Data back erase function setting
Overview of the data back erase function
The LA-1250/1350/4350 has the data back erase function. The back erase function enables to cancel the data for up to 10 seconds past by the built-in buffer memory for temporarily memorizing the data for the last 10 seconds. It is possible to prevent measurement data from being reflected by the external sound suddenly occurred during measurement.
When you start measurement by pressing the panel switch [START], the contents of the buffer memory are initialized at first. Then, the data is stored in it at intervals of 0.1 seconds as the measurement elapsed. When the elapsed measurement time exceeds 10 seconds, the oldest measurement data in the buffer memory is erased and then the latest measurement data is stored.
Within the elapsed time for the measurement data stored in the buffer memory, you can prevent measurement data from being reflected by the external sound suddenly occurred during measurement by means of the back erase function. When you perform back erase operation, the elapsed time of the measurement time display decreases, and the measurement value after data erase is displayed at the measurement value display.
Procedure of erasing the data
When you operate the data erasing, the data stored in the buffer memory are continuously erased retroactively to every two seconds.
The time duration which can be used for back erase operation is 10 seconds. You can erase all the data stored in the buffer memory if the following situations are occurred.
-If the elapsed measurement time is less than 10 seconds because it is immediately after starting measurement.
-If data is not stored in the entire buffer memory because it is immediately after activating back erase operation.
When you press and hold the panel switch [PAUSE] for 0.5 seconds or more, the buffer memory data which is unit of 0.1 second for up to 10 seconds are erased in the unit of 0.2 seconds past. During the data erase operation, the pause mark blinks and the elapsed measurement time decreases.
• When the timer measurement is turned OFF, you can perform the data clearing operation any number of times until measurement is completed.
• When timer measurement is turned ON, you can perform same operation as above within the specified measurement interval.
However, the next measurement is started on schedule even if the actual measurement time of the previous measurement is not sufficient.
When you release the panel switch [PAUSE], the data erase operation is canceled, resulting in the pause condition. At this time, the pause mark stops blinking. When you press the panel switch [PAUSE] again in this condition, measurement is restarted.
When all the measurement data stored in the buffer memory have been erased, condition changed automatically to the pause condition even you press and hold the panel switch [PAUSE].