON position.
[SETUP WAVE]
The display shows the OR trigger settings. Set the OR trigger to
read OR:01. If more than one channel shows, press [DELETE] to remove them. If the
remaining channel is not 01, turn encoder wheel to select 01.
Note – If the display lists "waveAND" in the OR: trigger settings, press
[DEL AND] to remove it.
[LEVELS] Set [WINDOW] to outside. Press [LOW] level and turn encoder wheel
until the level is off. Press [HIGH] level and turn encoder wheel until level is 80%.
[EXIT] [EXIT] [EXIT] .
[RUN / HALT]
[ARM] This key is located near the encoder wheel. The Dash 10 is now recording pre-
trigger data, waiting for the trigger.
A trigger should be produced and the capture continues to the end. While capturing,
you should have seen the waveform for Channel #1 increase from the bottom of the
channel to near the top on both the display and the chart.
Note: you do not need to run the chart when you capture data.
[RUN / HALT]
[EXIT MENU]
Proceed to the next page to review and playback the data capture.
You can capture one record, or re-arm for more
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