ASTRO-MED Dash 16u Посібник із швидкого старту - Сторінка 9
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Друкувати сторінкуII. Data Capture
DISCUSSION
ACTION
Enter data capture setup
Format memory
Select capture of all channels
Set sample rate to 1 kHz
Set record size to 64 Ks
Set trigger window to 10%
Set capture for one record
Be sure auto-triggering is OFF
Enter trigger setup
Enable waveform triggering
Set up the logic for triggering
Pick waveform(s) for triggering
Set up the level for triggering
Run the chart
Arm for capture
Set up one data capture for 7.28 seconds. The capture should be triggered when
the battery voltage is applied. The data capture should be a total of 7.28 seconds.
Of the total capture time, 0.728 seconds of the capture should show what the
signal looked like before the battery voltage was applied.
HOW TO
[SYS] [SETUP DATA CAPTURE]
[ADVANCED] [FORMAT CAPTURE MEMORY] Use encoder wheel to
select 16 records x 256 Ks maximum. [BEGIN] [BEGIN] [EXIT] [EXIT]
[SET CHANNELS TO STORE] [DEFAULT]
[EVENT CHANNELS] Toggle to SAVED to include event markers with the
capture. [EXIT]
[SET 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
signal. Turn encoder wheel until sample rate is 1 kHz.
[SET RECORD SIZE] The Dash 16u will give you the amount of time that data
will be captured based on the record size and the sample rate. This is shown
under the duration field. Turn encoder wheel until record size is 64 Ks.
[SET TRIGGER WINDOW] 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%.
[SET OPERATION] You can capture one record or re-arm for more captures.
Turn encoder wheel for single capture.
[ADVANCED] [AUTO TRIGGER] If auto-triggering is ON, toggle to OFF.
[SYS] [SETUP TRIGGER]
[WAVEFORM] Waveform should be toggled to ON position.
[TOGGLE LOGIC] Insure that OR logic is chosen.
Turn encoder wheel so that only Channel #1 is selected.
[SETUP WAVEFORM] [SET CHANNEL] Turn encoder wheel to select
Channel #1. [SET TYPE / CLASS] Use wheel to select level - above for type of
trigger. [<<FIELD>>] Turn encoder wheel to 80% (8.8 volts).
[RUN / HALT]
[ARM] This key is located near the encoder wheel. The Dash 16u is now
recording pre-trigger data, waiting for the trigger.