12
II. Data Capture
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.
ACTION
HOW TO
Enter Data Capture Setup
[SYS] [SETUP CAPTURE]
Set memory for eight segmented captures
[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.
Set sample rate to 10 kHz
[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
.
Set trigger window to 10%
[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%
.
Be sure auto-triggering is OFF
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
.
Set capture for one record
[CAPTURE CONTROL]
You can capture one record, or re-arm for more
captures. Turn encoder wheel for
single capture
.
Enable waveform triggering
[WAVE]
Waveform should be toggled to
ON
position.
Pick waveform(s) for triggering
[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.
Set up t he level for triggering
[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 the chart
[RUN / HALT]
Arm for capture
[ARM]
This key is located near the encoder wheel. The
Dash
10 is now recording pre-
trigger data, waiting for the trigger.
Input battery voltage into Channel #1
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.
Stop the paper
[RUN / HALT]
Exit Data Captur e Menu
[EXIT MENU]
Proceed to the next page to review and playback the data capture.
