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[WAVEFORM]

 

When activated, a change in signal level will produce a trigger: 

[SYS] [SETUP TRIGGER] [SETUP WAVEFORM]

.  Pick the channel(s) to 

set up and how it will trigger:  

[SET TYPE / CLASS]

.  When more than one 

channel will be used for triggering, you can select OR or AND combinations.  
Each channel's trigger levels are independent of the other channels.  You can use 
window triggering (either inside or outside the window), level triggering (above 
or below the level), slope triggering (rising, falling or either slope) and slew rate 
triggering. 
 
For window, level and slope triggering, percentage values are listed.  This 
percent value is with respect to the edge-to-edge location on the chart where 0% 
is the bottom of the chart, 50% is the middle of the chart and 100% is the top of 
the chart.  Knowing the signal placement on the chart from analog setup, you can 
pick the appropriate percentage level.  

See exercises in Section 9 for use of 

waveform triggering.

 

 

[EXTERNAL]

 

Allows TTL or switch closure to ground trigger (

see utility port pin-out

). 

 

[CLOCK]

 

Produces a trigger at pre-defined periods.  For example, if it is set to one hour, 
then every hour there will be a trigger.  Also, you can set a one-time trigger at a 
pre-defined date and time. 

 
Once you have set up the analog, data capture and trigger parameters, you can press the 

[ARM]

 button (near the encoder 

wheel) to start a data capture record.  The Dash 4u will be ready for the trigger to complete the record. 
 
 

8.  DATA REVIEW 

 
 
Once a data capture record is complete, several things can be done with the data.  It can be reviewed on the color display, 
played back to the chart paper, copied to the Zip disk or sent to a computer by ethernet. 
 

[SCREEN PREVIEW]

 

[MODE] [DATA RECORD REVIEW] [SCREEN PREVIEW]

 

Part or all of the data can be acted upon.  To help decide what part of the data is 
of interest, the color display allows preview of the data record. 
In the screen preview, there are two cursors (A, B) for selecting data.  You can 
page forward and backward through the data as well as expand or compress the 
time base.  The lower part of the display shows the time and amplitude 
measurements. 
Once you have selected data of interest, you can print the screen to chart paper, 
create a .BMP file on Zip disk, archive data to Zip disk, or play out the data to 
the chart paper. 

 

[SETUP PLAYBACK]

 

[MODE] [DATA RECORD REVIEW] [SETUP PLAYBACK]

 

For playing the data to the chart paper, there is a dedicated set up menu. 
Here is where the format for playback is selected (one of the four charts, 
numeric, X-Y plot).  Also, you can select how much of the data to play back and 
whether to compress or expand the timebase. 

 

 

Throughout the setup of the Dash 4u, you can use the Help sheets to guide you. The System Report and Chart Report 
provide much useful information.  The manual gives details on the keystrokes to achieve what you want to do with the 
Dash 4u.  The above lists the basics of the Dash 4u.  Under many of the menus are additional choices for more advanced 
capabilities of the Dash 4u.  Should you require additional assistance, you can contact our Technical Support Department 
toll-free at 800-343-4039 or by e-mail:  techserv@astro-med.com 

Summary of Contents for Dash 4u

Page 1: ...PANEL CONTROLS 4 REAL TIME RECORDING FUNCTIONS 5 SETTING UP CHARTS AND GRIDS 6 AMPLIFIER SETTINGS 7 DATA CAPTURE 8 DATA REVIEW 9 SAMPLE EXERCISES Astro Med Inc Astro Med Industrial Park 600 East Green...

Page 2: ...not supplied with the Dash 4u There are two physical input sections for each channel You must only use one physical connection at a time For the differential DC Bridge and temperature amplifiers use t...

Page 3: ...paper speed data logger numeric speed select internal or external motor source the speed of the display normal or trend and to adjust the chart speed 2 AMP KEYS Six keys one each for the four signal...

Page 4: ...use is recording at the first selected chart speed utilizing waveform triggering to change to the second chart speed for a predetermined amount of time At that point the recorder will automatically sw...

Page 5: ...the right side of the front panel four keys for the four signal inputs and two keys for the two channels derived from the signal inputs When one of the four signal input channels is selected several...

Page 6: ...e placed SETUP DATA CAPTURE SYS SETUP DATA CAPTURE There are six parameters for setting up data capture SET SAMPLE RATE Use the encoder wheel to select how many samples per second you will take SET RE...

Page 7: ...ure record is complete several things can be done with the data It can be reviewed on the color display played back to the chart paper copied to the Zip disk or sent to a computer by ethernet SCREEN P...

Page 8: ...ed keys on front panel of Dash 4u Stop the chart paper RUN HALT Set Channel 1 to be 0 11 Volts FS AMP 1 ADVANCED CHANGE AMP TYPE The Dash 4u has five amplifier types SET TO SINGLE ENDED Select the sin...

Page 9: ...Turn encoder wheel until trigger window is 10 Set capture for one record SET OPERATION You can capture one record or re arm for more captures Turn encoder wheel for single capture Be sure auto trigger...

Page 10: ...or A is positioned just to the left of the trigger point dotted yellow line on the display t EXPAND ABOUT A The expansion is around where the cursor A is set Print the screen OUTPUT Use encoder wheel...

Page 11: ...HART 4 Set speed to 5 mm sec 5 SEC Common speeds have dedicated keys on front panel of Dash 4u Stop the chart paper RUN HALT Set Channel 1 to be 4 Volts FS AMP 1 ADVANCED CHANGE AMP TYPE The Dash 4u h...

Page 12: ...IGGER Win 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 20 Set capture for one r...

Page 13: ...n the display the trigger point dotted line CURSOR SELECT B Turn encoder wheel so cursor B is positioned just to the right of the trigger point dotted yellow line on the display Expand view around tri...

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