Scope Multimeter Saving Data Files
127
Zoom Example
While monitoring a MAF (Mass Air Flow Sensor) signal, the waveform displays
normally. As the signal is being monitored, an erratic “condition” suddenly develops,
then goes away, but may have not been observed on the screen. Pausing the data
capture (when such an event occurs) allows you to analyze the waveform using a
higher zoom level (wider view) to look for a glitch in the signal.
The following three illustrations show a generic square waveform to illustrate this
method.
1 - Monitoring / Capturing waveform as it displays normally (Figure 12-39). You may
not see a glitch, while monitoring at this setting.
Figure 12-39
2 - Pause data capture and then zoom out (this example is at 256X) to see more
data and to possibly find a glitch (Figure 12-40). In this example the cursor has
been placed on the right side of a glitch. The waveform is too compressed to see
any detail, however the glitch stands out as a thin light area in the waveform.
Figure 12-40
3 - Zoom back in (this example is at 8X) to view more detail (Figure 12-41) in the
area where the cursor was placed by the glitch.
Figure 12-41
12.9 Saving Data Files
Selecting the Save icon writes the data stored in buffer memory to a file. Saving
data files is useful when trying to isolate an intermittent problem or to verify a repair
during a road test. The saved file can be played back (similar to a movie clip) by
selecting Previous Vehicles and Data > View Saved Data. See View Saved Data
on page 136 for additional information.
The Save icon performs the same function as “Save Movie” function choice
for the programmable Shortcut button, see Configure Shortcut Button on
page 140 for details.
The saved file can also be downloaded to a personal computer (PC) using the Mini
USB jack. Once connected to the PC, the files can be printed, transferred, and
copied using ShopStream Connect. ShopStream Connect is a companion
application that interfaces the diagnostic tool with a PC. ShopStream Connect is
available at no cost, and can be downloaded online. See the ShopStream Connect
website information at the front of this manual for additional information.
The toolbar control icons are described in Scope Multimeter Control Icons on
page 104 and Common Toolbar Control Icons on page 9.
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