Instantel 716A0401, Руководство оператора

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Compliance Module
MiniMate Plus Operator Manual
3–11
Use your judgment when setting the trigger level. You must set the level high enough so the
MiniMate Plus does not trigger on unwanted events such as nearby vehicle traffic. At the same
time, you have to set the trigger level low enough so that an event’s activity exceeds the trigger
level and starts the MiniMate Plus recording. Available trigger level ranges appear in the
specifications located in the Appendix of this manual.
To set the trigger level, press the Setups key when the Main Window is displayed. Press the
Enter key to display the Trigger Level Window for the trigger source chosen above. Use the
Right Arrow key to move the cursor and the Up Arrow key to change the trigger level number.
Press the Enter key to save your setting. If both the geophone and microphone were chosen as
trigger sources, pressing the Enter key saves the geophone trigger level setting and then displays
the Mic Trigger Level Window. Set the microphone trigger level and press the Enter key to save
your setting.
On eight channel monitors, set the geophone and microphone trigger levels for the first four
channels then set the geo2 and mic2 trigger levels for channels five to eight.
3.8.7. Record Stop Mode (Single Shot, Continuous and Manual
Modes)
Choose a record stop mode if using the single shot, continuous or manual record modes. The
record stop mode sets how the MiniMate Plus stops recording after being triggered. You can
choose between a Fixed setting or an Auto setting. Fixed sets the record time to a specified length.
For example, you set the MiniMate Plus to record for two seconds in the Basic Tutorial. Once the
record time has elapsed, the MiniMate Plus stops recording. In Auto, unlike in Fixed, the
MiniMate Plus continues to record event activity as long as that activity remains above the trigger
level. (Sufficient memory and battery power must be available). Recording stops a specified
period of time after the event activity falls below the trigger level. The period of time, called the
Auto Window, can be adjusted. See page 3–23.
Remember to set the record time long enough to record an entire event but not too long to avoid
recording unnecessary data and filling the MiniMate Plus memory. Set a record time for single
shot, continuous, and manual record modes.
A helpful rule of thumb when setting a record time for a blast event is to add the delays between
detonating holes or use the longest delay, then add one second for each one thousand feet (300 m)
from the event to the MiniMate Plus to account for the speed of sound. For example, in the figure
below the minimum record time required is 1.1 seconds. To be on the safe side and ensure you
record all the event’s activity, set the record time to 2.0 seconds. There is no single method for
setting a record time. Use your knowledge and experience to determine a record time.
Figure 3.13 Calculating a Recording Time.