3M SE, DL user manual Results of back-erasing,  How to back-erase

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Back-erasing

Results of back-erasing

Results of back-erasing

Back erasing causes the following changes to the study and to the session in which the study occurs.

•Run times - The run time of the back-erased study is shortened by the duration of the removed segment. The run time of the session is also reduced by the same amount.

•Measurements - All measurements that use data that was removed by back-erasing are corrected, as appropriate. For example, if the maximum SPL had occurred in that erased segment, the instrument re-evaluates the remaining data in the study to find a different maximum value.

•Meters - Back-erasing applies on the same basis to both meters.

•Storage - The session file is corrected to reflect the new run times and other changes that resulted from the back-erasing.

•Back erased raw data - The raw data that you removed by back- erasing is saved in the session’s file. You can post-edit back-erased data with DMS software.

How to back-erase

1.While running a study, view the Time Log screen in either the View Current Study or the View Session viewing area.

2.If you see data that you would like to remove from the study, press the pause key to pause the study.

3.Press the left arrow to move the back-erase Time Line from right to left. With reference to the Time Log figure below, the Time Line starts at the Zero Marker and can be moved all the way across the screen to the 20- second Marker. All of these characteristics help you identify the segment to be back- erased.

•Zero Marker - Identifies the end of the back-erased segment. This is always the end of the study.

•Time Line - Identifies the beginning of the back-erased segment.

Models SE and DL