Wavetronix SmartSensor 105 (SS-105) - User Guide Manual de usuario descargar pdf (Pagina 77)

76 CHAPTER 7  DATA COLLECTION

e sensor’s SRAM buer contains up to 246 of the most recent interval data records.

is type of storage is temporary because SRAM is volatile—its contents will be lost if the

sensor’s power supply is interrupted. e sensor’s ash memory buer contains up to 2975

interval data records. is type of storage is permament because ash memory is nonvola-

tile—it will retain its contents even if the sensor’s power supply is interrupted.

Note

The smallest amount of ﬂash memory that can be erased at one time represents

several interval data records. As a result, if you are collecting data with the Memory

Ovewrite feature enabled, you will not typically see the buer ﬁll up 100%. In fact,

you may see the usage fall from near 100% to something near 80%. This is because

as usage approaches 100%, a portion of the oldest contents are erased in order to

make room for newer data.

If you want to force the contents of the sensor’s SRAM buer to be written to ash mem-

ory, click the Transfer>> button.

Data Download

To download interval data stored on the sensor in the SRAM and ash memory buers—

such as data collected in a study—go to Data Collection > Download. e screen that

comes up is divided into two sections, Download Interval Data and Interval Data Buers

(see Figure 7.3).

Figure 7.3 – Data Download

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Wavetronix SmartSensor 105 (SS-105) - User Guide Manual de usuario Pagina 77